TDA8775 datasheet(2/16 Pages) PHILIPS

2 / 16 page

1996 Aug 14

Philips Semiconductors

Preliminary speciﬁcation

Triple 10-bit video Digital-to-Analog

Converter (DAC)

TDA8775

FEATURES

• 10-bit resolution

• Sampling rate up to:

– 50 MHz for normal mode; RL = 37.5 Ω

– 35 MHz for LOW power mode; RL = 150 Ω

• Internal current reference

• Current reference selector for:

– normal mode, RL = 37.5 Ω (typ.)

– low-power mode, RL = 150 Ω (typ.)

• No deglitching circuit required

• SYNC and BLANK control inputs

• 0.66 V output voltage range on red and blue channels

• 1 V output voltage range on green channel

(including sync)

• BLANK control input on the 3 channels

• + 5 V power supply.

APPLICATIONS

• General purpose high-speed digital-to-analog

conversion

• Digital TV

• Graphic display

• Desktop video processing.

GENERAL DESCRIPTION

The TDA8775 consists of three 10-bit video

Digital-to-Analog Converters (DACs). They convert the

digital input signals into current outputs at a maximum

conversion rate of 50 MHz.

The DACs are based on current source architecture with

selectable current reference.

The devices are fabricated in a 5 V CMOS process that

ensures high functionality with low power dissipation.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

VDDA

analog supply voltage

4.5

5.0

5.5

VDDD

digital supply voltage

4.5

5.0

5.5

IDDA

analog supply current

SLT = 1; RL = 37.5 Ω−

tbf

SLT = 0; RL = 150 Ω−

tbf

IDDD

digital supply current

SLT = 1; RL = 37.5 Ω−

tbf

SLT = 0; RL = 150 Ω−

tbf

INL

DC integral non-linearity

−±1

±2

LSB

DNL

DC differential non-linearity

−±0.7

±1.0

LSB

fclk(max)

maximum clock frequency

SLT = 1; RL = 37.5 Ω

−−

MHz

SLT = 0; RL = 150 Ω

−−

MHz

Ptot

total power dissipation

SLT = 1; RL = 37.5 Ω;

fclk =50MHz

−

410

tbf

SLT = 0; RL = 150 Ω;

fclk =35MHz

−

130

tbf

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA8775G

LQFP48

plastic low proﬁle quad ﬂat package; 48 leads; body 7

× 7 × 1.4 mm

SOT313-2

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