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INA202-Q1 Datasheet(PDF) 10 Page - Texas Instruments |
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INA202-Q1 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 21 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-Q1 INA201-Q1 INA202-Q1 SBOS558 – APRIL 2011 www.ti.com APPLICATIONS INFORMATION BASIC CONNECTIONS ACCURACY VARIATIONS AS A RESULT OF VSENSE AND COMMON-MODE VOLTAGE Figure 27 shows the basic connections of the INA200-Q1, INA201-Q1, and INA202-Q1. The input The accuracy of the INA200-Q1, INA201-Q1, and pins, VIN+ and VIN–, should be connected as closely INA202-Q1 current shunt monitors is a function of two as possible to the shunt resistor to minimize any main variables: VSENSE (VIN+ – VIN–) and resistance in series with the shunt resistance. common-mode voltage, VCM, relative to the supply voltage, VS. VCM is expressed as (VIN+ + VIN–)/2; Power-supply bypass capacitors are required for however, in practice, VCM is seen as the voltage at stability. Applications with noisy or high-impedance VIN+ because the voltage drop across VSENSE is power supplies may require additional decoupling usually small. capacitors to reject power-supply noise. Connect bypass capacitors close to the device pins. This section addresses the accuracy of these specific operating regions: POWER SUPPLY • Normal Case 1: VSENSE ≥ 20mV, VCM ≥ VS • Normal Case 2: VSENSE ≥ 20mV, VCM < VS The input circuitry of the INA200-Q1, INA201-Q1, and INA202-Q1 can accurately measure beyond the • Low VSENSE Case 1: VSENSE < 20mV, –16V ≤ VCM power-supply voltage, V+. For example, the V+ power < 0 supply can be 5V, whereas the load power-supply • Low VSENSE Case 2: VSENSE < 20mV, 0V ≤ VCM ≤ voltage is up to +80V. The output voltage range of VS the OUT terminal, however, is limited by the voltages • Low VSENSE Case 3: VSENSE < 20mV, VS < VCM ≤ on the power-supply pin. 80V Figure 27. INA200-Q1 Basic Connections 10 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): INA200-Q1 INA201-Q1 INA202-Q1 |
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