TSH690 is a wideband RF amplifier, consisting of 2 stages, designed in advanced bipolar process featuring 28dB gain and +13.5dBm output power at 450MHz under 3V. The pin 8 allows an external bias current adjust to tune the output power and also to set the amplifier in power-down mode. This powerful amplifier is dedicated to equip secured RF data transmitters as antenna drivers in ISM band (reliable RF meter-reading systems, secured Remote Controls, Cordless Telephones, etc.)
The TSH690 is a wide‑band RF amplifier offered by STMicroelectronics. It operates from 40 MHz to 1 GHz, provides up to 28 dB gain and +13.5 dBm output power at 450 MHz with a supply voltage of 1.5 V to 5 V. The device is supplied in an 8‑pin plastic micro‑package (SO8) with 50 Ω input and output matching.
The datasheet includes electrical characteristics, typical scattering parameters, biasing and matching recommendations, as well as mechanical dimensions. Application notes describe recommended DC‑blocking capacitors, biasing schemes, and decoupling components for optimal performance across the frequency range.
| Operating Voltage | 1.5 V to 5 V |
|---|---|
| Frequency Range | 40 MHz to 1 GHz |
| Gain (450 MHz, 3 V) | 28 dB |
| Output Power (450 MHz, 3 V) | +13.5 dBm |
| Supply Current (typical) | 46 mA |
| Input/Output Matching | 50 Ω |
| Maximum Supply Voltage | 5.5 V |
| Package Type | SO8 plastic micro‑package, 8 pins |
The amplifier can be powered with a supply voltage from 1.5 V up to 5 V, and the bias pin allows adjustment within this range.
Use 100 pF above 500 MHz, 1 nF below 500 MHz, and 10 nF for frequencies lower than 100 MHz.