OPA381

OPA2381

SBOS313B − AUGUST 2004 − REVISED NOVEMBER 2004

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7

TYPICAL CHARACTERISTICS: VS = +2.7V to +5.5V (continued)

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

SMALL−SIGNAL STEP RESPONSE

(with or without pull−down)

Time (100ns/div)

50k

Ω

10k

Ω

CF

VP

200kHz (C

F = 16pF)

1MHz

(C

F = 3pF)

V

P =0V or − 5V

OPA381

LARGE−SIGNAL STEP RESPONSE

(with pull−down)

Time (100ns/div)

50k

Ω

10k

Ω

3pF

−5V

OPA3 81

LARGE−SIGNAL STEP RESPONSE

(without pull−down)

Time (100ns/div)

50k

Ω

10k

Ω

CF

1MHz

(C

F =3pF)

200kHz

(C

F =16pF)

OPA381

OVERLOAD RECOVERY

Time (ns)

6

4

2

0

0.8

0

0

100

200

300

400

500

600

700

800

900 1000

V

OUT

20k

Ω

10k

Ω

IIN

VP

40pF

250

µA

I

IN

Nonlinear

Operation

Linear

Operation

OPA381

OPA2381

V

P =0V or − 5V

OPA381

1000

100

10

1

INPUT VOLTAGE NOISE SPECTRAL DENSITY

Frequency (Hz)

10

100

100k

1M

10k

1k

10M

CHANNEL SEPARATION vs INPUT FREQUENCY

Input Frequency (Hz)

160

140

120

100

80

60

40

20

0

−20

−40

10

100

1k

10k

100k

1M

10M

100M

OPA2381