Overview
The ADA4638-1ARZ from Analog Devices Inc. is a high-voltage, high-precision, zero-drift operational amplifier. It is designed to operate over a wide range of supply voltages, from 4.5 V to 30 V for single supply and ±2.25 V to ±15 V for dual supplies. This amplifier is notable for its low offset voltage of 4 μV maximum and an offset voltage drift of less than 0.05 μV/°C, making it suitable for high-precision applications where minimal error is critical. The ADA4638-1ARZ features rail-to-rail output swing, high gain of 130 dB, high power supply rejection ratio (PSRR) of 120 dB, and high common-mode rejection ratio (CMRR) of 130 dB. It is available in 8-lead SOIC and LFCSP packages and operates over an extended industrial temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 4.5 V to 30 V, ±2.25 V to ±15 V | V |
| Input Offset Voltage | 4 μV | μV |
| Input Offset Voltage Drift | 0.05 μV/°C | μV/°C |
| Gain | 130 dB | dB |
| PSRR | 120 dB | dB |
| CMRR | 130 dB | dB |
| Gain Bandwidth Product | 1.5 MHz | MHz |
| Slew Rate | 1.5 V/μs | V/μs |
| Input Bias Current | 45 pA | pA |
| Supply Current | 0.95 mA | mA |
| Operating Temperature Range | −40°C to +125°C | °C |
| Package Type | 8-lead SOIC, 8-lead LFCSP |
Key Features
- Single supply operation: 4.5 V to 30 V and dual supply operation: ±2.25 V to ±15 V
- Low offset voltage: 4 μV maximum and low offset voltage drift: 0.05 μV/°C maximum
- High gain: 130 dB minimum, high PSRR: 120 dB minimum, and high CMRR: 130 dB minimum
- Rail-to-rail output swing and input common-mode range includes lower supply rail
- Low supply current: less than 0.95 mA at ±5 V
- No 1/f noise and low input voltage noise: 1.2 μV p-p (0.1 Hz to 10 Hz)
- Available in 8-lead SOIC and LFCSP packages
- Operating temperature range: −40°C to +125°C
Applications
- Electronic weigh scales
- Pressure and position sensors
- Strain gauge amplifiers
- Medical instrumentation
- Thermocouple amplifiers
Q & A
- What is the supply voltage range of the ADA4638-1ARZ?
The ADA4638-1ARZ operates from 4.5 V to 30 V for single supply and ±2.25 V to ±15 V for dual supplies.
- What is the input offset voltage of the ADA4638-1ARZ?
The input offset voltage is 4 μV maximum.
- What is the input offset voltage drift of the ADA4638-1ARZ?
The input offset voltage drift is less than 0.05 μV/°C.
- What is the gain bandwidth product of the ADA4638-1ARZ?
The gain bandwidth product is 1.5 MHz.
- What is the slew rate of the ADA4638-1ARZ?
The slew rate is 1.5 V/μs.
- What are the typical applications of the ADA4638-1ARZ?
Typical applications include electronic weigh scales, pressure and position sensors, strain gauge amplifiers, medical instrumentation, and thermocouple amplifiers.
- What are the available package types for the ADA4638-1ARZ?
The ADA4638-1ARZ is available in 8-lead SOIC and 8-lead LFCSP packages.
- What is the operating temperature range of the ADA4638-1ARZ?
The operating temperature range is −40°C to +125°C.
- Does the ADA4638-1ARZ have rail-to-rail output swing?
Yes, the ADA4638-1ARZ features rail-to-rail output swing.
- What is the input bias current of the ADA4638-1ARZ?
The input bias current is 45 pA.
