Texas Instruments TI Designs Reference

Ajinder Singh, Natarajan Viswanathan

TI Designs

Wireless Heart Rate Monitor Reference Design

TI Designs Design Features

TI Designs provide the foundation that you need The Wireless Heart Rate Monitor with Bluetooth® low­including methodology, testing and design files to energy (BLE) is a reference design for customers to
quickly evaluate and customize and system. TI develop end-products for battery-powered 3-channel
Designs help you accelerate your time to market. health and fitness electrocardiogram (ECG)

Design Resources

TIDA-00096
ADS1293 Product Folder
CC2541 Product Folder
TPS61220 Product Folder

CC Debugger

Tool Folder Containing Design Files

Small Programmer and Debugger for
Low-Power RF System-on-Chips

applications.

• Supports 5-Lead ECG applications

• Easily monitor heart rate data through an iOS
Mobile Application

• Powered by a Lithium-ion battery

• EMI filters integrated in the ADS1293 device reject
Interference from outside RF sources

• Open-source Firmware and iOS application
enables quick time-to-market for customers

Featured Applications

• Health and Fitness

ASK Our Analog Experts
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An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and other
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System Description

1 System Description

The heart of the Wireless Heart Rate Monitor is the ADS1293 device (analog front-end) and the CC2541
device (Bluetooth-low energy SOC) as shown in Figure 1. The ADS1293 device is a highly integrated low­power analog front-end (AFE) that features three high-resolution ECG channels. The CC2541 system-on­chip (SoC) adds a BLE wireless feature to the platform. BLE enables seamless connectivity to an iPhone®
or an iPad® through a configurable iOS application that allows an end-user to remotely monitor the heart­rate data of a patient.

1.1 ADS1293

The ADS1293 incorporates all features commonly required in portable, low-power medical, sports, and
fitness electrocardiogram (ECG) applications. With high levels of integration and exceptional performance,
the ADS1293 enables the creation of scalable medical instrumentation systems at significantly reduced
size, power, and overall cost.

The ADS1293 features three high-resolution channels capable of operating up to 25.6ksps. Each channel
can be independently programmed for a specific sample rate and bandwidth allowing users to optimize the
configuration for performance and power. All input pins incorporate an EMI filter and can be routed to any
channel via a flexible routing switch. Flexible routing also allows independent lead-off detection, right leg
drive, and Wilson/Goldberger reference terminal generation without the need to reconnect leads
externally. A fourth channel allows external analog pace detection for applications that do not utilize digital
pace detection. For the ADS1293 block diagram, see Figure 2.

The ADS1293 incorporates a self-diagnostics alarm system to detect when the system is out of the
operating conditions range. Such events are reported to error flags. The overall status of the error flags is
available as a signal on a dedicated ALARMB pin. The device is packaged in a 5-mm × 5-mm × 0,8-mm,
28-pin LLP. Operating temperature ranges from –20°C to 85°C.

www.ti.com

1.2 CC2541

The CC2541 is a power-optimized true system-on-chip (SoC) solution for both Bluetooth low energy and
proprietary 2.4-GHz applications. It enables robust network nodes to be built with low total bill-of-material
costs. The CC2541 combines the excellent performance of a leading RF transceiver with an industry­standard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other
powerful supporting features and peripherals. The CC2541 is highly suited for systems where ultralow
power consumption is required. This is specified by various operating modes. Short transition times
between operating modes further enable low power consumption.

The CC2541 is pin-compatible with the CC2540 in the 6-mm × 6-mm QFN40 package, if the USB is not
used on the CC2540 and the I2C/extra I/O is not used on the CC2541. Compared to the CC2540, the
CC2541 provides lower RF current consumption. The CC2541 does not have the USB interface of the
CC2540, and provides lower maximum output power in TX mode. The CC2541 also adds a HW I2C
interface.

The CC2541 is pin-compatible with the CC2533 RF4CE-optimized IEEE 802.15.4 SoC. The CC2541
comes in two different versions: CC2541F128/F256, with 128 KB and 256 KB of flash memory,
respectively. For the CC2541 block diagram, see Figure 3.

1.3 TPS61220

The TPS6122x family devices provide a power-supply solution for products powered by either a single­cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Possible output
currents depend on the input-to-output voltage ratio. The boost converter is based on a hysteretic
controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent
currents. The output voltage of the adjustable version can be programmed by an external resistor divider,
or is set internally to a fixed output voltage. The converter can be switched off by a featured enable pin.
While being switched off, battery drain is minimized. The device is offered in a 6-pin SC-70 package
(DCK) measuring 2 mm × 2 mm to enable small circuit layout size. For the TPS61220 block diagram, see

Figure 4.

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ADS1293

Analog Front End

CC2541

ADC + uP + BLE

TPS61220

Boost Converter

Battery

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2 Block Diagram

Figure 1. Temperature Transmitter System Block Diagram

2.1 Highlighted Products

The Wireless Heart Rate Monitor Reference Design features the following devices:

• ADS1293
– ADS1293 Low Power, 3-Channel, 24-Bit Analog Front End for Biopotential Measurements

• CC2541
– 2.4-GHz Bluetooth™ low energy and Proprietary System-on-Chip

• TPS61220
– TPS6122x Low Input Voltage, 0.7V Boost Converter With 5.5μA Quiescent Current

For more information on each of these devices, see the respective product folders at www.TI.com.

Block Diagram

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CH1-ECG

CH2-ECG

CH3-ECG

Lead off

detect

-

+

EMI
filter

CSB

SCLK

SDI

SDO

OSC

IN1

Flexible
Routing

Switch

Test

Ref

XTAL1

-

+

VSS

VDD

VDDIO

CVREF

RLDINV

RLDIN

EMI
filter

IN2

EMI
filter

IN3

EMI
filter

IN4

EMI
filter

IN5

EMI
filter

IN6

Batt.
Mon

CMOUT

XTAL2

POR

RSTB

DRDYB

RLDREF

CLK

ALARMB

DIGITAL

CONTROL AND

POWER

MANAGEMENT

Wilson

ref.

CM

Detect

SYNCB

VSSIO

Digital

Filter

Σ∆

Modulator

Digital

Filter

Σ∆

Modulator

-

+

-

+

InA

InA

InA

WCT

-

+

CH4- Analog Pace

WILSON_EN

CMDET_EN

SELRLD

REF

EMI

filter

EMI

filter

LOD_EN

CH1-Pace

CH2-Pace

CH3-Pace

Digital

Filter

Σ∆

Modulator

REF for

CM & RLD

RLD

Amp.

