Overview
The AD620BRZ-RL, 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, making it highly versatile and easy to use. The AD620 features 8-lead SOIC packaging, which is smaller than discrete designs and offers lower power consumption, with a maximum supply current of 1.3 mA. This makes it an excellent choice for battery-powered, portable, or remote applications. The amplifier is known for its high accuracy, low offset voltage, and low noise characteristics, making it ideal for precision data acquisition systems, medical applications, and industrial process controls.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.3 | ±18 | V | |
| Supply Current | 1.3 | mA | ||
| Input Offset Voltage | 50 | μV | ||
| Input Offset Drift | 0.6 | μV/°C | ||
| Input Bias Current | 0.5 | 1.0 | nA | |
| Common-Mode Rejection Ratio (G = 10) | 100 | 110 | dB | |
| Slew Rate | 0.75 | 1.2 | V/μs | |
| Bandwidth (G = 100) | 120 | kHz | ||
| Settling Time (to 0.01%) | 15 | μs | ||
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Easy to Use: Gain is set with just one external resistor, allowing for gains from 1 to 10,000.
- Low Noise: Features low input voltage noise of 9 nV/√Hz at 1 kHz and 0.28 μV p-p in the 0.1 Hz to 10 Hz band.
- High Accuracy: Maximum nonlinearity of 40 ppm, low offset voltage of 50 μV max, and offset drift of 0.6 μV/°C max.
- Low Power Consumption: Maximum supply current of 1.3 mA, suitable for battery-powered and portable applications.
- Wide Power Supply Range: Operates from ±2.3 V to ±18 V.
- Fast Settling Time: 15 μs to 0.01% settling time, making it suitable for multiplexed applications.
Applications
- Weigh scales and transducer interfaces
- ECG and medical instrumentation
- Data acquisition systems
- Industrial process controls
- Battery-powered and portable equipment
Q & A
- What is the gain range of the AD620BRZ-RL?
The gain range of the AD620BRZ-RL is from 1 to 10,000, set by a single external resistor.
- What is the maximum supply current of the AD620BRZ-RL?
The maximum supply current is 1.3 mA.
- What is the input offset voltage of the AD620BRZ-RL?
The input offset voltage is 50 μV max.
- What is the common-mode rejection ratio (CMRR) of the AD620BRZ-RL at a gain of 10?
The CMRR is 100 dB minimum at a gain of 10.
- What is the slew rate of the AD620BRZ-RL?
The slew rate is 1.2 V/μs typical.
- What is the bandwidth of the AD620BRZ-RL at a gain of 100?
The bandwidth is 120 kHz at a gain of 100.
- What is the settling time of the AD620BRZ-RL to 0.01%?
The settling time is 15 μs to 0.01%.
- What is the operating temperature range of the AD620BRZ-RL?
The operating temperature range is -40°C to +85°C.
- What types of applications is the AD620BRZ-RL suitable for?
The AD620BRZ-RL is suitable for applications such as weigh scales, ECG and medical instrumentation, transducer interfaces, data acquisition systems, industrial process controls, and battery-powered and portable equipment.
- How does the AD620BRZ-RL achieve low input bias current?
The AD620BRZ-RL achieves low input bias current through the use of Superβeta processing in the input stage.
