AD620ANZ

AD620ANZ – Analog Devices Precision Instrumentation Amplifier, Low-Power, High-Precision Signal Chain Core

AD620ANZ Product Overview
The AD620ANZ is a low-cost, high-precision instrumentation amplifier from Analog Devices, a world-leading semiconductor manufacturer. Featuring a monolithic design that outperforms traditional three-op-amp architectures, this amplifier requires only 【one external resistor】 to set gains from 【1 to 10,000】 – offering unparalleled design simplicity and flexibility. With 【low input bias current (500 pA typ)】 enabled by Super Beta processing, 【low offset voltage (30 uV max)】, and 【low noise (9 nV/√Hz)】, the AD620ANZ delivers 【accurate, stable, and reliable】 signal amplification for sensor interfaces, data acquisition, medical instrumentation, and industrial process control. Its 【wide power supply range (±2.3 V to ±18 V)】 and 【ultra-low power consumption (1.3 mA max supply current)】 make it ideal for both precision bench instruments and 【battery-powered portable】 applications.

AD620ANZ Key Specifications
Brand: Analog Devices (ADI)
Type: Instrumentation Amplifier
Package: 【8-Pin PDIP (DIP-8)】, through-hole mount
Gain Range: 【1 to 10,000】 (set by one external resistor)
-3dB Bandwidth: 【1 MHz】
Slew Rate: 【1.2 V/us】
Input Offset Voltage (Vos): 【30 uV max】
Input Bias Current (Ib): 【500 pA typ】 (1.0 nA max)
Input Offset Drift: 【0.3 uV/°C max】
CMRR: 【100 dB min】 (G = 70)
Input Voltage Noise: 【9 nV/√Hz @ 1 kHz】
Peak-to-Peak Noise (0.1 Hz to 10 Hz): 【0.28 uV】
Supply Current (Iq): 【1.3 mA max】
Supply Voltage Range: 【±2.3 V to ±18 V】 (or 【4.6 V to 36 V】 single supply)
Output Current: 【18 mA】
Settling Time (to 0.01%): 【15 us】
Operating Temperature: 【-40°C to +85°C】
Weight: 【0.964 g】
RoHS Compliant: Yes

AD620ANZ Technical Advantages

1. One-resistor gain setting for ultimate design simplicity
The AD620ANZ requires just 【one external resistor】 to set any gain from 【1 to 10,000】. This eliminates the need for multiple precision resistors and complex gain networks, 【reducing component count, PCB space, and design time】 while improving reliability over discrete implementations.

2. Super Beta input stage for ultra-low bias current
The input stage employs 【Super Beta processing】 to achieve an exceptionally low input bias current of 【500 pA typical (1.0 nA max)】. This minimizes errors caused by source impedance, making the AD620ANZ ideal for 【high-impedance sensor interfaces】 such as pressure sensors, thermocouples, and strain gauges.

3. Excellent DC precision for accurate measurements
With 【30 uV max input offset voltage】 and 【0.3 uV/°C max offset drift】, the AD620ANZ maintains 【exceptional accuracy】 across temperature variations. Combined with 【100 dB minimum CMRR】, it effectively rejects common-mode noise – critical for 【precision data acquisition】 and 【bridge sensor】 applications.

4. Low noise for sensitive signal conditioning
The AD620ANZ delivers 【9 nV/√Hz input voltage noise at 1 kHz】 and only 【0.28 uV peak-to-peak noise in the 0.1 Hz to 10 Hz band】. This low-noise performance makes it an 【excellent preamplifier】 for 【ECG, medical instrumentation, and other low-level signal】 applications where signal integrity is paramount.

5. Wide power supply range and low power consumption
Operating from 【±2.3 V to ±18 V】 dual supplies or 【4.6 V to 36 V】 single supply, the AD620ANZ offers exceptional flexibility for both 【battery-powered portable devices】 and 【industrial systems】. With only 【1.3 mA max supply current】, it minimizes power dissipation and heat generation – 【extending battery life】 in portable instruments.

6. Fast settling for multiplexed applications
With a 【settling time of 15 us to 0.01%】, the AD620ANZ is well-suited for 【multiplexed data acquisition systems】 where multiple channels must be sampled rapidly. This enables 【high-throughput measurement systems】 without sacrificing accuracy.

7. Superior to discrete three-op-amp designs
The AD620ANZ offers 【higher performance】 than traditional three-op-amp instrumentation amplifier designs in a 【compact 8-pin DIP package】. It delivers

AD620ANZ Applications
The AD620ANZ is widely used across diverse industries, thanks to its superior precision, low power, and versatile gain range:

【Weigh scales】 and 【bridge transducers】 – provides accurate amplification of strain gauge and load cell signals

【ECG and medical instrumentation】 – conditions low-level biopotential signals for diagnostic equipment

【Sensor interfaces】 – amplifies signals from pressure, temperature, and position sensors

【Data acquisition systems】 – front-end amplification for precision measurement systems

【Industrial process control】 – signal conditioning for factory automation and control loops

【Battery-powered and portable equipment】 – low power consumption extends operating life

【Multiplexed analog systems】 – fast settling time enables high-speed channel scanning

Why Choose the AD620ANZ?
When you choose the AD620ANZ, you are selecting an instrumentation amplifier that combines 【Analog Devices' decades of precision analog expertise】 with proven, reliable performance. You get:

【Single-resistor gain setting】 – from 1 to 10,000 for unmatched design flexibility

【Ultra-low bias current (500 pA)】 – ideal for high-impedance sensors

【Excellent DC precision (30 uV offset, 0.3 uV/°C drift)】 – accurate over temperature

【Low noise (9 nV/√Hz)】 – preserves signal integrity in sensitive applications

【Wide supply range (±2.3 V to ±18 V)】 – works in portable and industrial systems

【Ultra-low power (1.3 mA)】 – extends battery life in portable devices

【Fast settling (15 us)】 – suitable for multiplexed data acquisition

【Compact 8-pin DIP package】 – easy to prototype and integrate

【Industry-standard pinout】 – drop-in replacement for many instrumentation amplifier designs