TH7122 is a 27 to 930MHz FSK/FM/ASK transceiver with a single chip solution and low power consumption. It is suitable for various applications such as digital data and analog signal communication.
The TH7122 is a single‑chip FSK/FM/ASK transceiver IC designed for low‑power, multi‑channel programmable or stand‑alone half‑duplex data transmission. It operates in automotive, industrial‑scientific‑medical (ISM) and short‑range device applications across a wide frequency range.
The document provides detailed specifications, pin definitions, functional schematics, block diagrams, user‑mode features, register descriptions, application circuit examples, and reliability information for designers integrating the TH7122 into their systems.
| Frequency range (programmable mode) | 300 MHz to 930 MHz |
|---|---|
| Extended frequency range (external VCO) | 27 MHz to 930 MHz |
| Power supply range | 2.2 V to 5.5 V |
| Operating temperature range | -40 °C to +85 °C |
| Standby current | 50 nA |
| Receive current (low gain) | 6.5 mA |
| Transmit current (at -2 dBm) | 12 mA |
| Adjustable RF output power | -20 dBm to +10 dBm |
| Sensitivity (FSK) | -105 dBm (180 kHz BW) |
| Sensitivity (ASK) | -107 dBm (180 kHz BW) |
| Maximum data rate (direct VCO modulation) | 115 kbps NRZ |
| Input frequency acceptance | +10 kHz to +150 kHz |
The TH7122 operates from 300 MHz to 930 MHz in programmable user mode and can be extended down to 27 MHz with an external VCO varactor diode.
The standby current is specified as 50 nA.
The device operates with a supply voltage between 2.2 V and 5.5 V.
In ASK mode the sensitivity is -107 dBm with a 180 kHz bandwidth.