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TH71221 Transceiver - 27 to 930MHz, FSK/FM/ASK, Multi-Channel (32L QFN 5x5 Quad)

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The TH71221 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 300MHz to 930MHz. In programmable user mode, the transceiver can operate down to 27MHz by employing an external VCO varactor diode.

Features and Benefits

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 option for extended input frequency acceptance range
3wire bus serial control interface
FSK/ASK modulation selection
FSK for digital data and FM for analog signal reception
RSSI allows signal strength indication and ASK reception
Peak detector for ASK detection
Switchable LNA gain for improved dynamic range
Automatic PA turn-on after PLL lock
ASK modulation achieved by PA on/off keying
32-pin Quad Flat No-Lead (32L QFN 5x5 Quad)

Product Applications

Wireless Access Control
Tire Pressure Monitoring Systems (TPMS)
Remote Keyless Entry (RKE)
Remote Controls
Alarm and Security Systems
Garage Door Openers
Active RFID Tags
General Bi-Directional Half Duplex Digital or Analog Signal Communication
Home and Building Automation
Low Power Telemetry Systems
Networking Solutions

Assets

Application Note	File Type	Size	Revision	Date	Action
Crystal Selection Guide	PDF	127.2 KB	002	10/24/2006
PA Output Matching	PDF	114.5 KB	001	4/10/2006
TH7122 and TH71221 Cookbook	PDF	927.5 KB	004	3/9/2006
TH7122 High Speed Data Communication	PDF	252.0 KB	002	3/9/2006
TH7122 Used In Narrow Band FSK Applications	PDF	240.6 KB	002	3/9/2006
TH7122 Using an External Microprocessor Reference Oscillator (RO)	PDF	46.8 KB	002	3/9/2006
TH7122 with External PA and LNA	PDF	1.0 MB	001	2/22/2007
TH71221 WSN	PDF	229.8 KB	002	10/15/2008

DataSheet	File Type	Size	Revision	Date	Action
TH71221 DataSheet	PDF	1.1 MB	006	7/3/2008

Product flyers	File Type	Size	Revision	Date	Action
TH71221 Product Information	PDF	659.6 KB	02-07	2/27/2007

Reference	File Type	Size	Revision	Date	Action
RF Quick Reference	PDF	87.8 KB	018	6/26/2008
Spec CDSCB10M7GA136_TH7122x	PDF	415.9 KB		9/29/2005
Test Data CDSCB10M7GA136_test	PDF	173.6 KB		9/29/2005