Philips tda8772 DATASHEETS
INTEGRATED CIRCUITS
DATA SH EET
TDA8772; TDA8772A
Triple 8-bit video digital-to-analog
converter
Product specification
Supersedes data of May 1994
File under Integrated Circuits, IC02
Philips Semiconductors
1995 Mar 09
Philips Semiconductors Product specification
Triple 8-bit video digital-to-analog
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
channel only while TDA8772 has it on the 3 channels
• Single 5 V power supply
• 44-pin QFP package.
BLANK control input on the GREEN
TDA8772; TDA8772A
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.
APPLICATIONS
• General purpose high-speed digital-to-analog
conversion
• Digital TV
• Graphic display
• Desktop video processing.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
PINS PIN POSITION MATERIAL CODE
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
SAMPLING
FREQUENCY
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
V
DDA
V
DDD
I
DDA
I
DDD
INL integral non-linearity2 f
DNL differential non-linearity f
f
clk(max)
P
tot
analog supply voltage 4.5 5.0 5.5 V
digital supply voltage 4.5 5.0 5.5 V
analog supply current RL=75Ω; note 1 40 65 100 mA
digital supply current
TDA8772H/3, TDA8772AH/3 − 716mA
TDA8772H/8, TDA8772AH/8 − 16 27 mA
= 35 MHz; ramp input −±0.5 ±1 LSB
clk
f
= 85 MHz; ramp input −±0.75 ±1.2 LSB
clk
= 35 MHz; ramp input −±0.25 ±0.5 LSB
clk
= 85 MHz; ramp input - ±0.5 ±0.75 LSB
f
clk
maximum clock frequency
TDA8772H/3, TDA8772AH/3 35 −−MHz
TDA8772H/8, TDA8772AH/8 85 −−MHz
total power dissipation note 1
TDA8772H/3, TDA8772AH/3 R
TDA8772H/8, TDA8772AH/8 R
=75Ω; f
L
=75Ω; f
L
= 35 MHz 180 360 640 mW
clk
= 85 MHz 180 405 700 mW
clk
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
converter
BLOCK DIAGRAMS
handbook, full pagewidth
RED
digital inputs
(bits R0 to R3)
RED
digital inputs
(bits R4 to R7)
GREEN
digital inputs
(bits G0 to G3)
4
8–5
TDA8772
4
4–1
4
20–17
4
V
DDA DDD
MSB
DECODER
V
4
LSB
DECODER
RESISTOR
STRING
4
TDA8772; TDA8772A
10,3235,39,43
41
21
44
reference
current input
(I )
REFB
RED
clock input
RED
analog output
GREEN
digital inputs
(bits G4 to G7)
BLUE
digital inputs
(bits B0 to B3)
BLUE
digital inputs
(bits B4 to B7)
BLANK
control input
SYNC
control input
4
4
16–13
31–284
27–24
12
11
4
4
CONTROL
REGISTER
MSB
DECODER
MSB
DECODER
LSB
DECODER
RESISTOR
STRING
4
LSB
DECODER
RESISTOR
STRING
BANDGAP
REFERENCE
34
37,42 9,33
22
40
23
36
38
GREEN
clock input
GREEN
analog output
BLUE
clock input
BLUE
analog output
reference current
input for internal
reference
(I )
REFA
1995 Mar 09 4
reference voltage
decoupling input
(V )
REF
V
SSA SSD
Fig.1 Block diagram for TDA8772.
V
MBB661 - 2
Philips Semiconductors Product specification
Triple 8-bit video digital-to-analog
converter
handbook, full pagewidth
RED
digital inputs
(bits R0 to R3)
RED
digital inputs
(bits R4 to R7)
GREEN
digital inputs
(bits G0 to G3)
4
4
4
8–5
TDA8772A
4–1
20–17
4
MSB
DECODER
V
DDA DDD
V
4
LSB
DECODER
RESISTOR
STRING
4
LSB
DECODER
TDA8772; TDA8772A
10,3235,39,43
41
21
44
22
reference
current input
(I )
REFB
RED
clock input
RED
analog output
GREEN
clock input
GREEN
digital inputs
(bits G4 to G7)
BLUE
digital inputs
(bits B0 to B3)
BLUE
digital inputs
(bits B4 to B7)
BLANK
control input
SYNC
control input
4
4
16–13
31–284
27–24
12
11
4
4
CONTROL
REGISTER
MSB
DECODER
MSB
DECODER
RESISTOR
STRING
4
LSB
DECODER
RESISTOR
STRING
BANDGAP
REFERENCE
34
reference voltage
decoupling input
(V )
REF
37,42 9,33
V
V
SSA SSD
40
23
36
38
GREEN
analog output
BLUE
clock input
BLUE
analog output
reference current
input for internal
reference
(I )
REFA
MLB724
1995 Mar 09 5
Fig.2 Block diagram for TDA8772A.
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)
V
SSD1
V
DDD1
SYNC 11 composite sync control input; for GREEN channel only (active LOW)
BLANK 12 composite blank control input (active LOW)
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)
V
DDD2
V
SSD2
V
REF
V
DDA1
OUTB 36 BLUE analog output
V
SSA1
I
REFA
V
DDA2
OUTG 40 GREEN analog output
9 digital supply ground 1
10 digital supply voltage 1
32 digital supply voltage 2
33 digital supply ground 2
34 decoupling input for reference voltage
35 analog supply voltage 1
37 analog supply ground 1
38 reference current input for internal reference
39 analog supply voltage 2
1995 Mar 09 6
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