PACE2

RLDIN

PACE2WCT

WILSON_CN

CH1

CH2

CH3

CH4 InA

Block Diagram

2.1.1 ADS1293

• Low current consumption:
– Duty-Cycle mode: 120 μA
– Normal mode: 415 μA

• Wide supply range: 2.3 V to 5.5 V

• Programmable gain: 1 V/V to 128 V/V

• Programmable data rates: Up to 2 kSPS

• 50-Hz and 60-Hz rejection at 20 SPS

• Low-noise PGA: 90 nV

• Dual matched programmable current sources: 10 μA to 1500 μA

• Internal temperature sensor: 0.5°C Error (max)

• Low-drift internal reference

• Low-drift internal oscillator

• Two differential or four single-ended inputs

• SPI™-compatible interface

• 3,5 mm × 3,5 mm × 0,9 mm QFN package

Figure 2. ADS1293 Block Diagram

at 20 SPS

RMS

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SFR bus SFR bus

MEMORY

ARBITRATOR

8051 CPU

CORE

DMA

FLASH

SRAM

FLASH CTRL

DEBUG

INTERFACE

RESET

RESET_N

P2_4

P2_3

P2_2

P2_1

P2_0

P1_4

P1_3

P1_2

P1_1

P1_0

P1_7

P1_6

P1_5

P0_4

P0_3

P0_2

P0_1

P0_0

P0_7

P0_6

P0_5

32.768 kHz

CRYSTAL OSC

32 MHz

CRYSTAL OSC

HIGH SPEED

RC-OSC

32 kHz

RC-OSC

CLOCK MUX &
CALIBRATION

RAM

USART 0

USART 1

TIMER 1 (16-bit)

TIMER 3 (8-bit)

TIMER 2

(BLE LL TIMER)

TIMER 4 (8-bit)

AES

ENCRYPTION

&

DECRYPTION

WATCHDOG TIMER

IRQ

CTRL

FLASH

UNIFIED

RF_P RF_N

SYNTH

MODULATOR

POWER ON RESET

BROWN OUT

RADIO

REGISTERS

POWER MGT. CONTROLLER

SLEEP TIMER

PDATA

XRAM

IRAM

SFR

XOSC_Q2

XOSC_Q1

DS ADC

AUDIO / DC

DIGITAL

ANALOG

MIXED

VDD (2.0 - 3.6 V)

DCOUPL

ON-CHIP VOLTAGE

REGULATOR

Link Layer Engine

FREQUENCY

SYNTHESIZER

I2C

DEMODULATOR

RECEIVE TRANSMIT

OP-AMP

ANALOG COMPARATOR

I/O CONTROLLER

1 KB SRAM

Radio Arbiter

FIFOCTRL

SDA

SCL

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2.1.2 CC2541

Block Diagram

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Figure 3. CC2541 Block Diagram

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Block Diagram

• RF
– 2.4-GHz Bluetooth low energy Compliant and Proprietary RF System-on-Chip
– Supports 250-kbps, 500-kbps, 1-Mbps, 2-Mbps Data Rates
– Excellent link budget, enabling long-range applications without external front end
– Programmable output power up to 0 dBm
– Excellent receiver sensitivity (–94 dBm at 1 Mbps), selectivity, and blocking performance
– Suitable for systems targeting compliance with worldwide radio frequency regulations: ETSI EN 300

• Layout
– Few external components
– Reference design provided
– 6-mm × 6-mm QFN-40 package
– Pin-compatible with CC2540 (when not using USB or I2C)

• Low Power
– Active-mode RX down to: 17.9 mA
– Active-mode TX (0 dBm): 18.2 mA
– Power mode 1 (4-µs wake-up): 270 µA
– Power mode 2 (sleep timer on): 1 µA
– Power mode 3 (external interrupts): 0.5 µA
– Wide Supply-voltage range (2 V–3.6 V)

• TPS62730 Compatible low power in active mode
– RX down to: 14.7 mA (3-V supply)
– TX (0 dBm): 14.3 mA (3-V supply)

• Microcontroller
– High-performance and low-power 8051 microcontroller core with code Prefetch
– In-system-programmable flash, 128- or 256-KB
– 8-KB RAM with retention in all power modes
– Hardware-debug support
– Extensive baseband automation, including auto-acknowledgment and address decoding
– Retention of all relevant registers in all power modes

• Peripherals
– Powerful five-channel DMA
– General-purpose timers (one 16-Bit, two 8-Bit)
– IR generation circuitry
– 32-kHz sleep timer with capture
– Accurate digital RSSI support
– Battery monitor and temperature sensor
– 12-Bit ADC with eight channels and configurable resolution
– AES security coprocessor
– Two powerful USARTs with support for several serial protocols
– 23 general-purpose I/O Pins (21 × 4 mA, 2 × 20 mA)
– I2C interface
– Two I/O pins have LED Driving capabilities
– Watchdog timer
– Integrated high-performance comparator

• Development Tools

www.ti.com

328 and EN 300 440 Class 2 (Europe), FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan)

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• Software Features

Block Diagram

– CC2541 evaluation module kit (CC2541EMK)
– CC2541 mini development kit (CC2541DK-MINI)
– SmartRF™ software
– IAR embedded Workbench™ available

– Bluetooth v4.0 compliant protocol stack for single-mode BLE solution

• Complete power-optimized stack, including controller and host

• GAP – central, peripheral, observer, or broadcaster (including combination roles)

• ATT / GATT – client and server

• SMP – AES-128 encryption and decryption

• L2CAP

• Sample applications and profiles

• Generic applications for GAP central and peripheral roles

• Proximity, accelerometer, simple keys, and battery GATT services

• More applications supported in BLE Software Stack

• Multiple configuration options

• Single-chip configuration, allowing applications to run on CC2541

• Network processor interface for applications running on an external microcontroller

• BTool – Windows PC application for evaluation, development, and test

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Current
Sensor

Gate

Driver

Device

Control

GND

EN

FB

VOUT

L

VREF

VIN

Device

Control

StartUp

VIN

VOUT

Block Diagram

2.1.3 TPS61220

• Up to 95% efficiency at typical operating conditions

• 5.5 μA quiescent current

• Startup into load at 0.7-V input voltage

• Operating input voltage from 0.7 V to 5.5 V

• Pass-through function during shutdown

• Minimum switching current 200 mA

• Protections:
– Output overvoltage
– Overtemperature
– Input undervoltage lockout

• Adjustable output voltage from 1.8 V to 6 V

• Fixed output voltage versions

• Small 6-pin SC-70 package

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Figure 4. TPS61220 Block Diagram

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V1

-

+

RLDINV

CMOUT

RLDOUT

DIGITAL

CONTROL AND

POWER

MANAGEMENT

Wilson

ref.

