Rainbow Electronics RAM01 User Manual

RAM01

RAM01 ISM Band OOK Receiver Module

Version: 1.0 Date: 10/11/2008

DESCRIPTION

HopeRF’s RAM01 is a highly-integrated, low power, multi-channel OOK receiver module designed for use in
applications requiring FCC or ETSI conformance for unlicensed use in the 433, 868 and 915 MHz bands. Used in
conjunction with HopeRF’s transmitters, the RAM01 is a flexible, low cost, and highly integrated solution that does
not require production alignments. All required RF functions are integrated.

The RAM01 has a completely integrated PLL for easy RF design, and its rapid settling time allows for fast frequency
hopping, bypassing multipath fading, and interference to achieve robust wireless links. The PLL’s high resolution
allows the usage of multiple channels in any of the bands. The baseband bandwidth (BW) is programmable to
accommodate various deviations, data rate. The module employs the low-IF approach; therefore, no external
components are needed in a typical application. The RAM01 is a complete analog RF and baseband receiver,
including a multi-band PLL synthesizer with an LNA, down converter mixers, baseband filters and amplifiers, and
demodulator.

The module support Stand alone mode, that means it can receive data without MCU configuration. This mode
mainly simplify the customer application complexity and can be replace traditional super- regenerative receiver and
super-heterodyne receiver.
but frequency can be selected.

for more details about RAM01, please see RA01’s datasheet from http://www.hoperf.com

FEATURES

• Fully integrated receiver module

• No alignment required in production

• Fast settling, programmable, high-resolution PLL

• Fast frequency hopping capability

• Programmable bit rate (up to 40 kbps)

• 50 ohm single-ended antenna input

• Programmable baseband bandwidth (85 to 340 kHz)

• Data filtering and clock recovery

• RX pattern recognition

• SPI compatible serial control interface

• Readable registers

• Clock and reset signals for microcontroller

• 64 bit RX data FIFO

• Accurate Wake-up timer

• Low battery detector

• 2.2 to 3.8 V supply voltage

• Low power consumption

• Low standby current (typ. 0.2 μA)

TYPICAL APPLICATIONS

• Remote control

• Home security and alarm

• Wireless keyboard/mouse and other PC peripherals

• Toy control

• Remote keyless entry

• Tire pressure monitoring

• Telemetry

• Personal/patient data logging

• Remote automatic meter reading

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1

RAM01

Over view and Pin out

Version: 1.0 Date: 10/11/2008

RAM01-D

Pin number Name Type Function

1 VDD P Power supply
2 DATA DO Demodulated data output

3, 5 GND P Ground

4 ENABLE DI Receiving control(active high)
6 ANT AI 50 ohm antenna input

RAM01-S1 RAM01-S2

Pin number Name Type Function

1 OP0 DI
2 OP1 DI
3 DATA DO
4 DFILC AO Data filter capacitor connection
5 CLK DO Divide clock output
6 DUTY DI Duty-cycle mode receiving enable.

7, 10, 11 GND P

8 ANT AI

9 VDD P
12 FR0 DI
13 FR1 DI
14 FR2 DI

Operation frequency band selection pins

Demodulated data output

Ground
50 ohm antenna input
Power supply

Operation frequency selection pins

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RAM01

GENERAL DEVICE SPECIFICATIONS

All voltages are referenced to Vss, the potential on the ground reference pin VSS.

Absolute Maximum Ratings (non-operating)

Symbol Parameter Min Max Units
Vdd Positive supply voltage -0.5 6.0 V
Vin Voltage on any pad -0.5 Vdd+0.5 V
Iin Input current into any pad except VDD and VSS 25 25 mA
ESD Electrostatic discharge with human body model

Tst Storage temperature 55 125
Tld Lead temperature (soldering, max 10 s)

Recommended Operating Range

Symbol Parameter Min Max Units
Vdd Positive supply voltage 2.2 3.8 V
Top Ambient operating temperature 40 +85

ELECTRICAL SPECIFICATION

(Min/max values are valid over the whole recommended operating range, typical conditions: Top = 27 oC; Vdd = Voc =

2.7 V)

DC Characteristics

Symbol Parameter Conditions/Notes Min Typ Max Units
Idd Supply current all bands

Ipd Standby current all blocks disabled
Ilb Low battery voltage detector and

Ix Idle current crystal oscillator is ON
Vlb Low battery detection threshold programmable in 0.1 V steps 2.0 3.5 V

Vlba Low battery detection accuracy ± 2.5 %
VPOR Vdd threshold required

VPOR,hys POR hysteresis larger glithches on the Vdd

SRVdd Vdd slew rate for proper POR generation 0.1 V/ms
Vil Digital input low level 0.3*Vdd V
Vih Digital input high level 0.7*Vdd V
Iil Digital input current Vil = 0 V -1 1 μA
Iih Digital input current Vih = Vdd, Vdd = 3.8 V -1 1 μA
Vol Digital output low level Iol = 2 mA 0.4 V
Voh Digital output high level Ioh = -2 mA Vdd-0.4 V

AC Characteristics

Symbol Parameter Conditions/Notes Min Typ Max Units
fLO Receiver frequency 433 MHz band, 10 kHz resolution

BW Baseband fitler bandwidth mode 1

BRNRZ OOK bit rate with internal digital filters, NRZ data 4.8 40 kbps
BRM OOK bit rate with internal digital filters,

