Datasheet

OPA2188
www.ti.com SBOS525B –AUGUST 2011–REVISED SEPTEMBER 2012
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, and V
COM
= V
OUT
= V
S
/ 2, unless otherwise noted.
OPA2188
PARAMETER CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
6 25 μV
V
OS
Input offset voltage
T
A
= –40°C to +105°C 0.03 0.085 μV/°C
V
S
= 4 V to 36 V, V
CM
= V
S
/ 2 0.075 0.3 μV/V
PSRR Power-supply rejection ratio
V
S
= 4 V to 36 V, V
CM
= V
S
/ 2,
0.3 μV/V
T
A
= –40°C to +105°C
Long-term stability 4
(1)
μV
Channel separation, dc 1 μV/V
INPUT BIAS CURRENT
V
CM
= V
S
/ 2 ±160 ±850 pA
I
B
Input bias current
T
A
= –40°C to +105°C ±4 nA
±320 ±1700 pA
I
OS
Input offset current
T
A
= –40°C to +105°C ±2 nA
NOISE
Input voltage noise f = 0.1 Hz to 10 Hz 0.25 μV
PP
e
n
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 +105°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 +105°C
INPUT IMPEDANCE
Differential 100 || 6 MΩ || pF
Common-mode 6 || 95
10
12
Ω || pF
OPEN-LOOP GAIN
(V–) + 500 mV < V
O
< (V+) – 500 mV,
110 120 dB
R
L
= 5 kΩ, V
S
= 5 V
(V–) + 500 mV < V
O
< (V+) – 500 mV,
A
OL
Open-loop voltage gain 120 130 dB
R
L
= 10 kΩ
(V–) + 500 mV < V
O
< (V+) – 500 mV,
114 120 dB
R
L
= 10 kΩ, T
A
= –40°C to +105°C
FREQUENCY RESPONSE
GBW Gain-bandwidth product 2 MHz
SR Slew rate G = +1 0.8 V/μs
Overload recovery time V
IN
× G = V
S
1 μs
THD+N Total harmonic distortion + noise 1 kHz, G = 1, V
OUT
= 1 V
RMS
0.0001 %
(1) 1000-hour life test at +125°C demonstrated randomly distributed variation in the range of measurement limits—approximately 4 μV.
Copyright © 2011–2012, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: OPA2188