AD8312

Rev. 0| Page 10 of 20

VOUT

RF INPUT

PULSED RF

0.1GHz, 0dBm

200mV/VERT DIV

FALL TIME 120ns

RISE TIME 85ns

500mV/

VERT DIV

100ns/HORIZ DIV

Figure 15. VOUT Response Time, RF Off to 0 dBm

AD8312

NC = NO CONNECT

RFIN

1

COMM

2

CFLT

3

VPOS

6

VOUT

5

VSET

NC

4

0.1

µF

3V

TEKTRONIX

TDS51504

SCOPE

*50

Ω TERMINATION

ROHDE & SCHWARZ

SMT06 GENERATOR

PULSE MODULATION

RF OUT

+3dB

TRIG OUT

RF

SPLITTER

52.3

Ω

–3dB

–3dB

CH1

CH3*

TRIG

Figure 16. Test Setup for Pulse Response

12

0.5

0.2

–j1

–j0.5

–j0.2

0

+j0.2

+j0.5

+j1

+j2

2.2GHz

3.5GHz

–j2

0.1GHz

0.9GHz

1.9GHz

2.5GHz

Figure 17. Input Impedance vs. Frequency; No Termination Resistor on RFIN

VPOS

1

µs/HORIZ DIV

500mV/VERT DIV

2V/VERT DIV

VOUT

Figure 18. Power-On and Power-Off Response

AD8312

NC = NO CONNECT

RFIN

1

COMM

2

CFLT

3

VPOS

6

VOUT

5

VSET

NC

4

AD811

732

Ω

HP8648B

SIGNAL

GENERATOR

20dBm

HP8116A

PULSE

GENERATOR

TEKTRONIX

TDS784C

SCOPE

TEKTRONIX

P6204

FET PROBE

PULSE

OUT

49.9

Ω

TRIG

OUT

TRIG

RF OUT

10MHz

REF OUTPUT

EXT

TRIG

52.3

Ω

Figure 19. Test Setup for Power-On and Power-Off Response

10k

1k

100

10

1

1

3

10

30

100

300

1k

3k

10k

FREQUENCY (kHz)

0dBm

–10dBm

–20dBm

–40dBm

–60dBm

RF OFF

Figure 20. Noise Spectral Density of Output; CFLT = Open