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AD624 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD624 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 10 page 10 MHz, 20 V/μs, G = 1, 10, 100, 1000 i CMOS® Programmable Gain Instrumentation Amplifier Preliminary Technical Data AD8253 Rev. prA Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Small package: 10-lead MSOP Programmable gains: 1, 10, 100, 1000 Digital or pin-programmable gain setting Wide supply: ±5 V to ±15 V Excellent dc performance High CMRR 120 dB , G = 100 Low gain drift: 10 ppm/°C Low offset drift: 1.2 μV/°C , G = 1000 Excellent ac performance Fast settling time: 615 ns to 0.001% High slew rate: 20 V/μs Low distortion: High CMRR over frequency: 80 dB to 50 kHz Low noise: 8 nV/√Hz, G = 1000 Low power: 4 mA APPLICATIONS Data acquisition Biomedical analysis Test and measurement GENERAL DESCRIPTION The AD8253 is an instrumentation amplifier with digitally programmable gains that has GΩ input impedance, low output noise, and low distortion making it suitable for interfacing with sensors and driving high sample rate analog-to-digital converters (ADCs). It has high bandwidth of 10 MHz, low THD and fast settling time of 615 ns to 0.001%. Offset drift and gain drift are specified to 1.2 μV/°C and 10 ppm/°C, respectively for G = 1000. In addition to its wide input common voltage range, it boasts a high common-mode rejection of 80 dB at G = 1 from dc to 50 kHz. The combination of precision dc performance coupled with high speed capabilities make the AD8253 an excellent candidate for data acquisition. Furthermore, this monolithic solution simplifies design and manufacturing, and boosts performance of instrumentation by maintaining a tight match of internal resistors and amplifiers. The AD8253 user interface consists of a parallel port that allows users to set the gain in one of two different ways (see Figure 1 for the functional block diagram). A 2-bit word sent via a bus can be latched using the WR input. An alternative is to use transparent gain mode where the state of logic levels at the gain port determines the gain. FUNCTIONAL BLOCK DIAGRAM A1 A0 DGD WR Logic AD8253 OUT +VS -VS REF +IN -IN Figure 1. Table 1. Instrumentation and Difference Amplifiers by Category High Performance Low Cost High Voltage Mil Grade Low Power Digital Gain AD82201 AD6231 AD628 AD620 AD6271 AD82311 AD8221 AD85531 AD629 AD621 AD8250 AD8222 AD524 AD8251 AD82241 AD526 AD85551 AD624 AD85561 AD85571 1 Rail-to-rail output. The AD8253 is available in a 10-lead MSOP package and is specified over the −40°C to +85°C temperature range, making it an excellent solution for applications where size and packing density are important considerations. |
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