The AD8138 is a low distortion differential ADC driver with easy to use single-ended to differential conversion, adjustable output common-mode voltage, externally adjustable gain, low harmonic distortion, wide bandwidth, fast settling, low input voltage noise, 1mV typical offset voltage, wide supply range, low power and 0.1dB gain flatness.
The AD8138 from Analog Devices provides single‑ended‑to‑differential conversion with adjustable output common‑mode voltage and externally adjustable gain. It offers low harmonic distortion (‑94 dBc second‑order at 5 MHz) and a wide supply range of +3 V to 5 V, making it suitable for high‑frequency ADC applications.
The device is available in 8‑lead SOIC and MSOP packages and operates from –40 °C to +85 °C. Key performance figures include a small‑signal –3 dB bandwidth of 320 MHz, slew rate of 1150 V/µs, input voltage noise of 5 nV/√Hz, and a quiescent current of about 20 mA at 5 V supply.
| Supply Voltage Range | +3 V to 5 V |
|---|---|
| Quiescent Current | ≈20 mA at 5 V |
| Maximum Output Current | 95 mA |
It operates from +3 V up to 5 V.
The AD8138 can source up to 95 mA of output current.