Pmin Receiver sensitivity BER 3* 10-3, BW = 85 kHz, PN9, -110 dBm

wake-up timer current

to generate a POR

1.5 V

generate a POR even above
the threshold V

868 MHz band, 20 kHz resolution
915 MHz band, 20 kHz resolution

mode 2
mode 3
mode 4
mode 5

manchester coded data

POR

Version: 1.0 Date: 10/11/2008

0.6 V

400.96

801.92

881.92
75

125
180
235
305

2.4 20 kbps

1000 V

260

9.6 12 mA

0.2
4

0.5

85
140
200
260
340

439.03

878.06

930.00
95

155
220
295
375

o

C

o

C

o

C

μA
μA

mA

MHz

kHz

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RAM01

BR = 9.6 kbps, Average signal
power

IIP3outh Input IP3 out of band interferers

CCR Co-channel rejection BER = 10-2 with continuous wave

BR100kHz Blocking ratio BER = 10-2 with continuous wave

BR1MHz Blocking ratio same as above,

BR10MHz Blocking ratio same as above,

Pmaxh Maximum input power LNA: high setting

Pmaxa Maximum input power LNA: automatic or low gain setting

Rin RF input impedance real

Cin RF input capacitance 460 fF
RSa RSSI accuracy +/-7 dB
RSr RSSI range With automatic 32 dB LNA gain

RSresp DRSSI response time Until the RSSI output goes high

fref PLL reference frequency (Note 2)
fresLB PLL frequency resolution 434 MHz Band 10 kHz

fresHB PLL frequency resolution 868 MHz or 915 MHz Band 20 kHz
Tsettl PLL settling time Frequency error < 1 kHz

tst1, P PLL startup time Initial calibration after power-up with

Pspur Spurious emission -60 dBm
Cxl Crystal load capacitance,

tPOR Internal POR pulse width

tsx Crystal oscillator startup

tPBt Wake-up timer clock period Calibrated every 30 seconds (Note

twake-up Programmable wake-up

Cin, D Digital input capacitance 2 pF
tr, f Digital output rise/fall time 15 pF pure capacitive load 10 ns
tr, f ,ckout Clock output rise/fall time 10 pF pure capacitive load 15 ns
fckout, slow Slow clock frequency Tolerance +/- 1 kHz 32 kHz

part (differential) (Note 1)

see crystal selection guide

(Note 3)

time

time

Note 1: See matching circuit parameters and antenna design guide for information, and Application Notes available
from http://www.hoperf.com.
Note 2: Using other than a 10 MHz crystal is not recommended because the crystal referred timing and frequency
parameters will change accordingly.
Note 3: During this period, commands are not accepted by the chip.
Note 4: Autocalibration can be turned off.

f-f

LO > 5MHz

interferer in the channel

interferer, BW = 85 kHz,
interferer offset 100 kHz

interferer offset 1 MHz

interferer offset 10 MHz

min 99.99% OOK modulation

min 99.9% OOK modulation
250 Ohm

switch

after the input signal exceeds the
preprogrammed
limit, C

ARRSI = 5nF

after 1 MHz step

running crystal oscillator

Programmable in 0.5 pF steps,
tolerance +/- 10%

After Vdd has reached 90% of final
value

Crystal ESR < 30 Ω 5 ms

4)
1

Version: 1.0 Date: 10/11/2008

-18 dBm

-4 dB

45 dB

50 dB

67 dB

-15 dBm

0 dBm

90 dB

500 μs

30 μs

500 μs

8.5

50 100 ms

0.995 1 1.005 ms

10

16 pF

8.4*10

MHz

6

ms

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4

RAM01

Application example

a. 4 key single channel remote controller

Version: 1.0 Date: 10/11/2008

Note: This type of RAM01 is use to replace traditional ASK receiver, no any modification of
customer software and hardware. It is a pin-to-pin compliance solution.

b. 8 channel remote controller

Note: This type of RAM01 is designed for more flexible applications witch requiring receiving data
from multi-transmitters, these transmitters send data at different frequency channels. Frequency
channel selection can be done by MCU software or hardware jumpers.

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5

RAM01

Mechanical information

Version: 1.0 Date: 10/11/2008

RAM01-D

RAM01-S1

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6

RAM01

RAM01-S2

Ordering information

Part number Package type Frequency band Note

RAM01-433D 433MHz
RAM01-868D 868MHz

RAM01-915D
RAM01-433S1 433MHz
RAM01-868S1 868MHz
RAM01-915S1
RAM01-433S2 433MHz
RAM01-868S2 868MHz
RAM01-915S2

HOPE MICROELECTRONICS CO.,LTD

Address: 4/F, Block B3, East Industrial Area,
Huaqiaochen, Shenzhen, Guangdong, China.
518052

Tel: [phone]
Fax: [phone]

Email: [e-mail]

[e-mail]

Website: http://www.hoperf.com
http://www.hoperf.cn

http://hoperf.en.alibaba.com

DIP

SMD

Thin SMD

915MHz

915MHz

915MHz

This document may contain preliminary information and is subject to

change by Hope Microelectronics without notice. Hope
Microelectronics assumes no responsibility or liability for any use of

the information contained herein. Nothing in this document shall
operate as an express or implied license or indemnity under the

intellectual property rights of Hope Microelectronics or third parties.
The products described in this document are not intended for use in

implantation or other direct life support applications where malfunction
may result in the direct physical harm or injury to persons. NO

WARRANTIES OF ANY KIND, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MECHANTABILITY OR FITNESS

FOR A ARTICULAR PURPOSE, ARE OFFERED IN THIS
DOCUMENT.

©2008, HOPE MICROELECTRONICS CO.,LTD. All rights reserved.

Version: 1.0 Date: 10/11/2008

Operation frequency channel
should be clarified when
ordering

Operation frequency channel
can be selected by customer

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7