AD8370 is a low cost, digitally controlled, variable gain amplifier (VGA) that provides precision gain control, high IP3, and low noise figure. Its excellent distortion performance and wide input dynamic range make it suitable for a variety of applications, such as differential ADC drivers, IF sampling receivers, RF/IF gain stages, cable and video applications, SAW filter interfacing, and single-ended-to-differential conversion.
The AD8370 is a digitally controlled variable gain amplifier (VGA) that offers precision gain control, low noise figure and high third‑order intercept (IP3). It provides two gain ranges – low (‑11 dB to +17 dB) and high (6 dB to 34 dB) – selectable via an 8‑bit serial interface, and operates from a single 3 V to 5 V supply.
Typical applications include differential ADC drivers, IF sampling receivers and RF/IF gain stages. The device features differential inputs and outputs, a power‑down mode with less than 4 mA consumption, and is supplied in a 16‑lead TSSOP package that operates from –40 °C to +85 °C.
| Supply Voltage | 3.0 V to 5.5 V |
|---|---|
| Quiescent Current (typical) | 78 mA |
| -3 dB Bandwidth | 750 MHz |
| Gain Range | -11 dB to +34 dB |
| Gain Range | -11 dB to +34 dB |
| Input Resistance (Differential) | 200 Ω |
| Noise Figure | 7.2 dB |
| Output IP3 | 35 dBm |
| Power‑Down Current | 3.7 mA |
| Operating Temperature Range | -40 °C to +85 °C |
The AD8370 operates from a single supply between 3.0 V and 5.5 V.
In power‑down mode the device consumes about 3.7 mA.
When powered up the AD8370 draws roughly 78 mA of quiescent current.
The high‑gain mode provides up to 34 dB of gain.