Philips TDA8772AH-3, TDA8772H-8, TDA8772H-3, TDA8772AH-8 Datasheet

INTEGRATED CIRCUITS

TDA8772; TDA8772A

Triple 8-bit video digital-to-analog converter

Product specification

1995 Mar 09

Supersedes data of May 1994

File under Integrated Circuits, IC02

Philips Semiconductors

Philips Semiconductors	Product specification

Triple 8-bit video digital-to-analog

TDA8772; TDA8772A

converter

FEATURES

∙8-bit resolution

∙Sampling rate up to

35 MHz for TDA8772H/3, TDA8772AH/3

85 MHz for TDA8772H/8, TDA8772AH/8

∙Internal reference voltage regulator

∙No deglitching circuit required

∙SYNC, BLANK control inputs

∙3 independent clock inputs (one per DAC)

∙1 V output voltage range

∙75 Ω output load

∙TDA8772A has BLANK control input on the GREEN channel only while TDA8772 has it on the 3 channels

∙Single 5 V power supply

∙44-pin QFP package.

APPLICATIONS

∙General purpose high-speed digital-to-analog conversion

∙Digital TV

∙Graphic display

∙Desktop video processing.

ORDERING INFORMATION

GENERAL DESCRIPTION

The TDA8772, TDA8772A are triple 8-bit video digital-to-analog converters (DACs). They convert the digital input signals into analog voltage outputs at a maximum conversion rate of 35 MHz (TDA8772H/3, TDA8772AH/3) and 85 MHz (TDA8772H/8, TDA8772AH/8).

The DACs are based on resistor-string architecture with integrated output buffers. The output voltage range is determined by a built-in reference source.

The devices are fabricated in a 5 V CMOS process that ensures high functionality with low power dissipation.

TYPE NUMBER			PACKAGE			SAMPLING
	PINS	PIN POSITION		MATERIAL	CODE	FREQUENCY
TDA8772H/3	44	QFP44		plastic	SOT307B	35 MHz
TDA8772AH/3	44	QFP44		plastic	SOT307B	35 MHz
TDA8772H/8	44	QFP44		plastic	SOT307B	85 MHz
TDA8772AH/8	44	QFP44		plastic	SOT307B	85 MHz

1995 Mar 09

2

Philips Semiconductors	Product specification

Triple 8-bit video digital-to-analog

TDA8772; TDA8772A

converter

QUICK REFERENCE DATA

SYMBOL	PARAMETER	CONDITIONS	MIN.	TYP.	MAX.	UNIT
VDDA	analog supply voltage		4.5	5.0	5.5	V
VDDD	digital supply voltage		4.5	5.0	5.5	V
IDDA	analog supply current	RL = 75 Ω; note 1	40	65	100	mA
IDDD	digital supply current
	TDA8772H/3, TDA8772AH/3		−	7	16	mA
	TDA8772H/8, TDA8772AH/8		−	16	27	mA
INL	integral non-linearity2	fclk = 35 MHz; ramp input	−	±0.5	±1	LSB
		fclk = 85 MHz; ramp input	−	±0.75	±1.2	LSB
DNL	differential non-linearity	fclk = 35 MHz; ramp input	−	±0.25	±0.5	LSB
		fclk = 85 MHz; ramp input	-	±0.5	±0.75	LSB
fclk(max)	maximum clock frequency
	TDA8772H/3, TDA8772AH/3		35	−	−	MHz
	TDA8772H/8, TDA8772AH/8		85	−	−	MHz
Ptot	total power dissipation	note 1
	TDA8772H/3, TDA8772AH/3	RL = 75 Ω; fclk = 35 MHz	180	360	640	mW
	TDA8772H/8, TDA8772AH/8	RL = 75 Ω; fclk = 85 MHz	180	405	700	mW

Note

1.Minimum and maximum data of current and power consumption are measured in worse case conditions: for minimum data, all digital inputs are at logic level 0 while for maximum data, all digital inputs are at logic level 1.

