Data Sheet

AD8641/AD8642/AD8643

Rev. F | Page 11 of 15

0

10

20

30

40

50

60

70

CAPACITANCE (pF)

1

100

10

1000

OS+

OS–

Figure 37. Small Signal Overshoot vs. Load Capacitance

–1.0

–0.8

–0.6

–0.4

–0.2

0

0.2

0.4

0.6

0.8

1.0

–5

–4

–3

–2

–1

0

1

2

3

4

5

M1.00s

A CH1

–20.0V

1

G = +1M

CH1 p-p = 4.26V

Figure 38. 0.1 Hz to 10 Hz Noise

–1.0

–0.8

–0.6

–0.4

–0.2

0

0.2

0.4

0.6

0.8

1.0

–5

–4

–3

–2

–1

0

1

2

3

4

5

M1.00s

A CH1

–20.0V

1

G = +1M

CH1 p-p = 4.06V

Figure 39. 0.1 Hz to 10 Hz Noise

1

10

100

1k

FREQUENCY (Hz)

10

1k

100

10k

Figure 40. Voltage Noise Density

1

10

100

1k

FREQUENCY (Hz)

10

1k

100

10k

Figure 41. Voltage Noise Density

0.000001

0.00001

0.0001

0.001

1k

100

1

20k

FREQUENCY (Hz)

0.004

1V p-p INPUT

2V p-p INPUT

4V p-p INPUT

8V p-p INPUT

LOAD = 100k

Ω

GAIN = +1

10k

Figure 42. Total Harmonic Distortion + Noise vs. Frequency