STW82102B datasheet(28/67 Pages) STMICROELECTRONICS

Teilenummer	STW82102B

Bauteilbeschribung	RF down converter with embedded integer-N synthesizer

PDF	67 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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General description

STW82102B

28/67

Doc ID 018516 Rev 2

Figure 13.

VCO typical sub-band characteristics

The SERCAL bit should be set to ’1’ at each division ratio change. The calibration takes

approximately 7 periods of the Comparison Frequency and the SERCAL bit is automatically

reset to ’0’ at the end of each calibration.

The maximum allowed FPFD to perform the calibration process is 1 MHz. If a higher FPFD is

used the following procedure should be adopted:

Calibrate the VCO at the desired frequency with an FPFD lower than 1 MHz

Set the A, B and R dividers ratio for the desired FPFD

For calibration details refer to Section 9.4.1: VCO calibration procedure (I2C interface) or

Section 10.4.1: VCO calibration procedure (SPI interface).

00000

00001

01111

11111

Calibrator lock

range

VCTRL (V)

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

STW82102B Datenblatt(PDF) 28 Page - STMicroelectronics