CONFIDENTIAL Datasheet for RDM-A4FZ P a g e | 1

Technical Datasheet

for

RDM-A4FZ

RF Transceiver Module in 433 MHz

CONFIDENTIAL Datasheet for RDM-A4FZ P a g e | 2

Confidential and Proprietary Information Reindeer Technologies Private Limited, 2012

This document contains confidential and proprietary information of Reindeer Technologies Private Limited and is protected by copyright laws. Its receipt or possession does not convey any rights to reproduce, manufacture, use or sell anything based on information contained within this document. Any product described in this document is subject to continuous developments and improvements. All particulars of the product and its use contained in this document are given by Reindeer Technologies Private Limited in good faith. However, all warranties implied or expressed, including but not limited to implied warranties of merchantability, or fitness for purpose, are excluded. This document is intended only to assist the reader in the use of the product. Reindeer Technologies Private Limited shall not be liable for any loss or damage arising from the use of any information in this guide, any error or omission in such information, or any incorrect use of the product. Reindeer specifically disclaims any and all liability and warranties, implied or expressed, for uses requiring fail-safe performance in which failure of the product could lead to death, serious personal injury, or severe physical or environmental damage such as, but not limited to, life support or medical devices or nuclear applications or on-line control of aircraft, aircraft navigation or communications systems or in air traffic control applications. This product is not designed for and should not be used in any of these applications.

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Document Revision History

Version No. Release Date Description of Changes

1.0 February 26, 2011 Initial Release

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Table of Contents

Confidential and Proprietary Information ........................................................................................................................ 2

Document Revision History .............................................................................................................................................. 3

1. Overview ................................................................................................................................................................... 5

2. Key Features.............................................................................................................................................................. 5

3. Application Areas ...................................................................................................................................................... 6

4. Functional Block Diagram ......................................................................................................................................... 6

5. Pin Configuration and Function Description ............................................................................................................. 7

6. Device Specifications ................................................................................................................................................ 8

6.1. General Specifications ...................................................................................................................................... 8

6.2. RF Specifications ............................................................................................................................................... 8

7. Mechanical Drawings ................................................................................................................................................ 9

8. Example Circuit ......................................................................................................................................................... 9

9. Custom Applications ............................................................................................................................................... 11

10. Reference ............................................................................................................................................................ 11

11. Ordering Information .......................................................................................................................................... 11

12. Contact Us ........................................................................................................................................................... 11

12.1 Technical Support ........................................................................................................................................... 11

12.2 Sales Support .................................................................................................................................................. 11

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1. Overview

The RDM-A4FZ is a low power, highly integrated FSK/GFSK/ASK/OOK/GOOK transceiver designed for operation in the low UHF and VHF bands. The RDM-A4FZ uses an external VCO inductor that allows users to set the operating frequency anywhere between 400 MHz and 440 MHz The typical range of the VCO is about 10% of the operating frequency. A complete transceiver can be built using a small number of external discrete components, making the RDM-A4FZ very suitable for price-sensitive and area-sensitive applications.

The transmit section contains a VCO and low noise fractional-N PLL with output resolution of <1 ppm. This

frequency agile PLL allows the RDM-A4FZ to be used in frequency-hopping spread spectrum (FHSS) systems. The VCO operates at twice the fundamental frequency to reduce spurious emissions and frequency pulling problems. The transmitter output power is programmable in 63 steps from −20 dBm to +13 dBm. The transceiver RF frequency, channel spacing, and modulation are programmable using a simple 3-wire interface. The device operates with a power supply range of 2.3 V to 3.6 V and can be powered down when not in use.

A low IF architecture is used in the receiver (200 kHz), minimizing power consumption and the external component count and avoiding interference problems at low frequencies. The RDM-A4FZ supports a wide variety of programmable features, including Rx linearity, sensitivity, and IF bandwidth, allowing the user to trade off receiver sensitivity and selectivity for current consumption, depending on the application. The receiver also features automatic frequency control (AFC) loop, allowing the PLL to compensate for frequency error in the incoming signal.

An on-chip ADC provides read back of an integrated temperature sensor, an external analog input, the

battery voltage, or the RSSI signal, which provides savings on an ADC in some applications. The temperature sensor

is accurate to ±10°C over the full operating temperature range of −40°C to +85°C. This accuracy can be improved by

doing a 1-point calibration at room temperature and storing the result in memory.

