STV0042A datasheet(14/24 Pages) STMICROELECTRONICS

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750

µA

460

Ω

XTL

GND 0V

500

µA

5pF

460

Ω

750

µA

Figure 18

CPUMP L

CPUMP R

VCO Input

µA

Loop Filter Tracking

100

µA

100

µA

Dig Synth

Figure 19

DET L

DET R

Figure 20

PIN INTERNAL CIRCUITRY (continued)

XTL

CPUMP L, CPUMP R

An offset on the PLL loop filter will cause an offset

in the two 1

µA currents that will prevent the PLL

from drifting-off frequency.

DET L, DET R

I2 - I1 = f (phase error).

AMPLK L, AMPLK R, AGC L, AGC R

I2 and I1 from the amplitude detecting mixer.

REF 2.4V

AMPLK L

AMPLK R

10k

Ω

160

µA

AGC L

AGC R

To VCA

Figure 21

VREF

The 400

µA source is off during stand-by mode.

Vbg 1.2V

REF (2.4V)

10k

Ω

10k

Ω

GND 0V

400

µA

Figure 22

REF 2.4V

SUMOUT

50k

Ω

100

µA

49k

Ω

49k

Ω

Audio

Figure 23

REF 2.4V

PK IN

67k

Ω

100

µA

To Peak Det

Figure 24

SUMOUT

PK IN

V 12V

Doubled bonded (two bond wires and two pads for

one package pin) :

- One pad is connected to all of the 12V ESD and

video guard rings.

- The second pad is connected to power up the

video block.

V GND

Doubled bonded :

- One pad is connected to power-up all of the video

mux and I/O.

- The second pad is only as a low noise GND for

the video input.

VDD 5V, GND 5V

Connected to XTL oscillator and the bulk of the

CMOS logic and 5V ESD.

STV0042A

14/24

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