Philips TDA8771H-C2-R1, TDA8775G-C1 Datasheet

DATA SH EET

Preliminary specification
File under Integrated Circuits, IC02

1996 Aug 14

INTEGRATED CIRCUITS

TDA8775

Triple 10-bit video Digital-to-Analog
Converter (DAC)

1996 Aug 14 2

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

V

DDA

analog supply voltage 4.5 5.0 5.5 V

V

DDD

digital supply voltage 4.5 5.0 5.5 V

I

DDA

analog supply current SLT = 1; RL= 37.5 Ω−67 tbf mA

SLT = 0; R

L

= 150 Ω−16 tbf mA

I

DDD

digital supply current SLT = 1; RL= 37.5 Ω−15 tbf mA

SLT = 0; R

L

= 150 Ω−10 tbf mA
INL DC integral non-linearity −±1±2 LSB
DNL DC differential non-linearity −±0.7 ±1.0 LSB
f

clk(max)

maximum clock frequency SLT = 1; RL= 37.5 Ω 50 −−MHz

SLT = 0; R

L

= 150 Ω 35 −−MHz
P

tot

total power dissipation SLT = 1; RL= 37.5 Ω;

f

clk

=50MHz

− 410 tbf mW

SLT = 0; R

L

= 150 Ω;

f

clk

=35MHz

− 130 tbf mW

TYPE

NUMBER

PACKAGE

NAME DESCRIPTION VERSION

TDA8775G LQFP48 plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm SOT313-2

1996 Aug 14 3

Philips Semiconductors Preliminary specification

Triple 10-bit video Digital-to-Analog
Converter (DAC)

TDA8775

BLOCK DIAGRAM

Fig.1 Block diagram.

handbook, full pagewidth

MGE965

6

6

10-7

6-1

24-21

20-15

35-32

31-26

14
13

48 39 12 36

42

40

43

47

44

46

25

11454138

6

4

4

4

CURRENT

SOURCE

MSB

DECODER

LSB

DECODER

CURRENT

REFERENCE

CURRENT

SOURCE

MSB

DECODER

LSB

DECODER

CURRENT

SOURCE

MSB

DECODER

LSB

DECODER

CONTROL

REGISTER

V

DDA1VDDA2VDDA3

V

DDD1

37

V

DDD2

OUTB

OUTG

OUTR

VSSA1

VSSA2

VSSA3

CLK

SLT reference current

decoupling input

(I

ref

)

V

SSD1VSSD2

red

digital inputs

(bits R0 to R3)

red

digital inputs

(bits R4 to R9)

green

digital inputs

(bits G0 to G3)

green

digital inputs

(bits G4 to G9)

blue

digital inputs

(bits B0 to B3)

blue

digital inputs

(bits B4 to B9)

BLANK

control input

SYNC

control input

TDA8775

1996 Aug 14 4

Philips Semiconductors Preliminary specification

Triple 10-bit video Digital-to-Analog
Converter (DAC)

TDA8775

PINNING

SYMBOL PIN DESCRIPTION

R9 1 red digital input data; bit 9 (MSB)
R8 2 red digital input data; bit 8
R7 3 red digital input data; bit 7
R6 4 red digital input data; bit 6
R5 5 red digital input data; bit 5
R4 6 red digital input data; bit 4
R3 7 red digital input data; bit 3
R2 8 red digital input data; bit 2
R1 9 red digital input data; bit 1
R0 10 red digital input data; bit 0 (LSB)
V

DDD1

11 digital supply voltage 1

V

SSD1

12 digital supply ground 1
SYNC 13 composite sync control input; for green channel only (active LOW)
BLANK 14 composite blank control input (active LOW)
G9 15 green digital input data; bit 9 (MSB)
G8 16 green digital input data; bit 8
G7 17 green digital input data; bit 7
G6 18 green digital input data; bit 6
G5 19 green digital input data; bit 5
G4 20 green digital input data; bit 4
G3 21 green digital input data; bit 3
G2 22 green digital input data; bit 2
G1 23 green digital input data; bit 1
G0 24 green digital input data; bit 0 (LSB)
CLK 25 clock input
B9 26 blue digital input data; bit 9 (MSB)
B8 27 blue digital input data; bit 8
B7 28 blue digital input data; bit 7
B6 29 blue digital input data; bit 6
B5 30 blue digital input data; bit 5
B4 31 blue digital input data; bit 4
B3 32 blue digital input data; bit 3
B2 33 blue digital input data; bit 2
B1 34 blue digital input data; bit 1
B0 35 blue digital input data; bit 0 (LSB)
V

SSD2

36 digital supply ground 2
V

DDD2

37 digital supply voltage 2
V

DDA1

38 analog supply voltage 1
I

ref

39 decoupling pin for reference current
V

SSA1

40 analog supply ground 1

1996 Aug 14 5

Philips Semiconductors Preliminary specification

Triple 10-bit video Digital-to-Analog
Converter (DAC)

TDA8775

V

DDA2

41 analog supply voltage 2
OUTB 42 blue analog output
V

SSA2

43 analog supply ground 2
OUTG 44 green analog output
V

DDA3

45 analog supply voltage 3
OUTR 46 red analog output
V

SSA3

47 analog supply ground 3
SLT 48 mode selection; normal mode, R

L

= 37.5 Ω (active HIGH); low power mode,

RL= 150 Ω (active LOW)

SYMBOL PIN DESCRIPTION

Fig.2 Pin configuration.

handbook, full pagewidth

1
2
3
4
5
6
7
8

9
10
11

36
35
34
33
32
31
30
29
28
27
26

13

14

15

16

17

18

19

20

21

22

23

48

47

46

45

44

43

42

41

40

39

38

12

24 37

25

TDA8775

MGE964

V

SSD2

B0
B1
B2

B4
B5
B6
B7
B8
B9
CLK

R9
R8
R7
R6
R5
R4

R2
R1

V

DDD1

V

SSD1

B3

V

SSA3

OUTR

V

DDA3

OUTG

V

SSA2

OUTB

V

SSA1

I

ref

V

DDA1

V

DDD2

SLT

V

DDA2

R3

R0

G9

G8

G7

G6

G5

G4

G2

G1

G0

G3

BLANK

SYNC