AD608

Rev. C | Page 8 of 16

TEST CIRCUITS

PRUP INPUT

VPOS

51.1Ω

51.1Ω

0.1µF

1nF

1nF

332Ω

0.1µF

332Ω

301Ω

54.9Ω

IF INPUT

0.1µF

10nF

RSSI OUTPUT

100Ω

18nF

0.1µF

LMOP OUTPUT

TRIGGER

4.7kΩ

U1 – 74HC00

0.1µF

U1A

U1B

47kΩ

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

AD608

VPS1

COM1

RFHI

RFLO

MXOP

LOHI

COM2

VMID

PRUP

LMOP

COM3

RSSI

IFLO

VPS2

FDBK

IFHI

Figure 14. IF Test Board Schematic

IFHI

VPOS

RSSI

IF TEST BOARD

10.7MHz

FLUKE 6082A

SYNTHESIZER

DCPS

DC POWER

SUPPLY

(DCPS)

3V

AGILENT

HP3366A

DMM

DIGITAL

MULTIMETER

(DMM)

AGILENT

HP34401A

Figure 15. Test Circuit for IF RSSI Output vs. Input Power at IFHI and Supply

Voltage, Ambient Temperature (Figure 5); IF RSSI Output vs. Input Power and

Temperature, 3 V Supply (Figure 6); and RSSI Error vs. Input Power (Figure 7)

IFHI

VPOS

RSSI

IF TEST BOARD

AGILENT

HP3366A

FET

PROBE

TEKRONIX

P6201

CH 1

CH 2

COUPLER

MCL

ZDC-20-1

AGILENT

HP54120A

DIGITAL

OSCILLOSCOPE

3V

DCPS

10.7MHz

0dBm

FLUKE 6082A

SYNTHESIZER

Figure 16. Test Circuit for RSSI Pulse Response/RSSI Rise Time (Figure 9)

IFHI

VPOS

LMOP

IF TEST BOARD

3V

AGILENT

HP3366A

TEKRONIX

P6201

PRUP

CH 1

CH 2

AGILENT

HP54120A

DIGITAL

OSCILLOSCOPE

DCPS

10.7MHz

0dBm

FLUKE 6082A

SYNTHESIZER

FET

PROBE

Figure 17. Test Circuit for Limiter Power-Up Response Time (Figure 11)

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

AD608

VPS1

COM1

RFHI

RFLO

MXOP

LOHI

COM2

VMID

PRUP

LMOP

COM3

RSSI

IFLO

VPS2

FDBK

IFHI

VPOS

LO INPUT

RF INPUT

IF OUTPUT

NC

NC

0.1µF

1nF

51.1Ω

1nF

0.1µF

51.1Ω

1nF

0.1µF

10nF

18nF

18nF

NC = NO CONNECT

Figure 18. Mixer Test Board Schematic

IFHI

VPOS

RSSI

IF TEST BOARD

10.7MHz

0dBm

FLUKE 6082A

SYNTHESIZER

DCPS

AGILENT

HP3366A

FET

PROBE

TEKRONIX

P6201

PRUP

CH 1

CH 2

AGILENT

HP54120A

DIGITAL

OSCILLOSCOPE

3V

Figure 19. Test Circuit for RSSI Power-Up Response (Figure 8)

IFHI

VPOS

LMOP

IF TEST BOARD

10.7MHz

0dBm

FLUKE 6082A

SYNTHESIZER

DCPS

AGILENT

HP3366A

FET

PROBE

TEKRONIX

P6201

AGILENT

HP54120A

DIGITAL

OSCILLOSCOPE

3V

Figure 20. Test Circuit for Limiter Rise and Fall Times (Figure 10)

IFHI

RSSI

IF TEST BOARD

10.7MHz

FLUKE 6082A

SYNTHESIZER

DCPS

3V

AGILENT

HP3366A

FET

PROBE

TEKTRONIX

P6201

CH 1

TRIG

AGILENT

HP54120A

DIGITAL

OSCILLOSCOPE

MCL

ZDC-20-1

BPF

AGILENT

HP8447A

AGILENT

HP8494A

HP8495A

280kHz BW

10.7MHz CF

TOKO SK107MK1-A0-10

COUPLER

Figure 21. Test Circuit for Limiter Phase Performance vs. Input Power at IFHI

(Figure 12) and Limiter RMS Jitter Performance vs. Input Power at IFHI (Figure 13)