Digital

Filter

Σ∆

Modulator

Digital

Filter

Σ∆

Modulator

Digital

Filter

Σ∆

Modulator

-

+

-

+

InA

InA

InA

WCT

-

+

RA LA

LL

RL

IN1

IN2

IN3

IN4

IN5

IN6

R

1

R

2

C

1

I

II

V

SELRLD

WILSON_EN

CM

detect

CMDET_EN

-

+

RLD

Amp.

VSS

VDD

VDDIO

XTAL1

XTAL2

CVREF

5V

InA

CH1

CH2

CSB

SCLK

SDI

SDO

DRDYB

ALARMB

RLDIN

RLDREF

CH3

5V 5V

0.1 F

1

F

4.096
MHz

0.1 F

3.3V

0.1 F

22 pF 22 pF

CLK

VSSIO

SYNCB

1 MΩ

3.3V

REF for

CM & RLD

1 MΩ

RSTB

3.3V

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3 Theory of Operation

3.1 5-Lead ECG Application

Figure 5 shows the ADS1293 device in a 5-Lead ECG system setup. The ADS1293 device uses the

Common-Mode Detector to measure the common-mode of the patient’s body by averaging the voltage of
input pins IN1, IN2 and IN3, and uses this signal in the right leg drive feedback circuit.

NOTE: The ideal values of R1, R2and C1will vary per system/application; typical values for these

components are: R1= 100kΩ, R2= 1MΩ and C1= 1.5nF.

The output of the RLD amplifier is connected to the right leg electrode, which is IN4, to drive the common­mode of the patient’s body. The Wilson Central Terminal is generated by the ADS1293 and is used as a
reference to measure the chest electrode, V1. The chip uses an external 4.096MHz crystal oscillator
connected between the XTAL1 and XTAL2 pins to create the clock sources for the device.

Theory of Operation

CC2541 Communication

The CC2541 device communicates to the ADS1293 device through SPI interface. The CC2541 device
implements the application software to run this application through the 8051 microcontroller core in
addition to running the BLE stack. For additional information, see Section 4.4.

Figure 5. 5-Lead ECG Application

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Theory of Operation

3.2 Battery Life Calculation

For battery life calculations, TI highly recommends that the user reviews CC2541 Battery Life Calculation,

SWRA347.

Comparing the power consumption of a BLE device to another device using a single metric is impossible.
For example, a device gets rated by its peak current. While the peak current plays a part in the total power
consumption, a device running the BLE stack only consumes current at the peak level during
transmission. Even in very high throughput systems, a BLE device is transmitting for only a small
percentage of the total time that the device is connected (see Figure 6).

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Figure 6. Current Consumption

In addition to transmitting, there are other factors to consider when calculating battery life. A BLE device
can go through several other modes, such as receiving, sleeping, and waking up from sleep. Even if the
current consumption of a device in each different mode is known, there is not enough information to
determine the total power consumed by the device. Each layer of the BLE stack requires a certain amount
of processing to remain connected and to comply with the specifications of the protocol. The MCU takes
time to perform this processing, and during this time, current is consumed by the device. In addition, some
power might be consumed while the device switches between modes (see Figure 7). All of this must be
considered to get an accurate measurement of the total current consumed.

Figure 7. Current Consumption-Active versus Sleep Modes

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4 Getting Started

4.1 Software

Requirements:

• An iOS device: iPhone 4S and newer generations; iPad 3 and newer generations; fifth generation iPod
(www.Apple.com)

• 3.6-V Lithium-ion battery, recommended model BT-0001

• CC Debugger (http://www.ti.com/tool/cc-debugger)

4.1.1 Installing the Application

The application is not on iTunes (Apple Approved) for download. Download the application from the
following link: TIDA-00096 iOS Application Software .

Since the application is not on iTunes, use the steps below to install it manually. When the application is
distributed manually, there is a limit on how many devices can the application can be loaded on. The
UDID of each device needs to be provided before the application can be installed.

Use the following steps to install the Wireless Heart Rate Monitor application on a device.

1. Connect the iPhone or iPad to the PC.

2. Open the iTunes application on the PC.

3. Wait for iTunes to identify that the device is connected to the PC.

4. The serial number of the device is listed as shown in Figure 9.

Getting Started

Figure 8. 3.6-V Lithium-Ion Battery

5. In order to view the Identifier number (UDID), double click on Serial Number as shown in Figure 10

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Figure 9. Opening iTunes

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Getting Started

6. Report the identifier number (UDID) number to the iPad developer.

7. After the UDID is added to the application (by the iPad developer), a .zip file is sent to the iTunes user
that contains the application to download onto the smart device such as an iPhone4S®, iPhone 5®, or
iPad4®.

8. Unzip the folder to view the application, ecgmonitor.ipa.

9. Open iTunes

Once iTunes is open, use the following steps to install the application on the device.

1. Click the top-left button in the iTunes interface shown in Figure 11.

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Figure 10. Finding the UDID Number

2. Once the top-left button is clicked, a menu appears, click on Add File to Library (see Figure 12) to
navigate to and select the ecgmonitor.ipa file from the file directory.

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Figure 11. iTunes library

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Getting Started

Figure 12. Add File to Library

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Getting Started

3. Go to the iPad page and click on the Apps menu as shown in Figure 13.

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4. Click on Install and then click Apply. Next, click on Sync. Then finally click Done.

4.2 Hardware

Use to following steps to connect the Demo board.

1. Connect the battery (3.6 V nominal) to the P1 connector on the ADS1293BLE board.

2. Set the U2 switch to the ON position.

3. Uninstall J3.

4. Connect the ECG cable to the J1 connector on the ADS1293BLE board (see Figure 14).

5. Connect the five leads to either an ECG simulator or to five electrode pads attached to the body. On
the back of each lead is a label (RL, LL, LA, RA, and V1).

Figure 13. Installing the Application on the iOS Device

Figure 14. Hardware Setup

NOTE: For the SKX2000 simulators connect V1 to the C1 terminal. If using the SKX2000 simulator,

turn the simulator on and off by pressing the red button on the left side (see Figure 15).