1995 Mar 09

3

Philips Semiconductors	Product specification

Triple 8-bit video digital-to-analog

TDA8772; TDA8772A

converter

BLOCK DIAGRAMS
handbook, full pagewidth				V DDA	V DDD
RED	4			35,39,43		10,32
		8–5						41	reference
digital inputs
					4				current input
(bits R0 to R3)
									(I REFB )
		TDA8772			LSB			21	RED
					DECODER				clock input
RED	4	4–1		MSB	RESISTOR			44	RED
digital inputs			4
				DECODER	STRING				analog output
(bits R4 to R7)
GREEN	4	20–17
digital inputs					4
(bits G0 to G3)
					LSB			22	GREEN
					DECODER				clock input
GREEN	4	16–13		MSB	RESISTOR			40	GREEN
digital inputs			4
				DECODER	STRING				analog output
(bits G4 to G7)
BLUE	4	31–28
digital inputs					4
(bits B0 to B3)
					LSB			23	BLUE
					DECODER				clock input
BLUE	4	27–24		MSB	RESISTOR			36	BLUE
digital inputs
			4	DECODER	STRING				analog output
(bits B4 to B7)
BLANK		12
control input								38	reference current
			CONTROL		BANDGAP
		11							input for internal
			REGISTER		REFERENCE
SYNC									reference
control input					34		37,42	9,33	(I REFA )
					reference voltage		VSSA	V SSD	MBB661 - 2
					decoupling input
					(V REF )

Fig.1 Block diagram for TDA8772.

1995 Mar 09

4

Philips Semiconductors	Product specification

Triple 8-bit video digital-to-analog

TDA8772; TDA8772A

converter

handbook, full pagewidth				V DDA	V DDD
RED	4			35,39,43		10,32
		8–5						41	reference
digital inputs
					4				current input
(bits R0 to R3)
									(I REFB )
		TDA8772A			LSB			21	RED
					DECODER				clock input
RED	4	4–1		MSB	RESISTOR			44	RED
digital inputs			4
				DECODER	STRING				analog output
(bits R4 to R7)
GREEN	4	20–17
digital inputs					4
(bits G0 to G3)
					LSB			22	GREEN
					DECODER				clock input
GREEN	4	16–13		MSB	RESISTOR			40	GREEN
digital inputs			4
				DECODER	STRING				analog output
(bits G4 to G7)
BLUE	4	31–28
digital inputs					4
(bits B0 to B3)
					LSB			23	BLUE
					DECODER				clock input
BLUE	4	27–24		MSB	RESISTOR			36	BLUE
digital inputs
			4	DECODER	STRING				analog output
(bits B4 to B7)
BLANK		12
control input								38	reference current
			CONTROL		BANDGAP
		11							input for internal
			REGISTER		REFERENCE
SYNC									reference
control input					34		37,42	9,33	(I REFA )
					reference voltage		VSSA	V SSD	MLB724
					decoupling input
					(V REF )

Fig.2 Block diagram for TDA8772A.

1995 Mar 09

5

Philips Semiconductors	Product specification

Triple 8-bit video digital-to-analog

TDA8772; TDA8772A

converter

PINNING

	SYMBOL			PIN	DESCRIPTION
	R7			1	RED digital input data; bit 7 (MSB)
	R6			2	RED digital input data; bit 6
	R5			3	RED digital input data; bit 5
	R4			4	RED digital input data; bit 4
	R3			5	RED digital input data; bit 3
	R2			6	RED digital input data; bit 2
	R1			7	RED digital input data; bit 1
	R0			8	RED digital input data; bit 0 (LSB)
	VSSD1			9	digital supply ground 1
	VDDD1			10	digital supply voltage 1
				11	composite sync control input; for GREEN channel only (active LOW)
	SYNC
				12	composite blank control input (active LOW)
	BLANK
	G7			13	GREEN digital input data; bit 7 (MSB)
	G6			14	GREEN digital input data; bit 6
	G5			15	GREEN digital input data; bit 5
	G4			16	GREEN digital input data; bit 4
	G3			17	GREEN digital input data; bit 3
	G2			18	GREEN digital input data; bit 2
	G1			19	GREEN digital input data; bit 1
	G0			20	GREEN digital input data; bit 0 (LSB)
	CLKR			21	RED clock input
	CLKG			22	GREEN clock input
	CLKB			23	BLUE clock input
	B7			24	BLUE digital input data; bit 7 (MSB)
	B6			25	BLUE digital input data; bit 6
	B5			26	BLUE digital input data; bit 5
	B4			27	BLUE digital input data; bit 4
	B3			28	BLUE digital input data; bit 3
	B2			29	BLUE digital input data; bit 2
	B1			30	BLUE digital input data; bit 1
	B0			31	BLUE digital input data; bit 0 (LSB)
	VDDD2			32	digital supply voltage 2
	VSSD2			33	digital supply ground 2
	VREF			34	decoupling input for reference voltage
	VDDA1			35	analog supply voltage 1
	OUTB			36	BLUE analog output
	VSSA1			37	analog supply ground 1
	IREFA			38	reference current input for internal reference
	VDDA2			39	analog supply voltage 2
	OUTG			40	GREEN analog output

1995 Mar 09

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