Datasheet

OPA378
OPA2378
www.ti.com SBOS417D –JANUARY 2008–REVISED OCTOBER 2009
ELECTRICAL CHARACTERISTICS: V
S
= +2.2V to +5.5V
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, and V
OUT
= V
S
/2, unless otherwise noted.
OPA378, OPA2378
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
Input Offset Voltage, OPA378 V
OS
V
CM
= V– 20 50 μV
vs Temperature dV
OS
/dT 0.1 0.25 μV/°C
Input Offset Voltage, OPA2378 20 70 µV
vs Temperature dV
OS
/dT -40°C to +125°C 0.25 0.4 µV/°C
–40°C to +85°C 0.15 0.25 µV/°C
vs Power Supply, OPA378 PSRR V
CM
= 0V, V
S
= +2.2V to +5.5V 1.5 5 μV/V
over Temperature V
CM
= 0V, V
S
= +2.2V to +5.5V 3 8 μV/V
vs Power Supply, OPA2378 V
CM
= 0V, V
S
= +2.2V to +5.5V 10 μV/V
over Temperature V
CM
= 0V, V
S
= +2.2V to +5.5V 3 13 μV/V
Channel Separation (Dual Version) At dc 135 dB
INPUT BIAS CURRENT
Input Bias Current, OPA378 I
B
±150 ±550 pA
Input Bias Current, OPA2378 ±150 ±670 pA
over Temperature, OPA378 and OPA2378 ±2 nA
Input Offset Current, OPA378 I
OS
±0.3 ±1.1 nA
Input Offset Current, OPA2378 ±0.3 ±1.34 nA
NOISE
Input Voltage Noise e
n
f = 0.1Hz to 10Hz, V
S
= +5.5V 0.4 μV
PP
Input Voltage Noise Density e
n
f = 1kHz 20 nV/√Hz
Input Current Noise i
n
f = 10Hz 200 fA/√Hz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range V
CM
(V–) – 0.05 (V+) + 0.05 V
Common-Mode Rejection Ratio CMRR (V–) – 0.05V < V
CM
< (V+) + 0.05V, V
S
= 5.5V 100 112 dB
(V–) – 0.05V < V
CM
< (V+) + 0.05V, V
S
= 2.2V 94 106 dB
over Temperature (V–) – 0.05V < V
CM
< (V+) + 0.05V, V
S
= 5.5V 96 dB
(V–) – 0.05V < V
CM
< (V+) + 0.05V, V
S
= 2.2V 90 dB
INPUT CAPACITANCE
Differential C
IN
4 pF
Common-Mode 5 pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain A
OL
50mV < V
O
< (V+) – 50mV, R
L
= 100kΩ 110 134 dB
100mV < V
O
< (V+) – 100mV, R
L
= 10kΩ 110 130 dB
over Temperature 100mV < V
O
< (V+) – 100mV, R
L
= 10kΩ 106 dB
FREQUENCY RESPONSE
Gain-Bandwidth Product GBW 900 kHz
Slew Rate SR G = +1 0.4 V/μs
Settling Time 0.1% t
S
V
S
= 5.5V, 2V Step, G = +1 7 μs
Settling Time 0.01% t
S
V
S
= 5.5V, 2V Step, G = +1 9 μs
Overload Recovery Time V
IN
× Gain > V
S
4 μs
THD + Noise THD + N V
S
= 5V, V
O
= 3V
PP
, G = +1, f = 1kHz 0.003 %
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