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AD623

Analog Devices
Part Number AD623
Manufacturer Analog Devices
Description Low Cost Instrumentation Amplifier
Published Jan 11, 2017
Detailed Description Data Sheet FEATURES Easy to use Rail-to-rail output swing Input voltage range extends 150 mV below ground (single supply...
Datasheet PDF File AD623 PDF File

AD623
AD623

Overview
Data Sheet FEATURES Easy to use Rail-to-rail output swing Input voltage range extends 150 mV below ground (single supply) Low power, 550 µA maximum quiescent current Gain set with one external resistor Gain range: 1 to 1000 High accuracy dc performance 0.
10% gain error (G = 1) 0.
35% gain error (G > 1) Noise: 35 nV/√Hz RTI noise at 1 kHz Optimal dynamic specifications 800 kHz bandwidth (G = 1) 20 µs settling time to 0.
01% (G = 10) APPLICATIONS Low power medical instrumentation Transducer interfaces Thermocouple amplifiers Industrial process controls Difference amplifiers Low power data acquisition Single and Dual-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier AD623 GENERAL DESCRIPTION The AD623 is an integrated, single- or dual-supply instrumentation amplifier that delivers rail-to-rail output swing using supply voltages from 2.
7 V to 12 V.
The AD623 offers user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pinout configuration.
With no external resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed for gains of up to 1000.
The accuracy of the AD623 is the result of increasing ac common-mode rejection ratio (CMRR) coincident with increasing gain.
Line noise harmonics are rejected due to constant CMRR up to 200 Hz.
The AD623 has a wide input common-mode range and amplifies signals with commonmode voltages as low as 150 mV below ground.
The AD623 maintains optimal performance with dual and single polarity power supplies.
Table 1.
Low Power Upgrades for the AD623 Typical Quiescent Part No.
Total Supply Voltage, VS (V dc) Current, IQ (µA) AD8235 5.
5 30 AD8236 5.
5 33 AD8237 5.
5 33 AD8226 36 350 AD8227 36 325 AD8420 36 85 AD8422 36 300 AD8426 36 325 (per channel) 2 –IN VDIFF – 2+ VCM VDIFF – 2+ +IN 3 FUNCTIONAL BLOCK DIAGRAM +VS 7 50kΩ 50kΩ A1 –RG 50kΩ RG 1 8 50kΩ A3 +RG 4 –VS 50kΩ 50kΩ A2 Figure 1.
6 O...


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