Overview
The AD8228ARZ-R7 from Analog Devices Inc. is a high-performance instrumentation amplifier known for its exceptional gain accuracy and stability. This amplifier is designed to operate on both single and dual supplies, with a wide power supply range of ±2.3 V to ±18 V, making it suitable for applications involving high common-mode input voltages. The AD8228ARZ-R7 features internal and laser-trimmed gain setting resistors, which ensure high gain accuracy and minimal gain drift. It is available in an 8-lead SOIC package and is operational over the industrial temperature range of −40°C to +85°C, with extended operation up to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | 10, 100 | - |
| Gain Drift | 2 ppm/°C | - |
| Gain Error | 0.02% | - |
| Input Offset Voltage | 50 μV | μV |
| Input Offset Drift | 0.8 μV/°C | μV/°C |
| Input Bias Current | 0.6 nA | nA |
| Common Mode Rejection Ratio (CMRR) | 100 dB | dB |
| Bandwidth (-3 dB) | 650 kHz (G = 10) | kHz |
| Slew Rate | 2 V/μs | V/μs |
| Noise | 8 nV/√Hz @ 1 kHz (G = 100) | nV/√Hz |
| Supply Voltage Range | ±2.3 V to ±18 V | V |
| Quiescent Current | 0.85 mA | mA |
| Operating Temperature Range | −40°C to +85°C (specified), −40°C to +125°C (operational) | °C |
| Package | 8-lead SOIC | - |
Key Features
- High gain accuracy and minimal gain drift due to internal and laser-trimmed gain setting resistors.
- Wide power supply range: ±2.3 V to ±18 V, suitable for high common-mode input voltages.
- Low input offset voltage (50 μV) and low input offset drift (0.8 μV/°C).
- Low input bias current (0.6 nA).
- High CMRR of 100 dB.
- Bandwidth of 650 kHz at a gain of 10 and slew rate of 2 V/μs.
- Low noise: 8 nV/√Hz at 1 kHz (G = 100).
- Operational over the industrial temperature range of −40°C to +85°C, with extended operation up to +125°C.
Applications
- Weigh scales and industrial process controls.
- Bridge amplifiers and precision data acquisition systems.
- Medical instrumentation and strain gage interfaces.
- Transducer interfaces where high dc performance is required.
Q & A
- What is the gain range of the AD8228ARZ-R7?
The AD8228ARZ-R7 has a gain range of 10 and 100, set by pin-strappable resistors.
- What is the input offset voltage of the AD8228ARZ-R7?
The input offset voltage is 50 μV.
- What is the common mode rejection ratio (CMRR) of the AD8228ARZ-R7?
The CMRR is 100 dB.
- What is the bandwidth of the AD8228ARZ-R7 at a gain of 10?
The bandwidth is 650 kHz at a gain of 10.
- What is the slew rate of the AD8228ARZ-R7?
The slew rate is 2 V/μs.
- What is the noise level of the AD8228ARZ-R7 at 1 kHz and a gain of 100?
The noise level is 8 nV/√Hz at 1 kHz and a gain of 100.
- What is the operating temperature range of the AD8228ARZ-R7?
The specified operating temperature range is −40°C to +85°C, with extended operation up to +125°C.
- What package types are available for the AD8228ARZ-R7?
The AD8228ARZ-R7 is available in an 8-lead SOIC package.
- What are some typical applications of the AD8228ARZ-R7?
Typical applications include weigh scales, industrial process controls, bridge amplifiers, precision data acquisition systems, medical instrumentation, and transducer interfaces.
- Can the AD8228ARZ-R7 operate on single and dual supplies?
Yes, the AD8228ARZ-R7 can operate on both single and dual supplies.
