ON Semiconductor NCD9830GEVB User Manual

NCD9830GEVB

NCD9830 Evaluation Board
User's Manual

About This Manual

This manual will enable the user to use NCD9830
Evaluation Board to evaluate functional performance of
NCD9830. A TSSOP−16 socket is available on the board to
avoid the hassle of soldering the device. NCD9830 is tested
by using a digital interface cable along with the supported
software. The test results should be taken to judge the device
functional performance according the specification in the
technical datasheet.

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EVAL BOARD USER’S MANUAL

NCD9830 Product Information

The NCD9830 is a classic successive approximation
analog to digital converter with 8 bit resolution and an
internal 8 channel multiplexer. The converter contains
a capacitive DAC that eliminates the need of a separate
sample and hold circuit. The device has the capabilty to
generate an internal reference voltage for the built-in DAC.
Fast conversion time, low power dissipation and low noise
makes this device ideal for applications like sensors data
acquisition, battery monitoring, remote actuator interface
and gaming consoles/modules and telecommunications.
Communication with the NCD9830 is accomplished via the

2

I

C interface which is compatible with industry standard

© Semiconductor Components Industries, LLC, 2014

October, 2014 − Rev. 0

Figure 1. NCD9830 Evaluation Board

protocols. The NCD9830 is available in a 16 lead TSSOP
package.

Features

• 8 Bit Resolution with Internal 8 channel Multiplexer

• Low Power Operation with Guaranteed Low Noise

SNR

• No Missing Codes and Fast Conversion Time

• Internally Generated Clock and Reference Voltage

• Operational Supply Voltage from 2.7 to 5.5 V

• Meets I

2

C Standard, Fast and High Speed Operation

• Full ROHS Compliant

1 Publication Order Number:

EVBUM2270/D

NCD9830GEVB

CH0
CH1
CH2
CH3

CH4
CH5
CH6
CH7

COM

A1

NCD9830

1
2
3

4
5
6
7
8

11

V

DD

Analog

MUX

GND

8-bit

A-to-D

Converter

1016 9

REFIN/REFOUT

Data Storage

A0

I

Temporary

2

C Interface

SDA SCL

14151213

2.5 V Ref

Figure 2. Block Diagram of NCD9830

HOW TO USE THIS MANUAL

Analog Interface

Two 8 way terminal blocks J1 & J2 are provided for
analog channels. They provide access to the analog input

Table 1. PIN CONFIGURATION OF J1 & J2

Pin Number Signal Notes

J1.1−J1.7 (Odd) CH0−CH3

J1.2−J1.8 (Even) GND Each Channel has Individual Ground

J2.1−J2.7 (Odd) CH4−CH7

J2.2−J2.8 (Even) GND Each Channel has Individual Ground

The analog inputs can be applied to J1 & J2 odd pins
e.g. J1.1 for CH0, J2.3 for CH5 and so on according to the
table above (Each channel name is marked explicitly on the
PCB). Even pins from J1.2−J1.8 & J2.2−J2.8 can be used as
ground for individual input channels.

Reference Voltage

The NCD9830 internal DAC can be configured with an
externally supplied (50 mV to 5 V) reference or an
internally generated reference voltage of 2.5 V. However, t o

pins of the ADC. The pin configurations of J1&J2 are
explained in Table 1.

avail of the full dynamic range an external reference of 5 V
must be used while operating the device at 5 V supply
voltage. The internal 2.5 V reference voltage is sufficient for
full dynamic range while operating the device at 2.7 V.

Jumper J5 is provided to switch external reference
ON/OFF. An inserted jumper corresponds to ON position
while it’s OFF otherwise. A 4 way terminal block J3 is
provided to supply external supply voltage (when a supply
voltage other than 3.3 V is used) and external reference
voltage. The pin configuration of J3 is explained in Table 2.

Table 2. PIN CONFIGURATION OF J3

Pin Number Signal Notes

J3.1 External Supply
J3.3 External Reference

J3.2 & J3.4 GND Individual Ground Provided for Easy Access

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NCD9830GEVB

Power Supply

NCD9830 can be operated at supply voltage range
between 2.7V & 5V. The liberty of supply voltage variation
must be used with appropriate reference voltage selection
(see technical datasheet for more information). Link LK2 is
provided for appropriate supply voltage setting. Position B
corresponds to default value of 3.3V (internally generated)
while position A corresponds to externally supplied supply
voltage. The Board generates 3.3 V from the USB connector
provided. However, if any other operating voltage is
required then that must be supplied externally through J3.1

Table 3. LINKS POSITIONS SELECTION

Selection

3.3 V Supply Voltage with Internal Reference B A A OFF

3.3 V Supply Voltage with External Reference B A A ON
Externally Supplied Voltage with Internal Reference A B B OFF
Externally Supplied Voltage with External Reference A B B ON

and J3.3 as explained in Table 2. The digital interface of the
PCB is operated at 3.3 V. If NCD9830 supply voltage is
selected any value other than 3.3 V then appropriate
management of SCL and SDA signals is required to allow
proper I

2

C operation. Links LK4 & LK5 serve this purpose.
Position A corresponds to 3.3 V operation (default)
whereas, position B corresponds to all other externally
supplied voltages according to the technical datasheet.
A guide to proper selection of Links and jumper is shown in
Table 3.

