EVB7122-433-FSK-C【PDF 1/24 页】BOARD EVAL FOR TH7122 433MHZ

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EVB7122

27 to 930MHz Transceiver

Evaluation Board Description

Features

Single chip solution with only a few external

components

Stand-alone fixed-frequency user mode

Programmable multi-channel user mode

Low current consumption in active mode and

very low standby current

PLL-stabilized RF VCO (LO) with internal

varactor diode

Lock detect output in programmable

user mode

On-chip AFC for extended input frequency

acceptance range

FSK for digital data or FM for analog signal

reception

Ordering Information

Part No.

EVB7122-315-FSK-C

EVB7122-433-FSK-C

FSK/ASK mode selection

RSSI output for signal strength indication and

ASK reception

ASK detection normal or with peak detector

Switchable LNA gain for improved dynamic

range

Automatic PA turn-on after PLL lock

ASK modulation achieved by PA on/off keying

3wire bus serial control interface

EVB comes with a cable to connect to a PC’s

LPT port

EVB programming software is available on

Melexis web site

EVB7122-868-FSK-C

EVB7122-915-FSK-C

* EVB7122-XXX-YYY-C with XXX = Reception frequency (315, 433.92, 868.3 or 915MHz) and YYY = Modulation (FSK or ASK).

** EVB default population is FSK, ASK modifications according to paragraph 4.2 and 4.3.

*** The evaluation board is supplied with a SMA connector.

Application Examples

Evaluation Board Example

General bi-directional half duplex digital data

RF signaling or analog signal communication

Tire Pressure Monitoring Systems (TPMS)

Remote Keyless Entry (RKE)

Low-power telemetry systems

Alarm and security systems

Wireless access control

Garage door openers

Networking solutions

Active RFID tags

Remote controls

Home and building automation

General Description

The TH7122 is a single chip FSK/FM/ASK transceiver IC. It is designed to operate in low-power multi-

channel programmable or single-channel stand-alone, half-duplex data transmission systems. It can be used

for applications in automotive, industrial-scientific-medical (ISM), short range devices (SRD) or similar

applications operating in the frequency range of 300 MHz to 930 MHz. In programmable user mode, the

transceiver can operate down to 27 MHz by employing an external VCO varactor diode.

39012 07122 02

Rev. 006

Page 1 of 24

EVB Description

June/08

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