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Getting Started

4.3 Running the Demo

• Open up the ADS1293 ECG monitor application on either an iPad or iPhone.

• Press the Start Scanning button as shown in Figure 17.

Figure 15. ECG Emulator

Figure 16. ECG Monitor Application

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Figure 17. Launch Application

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Getting Started

• After several moments, the ADS1293 ECG Demo START button and the Bluetooth symbol appear as
shown in Figure 18.

NOTE: If the Bluetooth symbol does not appear, close the application and repeat the steps listed in

• The three channel readings are now available on the screen. If the board and ECG simulator are
properly connected, the screen will appear similar to Figure 19 or Figure 20.

– Figure 19 appears when connected to SKX2000 ECG Simulator.

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Section 4.3. If the problem continues, see Section 5 below.

Figure 18. Enable Bluetooth on iOS Device

Figure 19. ECG Data Connected to the Simulator

– Figure 20 appears when connected to the body.

Figure 20. ECG Data Connected to the Body

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4.4 Firmware

This section describes the over-the-air protocol to be used in the Wireless Heart Rate Monitor Reference
Design. This section also provides an overview of the firmware development platform.

To download the software and firmware, go to TIDA-00096.

• iOS source code

• CC2541 BLE source code

4.4.1 Communication Overview

ECG data is sent as a burst of six BLE-notification packets every 14 ms. Each notification packet consists
of 20 bytes containing the following:

• ECG Sample1 (Raw ADC data)
– Channel1 (3 bytes)
– Channel2 (3 bytes)
– Channel3 (3 bytes)

• ECG Sample2 (Raw ADC data)
– Channel1 (3 bytes)
– Channel2 (3 bytes)
– Channel3 (3 bytes)

An ECG error or status packet is sent once every 17 ECG samples. ECG status packets contain the
following:

• 2-byte running counter

• Status packet begin indication: 0xFF, 0xFF, 0xFF

• 7-byte error status (ERROR_LOD, ERROR_STATUS, ERROR_RANGE1, ERROR_RANGE2,
ERROR_RANGE3, ERROR_SYNC, ERROR_MISC)

• Status packet end: 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF

Getting Started

4.4.2 ADS1293 ECG Demo: Complete Attribute Table

Figure 21 shows the complete attribute table for the ADS1293 ECG-Demo. Services are shown in yellow,

characteristics are shown in blue, and characteristic values and descriptors are shown in grey. The
ADS1293 ECG demo implements a BLE peripheral device. The Demo supports an ECG peripheral profile
based on the heart rate example of the CC254x Simple BLE Peripheral frame work.

When configured by a peer device, the ECG peripheral application sends notification of the ECG
measurement. On power up, advertising is enabled and the peer device must discover and initiate a
connection procedure to the ECG peripheral. When the peer device configures the ECG measurement for
notification, a timer starts and ECG measurements are sent periodically. In addition to ECG measurement,
the peer device can read the number of ECG channels supported (characteristic 2) and the number of
ECG-sample data sets per packet (characteristic 3).

The peer device may also discover and configure the battery service for battery level-state notifications.
This functionality is the same as supported in Simple BLE Peripheral framework.

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handle (he x) Type (hex ) Type Hex / Text Value (default)

GATT Server
Permissi ons

Notes

0x10 0x2800 GATT_PRIMARY_SERVICE_UUID 0x2D0D (ECG_SERV_UUID) GATT_PERMIT_READ

Start of ECG Profile

Service
10( properties: notify only)
12 00( handle: 0x0012)
37 2D (UUID: 0x2D37)

0x12 0x2D37 ECG_MEAS_UUID

00:00:00:00:00:00:00:00:00:00:00:00 (12
bytes)

(none) ECG data value

0x13 0x2902 GATT_CLIENT_CHAR_CFG_UUID 00:00 (2 bytes)

GATT_PERMIT_READ |

GATT_PERMIT_WRITE

Write "01:00" to enable

notifi cations. "00:00" to

disable

0x14 0x2901 GATT_CHAR_USER_DESC_UUID "ECG Measurement Data\0"(21 bytes) GATT_PERMIT_READ

Characteristic1 user

description
02( properties: read only)
16 00( handle: 0x0016)
38 2D (UUID: 0x2D38)

0x16 0x2D38 ECG_NUM_CHANS 03 (1 byte) GATT_PERMIT_READ

Number of ECG

Channels

0x17 0x2901 GATT_CHAR_USER_DESC_UUID "N umber of ECG Channels\0" (23by tes) GATT_PERMIT_READ

Characteristic3 user

description
02( properties: read only)
19 00( handle: 0x0019)
39 2D (UUID: 0x2D39)

0x19 0x2D39 ECG_SAMPLE_SETS 01 (1 byte) GATT_PERMIT_READ

Number of ECG Sample

Sets per packet

0x1A 0x2901 GATT_CHAR_USER_DESC_UUID

"ECGS ample Sets Per Packet\0" (27
bytes)

GATT_PERMIT_READ

Characteristic3 user

description
08 (properties: write onl y)
1C 00 (handle: 0x001C)
3A 2D (UUID: 0x2D3A)

0x1C 0x2D3A ECG_COMMAND 00 (1 byte) GATT_PERMIT_READ ECG command set

0x1B 0x2803 ECG_PROFILE_CHARACTER4_UUID GATT_PERMIT_WRITE

Characteristic4

declaration

0x15 0x2803 ECG_PROFILE_CHARACTER2_UUID GATT_PERMIT_READ

Characteristic2

declaration

0x18 0x2803 ECG_PROFILE_CHARACTER3_UUID GATT_PERMIT_READ

Characteristic3

declaration

ECG Peripheral Appli cation: Complete Attri bute Table

0x11 0x2803 ECG_PROFILE_CHARACTER1_UUID GATT_PERMIT_READ

Characteristic1

declaration

Getting Started

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Figure 21. ECG Peripheral Application: Complete Attribute Table

18

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ECG Sample1 Data

Running Counter

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4.4.3 ECG Notification Packet

Figure 22 shows an example of captured ECG notification packets.

Table 1 lists the ECG notification data consisting of 20 bytes and the format.

