Overview
The AD8227BRZ , a low-power, low-noise, precision instrumentation amplifier from Analog Devices (ADI) , is designed for applications requiring high accuracy and energy efficiency. The device delivers a high common-mode rejection ratio (CMRR) of 86dB and rail-to-rail output capability while consuming currents as low as 0.9mA , making it suitable for battery-powered, high-precision measurement systems.
The AD8227BRZ’s gain is set by a single external resistor from G = 5 to 1000 , simplifying circuit design and reducing error accumulation. It is available in an 8-pin SOIC package and supports the industrial temperature range of –40°C to +85°C.
Core parameters
Parameter | Numerical |
Input Type | Differential input |
Gain range | 5 ~ 1000 (set by external resistor) |
Supply voltage range | 2.2V ~ 36V (single power supply) or ±1.1V ~ ±18V (dual power supply) |
Quiescent current | 0.9mA (typical) |
Common-mode rejection ratio (CMRR) | 86dB (G=10, 1kHz) |
Bandwidth (BW) | 350kHz (G=5) |
Input offset voltage | 60µV (typical) |
Input bias current | 2nA (typical) |
Rail-to-rail output | support |
Package | SOIC-8 |
Operating temperature range | –40°C to +85°C |
Environmental standards | RoHS, lead-free |
Features
Low power design
The typical current is only 0.9mA, which extends the life of battery-powered devices.
High-precision performance
Low offset voltage (60µV) and low bias current (2nA) ensure accurate signal measurement.
Rail-to-rail output
Provides wider output dynamic range, suitable for low voltage systems and ADC front ends.
Wide supply voltage range
Supports 2.2V ~ 36V and is suitable for single and dual power supply applications.
Simplified gain setting
Gain is set with a single resistor, simplifying design and reducing error sources.
Typical application scenarios
Sensor signal conditioning
Differential signal amplification of strain gauges, thermocouples, pressure sensors, and Hall sensors.
Medical devices
Low-power medical equipment such as electrocardiogram (ECG), electroencephalogram (EEG), blood pressure and body temperature monitoring.
Industrial process control
Differential current or voltage acquisition, signal front end in PLC modules.
Portable measuring equipment
Battery-powered multimeter and data acquisition terminal.
Environmental Monitoring and IoT Nodes
Temperature, humidity, gas sensors and remote sensing modules.
Performance Comparison
Index | AD8227BRZ | AD620 (classic model) |
Quiescent current | 0.9mA | 1.3mA |
Power supply voltage range | 2.2V ~ 36V | ±2.3V ~ ±18V |
CMRR | 86dB | 100dB |
Gain range | 5 ~ 1000 | 1 ~ 1000 |
Encapsulation | SOIC-8 | DIP-8/SOIC-8 |
Compared with AD620, AD8227BRZ has lower power consumption, supports lower voltage , and is more suitable for portable and battery-powered scenarios.
Manufacturer Profile: Analog Devices (ADI)
ADI is a leading global supplier of high-performance analog chips, including data converters, amplifiers, signal processors, and power management ICs. The AD8227BRZ , part of ADI’s precision instrumentation amplifier series, excels in high-precision measurement and low-power applications.
Why choose AD8227BRZ?
● Low power consumption (0.9mA) to extend battery life
● High precision (low offset voltage and low bias current)
● Rail-to-rail output, compatible with low-voltage ADCs
● Adjustable gain (5~1000), flexible adaptation to different sensors
● Wide voltage range, suitable for single and dual power supply systems
● Industrial temperature range, adaptable to complex environments
Frequently Asked Questions (FAQ)
Q1: Can the AD8227BRZ directly amplify thermocouple signals?
Yes, the AD8227BRZ is a precision instrumentation amplifier with low noise and low offset voltage (typically 50 μV). It is suitable for amplifying small differential signals such as thermocouples and strain gauges. Its high common-mode rejection ratio (CMRR) of 100 dB effectively suppresses environmental interference, thereby improving temperature measurement and signal acquisition accuracy.
Q2: Is it suitable for low-power portable devices?
Yes, the AD8227BRZ is a precision instrumentation amplifier with low noise and low offset voltage (typically 50 μV). It is suitable for amplifying small differential signals such as thermocouples and strain gauges. Its high common-mode rejection ratio (CMRR) of 100 dB effectively suppresses environmental interference, thereby improving temperature measurement and signal acquisition accuracy.
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