Burr Brown INA138NA-3K, INA138NA-250 Datasheet
®
INA138
INA168
©1999 Burr-Brown Corporation PDS-1576A Printed in U.S.A. December, 1999
FEATURES
● COMPLETE UNIPOLAR HIGH-SIDE
CURRENT MEASUREMENT CIRCUIT
● WIDE SUPPLY AND COMMON-MODE
RANGE
● INA138: 2.7V to 36V
● INA168: 2.7V to 60V
● INDEPENDENT SUPPLY AND INPUT
COMMON-MODE VOLTAGES
● SINGLE RESISTOR GAIN SET
● LOW QUIESCENT CURRENT (25µA typ)
● SOT23-5 Package
High-Side Measurement
CURRENT SHUNT MONITOR
DESCRIPTION
The INA138 and INA168 are high-side, unipolar,
current shunt monitors. Wide input common-mode
voltage range, low quiescent current, and tiny SOT-23
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. Both
models draw only 25µA quiescent current, which also
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 +85°C
industrial temperature range.
APPLICATIONS
● CURRENT SHUNT MEASUREMENT
Automotive, Telephone, Computers
● PORTABLE & BATTERY BACKUP
SYSTEMS
● BATTERY CHARGERS
● POWER MANAGEMENT
● CELL PHONES
● PRECISION CURRENT SOURCE
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
For most current data sheet and other product
information, visit www.burr-brown.com
R
S
2
1
OUT
GND
R
L
VO = ISRSRL/5kΩ
Load
5kΩ
5kΩ
V
IN+
V
IN+
V
IN–
3
4
I
S
V+
5
2
®
INA138, INA168
SPECIFICATIONS
At TA = –40°C to +85°C, VS = 5V, V
IN+
= 12V, R
OUT
= 125kΩ, unless otherwise noted.
PARAMETER CONDITION MIN TYP MAX MIN TYP MAX UNITS
INPUT
Full-Scale Sense Voltage V
SENSE
= V
IN+
– V
IN
–
100 500 ✽✽mV
Common-Mode Input Range 2.7 36 ✽ 60 V
Common-Mode Rejection
V
IN+
= 2.7V to 40V, V
SENSE
= 50mV
100 120 dB
V
IN+
= 2.7V to 60V, V
SENSE
= 50mV
100 120 dB
Offset Voltage
(1)
±0.2 ±1 ✽✽mV
vs Temperature T
MIN
to T
MAX
1 ✽ µV/°C
vs Power Supply
V– = 2.7V to 40V, V
SENSE
= 50mV
0.1 10 µV/V
V– = 2.7V to 60V, V
SENSE
= 50mV
0.1 10 µV/V
Input Bias Current V
IN
+
, V
IN
–
2 ✽ uA
OUTPUT
Transconductance V
SENSE
= 10mV – 150mV 198 200 202 ✽✽✽µA/V
vs Temperature V
SENSE
= 100mV 10 ✽ nA/°C
Nonlinearity Error V
SENSE
= 10mV to 150mV ±0.01 ±0.1 ✽✽%
Total Output Error V
SENSE
= 100mV ±0.5 ±2 ✽✽%
Output Impedance 1 || 5 ✽ GΩ || pF
Voltage Output
Swing to Power Supply, V+
(V+) – 0.8 (V+) – 1.0
✽✽ V
Swing to Common Mode, V
CM
VCM – 0.5 VCM – 0.8
✽✽ V
FREQUENCY RESPONSE
Bandwidth R
OUT
= 5kΩ 800 ✽ kHz
R
OUT
= 125kΩ 32 ✽ kHz
Settling Time (0.1%) 5V Step, R
OUT
= 5kΩ 1.8 ✽ µs
5V Step, R
OUT
= 125kΩ 30 ✽ µs
NOISE
Output-Current Noise Density 9 ✽ pA/√Hz
Total Output-Current Noise BW = 100kHz 3 ✽ nA RMS
POWER SUPPLY
Operating Range, V+ 2.7 36 ✽ 60 V
Quiescent Current V
SENSE
= 0, IO = 0 25 45 ✽✽µA
TEMPERATURE RANGE
Specification, T
MIN
to T
MAX
–40 85 ✽✽°C
Operating –55 125 ✽✽°C
Storage –65 150 ✽✽°C
Thermal Resistance
θ
JA
200 ✽ °C/W
NOTES: (1) Defined as the amount of input voltage, V
SENSE
, to drive the output to zero.
INA138 INA168
3
®
INA138, INA168
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
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.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
Supply Voltage, V+
INA138 ...............................................................................–0.3V to 60V
INA168 ...............................................................................–0.3V to 60V
Analog Inputs, V
IN
+
, V
IN
–
INA138
Common Mode ............................................................... –0.3V to 40V
Differential (V
IN
+
) – (V
IN
–
) ..................................................... –40V to 2V
INA168
Common Mode ............................................................... –0.3V to 60V
Differential (V
IN
+
) – (V
IN
–
) ..................................................... –40V to 2V
Analog Output, Out .............................................................. –0.3V to 40V
Operating Temperature .................................................. –55°C to +125°C
Storage Temperature ..................................................... –55°C to +125°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.
ABSOLUTE MAXIMUM RATINGS
(1)
PACKAGE SPECIFIED
DRAWING TEMPERATURE PACKAGE ORDERING TRANSPORT
PRODUCT PACKAGE NUMBER RANGE MARKING NUMBER
(1)
MEDIA
INA138NA SOT-23-5 Surface Mount 331 –40°C to +85°C INA138NA/250 Tape and Reel
"""""INA138NA/3K Tape and Reel
INA168NA
(2)
SOT-23-5 Surface Mount 331 –40°C to +85°C INA168NA/250 Tape and Reel
"""""INA168NA/3K Tape and Reel
NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /3K indicates 3000 devices per reel). Ordering 3000 pieces
of “INA138NA/3K” will get a single 3000-piece Tape and Reel. (2) INA168 available Q2'00.
PACKAGE/ORDERING INFORMATION
PIN CONFIGURATION
TOP VIEW SOT
OUT
GND
V
IN
V+
V
IN
1
2
3
5
4
+–
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