INA128
INA129
www.ti.com
SBOS051B − OCTOBER 1995 − REVISED FEBRUARY 2005
ELECTRICAL CHARACTERISTICS
At T
A
= +25°C, V
S
=
±15V,
R
L
= 10kΩ, unless otherwise noted.
INA128P, U
INA129P. U
PARAMETER
INPUT
Offset Voltage, RTI
Initial
vs Temperature
vs Power Supply
Long-Term Stability
Impedance, Differential
Common-Mode
Common-Mode Voltage Range
(1)
Safe Input Voltage
Common-Mode Rejection
V
CM
=
±13V, ∆R
S
= 1kΩ
G=1
G = 10
G = 100
G = 1000
BIAS CURRENT
vs Temperature
Offset Current
vs Temperature
NOISE VOLTAGE, RTI
f = 10Hz
f = 100Hz
f = 1kHz
f
B
= 0.1Hz to 10Hz
Noise Current
f = 10Hz
f = 1kHz
f
B
= 0.1Hz to 10Hz
GAIN
Gain Equation, INA128
Gain Equation,
INA129
Range of Gain
Gain Error
G=1
G = 10
G = 100
G = 1000
Gain vs Temperature
(2)
50kΩ (or 49.4kΩ) Resistance
(2)(3)
Nonlinearity
V
O
=
±13.6V,
G = 1
G = 10
G = 100
G = 1000
G=1
1
±0.01
±0.02
±0.05
±0.5
±1
±25
±0.0001
±0.0003
±0.0005
±0.001
1 + (50kΩ/R
G
)
1 + (49.4kΩ/R
G
)
10000
±0.024
±0.4
±0.5
±1
±10
±100
±0.001
±0.002
±0.002
(4)
INA128PA, UA
INA129PA, UA
MAX
MIN
TYP
MAX
UNIT
CONDITIONS
MIN
TYP
T
A
= +25°C
T
A
= TMIN to TMAX
V
S
=
±2.25V
to
±18V
±10±100/G
±0.2±2/G
±0.2±20/G
±0.1±3/G
10
10
|| 2
10
11
|| 9
±50±500/G
±0.5±20/G
±1±100/G
±25±100/G
±0.2±5/G
∗
∗
∗
∗
∗
∗
∗
∗
±125±1000/G
±1±20/G
±2±200/G
µV
µV/°C
µV/V
µV/mo
Ω
|| pF
Ω
|| pF
V
V
V
O
= 0V
(V+) − 2
(V−) + 2
(V+) − 1.4
(V−) + 1.7
±40
∗
73
93
110
110
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
±0.1
±0.5
±0.7
±2
∗
∗
±0.002
±0.004
±0.004
∗
±10
±10
V
dB
dB
dB
dB
nA
pA/°C
nA
pA/°C
nV/√Hz
nV/√Hz
nV/√Hz
µV
PP
pA/√Hz
pA/√Hz
pAPP
V/V
V/V
V/V
%
%
%
%
ppm/°C
ppm/°C
% of FSR
% of FSR
% of FSR
% of FSR
80
100
120
120
86
106
125
130
±2
±30
±1
±30
±5
±5
G = 1000, R
S
= 0Ω
10
8
8
0.2
0.9
0.3
30
NOTE:
∗
Specification is same as INA128P, U or INA129P, U.
(1) Input common-mode range varies with output voltage — see typical curves.
(2) Specified by wafer test.
(3) Temperature coefficient of the 50kΩ (or 49.4kΩ) term in the gain equation.
(4) Nonlinearity measurements in G = 1000 are dominated by noise. Typical nonlinearity is
±0.001%.
3
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