Overview
The ADA4638-1ACPZ-R7 is a high-voltage, high-precision, zero-drift operational amplifier produced by Analog Devices Inc. This amplifier is designed to operate over a wide range of supply voltages and is particularly suited for applications requiring high accuracy and stability over temperature. The ADA4638-1 features a rail-to-rail output swing, low offset voltage, and minimal drift, making it ideal for precision applications such as pressure sensors, medical equipment, and strain gage amplifiers.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 4.5 | - | 30 | V |
| Dual Supply Voltage | ±2.25 | - | ±15 | V |
| Offset Voltage | - | - | 4 | μV |
| Offset Voltage Drift | - | - | 0.05 | μV/°C |
| Power Supply Rejection Ratio (PSRR) | 120 | - | 143 | dB |
| Common-Mode Rejection Ratio (CMRR) | 130 | - | - | dB |
| Supply Current per Amplifier | 0.85 | 1.05 | 1.25 | mA |
| Slew Rate | - | - | 1.5 | V/μs |
| Operating Temperature Range | -40 | - | 125 | °C |
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 and high PSRR: 120 dB minimum
- High CMRR: 130 dB minimum
- Rail-to-rail output swing
- No 1/f noise and low input voltage noise: 1.2 μV p-p (0.1 Hz to 10 Hz)
- Low supply current: less than 0.95 mA at ±5 V
- Available in 8-lead LFCSP (3 mm × 3 mm) and SOIC packages
Applications
- Pressure sensors
- Medical equipment
- Strain gage amplifiers
- High precision measurement and control systems
- Industrial automation and instrumentation
Q & A
- What is the operating voltage range of the ADA4638-1?
The ADA4638-1 operates from 4.5 V to 30 V single supply or ±2.25 V to ±15 V dual supplies.
- What is the maximum offset voltage of the ADA4638-1?
The maximum offset voltage is 4 μV.
- What is the offset voltage drift of the ADA4638-1?
The offset voltage drift is less than 0.05 μV/°C.
- What is the common-mode rejection ratio (CMRR) of the ADA4638-1?
The CMRR is 130 dB minimum.
- What are the available package types for the ADA4638-1?
The ADA4638-1 is available in 8-lead LFCSP (3 mm × 3 mm) and SOIC packages.
- What is the typical supply current of the ADA4638-1?
The typical supply current is 1.05 mA at ±5 V.
- What is the slew rate of the ADA4638-1?
The slew rate is 1.5 V/μs.
- What is the operating temperature range of the ADA4638-1?
The operating temperature range is -40°C to +125°C.
- What are some typical applications of the ADA4638-1?
Typical applications include pressure sensors, medical equipment, and strain gage amplifiers.
- Does the ADA4638-1 have rail-to-rail output swing?
Yes, the ADA4638-1 features a rail-to-rail output swing.