2. Key Features

● Low power, low IF transceiver ● Frequency bands: 400 MHz to 440 MHz ● Data rates supported:

o 0.15 kbps to 200 kbps, FSK o 0.15 kbps to 64 kbps, ASK

● 3.3 to 3.6 V power supply ● Programmable output power

o -20 dBm to +13 dBm in 63 steps ● Receiver sensitivity

o −119 dBm at 1.0 kbps, FSK

o −114 dBm at 9.6 kbps, FSK

o −118.8 dBm at 9.6 kbps, ASK

● Very low power consumption ● On-chip VCO and fractional-N PLL ● On-chip 7-bit ADC and temperature sensor ● Fully automatic frequency control loop (AFC) compensates for lower tolerance crystals ● Digital RSSI

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● Integrated Tx Rx switch ● Leakage current <1 µA in power down mode

3. Application Areas

Low cost wireless data transfer

Wireless medical applications

Remote control / security systems

Wireless sensor networks

Keyless entry

Home automation

Process and building control

Automotive systems

Active RFID solutions

AMR – Automated Meter Reading

4. Functional Block Diagram

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5. Pin Configuration and Function Description

Pin No. Pin Name Description

1 NC NC

2 GND Power Supply Ground

3 VCC Positive Power Supply (3.6V DC)

4 CLKOUT NC

5 DATACLK Transmit/Receive Clock Pin. In receive mode, the pin outputs the synchronized data clock. The positive clock edge is matched to the center of the received data. In GFSK transmit mode, the pin outputs an accurate clock to latch the data from the microcontroller into the transmit section at the exact required data rate

6 DATA I/O Transmit Data Input/Received Data Output. This is a digital pin and normal CMOS levels apply.

7 INT/LOCK Bidirectional Pin. In output mode (interrupt mode), the RDM-A4FZ asserts the INT/LOCK pin when it has found a match for the preamble sequence. In input mode (lock mode), the microcontroller can be used to lock the demodulator threshold when a valid preamble has been detected. Once the threshold is locked, NRZ data can be reliably received. In this mode, a demodulator lock can be asserted with minimum delay.

8 ADC I/P NC

9 SCLK Serial Clock Input. This serial clock is used to clock in the serial data to the registers. The data is latched into the 24-bit shift register on the CLK rising edge. This pin is a digital CMOS input.

10 SREAD Serial Data Output. This pin is used to feed read back data from the RDM-A4FZ to the microcontroller. The SCLK input is used to clock each read back bit (AFC, ADC read back) from the SREAD pin.

11 SDATA Serial Data Input. The serial data is loaded MSB first, with the 2 LSBs as the control bits. This pin is a high impedance CMOS input.

12 SLE Load Enable, CMOS Input. When LE goes high, the data stored in the shift

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registers is loaded into one of the four latches. A latch is selected using the control bits.

13 MUXOUT NC

14 CE Chip Enable. Bringing CE low puts the RDM-A4FZ into complete power-down. Register values are lost when CE is low, and the part must be reprogrammed once CE is brought high.

6. Device Specifications

6.1. General Specifications Parameter Min Typ Max Unit

Dimensions 40.34 x 31.72 mm

Weight 25 grams

Operating Temperature -40 +85 °C

Humidity 20 85 %RH

Supply Voltage 2.3 3.6 V

6.2. RF Specifications

Parameter Min Typ Max Unit

Frequency Range 400 440 MHz

Data Rate 1.2 19.2 Kbps

RF Output Power Maximum Power Minimum Power Programmable Step Size -20 dBm to +13 dBm

+13 -20 0.5

dBm dBm dBm

RF Sensitivity 1.0 kbps 9.6 kbps

-119 -112

dBm dBm

Transmit Current Consumption 10 dBm

22

mA

Receive Current Consumption 18 mA

Sleep Current Consumption <1 µA

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7. Mechanical Drawings

8. Example Circuit

The example circuit shown below explains how to connect the RDM-A4FZ module to a microcontroller (R8C27).

This sample schematic can be used to develop an experimental board for testing the module.

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9. Custom Applications

For cost-sensitive and custom applications, such as wireless sensors and AMR, Reindeer Technologies can

embed the application software directly into a microcontroller built into the module. For more information on this

service, please contact Reindeer Technologies.

10. Reference

For detailed information about programming the RDM-A4FZ module, please consult the current ADF7020-1

datasheet which can be found at http://www.analog.com.

11. Ordering Information

Ordering Part Number Description RDM-A4FZ RF Transceiver Module (433 MHz)

12. Contact Us

12.1 Technical Support

Reindeer Technologies Pvt. Ltd. has built a solid technical support infrastructure so that you can get answers to your questions when you need them. Our technical support engineers are available Mon-Fri between 9:00 am and6:00 pm Indian standard time.

The best way to reach a technical support engineer is to send an email to support@reindeersystems.com. E-

mail support requests are given priority because we can handle them more efficiently than phone support requests.

12.2 Sales Support

Our sales department can be reached via e-mail at sales@reindeersystems.comor by phone at +91-44-

45022335/42606907.Our sales department is available Mon-Fri between 9:00 am and 6:00 pm.

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Reindeer Technologies Pvt Ltd Excellence through Innovation

No. 77, Baskar Colony

Virugambakkam Chennai – 600092

India. Phone: +91-44-45022335

Email: sales@reindeersystems.com Website: www.reindeer-tech.com