Philips TDA8771AH-C1-R2, TDA8771AH-C1-R1, TDA8771AH-C1 Datasheet
DATA SH EET
Product specification
File under Integrated Circuits, IC02
1996 Jan 25
INTEGRATED CIRCUITS
TDA8771A
Triple 8-bit video Digital-to-Analog
Converter (DAC)
1996 Jan 25 2
Philips Semiconductors Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
TDA8771A
FEATURES
• 8-bit resolution
• Sampling rate up to 35 MHz
• Internal reference voltage regulator
• No deglitching circuit required
• Large output voltage range
• 1kΩ output load
• Power dissipation only 200 mW
• 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.
GENERAL DESCRIPTION
The TDA8771A is a triple 8-bit video Digital-to-Analog
Converter (DAC). It converts the digital input signals into
analog voltage outputs at a maximum conversion rate of
35 MHz.
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 device is fabricated in a 5 V, CMOS process that
ensures high functionality with low power dissipation.
QUICK REFERENCE DATA
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.
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 RL=1kΩ; note 1 10 33 45 mA
I
DDD
digital supply current f
clk
= 35 MHz − 720mA
INL integral non-linearity f
clk
= 35 MHz; ramp input −±0.5 ±1 LSB
DNL differential non-linearity f
clk
= 35 MHz; ramp input −±0.25 ±0.5 LSB
f
clk(max)
maximum clock frequency 35 −−MHz
P
tot
total power dissipation RL=1kΩ; f
clk
= 35 MHz; note 1 45 200 360 mW
TYPE
NUMBER
P ACKAGE
NAME DESCRIPTION VERSION
TDA8771AH QFP44 plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm
SOT307-2
1996 Jan 25 3
Philips Semiconductors Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
TDA8771A
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
MBH039
RESISTOR
STRING
MSB
DECODER
LSB
DECODER
4
4
31
RESISTOR
STRING
MSB
DECODER
LSB
DECODER
4
4
RESISTOR
STRING
MSB
DECODER
LSB
DECODER
4
4
30,29
26,25
4
24 to 21
4
BANDGAP
REFERENCE
16 to 13
4
20 to 17
4
5 to 3
4
12 to 9
4
8
34, 37, 38,41 33
36
2,42 6,28
40
44
1
clock input
7,2732,35,39,43
V
DDA DDD
V
reference
current input
RED
analog output
GREEN
analog output
BLUE
analog output
V
SSA SSD
V
reference voltage
decoupling input
not
connected
BLUE
digital inputs
(bits B4 to B7)
BLUE
digital inputs
(bits B0 to B3)
GREEN
digital inputs
(bits G4 to G7)
GREEN
digital inputs
(bits G0 to G3)
RED
digital inputs
(bits R4 to R7)
RED
digital inputs
(bits R0 to R3)
TDA8771A
(I )
REF
(V )
REF
1996 Jan 25 4
Philips Semiconductors Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
TDA8771A
PINNING
SYMBOL PIN DESCRIPTION
I
REF
1 reference current input for output buffers
V
SSA1
2 analog supply ground 1
R7 3 RED digital input data; bit 7 (MSB)
R6 4 RED digital input data; bit 6
R5 5 RED digital input data; bit 5
V
SSD1
6 digital supply ground 1
V
DDD1
7 digital supply voltage 1
R4 8 RED digital input data; bit 4
R3 9 RED digital input data; bit 3
R2 10 RED digital input data; bit 2
R1 11 RED digital input data; bit 1
R0 12 RED digital input data; bit 0 (LSB)
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)
B7 21 BLUE digital input data; bit 7 (MSB)
B6 22 BLUE digital input data; bit 6
B5 23 BLUE digital input data; bit 5
B4 24 BLUE digital input data; bit 4
B3 25 BLUE digital input data; bit 3
B2 26 BLUE digital input data; bit 2
V
DDD2
27 digital supply voltage 2
V
SSD2
28 digital supply ground 2
B1 29 BLUE digital input data; bit 1
B0 30 BLUE digital input data; bit 0 (LSB)
CLK 31 clock input
V
DDA1
32 analog supply voltage 1
V
REF
33 decoupling input for reference voltage
n.c. 34 not connected
V
DDA2
35 analog supply voltage 2
OUTB 36 BLUE analog output
n.c. 37 not connected
n.c. 38 not connected
V
DDA3
39 analog supply voltage 3
OUTG 40 GREEN analog output
1996 Jan 25 5
Philips Semiconductors Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
TDA8771A
n.c. 41 not connected
V
SSA2
42 analog supply ground 2
V
DDA4
43 analog supply voltage 4
OUTR 44 RED analog output
SYMBOL PIN DESCRIPTION
Fig.2 Pin configuration.
handbook, full pagewidth
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
index
corner
TDA8771A
I
REF
V
SSA1
R7
R6
R5
R4
R3
R2
R1
B6
R0
G7
G6
G5
G4G3G2G1G0
B7
V
SSD2
V
REF
CLK
V
DDA1
V
DDD2
B2
B3
B4
V
DDA2
V
DDA4
V
DDA3
OUTR
n.c.
OUTG
V
SSA2
MBH040
V
SSD1
V
DDD1
B1
B0
B5
n.c.
n.c.
n.c.
OUTB
1996 Jan 25 6
Philips Semiconductors Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
TDA8771A
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC134).
THERMAL CHARACTERISTICS
HANDLING
Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling integrated circuits.
SYMBOL PARAMETER MIN. MAX. UNIT
V
DDA
analog supply voltage −0.5 +6.5 V
V
DDD
digital supply voltage −0.5 +6.5 V
∆V
DD
supply voltage difference between V
DDA
and V
DDD
−1.0 +1.0 V
T
stg
storage temperature −55 +150 °C
T
amb
operating ambient temperature 0 +70 °C
T
j
junction temperature − +125 °C
SYMBOL PARAMETER VALUE UNIT
R
th j-a
thermal resistance from junction to ambient in free air 75 K/W
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