OPA381

OPA2381

SBOS313B − AUGUST 2004 − REVISED NOVEMBER 2004

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3

ELECTRICAL CHARACTERISTICS: VS = +2.7V to +5.5V

Boldface limits apply over the temperature range, TA = −40°C to +125°C.

All specifications at TA = +25°C, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.

OPA381

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

OFFSET VOLTAGE

Input Offset Voltage

VOS

VS = +5V, VCM = 0V

7

25

µV

Drift

dVOS/dT

0.03

0.1

µV/°C

vs Power Supply

PSRR

VS = +2.7V to +5.5V, VCM = 0V

3.5

20

µV/V

Over Temperature

VS = +2.7V to +5.5V, VCM = 0V

20

µV/V

Long-Term Stability(1)

See Note (1)

Channel Separation, dc

1

µV/V

INPUT BIAS CURRENT

Input Bias Current

IB

VCM = VS/2

3

±50

pA

Over Temperature

See Typical Characteristics

Input Offset Current

IOS

VCM = VS/2

6

±100

pA

NOISE

Input Voltage Noise, f = 0.1Hz to 10Hz

en

VS = +5V, VCM = 0V

3

µVPP

Input Voltage Noise Density, f = 10kHz

en

VS = +5V, VCM = 0V

70

nV/

√Hz

Input Voltage Noise Density, f > 1MHz

en

VS = +5V, VCM = 0V

10

nV/

√Hz

Input Current Noise Density, f = 10kHz

in

VS = +5V, VCM = 0V

20

fA/

√Hz

INPUT VOLTAGE RANGE

Common-Mode Voltage Range

VCM

V−

(V+) − 1.8V

V

Common-Mode Rejection Ratio

CMRR

VS = +5V, (V−) < VCM < (V+) − 1.8V

95

110

dB

INPUT IMPEDANCE

Differential Capacitance

1

pF

Common-Mode Resistance and Capacitance

1013|| 2.5

Ω || pF

OPEN-LOOP GAIN

Open-Loop Voltage Gain

AOL

0.05V < VO < (V+) − 0.6V, VCM = VS/2, VS = 5V

110

135

dB

0V < VO < (V+) − 0.6V, VCM = 0V, RP = 10kΩ to −5V(2), VS = 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)

VS = +5V, 4V Step, G = +1, OPA381

7

µs

Settling Time, 0.003%(3)

VS = +5V, 4V Step, G = +1, OPA2381

7

µs

Overload Recovery Time(4), (5)

VIN • G = > VS

200

ns

OUTPUT

Voltage Output Swing from Positive Rail

RL = 10kΩ

400

600

mV

Voltage Output Swing from Negative Rail

RL = 10kΩ

30

50

mV

Voltage Output Swing from Positive Rail

RP = 10kΩ to −5V(2)

400

600

mV

Voltage Output Swing from Negative Rail

RP = 10kΩ to −5V(2)

−20

0

mV

Output Current

IOUT

10

mA

Short-Circuit Current

ISC

20

mA

Capacitive Load Drive

CLOAD

See Typical Characteristics

Open-Loop Output Impedance

RO

F = 1MHz, IO = 0

250

Ω

POWER SUPPLY

Specified Voltage Range

VS

2.7

5.5

V

Quiescent Current (per amplifier)

IQ

IO = 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

qJA

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 1

µV. This consistency gives confidence in the stability and repeatability of these zero-

drift techniques.

(2) Tested with output connected only to RP, a pulldown resistor connected between VOUT 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.