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AD620AN
+BOMIC INST AMP 1 CIRCUIT 8DIP
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ManufacturerAnalog Devices Inc.
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Mfr. Part #AD620AN
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In Stock7463
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Specifications
| Attribute | Value |
| Part Status | Obsolete |
| Base Product Number | AD620 |
| Amplifier Type | Instrumentation |
| Number of Circuits | 1 |
| Slew Rate | 1.2V/µs |
| Current - Input Bias | 500 pA |
| Voltage - Input Offset | 30 µV |
| Supply Current | 900µA |
| Current - Output / Channel | 18 mA |
| Voltage - Supply Span (Min) | 4.6 V |
| Voltage - Supply Span (Max) | 36 V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Supplier Device Package | 8-PDIP |
| Packaging | Tube |
| -3 dB Bandwidth | 1 MHz |
Overview
Description
Key features of the AD620AN include a low input bias current, low offset voltage, and excellent common-mode rejection ratio (CMRR), which contribute to its high accuracy and reliability. The device operates on a dual supply voltage, typically ±2.3V to ±18V, and offers a differential gain range from 1 to 10,000, adjustable via an external resistor. Its small package size and low power requirements make it suitable for battery-operated devices.
The AD620AN's robust performance in noise reduction and signal integrity makes it ideal for precision measurement applications. Its ease of use and cost-effectiveness further enhance its appeal in both commercial and industrial sectors, where dependable signal amplification is crucial.
Equivalent
1. INA128 by Texas Instruments
2. MAX4198 by Maxim Integrated
3. LT1167 by Analog Devices (formerly Linear Technology)
4. AMP02 by Analog Devices
5. INA126 by Texas Instruments
These equivalents may have different specifications and features, so it's essential to review datasheets to ensure compatibility with your application.
Features
1. High Accuracy: Offers low noise, low offset voltage (50 µV max), and low drift, ensuring precise signal amplification.
2. Gain Flexibility: The gain can be easily set from 1 to 10,000 via a single external resistor, providing versatility in various applications.
3. Low Power Consumption: Consumes a mere 1.3 mA, making it suitable for battery-powered devices.
4. Input and Output Range: Features a wide input voltage range and output swing capability, enhancing its usability in single or dual supply applications.
5. CMRR: Provides a high Common-Mode Rejection Ratio (CMRR) of 100 dB, which helps in minimizing interference from common-mode signals.
6. Package and Compatibility: Available in an 8-pin DIP (AD620AN), suitable for easy integration into existing designs.
These features make the AD620AN ideal for medical instrumentation, industrial process controls, and sensor signal conditioning applications.
Pinout
1. Pin 1 (Ref): Reference voltage input. Typically connected to ground for single-supply operation.
2. Pin 2 (RG): Gain-setting resistor pin. The gain is determined by the resistor connected between Pin 1 and Pin 8.
3. Pin 3 (V- or -Vs): Negative power supply voltage.
4. Pin 4 (Inverting Input, V- or -Vin): Inverting input of the amplifier.
5. Pin 5 (Non-Inverting Input, V+ or +Vin): Non-inverting input of the amplifier.
6. Pin 6 (Output): Output of the instrumentation amplifier.
7. Pin 7 (V+ or +Vs): Positive power supply voltage.
8. Pin 8 (RG): Gain-setting resistor pin. Used in conjunction with Pin 1 to set the gain of the amplifier.
The AD620AN is known for its low noise, low power consumption, and high accuracy, making it suitable for precision data acquisition and instrumentation applications.
Manufacturer
Application
1. Medical Instrumentation: For amplifying low-level physiological signals such as ECG, EEG, and EMG.
2. Industrial Process Controls: Used in sensor signal conditioning for accurate measurements.
3. Weigh Scales: Amplifies signals from load cells for precise weight measurements.
4. Data Acquisition Systems: Ensures accurate signal conversion in various measurement environments.
5. Strain Gauge Amplifiers: Enhances signals from strain gauges for structural testing.
6. Thermocouple Amplification: Increases temperature measurement accuracy by amplifying thermocouple signals.
Its low power consumption, high accuracy, and low noise make it ideal for these applications.
Package
Frequently Asked Questions
Q: What is the typical application for the AD620AN instrumentation amplifier?
A: It is designed for precision data acquisition, medical instrumentation (e.g., ECG), and bridge amplifier circuits requiring high common-mode rejection.
Q: Can this device operate with a single supply voltage?
A: Yes, with a supply span from 4.6V to 36V. It supports single-supply operation by biasing the reference pin properly.
Q: What is the maximum input offset voltage for the AD620AN?
A: The maximum input offset voltage is 30 µV, ensuring high DC accuracy for low-level signal amplification.
Q: Does the AD620AN require external gain-setting resistors?
A: Yes, one external resistor (RG) between pins 1 and 8 sets the gain from 1 to 1000, providing design flexibility.
Q: What is the -3dB bandwidth at a gain of 100?
A: The -3dB bandwidth is 1 MHz at unity gain and decreases to approximately 100 kHz at a gain of 100, typical for instrumentation amplifiers.
Q: Is the AD620AN suitable for battery-powered applications?
A: Yes, with a low supply current of 900 µA, it is suitable for portable, battery-operated medical and sensor interface designs.
Q: How does the AD620AN handle output drive capability?
A: It can deliver up to 18 mA per channel, allowing direct drive of ADC inputs or low-power loads without additional buffers.
