Datasheet

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INA139

INA169

FEATURES

● COMPLETE UNIPOLAR HIGH-SIDE

CURRENT MEASUREMENT CIRCUIT

● WIDE SUPPLY AND COMMON-MODE RANGE

● INA139: 2.7V to 40V

● INA169: 2.7V to 60V

● INDEPENDENT SUPPLY AND INPUT COMMON-

MODE VOLTAGES

● SINGLE RESISTOR GAIN SET

● LOW QUIESCENT CURRENT (60µA typ)

● SOT23-5 PACKAGE

High-Side Measurement

CURRENT SHUNT MONITOR

DESCRIPTION

The INA139 and INA169 are high-side, unipolar, current

shunt monitors. Wide input common-mode voltage range,

high-speed, low quiescent current, and tiny SOT23 packag-

ing enable use in a variety of applications.

Input common-mode and power-supply voltages are inde-

pendent and can range from 2.7V to 40V for the INA139 and

2.7V to 60V for the INA169. Quiescent current is only 60µA,

which permits connecting the power supply to either side of

the current measurement shunt with minimal error.

The device converts a differential input voltage to a current

output. This current is converted back to a voltage with an

external load resistor that sets any gain from 1 to over 100.

Although designed for current shunt measurement, the cir-

cuit invites creative applications in measurement and level

shifting.

Both the INA139 and INA169 are available in SOT23-5

packages and are specified for the –40°C to +85°C industrial

temperature range.

APPLICATIONS

● CURRENT SHUNT MEASUREMENT:

Automotive, Telephone, Computers

● PORTABLE AND BATTERY-BACKUP

SYSTEMS

● BATTERY CHARGERS

● POWER MANAGEMENT

● CELL PHONES

● PRECISION CURRENT SOURCE

OUT

GND

= I

/1kΩ

Load

1kΩ

IN+

Up to 60V

IN+

IN–

V+

SBOS181D – DECEMBER 2000 – REVISED NOVEMBER 2005

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

All trademarks are the property of their respective owners.

Summary of content (15 pages)

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INA139 INA169 SBOS181D – DECEMBER 2000 – REVISED NOVEMBER 2005 High-Side Measurement CURRENT SHUNT MONITOR FEATURES DESCRIPTION ● COMPLETE UNIPOLAR HIGH-SIDE CURRENT MEASUREMENT CIRCUIT ● WIDE SUPPLY AND COMMON-MODE RANGE ● INA139: 2.7V to 40V ● INA169: 2.7V to 60V ● INDEPENDENT SUPPLY AND INPUT COMMONMODE VOLTAGES ● SINGLE RESISTOR GAIN SET ● LOW QUIESCENT CURRENT (60µA typ) ● SOT23-5 PACKAGE The INA139 and INA169 are high-side, unipolar, current shunt monitors.
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PACKAGE/ORDERING INFORMATION(1) PACKAGE-LEAD PACKAGE DESIGNATOR SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER SOT23-5 Surface-Mount DBV –40°C to +85°C E39 INA139NA/250 Tape and Reel, 250 " " " " INA139NA/3K Tape and Reel, 3000 SOT23-5 Surface-Mount DBV –40°C to +85°C A69 INA169NA/250 Tape and Reel, 250 " " " " INA169NA/3K Tape and Reel, 3000 PRODUCT INA139 " INA169 " TRANSPORT MEDIA, QUANTITY NOTE: (1) For the most current package and ordering information, see
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ELECTRICAL CHARACTERISTICS At TA = –40°C to +85°C, VS = 5V, VIN+ = 12V, and ROUT = 25kΩ, unless otherwise noted. INA139NA PARAMETER CONDITION INPUT Full-Scale Sense Voltage Common-Mode Input Range Common-Mode Rejection MIN VSENSE = (VIN+) – (VIN–) VIN+ = 2.7V to 40V, VSENSE = 50mV VIN+ = 2.7V to 60V, VSENSE = 50mV 2.7 100 MAX MIN 100 500 40 ✽ TMIN to TMAX V– = 2.7V to 40V, VSENSE = 50mV V– = 2.
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TYPICAL CHARACTERISTICS At TA = +25°C, V+ = 5V, VIN+ = 12V, and RL = 25kΩ, unless otherwise noted. COMMON-MODE REJECTION vs FREQUENCY GAIN vs FREQUENCY 40 120 Common-Mode Rejection (dB) RL = 100kΩ 30 RL = 10kΩ Gain (dB) 20 10 RL = 1kΩ 0 –10 –20 G = 100 100 80 G = 10 60 G=1 40 20 0 100 10k 1k 100k 10M 1M 0.
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TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, V+ = 5V, VIN+ = 12V, and RL = 25kΩ, unless otherwise noted. STEP RESPONSE STEP RESPONSE 1.5V 1V G = 100 G = 50 0.5V 0V 1V 2V G = 100 G = 10 0V 0V 10µs/div 20µs/div OPERATION The transfer function for the INA139 is: Figure 1 shows the basic circuit diagram for both the INA139 and the INA169. Load current, IS, is drawn from the supply, VS, through the shunt resistor, RS.
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The maximum differential input voltage for accurate measurements is 0.5V, which produces a 500µA output current. A differential input voltage of up to 2V will not cause damage. Differential measurements (pins 3 and 4) must be unipolar with a more-positive voltage applied to pin 3. If a morenegative voltage is applied to pin 3, the output current (IO) is zero, but will not cause damage. IS 3 4 INA139 BASIC CONNECTION RL Figure 1 shows the basic connection of the INA139.
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3 4 3 VR INA139 4 REF200 100µA INA139 R1 VO 1 V+ VO 1 R2 RL Gain Set by R1 R2 (V )R Output Offset = R 2 R1 + R 2 Gain Set by RL Output Offset = (100µA)(RL) (independent of V+) a) Using resistor divider. b) Using current source. FIGURE 4. Offsetting the Output Voltage. ±1A Charger 1Ω 3 4 4 3 + 48V +5V 1kΩ 1kΩ 1kΩ +5V 1kΩ 5 Load 5 INA169 2 1 INA169 2 1 1N4148 Comparator 1N4148 SIGN 10kΩ 10kΩ 0V to 1V VO 100kΩ FIGURE 5. Bipolar Current Measurement.
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RS V+ 4 3 4 3 +5V +5V +5V 5 REFOUT BUFIN 5 Digital I/O INA139 BUF INA139 2 1 REF BUFOUT 2 1 RL 25kΩ MUX RL 25kΩ 12-Bit A/D Converter PGIA Clock Divider Oscillator Serial I/O ADS7870 The A/D converter is programmed for differential input. Depending on the polarity of the current, one INA139 provides an output voltage whereas the output of the other is zero. FIGURE 6. Bipolar Current Measurement Using a Differential Input of the A/D Converter.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 8-Jul-2011 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) INA139NA/250 SOT-23 DBV 5 250 178.0 9.0 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.23 3.17 1.37 4.0 8.0 Q3 INA139NA/3K SOT-23 DBV 5 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3 INA169NA/250 SOT-23 DBV 5 250 178.0 9.0 3.23 3.17 1.37 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Jul-2011 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) INA139NA/250 SOT-23 DBV INA139NA/3K SOT-23 DBV 5 250 180.0 180.0 18.0 5 3000 180.0 180.0 18.0 INA169NA/250 SOT-23 DBV INA169NA/3K SOT-23 DBV 5 250 180.0 180.0 18.0 5 3000 180.0 180.0 18.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.