Datasheet

OPA188
www.ti.com SBOS642A –MARCH 2013–REVISED MARCH 2013
ELECTRICAL CHARACTERISTICS:
Low-Voltage Operation, V
S
= ±2 V to < ±4 V (V
S
= +4 V to < +8 V)
At T
A
= +25°C, R
L
= 10 kΩ connected to V
S
/ 2
(1)
, and V
CM
= V
OUT
= V
S
/ 2
(1)
, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
±6 ±25 μV
V
OS
Input offset voltage
T
A
= –40°C to +125°C ±0.03 ±0.085 μV/°C
V
S
= 4 V to 36 V,
PSRR Power-supply rejection ratio 0.075 0.3 μV/V
T
A
= –40°C to +125°C
Long-term stability
(2)
4 μV
INPUT BIAS CURRENT
±160 ±1400 pA
I
B
Input bias current
T
A
= –40°C to +125°C ±8 nA
±320 ±2800 pA
I
OS
Input offset current
T
A
= –40°C to +125°C ±4 nA
NOISE
f = 0.1 Hz to 10 Hz 250 nV
PP
e
n
Input voltage noise
f = 0.1 Hz to 10 Hz 40 nVrms
Input voltage noise density f = 1 kHz 8.8 nV/√Hz
i
n
Input current noise density f = 1 kHz 7 fA/√Hz
INPUT VOLTAGE RANGE
V
CM
Common-mode voltage range T
A
= –40°C to +125°C V– (V+) – 1.5 V
(V–) < V
CM
< (V+) – 1.5 V 106 114 dB
(V–) + 0.5 V < V
CM
< (V+) – 1.5 V,
114 120 dB
CMRR Common-mode rejection ratio V
S
= ±2 V
(V–) + 0.5 V < V
CM
< (V+) – 1.5 V,
110 120 dB
V
S
= ±2 V, T
A
= –40°C to +125°C
INPUT IMPEDANCE
Z
ID
Differential 100 || 6 MΩ || pF
Z
IC
Common-mode 6 || 9.5
10
12
Ω || pF
OPEN-LOOP GAIN
(V–) + 0.5 V < V
O
< (V+) – 0.5 V,
110 120 dB
R
L
= 5 kΩ
A
OL
Open-loop voltage gain (V–) + 0.5 V < V
O
< (V+) – 0.5 V 120 130 dB
(V–) + 0.5 V < V
O
< (V+) – 0.5 V,
110 120 dB
T
A
= –40°C to +125°C
FREQUENCY RESPONSE
GBW Gain-bandwidth product 2 MHz
SR Slew rate G = +1 0.8 V/μs
t
OR
Overload recovery time V
IN
× G = V
S
1 μs
THD+N Total harmonic distortion + noise 1 kHz, G = 1, V
OUT
= 1 Vrms 0.0001%
(1) V
S
/ 2 = midsupply.
(2) 1000-hour life test at +125°C demonstrated randomly distributed variation in the range of measurement limits—approximately 4 μV.
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