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INA202AID Datasheet(PDF) 10 Page - Texas Instruments |
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INA202AID Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 26 page  G 0.6V Reference Comparator OUT CMP IN CMP OUT RESET V IN- V IN+ INA200 (G=20) GND V+ 2 3 4 6 5 7 8 1 R PULL-UP 4.7kW Latch Transparent/Reset C BYPASS 0.01 F m R SHUNT 3mW LoadSupply -18Vto+80V Load 5VSupply R 1 R 2 INA200 INA201 INA202 SBOS374C – NOVEMBER 2006 – REVISED OCTOBER 2010 www.ti.com APPLICATIONS INFORMATION BASIC CONNECTIONS ACCURACY VARIATIONS AS A RESULT OF VSENSE AND COMMON-MODE VOLTAGE Figure 26 shows the basic connections of the INA200, INA201, and INA202. The input pins, VIN+ The accuracy of the INA200, INA201, and INA202 and VIN–, should be connected as closely as possible current shunt monitors is a function of two main to the shunt resistor to minimize any resistance in variables: VSENSE (VIN+ – VIN–) and common-mode series with the shunt resistance. voltage, VCM, relative to the supply voltage, VS. VCM is expressed as (VIN+ + VIN–)/2; however, in practice, Power-supply bypass capacitors are required for VCM is seen as the voltage at VIN+ because the stability. Applications with noisy or high-impedance voltage drop across VSENSE is usually small. power supplies may require additional decoupling capacitors to reject power-supply noise. Connect This section addresses the accuracy of these specific bypass capacitors close to the device pins. operating regions: • Normal Case 1: VSENSE ≥ 20mV, VCM ≥ VS POWER SUPPLY • Normal Case 2: VSENSE ≥ 20mV, VCM < VS The input circuitry of the INA200, INA201, and • Low VSENSE Case 1: VSENSE < 20mV, –16V ≤ VCM INA202 can accurately measure beyond the < 0 power-supply voltage, V+. For example, the V+ power • Low VSENSE Case 2: VSENSE < 20mV, 0V ≤ VCM ≤ supply can be 5V, whereas the load power-supply VS voltage is up to +80V. The output voltage range of • Low VSENSE Case 3: VSENSE < 20mV, VS < VCM ≤ the OUT terminal, however, is limited by the voltages 80V on the power-supply pin. Figure 26. INA200 Basic Connections 10 Submit Documentation Feedback Copyright © 2006–2010, Texas Instruments Incorporated Product Folder Link(s): INA200 INA201 INA202 |
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