Getting Started

Figure 22. ECG Notification Packet

Table 1. ECG Notification Data Format

Byte Number Default Value Description

0 xxxx Running Counter – High byte
1 xxxx Running Counter – Low byte
2 0xD1 ECG Sample1: Channel 1 ADC High byte
3 0xD2 ECG Sample1: Channel 1 ADC Middle byte
4 0xD3 ECG Sample1: Channel 1 ADC Low byte
5 0xD4 ECG Sample1: Channel 2 ADC High byte
6 0xD5 ECG Sample1: Channel 2 ADC Middle byte
7 0xD6 ECG Sample1: Channel 2 ADC Low byte
8 0xD7 ECG Sample1: Channel 3 ADC High byte
9 0xD8 ECG Sample1: Channel 3 ADC Middle byte
10 0xD9 ECG Sample1: Channel 3 ADC Low byte
11 0xD1 ECG Sample2: Channel 1 ADC High byte
12 0xD2 ECG Sample2: Channel 1 ADC Middle byte
13 0xD3 ECG Sample2: Channel 1 ADC Low byte
14 0xD4 ECG Sample2: Channel 2 ADC High byte
15 0xD5 ECG Sample2: Channel 2 ADC Middle byte
16 0xD6 ECG Sample2: Channel 2 ADC Low byte
17 0xD7 ECG Sample2: Channel 3 ADC High byte
18 0xD8 ECG Sample2: Channel 3 ADC Middle byte
19 0xD9 ECG Sample2: Channel 3 ADC Low byte

(1)

The Allowed maximum size of notification packet is 20 bytes.

(1)

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Getting Started

4.4.4 Connection Setup

Bluetooth low-energy uses a 20-ms connection interval. Twenty user-data bytes (which is equal to 2­samples for each channel and 2-bytes running counter) are sent in GATT notifications. Data from
ADS1293 device is ping-pong buffered and up to six notifications are sent every 14 ms based on an OSAL
timer. The ADS1293 sample rate is set as 160 samples/sec (SPS) (see the ADS1293 data sheet,

SNAS602, for more information on R1 = 4, R2 = 5, and R3 = 32). Each sample is 3 bytes and is sending 3

channels.

Firmware Development Platform

One of the development platforms for the CC2541 8051 microcontroller is the IAR development platform.
For information on this platform, goto http://www.iar.com. To communicate to the development platform
through IAR, the CC Debugger is required as shown in Figure 23

The CC Debugger (shown in Figure 23) must be connected to the 10-pin header on the SAT0015 board.
Ensure the notch on the cable that connects to the 10-pin header is towards the outside. If connected
properly, the LED on the CC Debugger lights green.

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Figure 23. CC Debugger

Launch the IAR project workspace as shown in Figure 24.

Figure 24. Project Details.

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Ensure that the software is on version 8.20.1 or newer as shown in Figure 25.

Getting Started

Figure 25. Version Control

Figure 26 shows the main entry function.

Figure 26. Main Function

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Common Issues and Solutions

Figure 27 shows the various communication settings for the application.

Figure 28 shows that all of the key-configuration settings for the ADS1293 device are easily updated

through the single function.

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Figure 27. Key Parameters

5 Common Issues and Solutions

Issue —The iPad or iPhone will not connect to the demo through Bluetooth.

Solution: Ensure that the application is shut down completely before trying to reconnect. To shut

down the application, hold the home button on the iPad or iPhone until the task manager window
appears. This window shows all of the applications running in the background. Press and hold on
the ADS1293 application until the X or - symbol appears. Click the X or - to completely shut down
the application. Start again to reconnect the demo board. If the issue continues, see the following
solution on adjusting the input voltage from the battery.

22

Wireless Heart Rate Monitor Reference Design TIDU195A–January 2014–Revised July 2014

Figure 28. Key Configuration Settings

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0

500

1000

1500

2000

2500

3000

3500

-6

-4.2

-2.4

-0.6

1.2 3 4.8

6.6

8.4

10.2

12

Occurrences

Input-Referred Noise (µV)

C006

VDDIO = 3.3 V

-15

-10

-5

0

5

10

15

0 1 2 3 4 5 6 7 8 9 10

Input-Referred Noise (µV)

Time (s)

C004

VDDIO = 3.3 V

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6 Test Data and Simulation Results

6.1 Antenna Simulations

The following data was simulated using the High-Frequency Structural Simulator (HFSS) from ANSYS
(www.ansys.com).

The goal of the antenna simulations was to validate that the 2.45-GHz antenna performed as expected.

Test Data and Simulation Results

6.2 Noise Test Results

Figure 30 and Figure 31 show the input referred noise of the AFE.

Figure 29. Antenna Simulation

Figure 30. Input-Referred Noise

Figure 31. Noise Histogram

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-180

-160

-140

-120

-100

-80

-60

-40

-20

0

0 40 80 120 160 200 240

Amplitude (dBFS)

Frequency (Hz)

C007

Data Rate = 1067 SPS

ECG BW = 215 Hz

VDDIO = 3.3 V

-180

-160

-140

-120

-100

-80

-60

-40

-20

0

0 400 800 1200 1600 2000 2400

Amplitude (dBFS)

Frequency (Hz)

C008

Data Rate = 25.6k SPS

PACE BW = 2550 Hz

VDDIO = 3.3 V

Test Data and Simulation Results

6.3 FFT Results

Figure 32 and Figure 33 show the FFT results of the ADS1293 device corresponding to different peak

rates.

Figure 32. FFT Plot ECG Channel Figure 33. FFT Plot Pace Channel

(50-Hz Signal) (50-Hz Signal)

6.4 EMI Test Results of the ADS1293

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DUT Frequency MHz Vos_Off (uV) Vos_On (uV) Vrf_pp (mV) EMIRR

4L2 400 -4.94 -4.93 130.8 132.6231099
4L2 900 -4.82 -5 103.4 103.4341716
4L2 1800 -5.05 -4.98 90 109.2265398
4L2 2400 -4.95 -4.9 45.2 100.1849375
6L1 400 19.03 18.99 218.1 129.463827
6L1 900 19 18.97 225.6 132.5499389
6L1 1800 19 18.98 185.7 132.6906764
6L1 2400 19.01 18.99 41.9 106.8267612
11L1 400 -4.55 -4.36 204.1 114.7774483
11L1 900 -4.38 -4.26 204.8 118.8283733
11L1 1800 -4.39 -4.48 147.2 115.5902624
11L1 2400 -4.42 -4.37 47.73 101.1310575

24

Wireless Heart Rate Monitor Reference Design TIDU195A–January 2014–Revised July 2014

Table 2. Test Results

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Test Data and Simulation Results

Figure 34. Setup for ECG Data

Figure 35. ECG Data as Shown on an iOS Device

FCC Compliance

The Wireless Heart Rate Monitor Reference Design platform uses a similar RF design (antenna design)
that complied with the following standards:

• EN 300 328

• FCC 15.247

• IC RSS-210

• EN 301 489-17
FCC and IC Regulatory Compliance standards:
– FCC – Federal Communications Commission Part 15, Class A
– IC – Industry Canada ICES-003 Class A

See the Gas Sensor Platform Reference Design (SNOA922) for reference.

