Symbol

Parameter

Condition

Min

Typ

Max

Units

IF PLL

f

Fin

Operating Frequency

(Note 8)

LMX2502LQ1635

IF_FREQ [1:0] = 10,

Default Value

440.76

MHz

LMX2512LQ0967

IF_FREQ [1:0] = 00,

Default Value

170.76

MHz

LMX2512LQ1065

IF_FREQ [1:0] = 01,

Default Value

367.20

MHz

P

Fin

IF Input Sensitivity

-10

0

dBm

Phase Detector Frequency

120

kHz

I

CPout

Charge Pump Current

IF_CUR [1:0] = 00

100

µA

IF_CUR [1:0] = 01

200

µA

IF_CUR [1:0] = 10

300

µA

IF_CUR [1:0] = 11

800

µA

DIGITAL INTERFACE (DATA, CLK, LE, LD, CE)

V

IH

High-Level Input Voltage

0.8 V

DD

V

DD

V

0.8 V

CC

V

CC

V

V

IL

Low-Level Input Voltage

0

0.2 V

DD

V

0

0.2 V

CC

V

I

IH

High-Level Input Current

-10

10

µA

I

IL

Low-Level Input Current

-10

10

µA

Input Capacitance

3

pF

V

OH

High-Level Output Voltage

0.9 V

DD

V

0.9 V

CC

V

V

OL

Low-Level Output Voltage

0.1 V

DD

V

0.1 V

CC

V

Output Capacitance

5pF

MICROWIRE INTERFACE TIMING

t

CS

Data to Clock Set Up Time

50

-

-

ns

t

CH

Data to Clock Hold Time

10

-

-

ns

t

CWH

Clock Pulse Width HIGH

50

-

-

ns

t

CWL

Clock Pulse Width LOW

50

-

-

ns

t

ES

Clock to Latch Enable Set Up Time

50

-

-

ns

t

EW

Latch Enable Pulse Width

50

-

-

ns

Note 4: In power down mode, set DATA, CLK, and LE pins to 0 V (GND).

Note 5: The reference frequency must also be programmed using the OSC_FREQ control bit. For other reference frequencies, please contact National

Semiconductor.

Note 6: For other frequency ranges, please contact National Semiconductor.

Note 7: Lock time is defined as the time difference between the beginning of the frequency transition and the point at which the frequency remains within +/- 1 kHz

of the final frequency.

Note 8: Frequencies other that the default value can be programmed using Words R4 and R5. See Programming Description for details.

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