Overview
The AD620BRZ, produced by Analog Devices Inc., is a low-cost, high-accuracy instrumentation amplifier. It is designed to require only one external resistor to set gains ranging from 1 to 10,000. This amplifier features 8-lead SOIC packaging, which is smaller than discrete designs and offers lower power consumption, making it suitable for battery-powered, portable, or remote applications. The AD620BRZ is ideal for precision data acquisition systems, medical applications such as ECG and noninvasive blood pressure monitors, and other applications requiring high accuracy and low noise.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.3 | ±18 | V | |
| Input Offset Voltage | 50 μV | μV | ||
| Input Offset Drift | 0.6 μV/°C | μV/°C | ||
| Input Bias Current | 1.0 nA | nA | ||
| Common-Mode Rejection Ratio (G = 10) | 100 | 110 | dB | |
| Input Voltage Noise at 1 kHz | 9 nV/√Hz | nV/√Hz | ||
| Settling Time to 0.01% | 15 μs | μs | ||
| Supply Current | 1.3 mA | mA | ||
| Operating Temperature Range | -40°C | 85°C | °C |
Key Features
- Gain set with one external resistor (gain range 1 to 10,000)
- Wide power supply range (±2.3 V to ±18 V)
- Low power consumption (1.3 mA max supply current)
- High accuracy: 40 ppm maximum nonlinearity, 50 μV max input offset voltage, and 0.6 μV/°C max input offset drift
- Low noise: 9 nV/√Hz input voltage noise at 1 kHz, 0.28 μV p-p noise in the 0.1 Hz to 10 Hz band
- Low input bias current: 1.0 nA max
- High common-mode rejection ratio: 100 dB min at G = 10
- Fast settling time: 15 μs to 0.01%
- Available in 8-lead SOIC and DIP packaging
Applications
- Weigh scales
- ECG and medical instrumentation
- Transducer interfaces
- Data acquisition systems
- Industrial process controls
- Battery-powered and portable equipment
Q & A
- What is the gain range of the AD620BRZ?
The gain range of the AD620BRZ is from 1 to 10,000, set by a single external resistor.
- What is the typical supply current of the AD620BRZ?
The typical supply current of the AD620BRZ is 1.3 mA.
- What is the input offset voltage of the AD620BRZ?
The input offset voltage of the AD620BRZ is 50 μV max.
- What is the common-mode rejection ratio of the AD620BRZ at a gain of 10?
The common-mode rejection ratio of the AD620BRZ at a gain of 10 is 100 dB min.
- What is the settling time of the AD620BRZ to 0.01%?
The settling time of the AD620BRZ to 0.01% is 15 μs.
- What are the typical applications of the AD620BRZ?
The AD620BRZ is typically used in weigh scales, ECG and medical instrumentation, transducer interfaces, data acquisition systems, industrial process controls, and battery-powered and portable equipment.
- What is the operating temperature range of the AD620BRZ?
The operating temperature range of the AD620BRZ is -40°C to 85°C.
- What is the input voltage noise of the AD620BRZ at 1 kHz?
The input voltage noise of the AD620BRZ at 1 kHz is 9 nV/√Hz.
- What is the input bias current of the AD620BRZ?
The input bias current of the AD620BRZ is 1.0 nA max.
- In what packages is the AD620BRZ available?
The AD620BRZ is available in 8-lead SOIC and DIP packaging.