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V_Lithium

Li ION Battery (1s) UNIDEN 3.6V 720mA h 1 inchX2inch

VDD_3 = V_Lithium (if V_Lithium>3V) VDD_3 = 3V (if V_Lithium<3V)

V_Lithium

123

P1

0.47V

D2
SBR0220T5-7-F

0.1µF

C20

10µF

C22

47µF

C21

2

1

5

3

4

6

U2

EG1390B

VIN

1

FB

2

GND

3

VOUT

4

L

5

EN

6

U3

TPS61220DCK

VDD_3

1.00Meg

R16

200k

R17

10µF

C23

4.7µH

L5

EPL3015-472MLB

Schematics

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7 Schematics

Figure 36. Power Section

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VDD_3

VDD_3

VDD_3

VDD_3

22pF

C6

22pF

C31

VDD_3

VDD_3

VDD_3

CVREF

1µF

C3

MISO

MOSI

C

SS

DRDYB

ALARMB

1nF

C5

10k

R15

10.0Meg

R32

1.0Meg

R34

1.0Meg

R35

1.0Meg

R1

1.0Meg

R14

51

R2

51

R4

RSTB_1293

0.1µF

C4

0.1µF

C7

0.1µF

C1

0.1µF

C2

0

R36

0

R5

0

R6

0

R9

0

R11

0

R12

1

2

3

4

5

6

7

8

9

11

10

J1

1734348-1

CMOUT

RLDOUT

RLDIN

RLDINIV

WCT

CLK

V1

RL

LL

LA

RA

RA
LA

LL
RL
V1

1

2

4.096MHz

Y1

ECS-41-18-5PXEN-TR

IN1

1

IN2

2

IN3

3

IN4

4

IN5

5

IN6

6

WCT

7

CMOUT

8

RLDOUT

9

RLDINV

10

RLDIN

11

RLDREF

12

SYNCB

13

VSSIO

14

ALARMB

15

CSB

16

SCLK

17

SDI

18

SDO

19

DRDYB

20

CLK

21

VDDIO

22

XTAL1

23

XTAL2

24

RSTB

25

CVREF

26

VSS

27

VDD

28

PAD

U1

ADS1293CISQE/NOPB

1 2

S1

PTS635SL50LFS

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Schematics

Figure 37. Analog Front End

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VDD_3

VDD_FILT

SoC Debug/Flash

VDD_FILT

1

2

A3

ANTENNA IIFABLE

SS

C

MOSI

V_Lithium

SPI BUS TOADS1293

MISO

ALARMB

DRDYB

RSTB_1293

2.00Meg

R13

3.01Meg

R21

1
2

J3

0

R3

0

R18

0

R19

0

R37

0

R28

0

R30

0

R29

0

R20

0

R31

0

R26

0

R22

0

R25

0

R8

0

R40

2.21k

R24

2.74k

R10

0.1µF

C25

0.1µF

C26

0.1µF

C27

0.1µF

C28

0.1µF

C30

2.2µF

C8

220pF

C29

12pF

C17

12pF

C18

15pF

C14

15pF

C16

18pF

C11

18pF

C12

1pF

C9

1pF

C13

1µF

C24

1µF

C15

1000pF

C19

1293_RSTB

BLE_RST

RESET_N

P0_5/SCK

P0_4/SSN

P0_3/MISO

P0_2/MOSI

BLE_RST

P2_1/DD

1293_RSTB

P2_1/DD

P2_2/DC

PULSE_BEAT

PULSE_BEAT

56.2k

R23

0.4pF

C10

1000 ohm

FB1

5.1nH

L2

LQG15HH5N1S02D

2nH

L3
LQG15HS2N0S02D

2nH

L4

LQG15HS2N0S02D

1 2

32.768kHz

X1

ABS07-32.768KHZ-9-T

1

3 4

2

G

G

32MHz

X2

Q22FA1280009200

GND

1

SCL

2

SDA

3

NC

4

P1_5

5

P1_4

6

P1_3

7

P1_2

8

P1_1

9

DVDD2

10

P1_0

11

P0_7

12

P0_6

13

P0_5

14

P0_4

15

P0_3

16

P0_2

17

P0_1

18

P0_0

19

RESET_N

20

AVDD6

31

XOSC_Q1

22

XOSC_Q2

23

AVDD5

21

RF_P

25

RF_N

26

AVDD4

29

AVDD3

24

AVDD2

27

RBIAS

30

AVDD1

28

P2_4

32

P2_3

33

P2_2

34

P2_1

35

P2_0

36

P1_7

37

P1_6

38

DVDD1

39

DCOUPL

40

THERM_PAD

41

U4

CC2541RHA

1
2
3
4
5
6
7
8
9
10

J2

CONN_FTSH-105-01-L-DV

0

R7

P0_2/MOSI

P0_3/MISO

RESET_N

P0_5/SCK

P0_4/SSN

P2_2/DC

GND

2.2nH

L1

LQG15HS2N2S02D

Yellow

D1

1 2

S2

PTS635SL50LFS

Schematics

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Figure 38. ADS1293 Section

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Bill of Materials

8 Bill of Materials

To download the bill of materials (BOM) for each board, see the design files at TIDA-00096. Table 3 lists the BOM.

