Datasheet

INA326, INA327
3
SBOS222D
www.ti.com
ELECTRICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V
BOLDFACE limits apply over the specified temperature range, T
A
= –40°C to +85°C
At T
A
= +25°C, R
L
= 10kΩ, G = 100 (R
1
= 2kΩ, R
2
= 100kΩ), external gain set resistors, and IA
COMMON
= V
S
/2, with external equivalent filter corner of 1kHz, unless
otherwise noted.
INA326EA, INA327EA
PARAMETER CONDITION MIN TYP MAX UNITS
INPUT
Offset Voltage, RTI V
OS
V
S
= +5V, V
CM
= V
S
/2 ±20 ±100 µV
Over Temperature
±124 µV
vs Temperature dV
OS
/dT ±0.1 ±0.4 µV/°C
vs Power Supply PSR V
S
= +2.7V to +5.5V, V
CM
= V
S
/2 ±20 ±3 µV/V
Long-Term Stability See Note (1)
Input Impedance, Differential 10
10
|| 2 Ω || pF
Common-Mode 10
10
|| 14 Ω || pF
Input Voltage Range (V–) – 0.02 (V+) + 0.1 V
Safe Input Voltage (V–) – 0.5 (V+) + 0.5 V
Common-Mode Rejection CMR V
S
= +5V, V
CM
= (V–) – 0.02V to (V+) + 0.1V 100 114 dB
Over Temperature 94 dB
INPUT BIAS CURRENT V
CM
= V
S
/2
Bias Current I
B
V
S
= +5V ±0.2 ±2nA
vs Temperature See Typical Characteristics
Offset Current I
OS
V
S
= +5V ±0.2 ±2nA
NOISE
Voltage Noise, RTI R
S
= 0Ω, G = 100, R
1
= 2kΩ, R
2
= 100kΩ
f = 10Hz 33 nV/
√Hz
f = 100Hz 33 nV/
√Hz
f = 1kHz 33 nV/
√Hz
f = 0.01Hz to 10Hz 0.8 µVp-p
Voltage Noise, RTI R
S
= 0Ω, G = 10, R
1
= 20kΩ, R
2
= 100kΩ
f = 10Hz 120 nV/
√Hz
f = 100Hz 97 nV/
√Hz
f = 1kHz 97 nV/
√Hz
f = 0.01Hz to 10Hz 4 µVp-p
Current Noise, RTI
f = 1kHz 0.15 pA/
√Hz
f = 0.01Hz to 10Hz 4.2 pAp-p
Output Ripple, V
O
Filtered
(2)
See Applications Information
GAIN
Gain Equation G = 2(R
2
/R
1
)
Range of Gain < 0.1 > 10000 V/V
Gain Error
(3)
G = 10, 100, V
S
= +5V, V
O
= 0.075V to 4.925V ±0.08 ±0.2 %
vs Temperature G = 10, 100, V
S
= +5V, V
O
= 0.075V to 4.925V ±6 ±25 ppm/°C
Nonlinearity G = 10, 100, V
S
= +5V, V
O
= 0.075V to 4.925V ±0.004 ±0.01 % of FS
OUTPUT
Voltage Output Swing from Rail R
L
= 100kΩ 5mV
R
L
= 10kΩ, V
S
= +5V 75 10 mV
Over Temperature 75 mV
Capacitive Load Drive 500 pF
Short-Circuit Current I
SC
±25 mA
INTERNAL OSCILLATOR
Frequency of Auto-Correction 90 kHz
Accuracy ±20 %
FREQUENCY RESPONSE
Bandwidth
(4)
, –3dB BW G = 1 to 1k 1 kHz
Slew Rate
(4)
SR V
S
= +5V, All Gains, C
L
= 100pF Filter Limited
Settling Time
(4)
, 0.1% t
S
1kHz Filter, G = 1 to 1k, V
O
= 2V step, C
L
= 100pF 0.95 ms
0.01% 1.3 ms
0.1%
10kHz Filter, G = 1 to 1k, V
O
= 2V step, C
L
= 100pF 130 µs
0.01% 160 µs
Overload Recovery
(4)
1kHz Filter, 50% Output Overload, G = 1 to 1k 30 µs
10kHz Filter, 50% Output Overload, G = 1 to 1k 5 µs