MC145192DT 查看數據表（PDF） - Motorola => Freescale

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MC145192DT

Low-Voltage 1.1 GHz PLL Frequency Synthesizer

Motorola => Freescale 

VPD (Pin 5)

Positive Supply Potential. This pin supplies power to both

phase/frequency detectors A and B. The voltage applied on

this pin must be ≥ VDD but not more than 5.5 V. The voltage

range for VPD is 4.5 to 5.5 V with respect to the GND pin

when using PDOUT and 2.7 to 5.5 V when using φR, φV out-

puts.

For optimum performance, VPD should be bypassed to

GND using a low–inductance capacitor mounted very close

to these pins. Lead lengths on the capacitor should be

minimized.

GND (Pin 7)

Common ground.

100

90

PDout CURRENT SET TO 100%;

80

PDout VOLTAGE IS FORCED TO ONE–HALF OF VPD.

70

60

50

40

30

20

VPD = 5.5 V

VPD = 5.0 V

10

VPD = 4.5 V

0

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3

Iout, SOURCE CURRENT (mA)

Nominal MC145192 PDout Source Current vs Rx Resistance

NOTE: The MC145192 is optimized for Rx values in the 18 kΩ to 40 kΩ range. For example, to achieve 0.3 mA of output current,

it is preferable to use a 30–kΩ resistor for Rx and bit settings for 25% (as shown in Table 3).

Figure 14.

MOTOROLA

MC145192

11

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