Table 3. BOM

Designator Quantity Value Description PackageReference PartNumber Manufacturer

!PCB 1 Printed Circuit Board SAT0015 Any
C1, C2, C4, C7 4 0.1 µF CAP,CERM, 0.1 µF, 25 V, ±5%, X7R, 0603 0603 06033C104JAT2A AVX
C3 1 1 µF CAP, CERM, 1 µF, 16 V, ±10%, X5R, 0805 0805 0805YD105KAT2A AVX
C5 1 1000 pF CAP, CERM, 1000 pF, 100 V, ±5%, C0G/NP0, 0603 C1608C0G2A102J TDK

0603
C6, C31 2 22pF CAP, CERM, 22 pF, 50 V, ±5%, C0G/NP0, 0603 0603 06035A220JAT2A AVX
C8 1 2.2 µF CAP, CERM, 2.2 µF, 6.3 V, ±20%, X5R, 0402 0402 JMK105BJ225MV-F Taiyo Yuden
C9, C13 2 1pF CAP, CERM, 1 pF, 50 V, ±5%, C0G/NP0, 0402 0402 GRM1555C1H1R0CA01D MuRata
C10 1 0.4pF CAP, CERM, 0.4 pF, 50 V, ±25%, C0G/NP0, 0402 GRM1555C1HR40BA01D MuRata

0402
C11, C12 2 18 pF CAP, CERM, 18 pF, 50 V, ±5%, C0G/NP0, 0402 0402 GRM1555C1H180JA01D MuRata
C14, C16 2 15 pF CAP, CERM, 15 pF, 50 V, ±5%, C0G/NP0, 0402 0402 GRM1555C1H150JA01D MuRata
C15, C24 2 1 µF CAP, CERM, 1 µF, 6.3 V,±20%, X5R, 0402 0402 C1005X5R0J105M TDK
C17, C18 2 12 pF CAP, CERM, 12 pF, 50 V, ±5%, C0G/NP0, 0402 0402 GRM1555C1H120JA01D MuRata
C19 1 1000pF CAP, CERM, 1000 pF, 50 V, ±5%, C0G/NP0, 0402 GRM1555C1H102JA01D MuRata

0402
C20, C25, C26, 6 0.1µF CAP, CERM, 0.1 µF, 10 V, ±10%, X7R, 0402 0402 GRM155R71A104KA01D MuRata

C27, C28, C30
C21 1 47µF CAP, CERM, 47 µF, 6.3 V, ±10%, X5R, 1206 1206 GRM31CR60J476KE19L MuRata
C22, C23 2 10 µF CAP, CERM, 10 µF, 6.3 V, ±20%, X5R, 0603 0603 GRM188R60J106ME47D MuRata
C29 1 220pF CAP, CERM, 220 pF, 50 V, ±5%, C0G/NP0, 0402 0402 GRM1555C1H221JA01D MuRata
D1 1 Yellow LED, Yellow, SMD Yellow LED SML-P12YTT86 RΩ
D2 1 0.47V Diode, Schottky, 20 V, 0.2 A, SOD-523 SOD-523 SBR0220T5-7-F Diodes Inc.
FB1 1 1000Ω 0.25A Ferrite Bead, 1000 Ω at 100 MHz, SMD 0402 BLM15HG102SN1D MuRata
J1 1 Conn D-SUB RCPT R/A 9POS GOLD/FL, TH D-SUB 9 PIN 1734348-1 TE Connectivity
J2 1 FTSH-105-01- Header, 2 × 5 pin 50 mil spacing 0.222 × 0.330 inch FTSH-105-01-L-DV Samtec

L-DV

J3 1 Header, TH, 100mil, 2 × 1, Gold plated, 230 mil TSW-102-07-G-S TSW-102-07-G-S Samtec, Inc.

above insulator
L1 1 2.2nH Inductor, Multilayer, Air Core, 2.2 nH, 0.3 A, 0.12 0402 polarized LQG15HS2N2S02D MuRata

Ω, SMD
L2 1 5.1nH Inductor, Multilayer, Ferrite, 5.1 nH, 0.3 A, 0.2 Ω, 0402 LQG15HH5N1S02D MuRata

SMD

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Bill of Materials

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Table 3. BOM (continued)

Designator Quantity Value Description PackageReference PartNumber Manufacturer

L3, L4 2 2nH Inductor, Multilayer, Ferrite, 2 nH, 0.3 A, 0.1 Ω, 0402 LQG15HS2N0S02D MuRata

SMD
L5 1 4.7uH Inductor, Shielded, Ferrite, 4.7 µH, 1.2 A, 0.14 Ω, Inductor, 3 × 1,55 × EPL3015-472MLB Coilcraft

SMD 3 mm
P1 1 Header, 3-Pin, Right Angle 0530480310 Molex
R1, R14, R34, R35 4 1.0Meg RES, 1 MΩ, 5%, 0.063 W, 0402 0402 CRCW04021M00JNED Vishay-Dale
R2, R4 2 51 RES, 51 Ω, 5%, 0.063 W, 0402 0402 CRCW040251R0JNED Vishay-Dale
R3, R5, R6, R7, 21 0 RES, 0 Ω, 5%, 0.063 W, 0402 0402 CRCW04020000Z0ED Vishay-Dale

R8, R9, R11, R12,
R18, R19, R20,
R22, R25, R26,
R28, R29, R30,
R31, R36, R37,
R40

R10 1 2.74k RES, 2.74 kΩ, 1%, 0.063 W, 0402 0402 CRCW04022K74FKED Vishay-Dale
R13 1 2Meg RES, 2 MΩ, 1%, 0.063 W, 0402 0402 CRCW04022M00FKED Vishay-Dale
R15 1 10k RES, 10 kΩ, 5%, 0.063 W, 0402 0402 CRCW040210K0JNED Vishay-Dale
R16 1 1Meg RES, 1 MΩ, 1%, 0.063 W, 0402 0402 CRCW04021M00FKED Vishay-Dale
R17 1 200k RES, 200 kΩ, 1%, 0.063 W, 0402 0402 CRCW0402200KFKED Vishay-Dale
R21 1 3.01Meg RES, 3.01 MΩ, 1%, 0.063 W, 0402 0402 CRCW04023M01FKED Vishay-Dale
R23 1 56.2k RES, 56.2k Ω, 1%, 0.063 W, 0402 0402 CRCW040256K2FKED Vishay-Dale
R24 1 2.21k RES, 2.21k Ω, 1%, 0.063 W, 0402 0402 CRCW04022K21FKED Vishay-Dale
R32 1 10Meg RES, 10 MΩ, 1%, 0.063 W, 0402 0402 CRCW040210M0FKED Vishay-Dale
S1, S2 2 Switch, tactile, SPST-NO, 0.05 A, 12V, TH SW, SPST 3,5 × 5 PTS635SL50LFS C&K Components

mm

U1 1 ADS1293 low power, 3-channel, 24-bit analog RSG0028A ADS1293CISQE/NOPB Texas Instruments

front-end for Biopotential measurements,

RSG0028A
U2 1 Slide switch DPDT 0.3 A, SMT 7,2 × 3,5 × 3,5 mm EG1390B E-Switch
U3 1 Low input voltage step-up converter in 6-pin SC- DCK0006A TPS61220DCK Texas Instruments

70 package, DCK0006A
U4 1 2.4-GHz Bluetooth low energy and proprietary RHA0040H CC2541RHA Texas Instruments

System-on-Chip, RHA0040H
X1 1 CRYSTAL, 32.768 KHZ, 9 pF, SMD 3,2 × 0.9 × 1,5 mm ABS07-32.768KHZ-9-T Abracon Corportation
X2 1 Crystal, 32 MHz, 10 pF, SMD Crystal, 2,6 × 0,5 × Q22FA1280009200 Epson

1,6 mm

Y1 1 Crystal, 4.096 MHz, 18 pF, SMD Crystal, 11,4 × 4,3 × ECS-41-18-5PXEN-TR ECS, Inc.

