Key facts
- Brand
- Analog Devices
- Model
- AD8638
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-03-23
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Analog Devices AD8638/AD8639 Auto-Zero Operational Amplifiers Datasheet
The AD8638 (single) and AD8639 (dual) are low‑noise, auto‑zero amplifiers that operate from 5 V to 16 V single‑supply or ±2.5 V to ±8 V dual‑supply. They provide rail‑to‑rail output swing, high gain (≈136 dB), high CMRR (≈133 dB) and low input bias current (≈40 pA). The devices are specified for an extended industrial temperature range (‑40 °C to +125 °C) and the AD8639 is qualified for automotive applications.
The datasheet includes pin configurations for several packages (5‑lead SOT‑23, 8‑lead SOIC, MSOP, LFCSP), absolute maximum ratings, thermal resistance data, typical performance curves, and an ordering guide that lists automotive‑grade part numbers. Detailed electrical characteristics are given for both 5 V and 16 V supply conditions.
Analog Devices AD8638 specifications
| Offset Voltage (typical) | 9 µV |
|---|---|
| Input Bias Current (typical) | 40 pA |
| Supply Current per Amplifier (typical) | 1.3 mA |
| CMRR (typical) | 133 dB |
| PSRR (typical) | 143 dB |
Source: Analog Devices AD8638/AD8639 Auto-Zero Operational Amplifiers Datasheet
All Analog Devices AD8638 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical offset voltage of the AD8638/AD8639?
The typical offset voltage is 9 µV.
From: Analog Devices AD8638/AD8639 Auto-Zero Operational Amplifiers Datasheet
How much supply current does each amplifier draw?
Each amplifier draws about 1.3 mA of supply current under typical conditions.
From: Analog Devices AD8638/AD8639 Auto-Zero Operational Amplifiers Datasheet
What is the typical input offset voltage of the AD8638/AD8639?
Typical input offset voltage is between 3 µV and 9 µV.
What supply voltage range can the devices operate from?
They operate from 5 V to 16 V with a single supply, or from ±2.5 V to ±8 V with a dual supply.