전자부품 데이터시트 검색엔진 |
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AD8231 데이터시트(PDF) 1 Page - Analog Devices |
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AD8231 데이터시트(HTML) 1 Page - Analog Devices |
1 / 20 page Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier Preliminary Technical Data AD8426 Rev. PrD Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalog Devices foritsuse,nor for anyinfringements ofpatents orother 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 ©2011 Analog Devices, Inc. All rights reserved. FEATURES 2 channels in a small, 4 mm × 4 mm LFCSP LFCSP package has no metal pad More routing room No current leakage to pad Gain set with 1 external resistor Gain range: 1 to 1000 Input voltage goes below ground Inputs protected beyond supplies Very wide power supply range Single supply: 2.2 V to 36 V Dual supply: ±1.35 V to ±18 V Bandwidth (G = 1): 1.5 MHz CMRR (G = 1): 80 dB minimum Input noise: 22 nV/√Hz Typical supply current (per amp): 350 μA Specified temperature range: −40°C to +125°C APPLICATIONS Industrial process controls Bridge amplifiers Medical instrumentation Portable data acquisition Multichannel systems PIN CONFIGURATION 1 2 3 4 12 11 10 9 5 678 13 14 15 16 –IN1 +IN1 RG1 RG1 AD8426 –IN2 +IN2 RG2 RG2 Figure 1. Table 1. Instrumentation Amplifiers by Category1 General Purpose Zero Drift Military Grade Low Power High Speed PGA AD8220 AD8231 AD620 AD627 AD8250 AD8221 AD8290 AD621 AD623 AD8251 AD8222 AD8293 AD524 AD8235 AD8253 AD8224 AD8553 AD526 AD8236 AD8228 AD8556 AD624 AD8426 AD8295 AD8557 AD8226 AD8227 1 See www.analog.com for the latest instrumentation amplifiers. GENERAL DESCRIPTION The AD8426 is a dual channel, low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain from 1 to 1000. The AD8426 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the signal to make full use of the supply rails. Because the input range also includes the ability to go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8426 operates on supplies ranging from ±1.35 V to ±18 V for dual supplies and 2.2 V to 36 V for single supply. The robust AD8426 inputs are designed to connect to real- world sensors. In addition to its wide operating range, the AD8426 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open-wire detection. The AD8426 is designed to make PCB routing easy and efficient. The two amplifiers are arranged in a logical way so that typical application circuits have short routes and few vias. Unlike most chip scale packages, the AD8426 does not have an exposed metal pad on the back of the part, which frees additional space for routing and vias. The AD8426 offers two in amps in the equivalent board space of a typical MSOP package. The AD8426 is ideal for multichannel, space-constrained industrial applications. Unlike other low cost, low power instrumentation amplifiers, the AD8426 is designed with a minimum gain of 1 and can easily handle ±10 V signals. With its space-saving LFCSP package and 125°C temperature rating, the AD8426 thrives in tightly packed, zero airflow designs. The AD8226 is the single channel version of the AD8426. |
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