TDA7512F datasheet(43/45 Pages) STMICROELECTRONICS

部件名	TDA7512F

功能描述	FM car-radio tuner IC with intelligent selectivity system (ISS)

PDF	45 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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43 / 45 page

TDA7512F

Application notes

Doc ID 12668 Rev 2

43/45

Appendix B

Application notes

Following items are important to get highest performance of TDA7512F in application:

In order to avoid leakage current from PLL loop filter input to ground a guardring is

recommended around loop filter PIN’s with PLL reference voltage potential.

Distance between Xtal and VCO input PIN 18 should be far as possible and Xtal

package should get a shield versus ground.

Blocking of VCO supply should be near at PIN 16 and PIN 17.

Wire lenght to FM mixer1 input and output should be symetrically and short.

FM demodulator capacitance at PIN 44 should be sense connected as short as

possible versus demodulator ground at PIN 47.

With respect to THD capacitive coupling from PIN 20 to VCO should be avoided.

Capacitance at PIN 20 has be connected versus VCC2 ground.

TDA7512F 数据表(PDF) 43 Page - STMicroelectronics