The ADA4004-1/ADA4004-2/ADA4004-4 are 1.8 nV/√Hz precision amplifiers featuring 40 μV offset, 0.7 μV/°C drift, 12 MHz bandwidth, and low 1.7 mA per amplifier supply current.
The ADA4004 series are 1.8 nV/√Hz precision amplifiers offering very low voltage noise, low input bias current, high gain (120 dB) and a wide 12 MHz bandwidth. They are suited for precision instrumentation, filter blocks, microphone preamplifiers, industrial control, thermocouples, RTDs, and reference buffers.
The datasheet provides detailed specifications, pin configurations for multiple package types (5‑lead SOT, 8‑lead SOIC, 8‑lead MSOP, 14‑lead SOIC, 16‑lead LFCSP), absolute maximum ratings, thermal resistance data, and typical performance curves covering gain, phase margin, noise, and supply current versus voltage and temperature.
| Voltage Noise Density | 1.8 nV/√Hz |
|---|---|
| Gain Bandwidth Product | 12 MHz |
| Supply Current per Amplifier | 2.0 mA (typical) |
| Input Bias Current | 85 nA (typical) |
| Offset Voltage | 140 µV (typical) |
| Power Supply Rejection Ratio | 110‑118 dB |
The ADA4004 devices have a voltage noise density of 1.8 nV/√Hz at 1 kHz.
Each amplifier draws about 2.0 mA of supply current under typical conditions.
The devices operate from +5 V to +15 V.
The amplifiers are specified for operation from –40 °C to +125 °C.