The ADA4528-1 is a precision, ultralow noise, RRIO, zero-drift op amp from Analog Devices. It features low offset, low offset voltage drift, low noise, high open-loop gain, closed-loop gain, CMRR, PSRR, and rail-to-rail input and output.
The ADA4528-1 operational amplifier offers ultralow offset (2.5 µV max) and drift (0.015 µV/°C), with a typical noise density of 5.6 nV/√Hz at 1 kHz. It operates from a single supply of 2.2 V to 5.5 V (or ±1.1 V to ±2.75 V) and provides rail‑to‑rail input and output swing.
Key features include a gain‑bandwidth product of 4 MHz, CMRR of 135 dB min, PSRR of 130 dB min, and a closed‑loop output impedance of 0.1 Ω. The device is offered in 8‑lead MSOP and 8‑lead LFCSP packages and is rated for an extended industrial temperature range (‑40 °C to +125 °C).
| Offset Voltage (typical) | 2.5 µV |
|---|---|
| Offset Voltage Drift (typical) | 0.015 µV/°C |
| Noise Density (1 kHz) | 5.6 nV/√Hz |
| Supply Voltage Range (single‑supply) | 2.2 V to 5.5 V |
| Gain‑Bandwidth Product | 4 MHz |
| CMRR (minimum) | 135 dB |
| PSRR (minimum) | 130 dB |
The device can operate from a single supply of 2.2 V to 5.5 V, or from ±1.1 V to ±2.75 V for dual‑supply operation.
The typical offset voltage is 2.5 µV maximum.
The noise density is 5.6 nV/√Hz at 1 kHz (AV = +100).
The gain‑bandwidth product is 4 MHz.