Overview
The AD620ARZ is a low-cost, high-accuracy instrumentation amplifier produced by Analog Devices Inc. It is designed to offer high performance with minimal external components, making it ideal for a variety of precision applications. The AD620 requires only one external resistor to set gains ranging from 1 to 10,000, and it features low power consumption with a maximum supply current of 1.3 mA. This makes it suitable for battery-powered and portable equipment. The amplifier is available in 8-lead SOIC and DIP packaging, which is smaller and more efficient than discrete designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.3 V | ±18 V | 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 dB | dB | ||
| Bandwidth (G = 100) | 120 kHz | kHz | ||
| Settling Time to 0.01% | 15 µs | µs | ||
| Input Voltage Noise at 1 kHz | 9 nV/√Hz | nV/√Hz | ||
| Power Consumption | 1.3 mA | mA |
Key Features
- Easy to Use: Gain set with one external resistor (gain range 1 to 10,000).
- Low Noise: 9 nV/√Hz input voltage noise at 1 kHz, 0.28 µV p-p noise (0.1 Hz to 10 Hz).
- Excellent DC Performance: 50 µV max input offset voltage, 0.6 µV/°C max input offset drift, 1.0 nA max input bias current.
- Excellent AC Specifications: 120 kHz bandwidth (G = 100), 15 µs settling time to 0.01%.
- Low Power Consumption: Maximum supply current of 1.3 mA.
- Compact Packaging: Available in 8-lead DIP and SOIC packages.
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 AD620ARZ?
The AD620ARZ can be set to gains ranging from 1 to 10,000 using a single external resistor.
- What is the input offset voltage of the AD620ARZ?
The input offset voltage is 50 µV max.
- What is the common-mode rejection ratio (CMRR) of the AD620ARZ at a gain of 10?
The CMRR at a gain of 10 is 100 dB min.
- What is the bandwidth of the AD620ARZ at a gain of 100?
The bandwidth at a gain of 100 is 120 kHz.
- How much power does the AD620ARZ consume?
The maximum supply current is 1.3 mA.
- What are the typical packaging options for the AD620ARZ?
The AD620ARZ is available in 8-lead DIP and SOIC packages.
- What are some common applications of the AD620ARZ?
Common applications include weigh scales, ECG and medical instrumentation, transducer interfaces, data acquisition systems, industrial process controls, and battery-powered equipment.
- What is the input voltage noise of the AD620ARZ at 1 kHz?
The input voltage noise at 1 kHz is 9 nV/√Hz.
- How long does the AD620ARZ take to settle to 0.01%?
The settling time to 0.01% is 15 µs.
- Is the AD620ARZ suitable for multiplexed applications?
Yes, the AD620ARZ is well suited for multiplexed applications due to its fast settling time and low power consumption.
