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AD621 数据表(PDF) 1 Page - Analog Devices |
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AD621 数据表(HTML) 1 Page - Analog Devices |
1 / 16 page CONNECTION DIAGRAM 8-Lead Plastic Mini-DIP (N), Cerdip (Q) and SOIC (R) Packages TOP VIEW (Not to Scale) 8 7 6 5 1 2 3 4 G = 10/100 –IN +IN G = 10/100 +VS OUTPUT REF –VS AD621 REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a Low Drift, Low Power Instrumentation Amplifier AD621 FEATURES EASY TO USE Pin-Strappable Gains of 10 and 100 All Errors Specified for Total System Performance Higher Performance than Discrete In Amp Designs Available in 8-Lead DIP and SOIC Low Power, 1.3 mA Max Supply Current Wide Power Supply Range ( 2.3 V to 18 V) EXCELLENT DC PERFORMANCE 0.15% Max, Total Gain Error 5 ppm/ C, Total Gain Drift 125 V Max, Total Offset Voltage 1.0 V/ C Max, Offset Voltage Drift LOW NOISE 9 nV/ √Hz, @ 1 kHz, Input Voltage Noise 0.28 V p-p Noise (0.1 Hz to 10 Hz) EXCELLENT AC SPECIFICATIONS 800 kHz Bandwidth (G = 10), 200 kHz (G = 100) 12 s Settling Time to 0.01% APPLICATIONS Weigh Scales Transducer Interface and Data Acquisition Systems Industrial Process Controls Battery-Powered and Portable Equipment PRODUCT DESCRIPTION The AD621 is an easy to use, low cost, low power, high accu- racy instrumentation amplifier that is ideally suited for a wide range of applications. Its unique combination of high perfor- mance, small size and low power, outperforms discrete in amp implementations. High functionality, low gain errors, and low SUPPLY CURRENT – mA 30,000 25,000 0 020 5 10 15 20,000 15,000 10,000 5,000 AD621A 3 OP AMP IN AMP (3 OP 07S) Figure 1. Three Op Amp IA Designs vs. AD621 gain drift errors are achieved by the use of internal gain setting resistors. Fixed gains of 10 and 100 can easily be 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-lead SOIC, 8-lead plastic DIP or 8-lead 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 µV/°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 mono- lithic instrumentation amplifiers. When operating from high source impedances, as in ECG and blood pressure monitors, the AD621 features the ideal combina- tion of low noise and low input bias currents. Voltage noise is specified as 9 nV/ √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 tem- perature range. SOURCE RESISTANCE – 10,000 0.1 1k 100M 10k 100k 10M 1,000 100 10 1 1M TYPICAL STANDARD BIPOLAR INPUT IN AMP AD621 SUPER ETA BIPOLAR INPUT IN AMP Figure 2. Total Voltage Noise vs. Source Resistance One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001 |
类似零件编号 - AD621_15 |
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类似说明 - AD621_15 |
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