MC1658

MOTOROLA

HIPERCOMM

BR1334 — Rev 4

4

Figure 3. Output Frequency versus Capacitance

for Various Values of Input Voltage

Figure 4. RMS Noise Deviation versus

Operating Frequency

Figure 5. Frequency Capacitance Product versus Control Voltage (VCX)

1000

1

cx (pF)

100

10

1

0.1

10

100

1000

10,000

10,000

0.1

f, OPERATING FREQUENCY (MHz)

1000

100

10

1

10

100

1600

–2

VCX, INPUT VOLTAGE (Vdc)

–1.8

1500

1400

1300

1200

1100

1000

900

800

700

600

500

400

300

200

–1.6

–1.4

–1.2

–1

– 0.8 – 0.6 – 0.4 – 0.2

0

cx (pF) = FREQUENCY–CAPACITANCE PRODUCT AT

DC CONTROL INPUT = 4 Vdc

VCX = 0 Vdc

150 MHz @ 5 pF

75 MHz @ 5 pF

35 MHz @ 5 pF

VCX = – 2 Vdc

VCX = –1 Vdc

VCC = + 5.2 Vdc

VEE = 0 Vdc

VEE = –5.2V, VCC = 0V.

For Use at VEE = 0V, VCC = +5V (VCXP = +5V – VCX)

VCXP = Positive Input Voltage