OPA830

SBOS263F − AUGUST 2004 − REVISED AUGUST 2008

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12

At TA = 25°C, G = +2, RF = 750Ω, RL = 150Ω to VS/2, and input VCM = 2.5V, unless otherwise noted (see Figure 1).

100

10

1

INPUT VOLTAGE AND CURRENT NOISE DENSITY

Frequency (Hz)

10

100

1k

10k

100k

1M

10M

Voltage Noise

(9.2nV/

√Hz)

Current Noise

(3.5pA/

√Hz)

130

120

110

100

90

80

70

60

50

40

30

20

10

RECOMMENDED R

Capacitive Load (pF)

1

10

100

1k

0dB Peaking Targeted

80

70

60

50

40

30

20

10

0

−10

−20

OPEN−LOOP GAIN AND PHASE

Frequency (Hz)

0

−20

−40

−60

−80

−100

−120

−140

−160

−180

−200

100

1k

10k

100k

1M

10M

100M

1G

20 log (A

∠(A

100

10

1

0.1

0.01

CLOSED−LOOP OUTPUT IMPEDANCE vs FREQUENCY

Frequency (Hz)

1k

10k

100k

1M

10M

100M

8

7

6

5

4

3

2

1

0

−1

−2

−3

FREQUENCY RESPONSE vs CAPACITIVE LOAD

Frequency (MHz)

1

10

100

300

C

C

C

750

Ω

R

S

O P A830

V

I

V

O

50

Ω

1k

750

Ω

NOTE: (1) 1k

Ωis optional.

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

−0.5

−1.0

VOLTAGE RANGES vs TEMPERATURE

Ambient Temperature (10

_C/div)

−50

0

50

110

Most Positive Output Voltage

Most Positive Input Voltage

Least Positive Output Voltage

Least Positive Input Voltage

R