INA270.pdf 데이터시트 (총 13 페이지) - 파일 다운로드 INA270 데이타시트 다운로드

No Preview Available !

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
www.DataSheet4U.com
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

No Preview Available !

INA270
INA271
SBOS381 − FEBRUARY 2007
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage (VS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18V
Analog Inputs, VIN+, VIN−
Differential, (VIN+) − (VIN−) . . . . . . . . . . . . . . . . . −18V to +18V
Common-Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . −16V to +80V
Analog Output
OUT and PRE OUT Pins . . . . . . . . GND − 0.3V to (V+) + 0.3V
Input Current Into Any Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Operating Temperature . . . . . . . . . . . . . . . . . . . . . −55°C to +150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
ESD Ratings:
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3000V
Charged-Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750V
(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 supported.
www.ti.com
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.
ORDERING INFORMATION(1)
PRODUCT
PACKAGE-LEAD
PACKAGE DESIGNATOR
GAIN
PACKAGE MARKING
INA270
SO-8
D
14 I270A
INA271
SO-8
D
20 I271A
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site
at www.ti.com.
PIN CONFIGURATION
www.DataSheet4U.com
Top View
SO
IN1
GND 2
PRE OUT 3
BUF IN 4
INA27x
8 IN+
7 NC(1)
6 V+
5 OUT
NOTE (1): NC denotes no internal connection.
2

No Preview Available !

www.ti.com
INA270
INA271
SBOS381 − FEBRUARY 2007
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range: TA = −40°C to +125°C.
At TA = +25°C, VS = +5V, VCM = +12V, VSENSE = 100mV, and PRE OUT connected to BUF IN, unless otherwise noted.
INA270, INA271
PARAMETER
CONDITIONS
MIN TYP
MAX
UNITS
INPUT
Full-Scale Input Voltage
Common-Mode Input Range
Common-Mode Rejection
Over Temperature
Offset Voltage, RTI(1)
Over Temperature
VSENSE
VCM
CMRR
VOS
VSENSE = (VIN+) + (VIN−)
VIN+ = −16V to +80V
VIN+ = +12V to +80V
0.15
(VS − 0.2)/Gain
V
−16 +80 V
80 120
dB
100 120
dB
±0.5
2.5 mV
±3 mV
vs Temperature
vs Power-Supply
Input Bias Current, VIN− Pin
PRE OUT Output Impedance(3)
dVOS/dT
PSR
IB
VS = +2.7V to +18V, VCM = +18V
2.5 20 µV/°C
5 100 µV/V
±8 ±16 µA
96 k
Buffer Input Bias Current
−50 nA
Buffer Input Bias Current Temperature Coefficient
±0.03
nA/°C
OUTPUT (VSENSE . 20mV)(2)
Gain: INA270 Total Gain
G
14 V/V
INA271 Total Gain
G
20 V/V
Output Buffer Gain
Total Gain Error
Over Temperature
GBUF
VSENSE = 20mV to 100mV
2
±0.2
V/V
±1 %
±2 %
vs Temperature
50 ppm/°C
Total Output Error(4)
Total Output Error
VSENSE = 20mV to 100mV
±0.75
±1.0
±2.2 %
±3.0 %
Nonlinearity Error
Output Impedance, Pin 5
Maximum Capacitive Load
VSENSE = 20mV to 100mV
RO
No Sustained Oscillation
±0.002
1.5
10
%
nF
VOLTAGE OUTPUT(5)
Swing to V+ Power-Supply Rail
Swing to GND(6)
FREQUENCY RESPONSE
Bandwidth
Phase Margin
Slew Rate
Settling Time (1%)
NOISE, RTI(1)
Voltage Noise Density
POWER SUPPLY
Operating Range
Quiescent Current
Over Temperature
TEMPERATURE RANGE
Specified Temperature Range
Operating Temperature Range
Thermal Resistance
SO-8
RL w=w1w0.DkataSthoeeGt4UN.cDom
BW CLOAD = 5pF
CLOAD < 10nF
SR
tS VSENSE = 10mV to 100mVPP, CLOAD = 5pF
en
VS
IQ VOUT = 2V
VSENSE = 0mV
qJA
+2.7
−40
−55
(V+) − 0.05
VGND + 0.003
(V+) − 0.2
VGND + 0.05
V
V
130 kHz
40 degrees
1 V/µs
2 µs
40 nV/Hz
+18 V
700 900 µA
350 950 µA
+125
+150
°C
°C
150 °C/W
(1) RTI means Referred-to-Input.
(2) For output behavior when VSENSE < 20mV, see the section, Accuracy Variations as a Result of VSENSE and Common-Mode Voltage in the Applications
Information.
(3) Initial resistor variation is ±30% with an additional −2200ppm/°C temperature coefficient.
(4) Total output error includes effects of gain error and VOS.
(5) See typical characteristic curve Output Swing vs Output Current, and Applications Information section Accuracy Variations as a Result of VSENSE and
Common-Mode Voltage.
(6) Ensured by design; not production tested.
3

No Preview Available !

INA270
INA271
SBOS381 − FEBRUARY 2007
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = +12V, VCM = 12V, and VSENSE = 100mV, unless otherwise noted.
www.ti.com
45
40
35
30
G = 20
25
G = 14
20
15
10
5
10k
GAIN vs FREQUENCY
CLOAD = 1000pF
100k
Frequency (Hz)
1M
45
40
35
30
G = 20
25 G = 14
20
15
10
5
10k
GAIN vs FREQUENCY
CLOAD = 0pF
100k
Frequency (Hz)
1M
20
VS = 18V
18
16
14
12
10
8
6
4
2
0
GAIN PLOT
20V/V
14V/V
VDIFFERENTIAL (mV)
COMMON−MODE AND POWER−SUPPLY REJECTION
vs FREQUENCY
140
130
120 CMRR
110
www.DataSheet4U.co1m00
90
PSR
80
70
60
50
40
10 100 1k 10k 100k
Frequency (Hz)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
TOTAL OUTPUT ERROR vs VSENSE
50 100 150 200 250 300 350 400 450 500
VSENSE (mV)
OUTPUT ERROR vs COMMON−MODE VOLTAGE
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
16 12 8 4 0 4 8 12 16 20 ... 76 80
Common−Mode Voltage (V)
4

No Preview Available !

www.ti.com
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
www.DataSheet4U.com
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