The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620AD features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery powered, portable (or remote) applications.
The AD620, 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, is ideal for use in precision data acquisition systems, such as weigh scales and transducer interfaces. Furthermore, the low noise, low input bias current, and low power of the AD620AD make it well suited for medical applications such as ECG and noninvasive blood pressure monitors.
The low input bias current of 1.0 nA max is made possible with the use of Superϐeta processing in the input stage. The AD620AD works well as a preamplifier due to its low input voltage noise of 9 nV/√Hz at 1 kHz, 0.28 μV p-p in the 0.1 Hz to 10 Hz band, and 0.1 pA/√Hz input current noise. Also, the AD620AD is well suited for multiplexed applications with its settling time of 15 μs to 0.01%, and its cost is low enough to enable designs with one in-amp per channel.
Feature
EASY TO USEGain Set with One External Resistor(Gain Range 1 to 10,000)Wide Power Supply Range (±2.3 V to ±18 V)Higher Performance than ThreeOp Amp IA DesignsAvailable in 8-Lead DIP and SOIC PackagingLow Power, 1.3 mA max Supply
LOW NOISE9 nV/√Hz, @ 1 kHz, Input Voltage Noise0.28 µV p-p Noise (0.1 Hz to 10 Hz)
EXCELLENT DC PERFORMANCE (B GRADE)50 µV max, Input Offset Voltage0.6 µV/°C max, Input Offset Drift1.0 nA max, Input Bias Current100 dB min Common-Mode Rejection Ratio (G = 10)
EXCELLENT AC SPECIFICATIONS120 kHz Bandwidth (G = 100)15 µs Settling Time to 0.01%
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
