OPA3691

SBOS227E

8

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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.)

TA = +25°C, G = +2, and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted.

100

10

1

INPUT VOLTAGE AND CURRENT NOISE DENSITY

Frequency (Hz)

100

1k

10k

100k

1M

10M

Noninverting Input Current Noise (12pA/

√Hz)

Inverting Input Current Noise (15pA/

√Hz)

Voltage Noise (1.7nV/

√Hz)

–30

–40

–50

–60

–70

–80

–90

2-TONE, 3RD-ORDER

INTERMODULATION SPURIOUS

Single-Tone Load Power (dBm)

–8

–6

–4

–2

0

246

8

10

dBc = dB below carriers

50MHz

20MHz

10MHz

Load Power at Matched 50

Ω Load

70

60

50

40

30

20

10

0

RECOMMENDED R

S vs CAPACITIVE LOAD

Capacitive Load (pF)

1

10

100

1k

9

6

3

0

–3

–6

–9

Frequency (25MHz/div)

0

250MHz

125MHz

FREQUENCY RESPONSE vs CAPACITIVE LOAD

1/3

OPA3691

RS

VIN

VO

CL

1k

Ω

402

Ω

402

Ω

1k

Ω is optional.

C

L = 22pF

C

L = 10pF

C

L = 47pF

C

L = 100pF

65

60

55

50

45

40

35

30

25

20

CMRR AND PSRR vs FREQUENCY

Frequency (Hz)

1k

10k

100k

1M

10M

100M

+PSRR

CMRR

–PSRR

120

100

80

60

40

20

0

OPEN-LOOP TRANSIMPEDANCE GAIN/PHASE

Frequency (Hz)

10k

100k

1M

10M

100M

1G

0

–40

–80

–120

–160

–200

–240

|Z

OL|

∠ Z

OL