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SBOS401B – JULY 2007 – REVISED FEBRUARY 2010
RECOMMENDED OPERATING CONDITIONS
MIN
V
S
T
A
Supply voltage
Operating free-air temperature
2.7
–40
MAX
18
125
UNIT
V
°C
ELECTRICAL CHARACTERISTICS
V
S
= 5 V, V
CM
= 12 V, V
SENSE
= 100 mV, PRE OUT connected to BUF IN (unless otherwise noted)
PARAMETER
Input
V
SENSE
V
CM
CMRR
V
OS
ΔV
OS
/ΔT
PSR
I
IB
Z
O
Full-scale input voltage
Common-mode input voltage
Common-mode rejection
Offset voltage, RTI
(2)
Input offset voltage
temperature coefficient
Offset voltage power-supply
rejection
Input bias current
Output impedance
(3)
TEST CONDITIONS
T
A
(1)
MIN
TYP
MAX
(V
S
– 0.2)/
Gain
80
UNIT
V
SENSE
= V
IN+
+ V
IN–
25°C
Full range
–16
80
100
0.15
V
V
dB
V
IN+
= –16 V to 80 V
V
IN+
= 12 V to 80 V
25°C
Full range
25°C
Full range
Full range
120
120
±0.5
2.5
±3
2.5
5
±8
96
–50
±0.3
20
100
±16
mV
mV/°C
mV/V
mA
kΩ
nA
nA/°C
V
S
= 2.7 V to 18 V, V
CM
= 18 V
IN– pin
PRE OUT pin
Full range
Full range
25°C
25°C
25°C
Buffer input bias current
Buffer input bias current
temperature coefficient
Output (V
SENSE
≥
20 mV)
(4)
G
G
BUF
Gain
Output buffer gain
Total gain error
Total gain error
temperature coefficient
Total output error
(5)
Nonlinearity error
Z
O
Output impedance
Maximum capacitive load
Voltage Output
(6)
INA270
INA271
25°C
25°C
14
20
2
±0.2
±1
±2
V/V
V/V
%
V
SENSE
= 20 mV to 100 mV
25°C
Full range
Full range
25°C
Full range
50 ppm/°C
±0.75
±1
±0.002
1.5
10
V+ – 0.05
V
GND
+
0.003
V+ – 0.2
V
GND
+
0.05
±2.2
±3
%
%
Ω
nF
V
V
V
SENSE
= 20 mV to 100 mV
OUT pin
No sustained oscillation
R
L
= 10 kΩ to GND
R
L
= 10 kΩ to GND
25°C
25°C
25°C
Full range
Full range
Swing to V+ power-supply rail
Swing to GND
(1)
(2)
(3)
(4)
(5)
(6)
Full range is –40°C to 125°C.
RTI = referred to input
Initial resistor variation is ±30% with an additional –2200-ppm/°C temperature coefficient.
For output behavior when V
SENSE
< 20 mV, see
Total output error includes effects of gain error and V
OS
.
See
curve Output Swing vs Output Current and
in the
section.
Copyright © 2007–2010, Texas Instruments Incorporated
3
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