ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4

Data Sheet

Rev. F | Page 12 of 24

0.01

0.1

1

10

100

0.01

0.1

1

10

100

FREQUENCY (MHz)

G = +1

Figure 31. Closed-Loop Output Impedance vs. Frequency, Device Enabled

100

0

–100

G = +1

50mV/DIV

10ns/DIV

Figure 32. Small-Signal Step Response, G = +1

1

0

–1

G = +1

0.5V/DIV

10ns/DIV

100k

10k

1k

100

10

1

0.01

0.1

1

10

100

FREQUENCY (MHz)

G = +1

Figure 34. Closed-Loop Output Impedance vs. Frequency, Device Disabled

(ADA4891-3 Only)

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

10

20

30

40

50

60

70

80

90

TIME (ns)

G = +2

Figure 35. Large-Signal Step Response, G = +2

0.5

0

–0.5

G = +1

0.5V/DIV

10ns/DIV