Links Positions

LK2 LK4 LK5 J5

LK2

J5

LK4 & LK5

Figure 3. Photograph of PCB Side Showing J5, LK2, LK4 & LK5

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NCD9830GEVB

Address Selection

Links LK1 & LK3 are provided for appropriate address
selection as explained in the technical data sheet. LK1
corresponds to A0 while LK3 corresponds to A1. Position A

Table 4. APPROPRIATE ADDRESS SELECTION

Address Selection

0x48 A A
0x49 A B
0x4A B A
0x4B B B

LK1 & LK3 for A0A1 Selection

corresponds to 0 (GND) while position B corresponds to 1
(VDD). The default position of these links is A0A1 = 00
which gives a hexadecimal address of 0x48.

Links Positions

LK1 LK3

Figure 4. Photograph of PCB Side Showing LK1 & LK3 (A0A1)

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NCD9830GEVB

Digital Interface & Software

A USB cable is provided to interface the NCD9830 board
to computer. A software file NCD9830_REV5.exe along
with its associated .hex file is also provided. Save the .exe

This small green square shows that firmware is
downloaded successfully. If it is red check USB
connection and address settings.

file and the .hex file in the same folder for proper interfacing
of the device with the software. Double click the
NCD9830_REV5.exe file and the user graphical interface
window will open as shown in Figure 5 below.

Figure 5. Graphical User Interface

Select “Measurement mode”, and “channel Select”
appropriately from drop down menu. The power mode
needs to b e a t “Int Ref On, ADC On” to allow operation with

internal reference. Check Enable Averaging for a better
averaged result of the output. Check Enable Graphing to see
the output value graphically as shown below in Figure 6.

Figure 6. Graphical User Interface Showing a Sample CH0 Output Value

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NCD9830GEVB

EVALUATION BOARD SCHEMATIC

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NCD9830GEVB

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NCD9830GEVB

P

al

Table 5. BILL OF MATERIALS

Qty

1 Y1 Crystal SMD 24 MHz Abracorn Cooperation
1 U6 SN74LVC3G07DCTR Triple Buffer
1 U5 USB Microcontroller (CY7C68013A−56LTXC)
1 U1 NCD9830, 8 bit A/D Converter
1 U3 24LC64 64K I2C Serial EEPROM
1 U2 3.3 V Regulator NCP5501
1 U4 TSSOP16 Socket
5 T1, T3, T8, T10, T11 TERMINAL, PCB, BLACK, PK100 VERO
2 SCL−VDD, SDA−VDD TERMINAL, PCB, YELLOW, PK 100 VERO
6 T2, T4−7, T9 TERMINAL, PCB, RED, PK100 VERO
8 R0−4, R7−9, R16 Resistor 0R, 0603, 0.1W, 1%, CRCW06030000Z0EA Vishay
7 R11−13, R17−20
1 R16 Resistor 0R, 0603, 63 mW, 5%, Multicomp
1 R33
3 R5, R10, R14
2 R6, R15
1 J5 HEADER, 1ROW, 2WAY & JUMPER 2 PIN PCB
5 LK1−5 HEADER, 1ROW, 3WAY & JUMPER 2 PIN PCB
5 J1−3 TERMINAL BLOCK. PCB, 3.81MM, 4WAY Phoenix Contact
1 J4 USB Mini-B Receptacle Molex
1 J6 TERMINAL BLOCK, PCB, 3.81MM, 3WAY Phoenix Contact
1 D7 LED SMD GREEN OSRAM
1 D22 DIODE, SCHOTTKY, SOT−23

12 C1, C12, C17−18, C22−29 NOT POPULATED (Customer Selection)

4 C2, C11, C14, C31
2 C3−4 CAP 22 pF, 50 V, SMD Ceramic Capacitor Yageo

14 C5−7, C10, C13, C15−16,

1 C8

Reference Description

Resistor 3.3kW, 0603, 63 mW, 5%, Multicomp

Resistor 1kW, 0805, 100 mW, 1%, Multicomp
Resistor 10kW, 0603, 0.125 W, 1%, Multicomp
Resistor 100kW, 0603, 0.125, 1%, Multicomp

CAP 10 mF, 10 V SMD Tantalum Capacitor

CAPACITOR, 0603, 0.1 mF, 25V Multicomp

C19−21, C30, C32−34

CAP 2.2 mF, 10 V SMD Tantalum Capacitor

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specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets

and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each

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