Datasheet

2
®
INA115
SPECIFICATIONS
ELECTRICAL
At T
A
= +25°C, V
S
= ±15V, R
L
= 2kΩ unless otherwise noted.
✻ Specification same as INA115BU.
NOTE: (1) Temperature coefficient of the “50kΩ” term in the gain equation. (2) Output specifications are for output amplifier, A
3
. A
1
and A
2
provide the same output
voltage swing but have less output current drive. A
1
and A
2
can drive external loads of 25kΩ || 200pF.
INA115BU INA115AU
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
INPUT
Offset Voltage, RTI
Initial T
A
= +25°C ±10 + 20/G ±50 + 100/G ±25 + 30/G ±125 + 500/G µV
vs Temperature T
A
= T
MIN
to T
MAX
±0.1 + 0.5/G ±0.25 + 5/G ±0.25 + 5/G ±1 + 10/G µV/°C
vs Power Supply V
S
= ±2.25V to ±18V 0.5 + 2/G 3 + 10/G ✻✻µV/V
Long-Term Stability ±0.2 + 0.5/G ✻ µV/mo
Impedance, Differential 10
10
|| 6 ✻ Ω || pF
Common-Mode 10
10
|| 6 ✻ Ω || pF
Input Common-Mode Range ±11 ±13.5 ✻✻ V
Safe Input Voltage ±40 ✻ V
Common-Mode Rejection V
CM
= ±10V, ∆R
S
= 1kΩ
G = 1 80 96 75 90 dB
G = 10 96 115 90 106 dB
G = 100 110 120 106 110 dB
G = 1000 115 120 106 110 dB
BIAS CURRENT ±0.5 ±2 ✻ ±5nA
vs Temperature ±8 ✻ pA/°C
OFFSET CURRENT ±0.5 ±2 ✻ ±5nA
vs Temperature ±8 ✻ pA/°C
NOISE VOLTAGE, RTI G = 1000, R
S
= 0Ω
f = 10Hz 15 ✻ nV/√Hz
f = 100Hz 11 ✻ nV/√Hz
f = 1kHz 11 ✻ nV/√Hz
f
B
= 0.1Hz to 10Hz 0.4 ✻ µVp-p
Noise Current
f=10Hz 0.4 ✻ pA/√Hz
f=1kHz 0.2 ✻ pA/√Hz
f
B
= 0.1Hz to 10Hz 18 ✻ pAp-p
GAIN
Gain Equation 1 + (50kΩ/R
G
) ✻ V/V
Range of Gain 1 10000 ✻✻V/V
Gain Error G = 1 ±0.01 ±0.05 ✻✻%
G = 10 ±0.02 ±0.4 ✻ ±0.5 %
G = 100 ±0.05 ±0.5 ✻ ±0.7 %
G = 1000 ±0.5 ±1 ✻ ±2%
Gain vs Temperature G = 1 ±2 ±10 ✻ ±10 ppm/°C
50kΩ Resistance
(1)
±25 ±100 ✻✻ppm/°C
Nonlinearity G = 1 ±0.0001 ±0.001 ✻ ±0.002 % of FSR
G = 10 ±0.0005 ±0.002 ✻ ±0.004 % of FSR
G = 100 ±0.0005 ±0.002 ✻ ±0.004 % of FSR
G = 1000 ±0.002 ±0.01 ✻ ±0.02 % of FSR
OUTPUT
(2)
Voltage I
O
= 5mA, T
MIN
to T
MAX
±13.5 ±13.7 ✻✻ V
V
S
= ±11.4V, R
L
= 2kΩ±10 ±10.5 ✻✻ V
V
S
= ±2.25V, R
L
= 2kΩ±1 ±1.5 ✻✻ V
Load Capacitance Stability 1000 ✻ pF
Short Circuit Current +20/–15 ✻ mA
FREQUENCY RESPONSE
Bandwidth, –3dB G = 1 1 ✻ MHz
G = 10 100 ✻ kHz
G = 100 10 ✻ kHz
G = 1000 1 ✻ kHz
Slew Rate V
O
= ±10V, G = 10 0.3 0.6 ✻✻ V/µs
Settling Time, 0.01% G = 1 18 ✻ µs
G = 10 20 ✻ µs
G = 100 120 ✻ µs
G = 1000 1100 ✻ µs
Overload Recovery 50% Overdrive 20 ✻ µs
POWER SUPPLY
Voltage Range ±2.25 ±15 ±18 ✻✻ ✻ V
Current V
IN
= 0V ±2.2 ±3 ✻✻mA
TEMPERATURE RANGE
Specification –40 +85 ✻✻°C
Operating –40 +125 ✻✻°C
θ
JA
80 ✻ °C/W