AD621 Series

Low Drift, Low Power Instrumentation Amp with fixed gains of 10 and 100

Catalog

Low Drift, Low Power Instrumentation Amp with fixed gains of 10 and 100

Part	Current - Input Bias	Mounting Type	Current - Supply	Number of Circuits	Amplifier Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input Offset	-3db Bandwidth	Voltage - Supply Span (Min) [Min]	Current - Output / Channel	Slew Rate	Voltage - Supply Span (Max) [Max]	Package / Case	Package / Case [y]	Package / Case [x]	Supplier Device Package	Package / Case	Package / Case
Analog Devices AD621AR-REEL7	500 pA	Surface Mount	900 µA	1	Instrumentation	85 °C	-40 °C	75 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-SOIC	3.9 mm	0.154 in	8-SOIC
Analog Devices AD621ARZ	500 pA	Surface Mount	900 µA	1	Instrumentation	85 °C	-40 °C	75 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-SOIC	3.9 mm	0.154 in	8-SOIC
Analog Devices AD621SQ/883B	500 pA	Through Hole	900 µA	1	Instrumentation	125 °C	-55 °C	75 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-CDIP			8-CERDIP	7.62 mm	0.3 in
Analog Devices AD621BN	500 pA	Through Hole	900 µA	1	Instrumentation	85 °C	-40 °C	50 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-DIP			8-PDIP	7.62 mm	0.3 in
Analog Devices AD621BNZ	500 pA	Through Hole	900 µA	1	Instrumentation	85 °C	-40 °C	50 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-DIP			8-PDIP	7.62 mm	0.3 in
Analog Devices AD621BR-REEL	500 pA	Surface Mount	900 µA	1	Instrumentation	85 °C	-40 °C	50 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-SOIC	3.9 mm	0.154 in	8-SOIC
Analog Devices AD621ANZ	500 pA	Through Hole	900 µA	1	Instrumentation	85 °C	-40 °C	75 µV	800 kHz	4.6 V	18 mA	1.2 V/µs	36 V	8-DIP			8-PDIP	7.62 mm	0.3 in

Catalog

Low Drift, Low Power Instrumentation Amp with fixed gains of 10 and 100

Key Features

• Easy To UsePin-Strappable Gains of 10 and 100All Errors Specified for Total System PerformanceHigh Performance than Discrete In Amp DesignsAvailable in 8-Lead DIP and SOICLow Power, 1.3 mA Max Supply CurrentWide Power Supply

• Low Noise9 nV/vHz, @ 1 kHz, Input Voltage Noise0.28 µV p-p Noise (0.1 Hz to 10 Hz)

• Excellent DC Performance0.15% Max, Total Gain Error±5 ppm/°C, Total Gain Drift125 µV Max, Total Offset Voltage1.0 µV/°C Max, Offset Voltage Drift

• Excellent AC Specifications800 kHz Bandwidth (G = 10),200 kHz (G = 100)12 µs Settling Time to 0.01%

Description

The AD621 is an easy to use, low cost, low power, high accuracy instrumentation amplifier which is ideally suited for a wide range of applications. Its unique combination of high performance, small size and low power, outperforms discrete in amp implementations. High functionality, low gain errors and low gain drift errors are achieved by the use of internal gain setting resistors. Fixed gains of 10 and 100 can be easily set via external pin strapping. The AD621 is fully specified as a total system, therefore, simplifying the design process.For portable or remote applications, where power dissipation, size and weight are critical, the AD621 features a very low supply current of 1.3 mA max and is packaged in a compact 8-pin SOIC, 8-pin plastic DIP or 8-pin cerdip. The AD621 also excels in applications requiring high total accuracy, such as precision data acquisition systems used in weigh scales and transducer interface circuits. Low maximum error specifications including nonlinearity of 10 ppm, gain drift of 5 ppm°/C, 50 µV offset voltage and 0.6 mV/°C offset drift ("B" grade), make possible total system performance at a lower cost than has been previously achieved with discrete designs or with other monolithic instrumentation amplifiers.When operating from high source impedances, as in ECG and blood pressure monitors, the AD621 features the ideal combination of low noise and low input bias currents. Voltage noise is specified as 9 nV/(root) Hz at 1 kHz and 0.28 µV p-p from 0.1 Hz to 10 Hz. Input current noise is also extremely low at 0.1 pA/Hz. The AD621 outperforms FET input devices with an input bias current specification of 1.5 nA max over the full industrial temperature range.