Overview
The AD8228BRZ, produced by Analog Devices Inc., is a high-performance instrumentation amplifier known for its very high gain accuracy. This device is designed with internal and laser-trimmed gain setting resistors, ensuring precise gain settings and minimal gain drift. The AD8228 operates on a wide power supply range from ±2.3 V to ±18 V, making it suitable for applications requiring high common-mode input voltages. It is available in 8-lead MSOP and SOIC packages and is specified over the entire industrial temperature range of −40°C to +85°C, with operational capabilities extending to −40°C to +125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Drift | 2 | ppm/°C | ||
| Gain Error (B Grade, G = 10) | 0.02% | % | ||
| Input Offset Voltage | 50 | μV | ||
| Input Offset Drift | 0.8 | μV/°C | ||
| Input Bias Current | 0.6 | nA | ||
| Common-Mode Rejection Ratio (CMRR) | 100 | dB | ||
| Bandwidth (G = 10) | 650 | kHz | ||
| Slew Rate | 2 | V/μs | ||
| Noise (G = 100, @ 1 kHz) | 8 | nV/√Hz | ||
| Input Operating Voltage Range | −VS + 1.9 | +VS − 1.2 | V | |
| Quiescent Current | 0.85 | 1.2 | mA | |
| Operating Temperature Range | −40 | +125 | °C |
Key Features
- Easy to use with pin strappable gains of 10 and 100.
- Wide power supply range: ±2.3 V to ±18 V.
- High gain accuracy due to internal and laser-trimmed gain setting resistors.
- Low noise: 8 nV/√Hz at 1 kHz (G = 100).
- High common-mode rejection ratio (CMRR) of 100 dB.
- Operates on both single and dual supplies.
- Available in 8-lead MSOP and SOIC packages.
Applications
- Weigh scales
- Industrial process controls
- Bridge amplifiers
- Precision data acquisition systems
- Medical instrumentation
- Strain gages and transducer interfaces.
Q & A
- What are the available gain settings for the AD8228?
The AD8228 has pin strappable gains of 10 and 100.
- What is the power supply range for the AD8228?
The AD8228 operates on a wide power supply range from ±2.3 V to ±18 V.
- What is the gain drift of the AD8228?
The gain drift of the AD8228 is 2 ppm/°C).
- What is the input offset voltage of the AD8228?
The maximum input offset voltage is 50 μV).
- What is the common-mode rejection ratio (CMRR) of the AD8228?
The CMRR is 100 dB).
- What is the bandwidth of the AD8228 at a gain of 10?
The bandwidth at a gain of 10 is 650 kHz).
- What is the slew rate of the AD8228?
The slew rate is 2 V/μs).
- What are the typical noise levels of the AD8228?
The noise level is 8 nV/√Hz at 1 kHz (G = 100)).
- In what temperature range does the AD8228 operate?
The AD8228 operates from −40°C to +125°C, with specified performance from −40°C to +85°C).
- What are some common applications of the AD8228?
The AD8228 is used in weigh scales, industrial process controls, bridge amplifiers, precision data acquisition systems, medical instrumentation, strain gages, and transducer interfaces).
