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| OPA191 Datasheet, PDF (9/45 Pages) Texas Instruments – Low Offset Voltage, Low Input Bias Current Op Amp | |||
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www.ti.com
OPA191, OPA2191, OPA4191
SBOS701 â DECEMEBER 2015
6.8 Electrical Characteristics: VS = ±2.25 V to ±4 V (VS = 4.5 V to 8 V)
at TA = +25°C, VCM = VOUT = VS / 2, and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
OFFSET VOLTAGE
VOS
Input offset voltage
VS = ±2.25V,
VCM = (V+) â 3 V
(V+) â 3.0 V < VCM < (V+) â 1.5 V
TA = 0°C to 85°C
TA = â40°C to +125°C
±5
±25
±8
±75
±10
±125
See Common-Mode Voltage Range
section
µV
dVOS/dT Input offset voltage drift
VS = ±3V,
VCM = (V+) â 1.5 V
VS = ±2.25V,
VCM = (V+) â 3 V,
D package only
VS = ±2.25V,
VCM = (V+) â 1.5 V,
D package only
TA = 0°C to 85°C
TA = â40°C to +125°C
TA = 0°C to 85°C
TA = â40°C to +125°C
TA = â40°C to +125°C
±10
±25
±50
±0.1
±0.15
±0.5
±50
±150
±250
±0.8
±1.2
µV/°C
PSRR
Power-supply rejection
ratio
TA = â40°C to +125°C, VCM = VS / 2 â 0.75 V
±1
µV/V
INPUT BIAS CURRENT
IB
Input bias current
IOS
NOISE
Input offset current
TA = â40°C to +125°C
TA = â40°C to +125°C
±5
±20 pA
±9 nA
±2
±20 pA
±2 nA
En
Input voltage noise
(Vâ) â 0.1 V < VCM < (V+) â 3 V f = 0.1 Hz to 10 Hz
(V+) â 1.5 V < VCM < (V+) + 0.1 V f = 0.1 Hz to 10 Hz
f = 100 Hz
(Vâ) â 0.1 V < VCM < (V+) â 3 V
f = 1 kHz
en
Input voltage noise density
f = 100 Hz
(V+) â 1.5 V < VCM < (V+) + 0.1 V f = 1 kHz
1.4
7
µVPP
18
15
nV/âHz
53
24
in
Input current noise density
INPUT VOLTAGE
f = 1 kHz
1.5
fA/âHz
VCM
Common-mode voltage
range
(Vâ) â 0.1
(V+) + 0.1
V
CMRR
Common-mode rejection
ratio
INPUT IMPEDANCE
VS = ±2.25 V,
(Vâ) â 0.1 V < VCM < (V+) â 3 V
VS = ±2.25 V,
(Vâ) < VCM < (V+) â 3 V
VS = ±2.25 V,
(V+) â 1.5 V < VCM < (V+)
(V+) â 3 V < VCM < (V+) â 1.5 V
TA = â40°C to +125°C
TA = â40°C to +125°C
96
110
90
104
dB
96
120
84
100
See Typical Characteristics
ZID
Differential
ZIC
Common-mode
100 || 1.6
1 || 6.4
MΩ || pF
1013Ω ||
pF
OPEN-LOOP GAIN
VS = ±2.25V,
110
120
AOL
Open-loop voltage gain
(Vâ) + 0.6 V < VO < (V+) â 0.6 V,
RL = 2 kΩ
VS = ±2.25V,
TA = â40°C to +125°C
100
114
110
126
dB
(Vâ) + 0.3 V < VO < (V+) â 0.3 V,
RL = 10 kΩ
TA = â40°C to +125°C
106
120
Copyright © 2015, Texas Instruments Incorporated
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Product Folder Links: OPA191 OPA2191 OPA4191
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