전자부품 데이터시트 검색엔진 |
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INA819 데이터시트(PDF) 19 Page - Texas Instruments |
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INA819 데이터시트(HTML) 19 Page - Texas Instruments |
19 / 43 page R1 25 k RB VB +VS -VS +VS -VS +VS -VS +VS -VS +VS -VS Super- NPN Super- NPN RG (External) +VS -VS Overvoltage Protection Overvoltage Protection RB -IN +IN REF OUT Q1 Q2 A1 A2 A3 +VS IB Cancellation IB Cancellation R2 25 k 40 k 40 k 40 k 40 k Copyright © 2017, Texas Instruments Incorporated RG RG 19 INA819 www.ti.com SBOS959 – DECEMBER 2018 Product Folder Links: INA819 Submit Documentation Feedback Copyright © 2018, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The INA819 is a monolithic precision instrumentation amplifier incorporating a current-feedback input stage and a 4-resistor difference amplifier output stage. The differential input voltage is buffered by Q1 and Q2 and is forced across RG, which causes a signal current to flow through RG, R1, and R2. The output difference amplifier, A3, removes the common-mode component of the input signal and refers the output signal to the REF pin. The VBE and voltage drop across R1 and R2 produce output voltages on A1 and A2 that are approximately 0.8 V lower than the input voltages. Each input is protected by two field-effect transistors (FETs) that provide a low series resistance under normal signal conditions, and preserve excellent noise performance. When excessive voltage is applied, these transistors limit input current to approximately 8 mA. 8.2 Functional Block Diagram |
유사한 부품 번호 - INA819 |
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유사한 설명 - INA819 |
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