Overview
The AD8231ACPZ-R7 is a zero-drift, digitally programmable instrumentation amplifier produced by Analog Devices Inc. This component is designed to offer high precision and flexibility in various measurement and signal conditioning applications. It features an uncommitted operational amplifier that can be used for additional gain, differential signal driving, or filtering, enhancing its versatility in system design.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Gain | - | 1 | - | 128 | - |
| Input Offset Voltage (VOS) | RTI = VOSI + VOSO/G | 4 | 15 | 30 | µV |
| Average Temperature Drift | - | 0.01 | 0.05 | 0.5 | µV/°C |
| Input Bias Current | TA = -40°C to +125°C | 250 | 500 | 5 nA | pA |
| Gain Error | G = 1 | - | 0.05% | - | % |
| Gain Drift | TA = -40°C to +125°C, G = 1 to 32 | 3 | - | 10 | ppm/°C |
| Bandwidth | G = 1 | - | - | 2.7 MHz | MHz |
| Slew Rate | - | - | - | 1.1 V/µs | V/µs |
| Output Voltage High | RL = 100 kΩ to ground | 4.9 | 4.94 | - | V |
| Output Voltage Low | RL = 100 kΩ to 5 V | 60 | 100 | - | mV |
| Short-Circuit Current | - | - | - | 70 mA | mA |
| Package | - | - | - | LFCSP-16 (4x4) | - |
Key Features
- Digitally/Pin-Programmable Gain: The AD8231 allows for programmable gain settings of 1, 2, 4, 8, 16, 32, 64, or 128, providing flexibility in various applications.
- Zero Drift: Offers excellent dc performance with a maximum input offset drift of 50 nV/°C and a maximum gain drift of 10 ppm/°C.
- High CMRR: Features a minimum common-mode rejection ratio (CMRR) of 80 dB at a gain of 1.
- Low Noise and Offset: Has a maximum input offset voltage of 15 µV and a noise level of 0.7 µV p-p (0.1 Hz to 10 Hz).
- Good AC Performance: Includes a bandwidth of up to 2.7 MHz at a gain of 1 and a slew rate of 1.1 V/µs.
- Uncommitted Op Amp: An additional operational amplifier is included for tasks such as additional gain, differential signal driving, or filtering.
Applications
- Medical Devices: Suitable for ECG, EEG, and other biomedical signal acquisition due to its high precision and low noise characteristics.
- Industrial Automation: Used in sensor signal conditioning, process control, and data acquisition systems where high accuracy is required.
- Aerospace and Defense: Ideal for applications requiring high reliability and precision in harsh environments.
- Test and Measurement Equipment: Employed in various measurement instruments such as multimeters, oscilloscopes, and signal generators.
Q & A
- What is the gain range of the AD8231?
The AD8231 has a programmable gain range of 1, 2, 4, 8, 16, 32, 64, or 128.
- What is the input offset voltage of the AD8231?
The maximum input offset voltage is 15 µV.
- What is the common-mode rejection ratio (CMRR) of the AD8231?
The minimum CMRR is 80 dB at a gain of 1.
- What is the bandwidth of the AD8231 at a gain of 1?
The bandwidth at a gain of 1 is 2.7 MHz.
- Does the AD8231 include an additional operational amplifier?
Yes, it includes an uncommitted operational amplifier for additional functions like gain, differential signal driving, or filtering.
- What is the package type of the AD8231ACPZ-R7?
The package type is LFCSP-16 (4x4).
- What is the operating temperature range of the AD8231?
The operating temperature range is from -40°C to +125°C.
- What is the maximum short-circuit current of the AD8231?
The maximum short-circuit current is 70 mA.
- Is the AD8231 suitable for medical device applications?
Yes, it is suitable due to its high precision, low noise, and low drift characteristics.
- What is the typical supply current of the AD8231?
The typical supply current is not explicitly stated in the provided sources, but it is designed for low power consumption.
