Datasheet

OPA320, OPA2320
OPA320S, OPA2320S
www.ti.com SBOS513E –AUGUST 2010–REVISED JUNE 2013
ELECTRICAL CHARACTERISTICS: V
S
= +1.8V to +5.5V or ±0.9V to ±2.75V
Boldface limits apply over the specified temperature range, T
A
= –40°C to +125°C.
At T
A
= +25°C, R
L
= 10kΩ connected to V
S
/2, V
CM
= V
S
/2, V
OUT
= V
S
/2, and SHDN x = V
S+
, unless otherwise noted.
OPA320, OPA320S, OPA2320, OPA2320S
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
Input offset voltage V
OS
40 150 μV
vs Temperature dV
OS
/dT V
S
= +5.5V 1.5 5 μV/°C
vs Power supply PSR V
S
= +1.8V to +5.5V 5 20 μV/V
Over temperature V
S
= +1.8V to +5.5V 15 μV/V
Channel separation At 1kHz 130 dB
INPUT VOLTAGE
Common-mode voltage range V
CM
(V–) – 0.1 (V+) + 0.1 V
Common-mode rejection ratio CMRR V
S
= 5.5V, (V–) – 0.1V < V
CM
< (V+) + 0.1V 100 114 dB
Over temperature 96 dB
INPUT BIAS CURRENT
Input bias current I
B
±0.2 ±0.9 pA
T
A
= –40°C to +85°C ±50 pA
Over temperature OPA2320, OPA2320S, T
A
= –40°C to +125°C ±400 pA
OPA320, OPA320S, T
A
= –40°C to +125°C ±600 pA
Input offset current I
OS
±0.2 ±0.9 pA
T
A
= –40°C to +85°C ±50 pA
Over temperature
T
A
= –40°C to +125°C ±400 pA
NOISE
Input voltage noise f = 0.1Hz to 10Hz 2.8 μV
PP
f = 1kHz 8.5 nV/√Hz
Input voltage noise density e
n
f = 10kHz 7 nV/√Hz
Input current noise density i
n
f = 1kHz 0.6 fA/√Hz
INPUT CAPACITANCE
Differential 5 pF
Common-mode 4 pF
OPEN-LOOP GAIN
0.1V < V
O
< (V+) – 0.1V, R
L
= 10kΩ 114 132 dB
0.1V < V
O
< (V+) – 0.1V, R
L
= 10kΩ 100 130 dB
Open-loop voltage gain A
OL
0.2V < V
O
< (V+) – 0.2V, R
L
= 2kΩ 108 123 dB
0.2V < V
O
< (V+) – 0.2V, R
L
= 2kΩ 96 130 dB
Phase margin PM V
S
= 5V, C
L
= 50pF 47 Degrees
FREQUENCY RESPONSE V
S
= 5.0V, C
L
= 50pF
Gain bandwidth product GBP Unity gain 20 MHz
Slew rate SR G = +1 10 V/μs
To 0.1%, 2V step, G = +1 0.25 μs
Settling time t
S
To 0.01%, 2V step, G = +1 0.32 μs
To 0.0015%, 2V step, G = +1
(1)
0.5 μs
Overload recovery time V
IN
× G > V
S
100 ns
V
O
= 4V
PP
, G = +1, f = 10kHz, R
L
= 10kΩ 0.0005 %
Total harmonic distortion +
THD+N
noise
(2)
V
O
= 2V
PP
, G = +1, f = 10kHz, R
L
= 600Ω 0.0011 %
(1) Based on simulation.
(2) Third-order filter; bandwidth = 80kHz at –3dB.
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