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Part: INA168NA/3K
Category:
Analog & Mixed-Signal Processing
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-> Instrumentation Amplifiers
-> Difference Amplifiers
Description: ti INA168, High-side Measurement Current Shunt Monitor
Company: Texas Instruments, Inc.
Datasheet: Download INA168NA/3K datasheet File size : 253 kB
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Datasheet text preview:
INA138 INA168
SBOS122A DECEMBER 1999 REVISED DECEMBER 2002
High-Side Measurement CURRENT SHUNT MONITOR
FEATURES
q COMPLETE UNIPOLAR HIGH-SIDE CURRENT MEASUREMENT CIRCUIT q WIDE SUPPLY AND COMMON-MODE RANGE q INA138: 2.7V to 36V q INA168: 2.7V to 60V q INDEPENDENT SUPPLY AND INPUT COMMONMODE VOLTAGES q SINGLE RESISTOR GAIN SET q LOW QUIESCENT CURRENT (25µA typ) q WIDE TEMPERATURE RANGE: 40°C to +125°C q SOT23-5 PACKAGE
DESCRIPTION
The INA138 and INA168 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, low quiescent current, and tiny SOT23 packaging enable use in a variety of applications. Input common-mode and power-supply voltages are independent and can range from 2.7V to 36V for the INA138 and 2.7V to 60V for the INA168. Quiescent current is only 25µA, 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 circuit invites creative applications in measurement and level shifting. Both the INA138 and INA168 are available in SOT23-5 and are specified for the 40°C to +125°C temperature range.
APPLICATIONS
q CURRENT SHUNT MEASUREMENT: Automotive, Telephone, Computers q PORTABLE AND BATTERY-BACKUP SYSTEMS q BATTERY CHARGERS q POWER MANAGEMENT q CELL PHONES q PRECISION CURRENT SOURCE
RS VIN+ Up To 60V 3 VIN+ 5k 4 VIN 5k
IS
Load
V+ 5
OUT GND 2 1 RL
VO = ISRSRL/5k
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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 1999, 2002 Texas Instruments Incorporated
www.ti.com
PACKAGE /ORDERING INFORMATION
PACKAGE DESIGNATOR(1) DBV SPECIFIED TEMPERATURE RANGE 40°C to +125°C PACKAGE MARKING B38 ORDERING NUMBER INA138NA/250 INA138NA/3K INA168NA/250 INA168NA/3K TRANSPORT MEDIA, QUANTITY Tape and Reel, 250 Tape and Reel, 3000 Tape and Reel, 250 Tape and Reel, 3000
PRODUCT INA138
PACKAGE-LEAD SOT23-5 Surface-Mount
"
INA168
"
SOT23-5 Surface-Mount
"
DBV
"
40°C to +125°C
"
A68
"
"
"
"
"
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage, V+ INA138 ....... 0.3V to 60V INA168 ....... 0.3V to 75V Analog Inputs, VIN+, VIN INA138 Common Mode ...... 0.3V to 60V Differential (VIN+) (VIN) ........ 40V to 2V INA168 Common Mode ...... 0.3V to 75V Differential (VIN+) (VIN) ........ 40V to 2V Analog Output, Out ..... 0.3V to 40V Operating Temperature ........ 55°C to +150°C Storage Temperature ..... 55°C to +150°C Junction Temperature ........... +150°C Lead Temperature (soldering, 10s) ..... +300°C NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied.
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PIN CONFIGURATION
Top View SOT23
OUT GND VIN+
1 2 3
5
V+
4
VIN
2
INA138, INA168
www.ti.com
SBOS122A
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, TA = 40°C to +125°C.
All other characteristics at TA = +25°C, VS = 5V, VIN+ = 12V, and ROUT = 125k, unless otherwise noted. INA138NA PARAMETER INPUT Full-Scale Sense Voltage Common-Mode Input Range Common-Mode Rejection Offset Voltage(1) Over Temperature vs Temperature vs Power Supply, V+ Input Bias Current vs Temperature OUTPUT Transconductance Over Temperature vs Temperature Nonlinearity Error Total Output Error Over Temperature Output Impedance Voltage Output Swing to Power Supply, V+ Swing to Common Mode, VCM FREQUENCY RESPONSE Bandwidth Settling Time (0.1%) CONDITION VSENSE = VIN+ VIN VIN+ = 2.7V to 40V, VSENSE = 50mV VIN+ = 2.7V to 60V, VSENSE = 50mV 2.7 100 MIN TYP 100 120 100 ±0.2 1 0.1 2 10 ±1 ±2 10 0.1 10 120 MAX 500 36 MIN INA168NA TYP MAX 60 UNITS mV V dB dB mV mV µV/°C µV/V µV/V µA µA µA/V
V = 2.7V to 40V, VSENSE = 50mV V = 2.7V to 60V, VSENSE = 50mV VIN+ VIN
TA = +25°C, VSENSE = 10mV 150mV VSENSE = 100mV VSENSE = 10mV to 150mV VSENSE = 100mV
198 196
200 10 ±0.01 ±0.5 ±2.5 1 || 5
202 204 ±0.1 ±2
µA/V nA/°C
% % % G || pF V V
(V+) 0.8 (V+) 1.0 VCM 0.5 VCM 0.8 ROUT = 5k ROUT = 125k 5V Step, ROUT = 5k 5V Step, ROUT = 125k 800 32 1.8 30
kHz kHz µs µs pA/Hz nA RMS
NOISE Output-Current Noise Density Total Output-Current Noise POWER SUPPLY Operating Range, V+ Quiescent Current Over Temperature TEMPERATURE RANGE Specification, TMIN to TMAX Operating Storage Thermal Resistance specification same as INA138NA
BW = 100kHz
9 3
2.7 TA = +25°C, VSENSE = 0, IO = 0 25
36 45 60
60
V µA µA °C °C °C °C/W
40 55 65
125 150 150 200
JA
NOTE: (1) Defined as the amount of input voltage, VSENSE, to drive the output to zero.
INA138, INA168
SBOS122A
www.ti.com
3
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