AD620AN Low Cost Low Power Instrumentation Amplifier IC Chip
PRODUCT DESCRIPTION
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 AD620 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 AD620 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 AD620
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 AD620 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.
FEATURES
Easy to use Gain set with one external resistor (Gain range 1 to
10,000) Wide power supply range (±2.3 V to ±18 V) Higher
performance than 3 op amp IA designs Available in 8-lead DIP and
SOIC packaging Low power, 1.3 mA max supply current Excellent dc
performance (B grade) 50 μV max, input offset voltage 0.6 μV/°C
max, input offset drift 1.0 nA max, input bias current 100 dB min
common-mode rejection ratio (G = 10) Low noise 9 nV/√Hz @ 1 kHz,
input voltage noise 0.28 μV p-p noise (0.1 Hz to 10 Hz) Excellent
ac specifications 120 kHz bandwidth (G = 100) 15 μs settling time
to 0.01%
APPLICATIONS
Weigh scales
ECG and medical instrumentation
Transducer interface
Data acquisition systems
Industrial process controls
Battery-powered and portable equipment
ORDERING GUIDE
AD620AN −40°C to +85°C 8-Lead PDIP N-8
AD620ANZ −40°C to +85°C 8-Lead PDIP N-8
AD620BN −40°C to +85°C 8-Lead PDIP N-8
AD620BNZ −40°C to +85°C 8-Lead PDIP N-8
AD620AR −40°C to +85°C 8-Lead SOIC_N R-8
AD620ARZ −40°C to +85°C 8-Lead SOIC_N R-8
AD620AR-REEL −40°C to +85°C 8-Lead SOIC_N, 13" Tape and Reel R-8
AD620ARZ-REEL −40°C to +85°C 8-Lead SOIC_N, 13" Tape and Reel R-8
AD620AR-REEL7 −40°C to +85°C 8-Lead SOIC_N, 7" Tape and Reel R-8
AD620ARZ-REEL7 −40°C to +85°C 8-Lead SOIC_N, 7" Tape and Reel R-8
AD620BR −40°C to +85°C 8-Lead SOIC_N R-8
AD620BRZ −40°C to +85°C 8-Lead SOIC_N R-8
AD620BR-REEL −40°C to +85°C 8-Lead SOIC_N, 13" Tape and Reel R-8
AD620BRZ-RL −40°C to +85°C 8-Lead SOIC_N, 13" Tape and Reel R-8
AD620BR-REEL7 −40°C to +85°C 8-Lead SOIC_N, 7" Tape and Reel R-8
AD620BRZ-R7 −40°C to +85°C 8-Lead SOIC_N, 7" Tape and Reel R-8
AD620ACHIPS −40°C to +85°C Die Form
AD620SQ/883B −55°C to +125°C 8-Lead CERDIP Q-8
