OPA381

OPA2381

SBOS313B − AUGUST 2004 − REVISED NOVEMBER 2004

www.ti.com

4

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

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

140

120

100

80

60

40

20

0

−20

OPEN−LOOP GAIN AND PHASE vs FREQUENCY

Frequency (Hz)

200

150

100

50

0

−50

−100

−150

−200

10

100k

1M

100

1k

10k

100M

10M

Phase

Gain

140

120

100

80

60

40

20

0

−20

−40

−60

POWER−SUPPLY REJECTION RATIO AND

COMMON−MODE REJECTION vs FREQUENCY

Frequency (Hz)

10

100k

1M

100

1k

10k

100M

10M

PSRR

CMRR

90

80

70

60

50

40

30

20

10

PHASE MARGIN vs LOAD CAPACITANCE

C

L Load Capacitance (pF)

0

100

200

300

400

500

600

700

900

800

1000

R

S =100Ω

R

S =50Ω

R

S =0Ω

50k

Ω

100pF

R

S

C

L

1.00

0.90

0.85

0.80

0.75

0.70

0.65

0.60

0.55

0.50

QUIESCENT CURRENT vs TEMPERATURE

2.7V

5.5V

Temperature (

_C)

−40

100

125

−25

0

25

50

75

QUIESCENT CURRENT vs SUPPLY VOLTAGE

Supply Voltage (V)

2.73.1

3.5

3.9

4.34.7

5.15.5

1.00

0.90

0.85

0.80

0.75

0.70

0.65

0.60

0.55

0.50

1000

100

10

1

INPUT BIAS CURRENT vs TEMPERATURE

Temperature (

_C)

−40

100

125

−25

0

25

50

75