Overview
The AD620AR, produced by Analog Devices Inc., is a low-cost, high-accuracy instrumentation amplifier. It is designed to provide high performance with minimal external components, making it ideal for various precision applications. The AD620AR features an 8-lead SOIC package, which is smaller than discrete designs and offers lower power consumption, making it suitable for battery-powered and portable equipment. With its high accuracy of 40 ppm maximum nonlinearity, low offset voltage of 50 µV max, and offset drift of 0.6 µV/°C max, this amplifier is well-suited for precision data acquisition systems, medical devices, and industrial process controls.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Instrumentation | |
| Number of Circuits | 1 | |
| Slew Rate | 1.2 | V/µs |
| -3db Bandwidth | 1 MHz (G = 1), 120 kHz (G = 100) | kHz |
| Input Bias Current | 500 pA | |
| Input Offset Voltage | 30 µV (typ), 50 µV (max) | µV |
| Supply Current | 900 µA | µA |
| Output Current per Channel | 18 mA | mA |
| Supply Voltage, Single/Dual (±) | 4.6 V ~ 36 V, ±2.3 V ~ 18 V | V |
| Operating Temperature | -40°C ~ 85°C | °C |
Key Features
- High accuracy with 40 ppm maximum nonlinearity and low offset voltage of 50 µV max.
- Low offset drift of 0.6 µV/°C max.
- Low input bias current of 1.0 nA max, achieved through Superβeta processing.
- Low noise: 9 nV/√Hz at 1 kHz and 0.28 µV p-p in the 0.1 Hz to 10 Hz band.
- Wide power supply range: ±2.3 V to ±18 V.
- Low power consumption: 1.3 mA max supply current.
- Easy to use with gain set by one external resistor (gain range 1 to 10,000).
- Available in 8-lead SOIC and DIP packaging.
- Excellent dc and ac specifications, including 120 kHz bandwidth and 15 µs settling time to 0.01%.
Applications
- Precision data acquisition systems, such as weigh scales and transducer interfaces.
- Medical applications, including ECG and noninvasive blood pressure monitors.
- Battery-powered and portable equipment.
- Industrial process controls.
- Multiplexed applications due to its fast settling time and low cost per channel.
Q & A
- What is the primary function of the AD620AR?
The AD620AR is a low-cost, high-accuracy instrumentation amplifier designed for precision applications.
- What is the typical input offset voltage of the AD620AR?
The typical input offset voltage is 30 µV, with a maximum of 50 µV.
- What is the slew rate of the AD620AR?
The slew rate is 1.2 V/µs.
- What is the operating temperature range of the AD620AR?
The operating temperature range is -40°C to 85°C.
- What is the maximum supply current of the AD620AR?
The maximum supply current is 1.3 mA.
- How is the gain of the AD620AR set?
The gain is set with one external resistor, allowing a gain range of 1 to 10,000.
- What are some common applications of the AD620AR?
Common applications include precision data acquisition systems, medical devices, and industrial process controls.
- What is the input bias current of the AD620AR?
The input bias current is 1.0 nA max.
- What is the bandwidth of the AD620AR at a gain of 100?
The bandwidth at a gain of 100 is 120 kHz.
- What is the settling time of the AD620AR to 0.01%?
The settling time is 15 µs to 0.01%.
