Overview
The AD8231WACPZ-RL, produced by Analog Devices Inc., is a low drift, rail-to-rail, instrumentation amplifier designed for precision performance over a wide temperature range. This amplifier is ideal for applications such as industrial temperature sensing, data logging, and various industrial control systems. It features software-programmable gains and an auto-zero input stage, ensuring high accuracy and stability.
Key Specifications
| Parameter | Value |
|---|---|
| Gain Settings | 1, 2, 4, 8, 16, 32, 64, or 128 (programmable via digital logic or pin strapping) |
| Temperature Range | −40°C to +125°C |
| Input Offset Voltage | 15 μV maximum |
| Input Offset Drift | 50 nV/°C maximum |
| Gain Drift | 10 ppm/°C maximum (for gains of 1 to 32) |
| Common Mode Rejection Ratio (CMRR) | 80 dB minimum at G = 1, increasing to 110 dB at higher gains |
| Bias Current | 500 pA maximum |
| Noise | 0.7 μV p-p (0.1 Hz to 10 Hz) |
| Package | 16-lead LFCSP (4mm x 4mm x 0.75mm) |
| Shutdown Current | 1 μA maximum |
Key Features
- Digitally or pin-programmable gain settings.
- Auto-zero input stage for low input offset voltage and drift.
- Rail-to-rail input and output stages.
- High CMRR of 80 dB minimum at G = 1, increasing to 110 dB at higher gains.
- Includes an uncommitted op amp for additional gain, differential signal driving, or filtering.
- Shutdown feature reducing current to 1 μA and high output impedance for easy multiplexing.
Applications
- Pressure and strain transducers.
- Thermocouples and RTDs.
- Programmable instrumentation.
- Industrial controls.
- Weigh scales.
- Automotive controls.
Q & A
- What are the programmable gain settings of the AD8231WACPZ-RL?
The AD8231WACPZ-RL has programmable gain settings of 1, 2, 4, 8, 16, 32, 64, or 128.
- What is the temperature range for the AD8231WACPZ-RL?
The AD8231WACPZ-RL is specified over the extended industrial temperature range of −40°C to +125°C.
- What is the maximum input offset voltage of the AD8231WACPZ-RL?
The maximum input offset voltage is 15 μV.
- What is the common mode rejection ratio (CMRR) of the AD8231WACPZ-RL?
The CMRR is 80 dB minimum at G = 1, increasing to 110 dB at higher gains.
- Does the AD8231WACPZ-RL include a shutdown feature?
Yes, the AD8231WACPZ-RL includes a shutdown feature that reduces current to 1 μA and increases output impedance.
- What package type is the AD8231WACPZ-RL available in?
The AD8231WACPZ-RL is available in a 16-lead LFCSP (4mm x 4mm x 0.75mm) package.
- Can the AD8231WACPZ-RL be used in defense and aerospace applications?
Yes, the AD8231-EP version supports defense and aerospace applications with an AQEC standard and military temperature range.
- What additional functionality does the uncommitted op amp provide?
The uncommitted op amp can be used for additional gain, differential signal driving, or filtering.
- How does the auto-zero input stage benefit the performance of the AD8231WACPZ-RL?
The auto-zero input stage ensures low input offset voltage and drift, enhancing the overall precision and stability of the amplifier.
- What are some typical applications of the AD8231WACPZ-RL?
Typical applications include pressure and strain transducers, thermocouples and RTDs, programmable instrumentation, industrial controls, weigh scales, and automotive controls.
