TVP3703

VIDEO INTERFACE PALETTE

TRUE-COLOR CMOS RAMDAC

SLAS100 – MARCH 1996

19

POST OFFICE BOX 655303

APPLICATION INFORMATION

COMP

XIN

XOUT

REF

RSET

AVDD

VDD

RED,

GREEN,

BLUE

GND

75

Ω

Monitor

75

Ω

D2 – D4

X1

C4

R2

R3 – R5

D1

C3

C2

R1

C1

Local AVDD Plane

L1

VDD

POWER SUPPLY

D5 – D7

TVP3703

Figure 4. Analog Interface – Recommended Circuit in Internal Voltage Reference Mode

Table of Parts for Recommended Circuit (see Figure 4)

PART NUMBER

VALUE

DESCRIPTION

C1

47

µF

Capacitor

C2† –C3‡

100 nF

Surface-mount capacitor

C4†

100 nF

Surface-mount capacitor

R1§

1 k

Ω

5% resistor

R2†

147

Ω

1% resistor

R3 – R5†

75

Ω

1% resistor

D1§

LM385BZ-1.2

Voltage reference

D2 – D7

1N4148

Diode

L1

1

µH

Inductor

X1

14.31818 MHz

Crystal

† Place these components as close to the palette DAC as possible.

‡ Placing this component between REF and AVDD does not affect

performance.

§ Omit these components when using the TVP3703 in internal

voltage reference mode.