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INA271 Datasheet PDF - Burr-Brown

Part Number INA271
Description Unidirectional Measurement Current-Shunt Monitor
Manufacturers Burr-Brown 
Logo Burr-Brown Logo 



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INA271 datasheet, circuit
INA270
INA271
SBOS381 − FEBRUARY 2007
Voltage Output, Unidirectional Measurement
Current-Shunt Monitor
FEATURES
DESCRIPTION
D WIDE COMMON-MODE RANGE: −16V to +80V
D CMRR: 120dB
D ACCURACY:
The INA270 and INA271 family of current-shunt monitors
with voltage output can sense voltage drops across
current shunts at common-mode voltages from −16V to
+80V, independent of the supply voltage. The INA270 and
±2.5mV offset (max)
INA271 pinouts readily enable filtering.
±1% gain error (max)
− 20µV/°C offset drift (max)
− 55ppm/°C gain drift (max)
The INA270 and INA271 are available with two output
voltage scales: 14V/V and 20V/V. The 130kHz bandwidth
simplifies use in current-control loops.
D BANDWIDTH: Up to 130kHz
The INA270 and INA271 operate from a single +2.7V to
D TWO TRANSFER FUNCTIONS AVAILABLE:
− 14V/V (INA270)
− 20V/V (INA271)
D QUIESCENT CURRENT: 900µA (max)
+18V supply, drawing a maximum of 900µA of supply
current. They are specified over the extended operating
temperature range of −40°C to +125°C and are offered in
an SO-8 package.
D POWER SUPPLY: +2.7V to +18V
D PROVISION FOR FILTERING
APPLICATIONS
D POWER MANAGEMENT
16V to +80V
Supply
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RS
Load
Single−Pole Filter
Capacitor
D AUTOMOTIVE
+2.7V to +18V
D TELECOM EQUIPMENT
D NOTEBOOK COMPUTERS
D BATTERY CHARGERS
IN+
5k
IN
5k
PRE OUT
BUF IN
V+
D CELL PHONES
D WELDING EQUIPMENT
A1
OUT
DEVICE COMPARISON
DEVICE
INA270
INA271
GAIN
14V/V
20V/V
96k
A2
INA270
RL
GND
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.
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 2007, Texas Instruments Incorporated
www.ti.com

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INA271 equivalent
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TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = +12V, VCM = 12V, and VSENSE = 100mV, unless otherwise noted.
INA270
INA271
SBOS381 − FEBRUARY 2007
POSITIVE OUTPUT VOLTAGE SWING
vs OUTPUT CURRENT
12
11
10
VS = 12V
Sourcing Current
9
8
7
+25_C
+125_ C
40_C
6
5
VS = 3V
Sourcing Current
4 +25_C 40_C Output stage is designed
3 to source current. Current
2 sinking capability is
1 +125_ C
0
approximately 400µA.
0 5 10 15 20 25 30
Output Current (mA)
1000
900
800
700
600
500
400
300
200
100
0
0
QUIESCENT CURRENT vs OUTPUT VOLTAGE
1 2 3 4 5 6 7 8 9 10
Output Voltage (V)
QUIESCENT CURRENT
vs COMMON−MODE VOLTAGE
875
VSENSE = 100mV:
775
VS = 12V
VS = 2.7V
675
575
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475
375
VSENSE = 0mV:
275
VS = 12V
VS = 2.7V
175
16 12 8 4 0 4 8 12 16 20 ... 76 80
VCM (V)
OUTPUT SHORT−CIRCUIT CURRENT
vs SUPPLY VOLTAGE
34 40_C
30
+25_ C
26 +125_ C
22
18
14
10
6
2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 17
Supply Voltage (V)
18
PREOUT OUTPUT RESISTANCE
PRODUCTION DISTRIBUTION
BUFFER GAIN vs FREQUENCY
200
150
Phase
100
50
Gain
0
RPREOUT (k)
50
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
5

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Information Total 13 Pages
Download[ INA271.PDF Datasheet ]

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