AD8311

Rev. A | Page 9 of 24

GND

GND

200mV PER

VERTICAL

DIVISION

VAPC

1V PER

VERTICAL

DIVISION

2

μs PER

HORIZONTAL

DIVISION

VPOS

Figure 15. Power-On and -Off Response with VSET Grounded

TEK TDS694C

SCOPE

TRIG

TEK P6205

FET PROBE

VPOS

VAPC

VSET

RFIN

COMM

FLTR

AD8311

1

2

3

4

5

6

220pF

52.3

Ω

STANFORD DS345

PULSE

GENERATOR

PULSE OUT

TRIG

OUT

R AND S SMT03

SIGNAL

GENERATOR

RF OUT

10MHz REF

OUTPUT

EXT TRIG

AD811

TEK P6205

FET PROBE

49.9

Ω

732

Ω

Figure 16. Test Setup for Power-On and -Off Response with VSET Grounded

FREQUENCY (Hz)

45

10

35

25

15

5

–5

–15

–25

–35

100

1k

10k

100k

1M

10M

0

–20

–40

–60

–80

–100

–120

40

20

0

–20

30

10

–10

–30

–40

–10

–30

–50

–70

–90

–110

–130

CFLT = 220pF

CFLT = 0pF

Figure 17. AC Response from VSET to VAPC

GND

GND

1V PER

VERTICAL

DIVISION

VAPC

RF

INPUT

PULSED RF

0.1GHz, 0dBm 100ns PER

HORIZONTAL

DIVISION

Figure 18. VAPC Response Time, Full-Scale Amplitude Change, Open-Loop

VPOS

VAPC

VSET

RFIN

COMM

FLTR

AD8311

1

2

3

4

5

6

2.7V

0.1

μF

TEK P6205

FET PROBE

TEK TDS694C

SCOPE

TRIG

PICOSECOND

PULSE LABS

PULSE

GENERATOR

TRIG

OUT

R AND S SMT03

SIGNAL

GENERATOR

PULSE

MODULATION

MODE

10MHz REF

OUTPUT

EXT TRIG

PULSE MODE IN

OUT

RF OUT

–3dB

–3dB

0.3V

RF

SPLITTER

52.3

Ω

NC

NC = NO CONNECT

Figure 19. Test Setup for VAPC Response Time

10k

10

100

10M

FREQUENCY (Hz)

100

1k

1k

10k

100k

1M

–35dBm

0dBm

–20dBm

–10dBm

–30dBm

–38dBm

–40dBm

–50dBm

CFLT = 220pF, RF INPUT = 2GHz

Figure 20. VAPC Noise Spectral Density