Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - current control/management Current monitoring TSSOP 8

INA138-Q1, IN168-Q1

www.ti.com

SGLS174F –SEPTEMBER 2003–REVISED NOVEMBER 2013

HIGH-SIDE MEASUREMENT CURRENT SHUNT MONITOR

Check for Samples: INA138-Q1, IN168-Q1

FEATURES

DESCRIPTION

• Qualified For Automotive Applications

The INA138-Q1 and INA168-Q1 are high-side,

• ESD Protection Exceeds 2000 V Per MIL-STD-

unipolar, current shunt monitors. Wide input common-

883, Method 3015; Exceeds 200 V Using

mode voltage range, low quiescent current, and tiny

Machine Model (C = 200 pF, R = 0)

TSSOP and SOT23 packaging enable uses in a

• Complete Unipolar High-Side Current-

variety of applications.

Measurement Circuit

Input common-mode and power-supply voltages are

• Wide Supply And Common-Mode Range

independent and can range from 2.7 V to 36 V for the

INA138-Q1 and 2.7 V to 60 V for the INA168-Q1.

– INA138-Q1: 2.7 V to 36 V

Quiescent current is only 25 μA, which permits

– INA168-Q1: 2.7 V to 60 V

connecting the power supply to either side of the

• Independent Supply and Input Common-Mode

current-measurement shunt with minimal error.

Voltages

The device converts a differential input voltage to a

• Single Resistor Gain Set

current output. This current is converted back to a

• Low Quiescent Current (25 µA Typical)

voltage with an external load resistor that sets any

gain from 1 to over 100. Although designed for

• Wide Temperature Range: –40°C to 125°C

current shunt measurement, the circuit invites

• TSSOP−8 and SOT23−5 Packages

creative applications in measurement and level

shifting.

APPLICATIONS

Both the INA138-Q1 and INA168-Q1 are available in

• Current Shunt Measurement

TSSOP−8 and SOT23−5 and are specified for the

• Portable and Battery-Backup Systems

–40°C to 125°C temperature range.

• Battery Chargers

• Power Management

• Precision Current Source

NC − No internal connection

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (20 pages)

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INA138-Q1, IN168-Q1 www.ti.com SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 HIGH-SIDE MEASUREMENT CURRENT SHUNT MONITOR Check for Samples: INA138-Q1, IN168-Q1 FEATURES 1 • • • • • • • • • Qualified For Automotive Applications ESD Protection Exceeds 2000 V Per MIL-STD883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Complete Unipolar High-Side CurrentMeasurement Circuit Wide Supply And Common-Mode Range – INA138-Q1: 2.7 V to 36 V – INA168-Q1: 2.
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INA138-Q1, IN168-Q1 SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 www.ti.
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INA138-Q1, IN168-Q1 www.ti.com SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 ELECTRICAL CHARACTERISTICS (continued) TA = −40°C to 125°C, VS = 5 V, VIN+ = 12 V, and ROUT = 125 kΩ unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 206 μA/V Output Transconductance VSENSE = 10 mV − 150 mV Transconductance versus temperature VSENSE = 100 mV Nonlinearity error VSENSE = 10 mV to 150 mV Total output error VSENSE = 100 mV 194 10 Output impedance nA/°C ±0.01% ±0.2 % ±0.
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INA138-Q1, IN168-Q1 SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 www.ti.com TYPICAL CHARACTERISTICS TA = 25°C, V+ = 5 V, VIN+ = 12 V, and RL = 125 kΩ, unless otherwise noted. RL = 500kW Gain (dB) RL = 50kW RL = 5kW – CL = 10nF CL = 1nF CL = 100pF COMMON-MODE REJECTION versus FREQUENCY Common-Mode Rejection (dB) GAIN versus FREQUENCY – Figure 1. Figure 2.
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INA138-Q1, IN168-Q1 www.ti.com SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 TYPICAL CHARACTERISTICS (continued) TA = 25°C, V+ = 5 V, VIN+ = 12 V, and RL = 125 kΩ, unless otherwise noted. STEP RESPONSE STEP RESPONSE m m Figure 7. Figure 8.
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INA138-Q1, IN168-Q1 SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 www.ti.com APPLICATION INFORMATION Figure 9 illustrates the basic circuit diagram for both the INA138-Q1 and INA168-Q1. Load current IS is drawn from supply VS through shunt resistor RS. The voltage drop VS in the shunt resistor is forced across RG1 by the internal op amp, causing current to flow into the collector of Q1. External resistor RL converts the output current to a voltage, VOUT, at the OUT pin.
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INA138-Q1, IN168-Q1 www.ti.com SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 (A) – ≤ (A) ≤ W W INA138-Q1 – Figure 9. Basic Circuit Connections OUTPUT VOLTAGE RANGE The output of the INA138-Q1 is a current, which is converted to a voltage by the load resistor, RL. The output current remains accurate within the compliance voltage range of the output circuitry. The shunt voltage and the input common-mode and power-supply voltages limit the maximum possible output swing.
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INA138-Q1, IN168-Q1 SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 www.ti.com IS f–3dB INA138-Q1 INA138-Q1 OPA340 f–3dB = 2pRLCL VO ZIN RL CL RL Figure 10. Buffering Output to Drive and A/D Converter Figure 11. Output Filter INA138-Q1 INA138-Q1 m || m Figure 12.
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INA138-Q1, IN168-Q1 www.ti.com SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 | W W INA168-Q1 INA168-Q1 W W W Figure 13.
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INA138-Q1, IN168-Q1 SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 INA138-Q1 www.ti.com INA138-Q1 12-Bit W W A/D converter programmed for differential input. Depending on polarity of current, one INA138-Q1 provides an output voltage, the output of the other is zero. Figure 14.
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INA138-Q1, IN168-Q1 www.ti.com SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 Other INA168-Q1s Digital I/O on the ADS7870 provides power to select the desired INA168-Q1. Diodes prevent output current of the on INA168-Q1 from flowing into the off INA168-Q1. INA168-Q1 INA168-Q1 12-Bit Figure 15.
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INA138-Q1, IN168-Q1 SGLS174F – SEPTEMBER 2003 – REVISED NOVEMBER 2013 www.ti.com REVISION HISTORY Changes from Revision E (September 2012) to Revision F • 12 Page Corrected Y-axis label of QUIESCENT CURRENT versus POWER-SUPPLY VOLTAGE graph ........................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 22-Oct-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 22-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device INA168QDBVRQ1 Package Package Pins Type Drawing SPQ SOT-23 3000 DBV 5 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 180.0 8.4 Pack Materials-Page 1 3.2 B0 (mm) K0 (mm) P1 (mm) 3.1 1.39 4.0 W Pin1 (mm) Quadrant 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 22-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) INA168QDBVRQ1 SOT-23 DBV 5 3000 210.0 185.0 35.
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