3,8 mm

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9 Layer Plots

To download the layer plots for each board, see the design files at TIDA-00096. Figure 39 shows the layer
plots.

Layer Plots

Figure 0. UNDEFINED

Figure 0. UNDEFINED Figure 0. UNDEFINED

Figure 0. UNDEFINED

Figure 0. UNDEFINED

Figure 0. UNDEFINED

Figure 39. Layer Plot

Figure 0. UNDEFINED

TIDU195A–January 2014–Revised July 2014 Wireless Heart Rate Monitor Reference Design

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Figure 0. UNDEFINED

31

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Altium Project

10 Altium Project

To download the Altium project files for each board, see the design files at TIDA-00096. Figure 40,

Figure 41, Figure 42, and Figure 43 show the layout.

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Figure 40. All Layers

Figure 42. Ground Layer

Figure 41. Bottom Layer

Figure 43. Top Layer

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Gerber Files

11 Gerber Files

To download the Gerber files for each board, see the design files at TIDA-00096.

Figure 44. Fab Drawing

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Software Files

12 Software Files

To download the software files for the reference design, see the design files at TIDA-00096.

References

For additional references, please see the following:

1. Bluetooth Low Energy CC2540 Mini Development Kit User’s Guide, SWRU270

13 About the Author

AJINDER PAL SINGH is a Systems Architect at Texas Instruments where he is responsible for

developing reference design solutions for the industrial segment. Ajinder brings to this role his extensive
experience in high-speed digital, low-noise analog and RF system-level design expertise. Ajinder earned
his Master of Science in Electrical Engineering (MSEE) from Texas Tech University in Lubbock, TX.
Ajinder is a member of the Institute of Electrical and Electronics Engineers (IEEE).

NATARAJAN VISWANATHAN, also known as Vishy, is an Applications Engineer at Texas Instruments
Silicon Valley Analog where he is involved in developing embedded firmware, evaluation tools, and
customer demo systems. Vishy has broad experience with system on chips, microcontrollers, and
application processors. Vishy earned his Masters and PhD from the Indian Institute of Science, Bangalore.

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Revision History

Revision History

Changes from Original (January 2014) to A Revision .................................................................................................... Page

• Changed to the correct name for the design........................................................................................... 3

• Added paragraph explaining that installation of application is manual, but the designer must still connect to iTunes to

install the application. ................................................................................................................... 11

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TIDU195A–January 2014–Revised July 2014 Revision History

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Copyright © 2014, Texas Instruments Incorporated

STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES

1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or
documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein.
Acceptance of the EVM is expressly subject to the following terms and conditions.

1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software

1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.

2 Limited Warranty and Related Remedies/Disclaimers:

2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software
License Agreement.

2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment
by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any
way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or
instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as
mandated by government requirements. TI does not test all parameters of each EVM.

2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM,
or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the
warranty period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to
repair or replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall
be warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.

3 Regulatory Notices:

3.1 United States

3.1.1 Notice applicable to EVMs not FCC-Approved:

This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit
to determine whether to incorporate such items in a finished product and software developers to write software applications for
use with the end product. This kit is not a finished product and when assembled may not be resold or otherwise marketed unless
all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause
harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is
designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of
an FCC license holder or must secure an experimental authorization under part 5 of this chapter.

3.1.2 For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:

CAUTION

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.

FCC Interference Statement for Class A EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.

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FCC Interference Statement for Class B EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

3.2 Canada

3.2.1 For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210

Concerning EVMs Including Radio Transmitters:

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.

Concernant les EVMs avec appareils radio:

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Concerning EVMs Including Detachable Antennas:

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
for use with this device.

Concernant les EVMs avec antennes détachables

Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur

3.3 Japan

3.3.1 Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に

輸入される評価用キット、ボードについては、次のところをご覧ください。

http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

3.3.2 Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan are NOT certified by
TI as conforming to Technical Regulations of Radio Law of Japan.

If User uses EVMs in Japan, User is required by Radio Law of Japan to follow the instructions below with respect to EVMs:

1. Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,

2. Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or

3. Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.

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【無線電波を送信する製品の開発キットをお使いになる際の注意事項】
本開発キットは技術基準適合証明を受けておりません。
本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。

1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用
いただく。

2. 実験局の免許を取得後ご使用いただく。

3. 技術基準適合証明を取得後ご使用いただく。

なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。

上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。
日本テキサス・インスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル

3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page

電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ

い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page

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4 EVM Use Restrictions and Warnings:

4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT
LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.

4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling
or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.

4.3 Safety-Related Warnings and Restrictions:

4.3.1 User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any
load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.
During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit
components may have elevated case temperatures. These components include but are not limited to linear regulators,
switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.

4.3.2 EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.

4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,
state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.

5. Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate
as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.

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6. Disclaimers:

6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE
DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY
THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.

6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND
CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY
OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD
PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY
INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF
THE EVM.

7. USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS
LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION
SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY
OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

8. Limitations on Damages and Liability:

8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,
INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED
TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS,
LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL
BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED.

8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION
ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM
PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER
THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE
OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND
CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.

9. Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)
will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
excluding any postage or packaging costs.

10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,
without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief
in any United States or foreign court.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

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Copyright © 2014, Texas Instruments Incorporated

IMPORTANT NOTICE FOR TI REFERENCE DESIGNS

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TI reference designs have been created using standard laboratory conditions and engineering practices. TI has not conducted any
testing other than that specifically described in the published documentation for a particular reference design. TI may make
corrections, enhancements, improvements and other changes to its reference designs.

Buyers are authorized to use TI reference designs with the TI component(s) identified in each particular reference design and to modify the
reference design in the development of their end products. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL
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Information published by TI regarding third-party products or services does not constitute a license to use such products or services, or a
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Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2014, Texas Instruments Incorporated