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INA193AIDBVR Datasheet(PDF) 10 Page - Texas Instruments |
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INA193AIDBVR Datasheet(HTML) 10 Page - Texas Instruments |
10 / 24 page R S A1 0.1 F m V+>3V A2 R L Load V IN+ -16Vto+80V Negative and Positive Common-Mode Voltage V IN+ V IN- V+ I L OUT INA193-INA198 R 1 R 2 INA193, INA194 INA195, INA196 INA197, INA198 SBOS307F – MAY 2004 – REVISED FEBRUARY 2010 www.ti.com SHUTDOWN voltage loss in the measurement line. High values of RS provide better accuracy at lower currents by Because the INA193-INA198 consume a quiescent minimizing the effects of offset, while low values of current less than 1mA, they can be powered by either RS minimize voltage loss in the supply line. For most the output of logic gates or by transistor switches to applications, best performance is attained with an RS supply power. Use a totem-pole output buffer or gate value that provides a full-scale shunt voltage range of that can provide sufficient drive along with 0.1mF 50mV to 100mV. Maximum input voltage for accurate bypass capacitor, preferably ceramic with good measurements is 500mV. high-frequency characteristics. This gate should have a supply voltage of 3V or greater because the TRANSIENT PROTECTION INA193-INA198 requires a minimum supply greater than 2.7V. In addition to eliminating quiescent current, The −16V to +80V common-mode range of the this gate also turns off the 10mA bias current present INA193-INA198 is ideal for withstanding automotive at each of the inputs. An example shutdown circuit is fault conditions ranging from 12V battery reversal up shown in Figure 21. to +80V transients, since no additional protective components are needed up to those levels. In the event that the INA193-INA198 is exposed to transients on the inputs in excess of its ratings, then external transient absorption with semiconductor transient absorbers (zeners or Transzorbs) will be necessary. Use of MOVs or VDRs is not recommended except when they are used in addition to a semiconductor transient absorber. Select the transient absorber such that it will never allow the INA193-INA198 to be exposed to transients greater than +80V (that is, allow for transient absorber tolerance, as well as additional voltage due to transient absorber dynamic impedance). Despite the use of internal zener-type ESD protection, the INA193-INA198 does not lend itself to using external resistors in series with the inputs because the internal gain resistors can vary up to ±30%. (If gain accuracy is not important, then resistors can be added in series with the INA193-INA198 inputs with two equal resistors on each input.) OUTPUT VOLTAGE RANGE The output of the INA193-INA198 is accurate within the output voltage swing range set by the Figure 21. INA193-INA198 Example Shutdown power-supply pin, V+. This is best illustrated when Circuit using the INA195 or INA198 (which are both versions using a gain of 100), where a 100mV full-scale input from the shunt resistor requires an output voltage SELECTING RS swing of +10V, and a power-supply voltage sufficient to achieve +10V on the output. The value chosen for the shunt resistor, RS, depends on the application and is a compromise between small-signal accuracy and maximum permissible 10 Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198 |
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