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This device is not recommended for new designs.

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 300 to 930 MHz. In programmable user mode, the transceiver can operate down to 27 MHz by employing an external voltage-controlled oscillator (VCO) varactor diode.

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Top 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 option for extended input frequency acceptance range

  • 3-wire 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)
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Multi-channel FSK/FM/ASK transceiver - 27 to 930 MHz - TH71221

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

  • 3-wire 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)
Used in these

Industries

  • Building, Security, Home & Office Automation
  • Consumer Solutions

Documents and tools

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