Overview
The AD620AN, produced by Analog Devices Inc., is a low-cost, high-accuracy instrumentation amplifier. It is designed to be easy to use, requiring only one external resistor to set gains ranging from 1 to 10,000. This amplifier is available in 8-lead PDIP, SOIC, and CERDIP packages, making it suitable for a variety of applications, including battery-powered and portable devices. The AD620AN features low power consumption with a maximum supply current of 1.3 mA, 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 | |
| Input Offset Voltage | 50 | μV | ||
| Input Offset Drift | 0.6 | μV/°C | ||
| Input Bias Current | 1.0 | nA | ||
| Common-Mode Rejection Ratio (G=10) | 100 | dB | ||
| Input Voltage Noise at 1 kHz | 9 | nV/√Hz | ||
| Bandwidth (G=100) | 120 | kHz | ||
| Settling Time to 0.01% | 15 | μs | ||
| Operating Supply Current | 1.3 | mA | ||
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Easy to Use: 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: Maximum supply current of 1.3 mA.
- High Accuracy: 50 μV max input offset voltage, 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.
- Excellent AC Specifications: 120 kHz bandwidth (G=100), 15 μs settling time to 0.01%.
- Low Input Bias Current: 1.0 nA max, achieved with Superβeta processing in the input stage.
Applications
- Weigh Scales: Ideal for precision data acquisition systems.
- ECG and Medical Instrumentation: Suitable for medical applications such as ECG and noninvasive blood pressure monitors.
- Transducer Interface: Used in transducer interfaces for accurate signal amplification.
- Data Acquisition Systems: High accuracy makes it suitable for various data acquisition systems.
- Industrial Process Controls: Used in industrial process control applications due to its high accuracy and low noise.
- Battery-Powered and Portable Equipment: Low power consumption makes it ideal for battery-powered and portable devices.
Q & A
- What is the gain range of the AD620AN?
The gain range of the AD620AN is 1 to 10,000, set by one external resistor.
- What is the maximum supply current of the AD620AN?
The maximum supply current of the AD620AN is 1.3 mA.
- What is the input offset voltage of the AD620AN?
The input offset voltage of the AD620AN is 50 μV max.
- What is the common-mode rejection ratio (CMRR) of the AD620AN at a gain of 10?
The CMRR of the AD620AN at a gain of 10 is 100 dB min.
- What is the bandwidth of the AD620AN at a gain of 100?
The bandwidth of the AD620AN at a gain of 100 is 120 kHz.
- What is the settling time of the AD620AN to 0.01%?
The settling time of the AD620AN to 0.01% is 15 μs.
- What are the typical applications of the AD620AN?
The AD620AN 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 AD620AN?
The operating temperature range of the AD620AN is -40°C to +85°C.
- What is the input voltage noise of the AD620AN at 1 kHz?
The input voltage noise of the AD620AN at 1 kHz is 9 nV/√Hz.
- What is the input bias current of the AD620AN?
The input bias current of the AD620AN is 1.0 nA max.
