Datasheet

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SBOS313B − AUGUST 2004 − REVISED NOVEMBER 2004
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3
ELECTRICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V
Boldface limits apply over the temperature range, T
A
= −40°C to +125°C.
All specifications at T
A
= +25°C, R
L
= 10kΩ connected to V
S
/2, and V
OUT
= V
S
/2, unless otherwise noted.
OPA381
PARAMETER CONDITION
MIN TYP MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage V
OS
V
S
= +5V, V
CM
= 0V 7 25 µV
Drift dV
OS
/dT 0.03 0.1 µV/°C
vs Power Supply PSRR V
S
= +2.7V to +5.5V, V
CM
= 0V 3.5 20 µV/V
Over Temperature V
S
= +2.7V to +5.5V, V
CM
= 0V 20 µV/V
Long-Term Stability
(1)
See Note (1)
Channel Separation, dc 1 µV/V
INPUT BIAS CURRENT
Input Bias Current I
B
V
CM
= V
S
/2 3 ±50 pA
Over Temperature See Typical Characteristics
Input Offset Current I
OS
V
CM
= V
S
/2 6 ±100 pA
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz e
n
V
S
= +5V, V
CM
= 0V 3 µV
PP
Input Voltage Noise Density, f = 10kHz e
n
V
S
= +5V, V
CM
= 0V 70 nV/√Hz
Input Voltage Noise Density, f > 1MHz e
n
V
S
= +5V, V
CM
= 0V 10 nV/√Hz
Input Current Noise Density, f = 10kHz i
n
V
S
= +5V, V
CM
= 0V 20 fA/√Hz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range V
CM
V− (V+) − 1.8V V
Common-Mode Rejection Ratio CMRR V
S
= +5V, (V−) < V
CM
< (V+) − 1.8V 95 110 dB
INPUT IMPEDANCE
Differential Capacitance 1 pF
Common-Mode Resistance and Capacitance 10
13
|| 2.5 Ω || pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain A
OL
0.05V < V
O
< (V+) − 0.6V, V
CM
= V
S
/2, V
S
= 5V 110 135 dB
0V < V
O
< (V+) − 0.6V, V
CM
= 0V, R
P
= 10kΩ to −5V
(2)
, V
S
= 5V 106 135 dB
FREQUENCY RESPONSE
Gain-Bandwidth Product GBW 18 MHz
Slew Rate SR G = +1 12 V/µs
Settling Time, 0.0015%
(3)
V
S
= +5V, 4V Step, G = +1, OPA381 7 µs
Settling Time, 0.003%
(3)
V
S
= +5V, 4V Step, G = +1, OPA2381 7 µs
Overload Recovery Time
(4), (5)
V
IN
• G = > V
S
200 ns
OUTPUT
Voltage Output Swing from Positive Rail R
L
= 10kΩ 400 600 mV
Voltage Output Swing from Negative Rail R
L
= 10kΩ 30 50 mV
Voltage Output Swing from Positive Rail R
P
= 10kΩ to −5V
(2)
400 600 mV
Voltage Output Swing from Negative Rail R
P
= 10kΩ to −5V
(2)
−20 0 mV
Output Current I
OUT
10 mA
Short-Circuit Current I
SC
20 mA
Capacitive Load Drive C
LOAD
See Typical Characteristics
Open-Loop Output Impedance R
O
F = 1MHz, I
O
= 0 250 Ω
POWER SUPPLY
Specified Voltage Range V
S
2.7 5.5 V
Quiescent Current (per amplifier) I
Q
I
O
= 0A 0.8 1 mA
Over Temperature 1.1 mA
TEMPERATURE RANGE
Specified and Operating Range −40 +125 °C
Storage Range −65 +150 °C
Thermal Resistance q
JA
MSOP-8 150 °C/W
DFN-8 65 °C/W
(1)
High temperature operating life characterization of zero-drift op amps applying the techniques used in the OPA381 have repeatedly demonstrated randomly
distributed variation approximately equal to measurement repeatability of 1µV. This consistency gives confidence in the stability and repeatability of these zero-
drift techniques.
(2)
Tested with output connected only to R
P
, a pulldown resistor connected between V
OUT
and −5V, as shown in Figure 3. See also Applications section, Achieving
Output Swing to Negative Rail.
(3)
Transimpedance frequency of 250kHz.
(4)
Time required to return to linear operation.
(5)
From positive rail.