7

SP5669

RE

RTS

TS2

TS1

TS0

REF/COMP OUTPUT

Test mode description

MODE

0

0

X

X

X

Disabled to high state

Normal operation

0

1

X

0

0

Disabled to high state

Charge pump sink.

Status byte FL = logic ‘1’

0

1

X

0

1

Disabled to high state

Charge pump source.

Status byte FL = logic ‘0’

0

1

X

1

0

Disabled to high state

Charge pump disabled.

Status byte FL=logic ‘0’

0

1

X

1

1

Disabled to high state

Port P0 = F pd /2

0

1

1

X

X

Disabled to high state

Varactor Drive Output

disabled

1

0

XXX

F

Normal operation

1

1

XXX

F

comp

switched

Normal operation

X=don’t care

Fig. 5 REF/COMP output mode and Test modes

C1

C0

Current in

µA

byte 5, bit 1

byte 5, bit 2

min

typ

max

0

0

±90

±120

±150

01

±195

±260

±325

1

0

±416

±555

±694

11

±900

±1200

±1500

Fig 6. Charge pump current

300

100

50

10

1000

2000

3000

FREQUENCY (MHz)

3500

OPERATING

WINDOW

1000

2000

2700

3000

FREQUENCY (MHz)

3500

300

OPERATING

WINDOW

300

100

50

10

VIN

(mV RMS

INTO 50 )

VIN

(mV RMS

INTO 50 )

100

80

80

Fig. 7a Typical input sensitivity (prescaler disabled, PE=0)

Fig. 7b Typical input sensitivity (prescaler disabled, PE=1)