Philips Semiconductors
Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
FEATURES
•
8-bit resolution
•
Sampling rate up to 35 MHz
•
Internal reference voltage regulator
•
No deglitching circuit required
•
Large output voltage range
•
1 kΩ output load
•
Power dissipation only 200 mW
•
Single 5 V power supply
•
44-pin QFP package
•
Operating ambient temperature from
−40
to +85
°C.
APPLICATIONS
•
General purpose high-speed digital-to-analog
conversion
•
Digital TV
•
Graphic display
•
Desktop video processing.
QUICK REFERENCE DATA
SYMBOL
V
DDA
V
DDD
I
DDA
I
DDD
T
amb
INL
DNL
f
clk(max)
P
tot
Note
PARAMETER
analog supply voltage
digital supply voltage
analog supply current
digital supply current
operating ambient
temperature
integral non-linearity
differential non-linearity
maximum clock frequency
total power dissipation
R
L
= 1 kΩ; f
clk
= 35 MHz; note 1
f
clk
= 35 MHz; ramp input
f
clk
= 35 MHz; ramp input
R
L
= 1 kΩ; note 1
f
clk
= 35 MHz
CONDITIONS
MIN.
4.5
4.5
10
−
−40
−
−
35
45
GENERAL DESCRIPTION
TDF8771A
The TDF8771A 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.
TYP.
5.0
5.0
30
3
−
±0.3
±0.15
−
200
MAX.
5.5
5.5
45
10
+85
±1
±0.5
−
360
UNIT
V
V
mA
mA
°C
LSB
LSB
MHz
mW
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
TYPE
NUMBER
TDF8771AH
PACKAGE
NAME
QFP44
DESCRIPTION
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10
×
10
×
1.75 mm
VERSION
SOT307-2
2003 Apr 29
2
Philips Semiconductors
Product specification
Triple 8-bit video Digital-to-Analog
Converter (DAC)
PINNING
SYMBOL
IREF
V
SSA1
R7
R6
R5
V
SSD1
V
DDD1
R4
R3
R2
R1
R0
G7
G6
G5
G4
G3
G2
G1
G0
B7
B6
B5
B4
B3
B2
V
DDD2
V
SSD2
B1
B0
CLK
V
DDA1
VREF
n.c.
V
DDA2
OUTB
n.c.
n.c.
V
DDA3
OUTG
2003 Apr 29
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
analog supply ground 1
RED digital input data; bit 7 (MSB)
RED digital input data; bit 6
RED digital input data; bit 5
digital supply ground 1
digital supply voltage 1
RED digital input data; bit 4
RED digital input data; bit 3
RED digital input data; bit 2
RED digital input data; bit 1
RED digital input data; bit 0 (LSB)
GREEN digital input data; bit 7 (MSB)
GREEN digital input data; bit 6
GREEN digital input data; bit 5
GREEN digital input data; bit 4
GREEN digital input data; bit 3
GREEN digital input data; bit 2
GREEN digital input data; bit 1
GREEN digital input data; bit 0 (LSB)
BLUE digital input data; bit 7 (MSB)
BLUE digital input data; bit 6
BLUE digital input data; bit 5
BLUE digital input data; bit 4
BLUE digital input data; bit 3
BLUE digital input data; bit 2
digital supply voltage 2
digital supply ground 2
BLUE digital input data; bit 1
BLUE digital input data; bit 0 (LSB)
clock input
analog supply voltage 1
decoupling input for reference voltage
not connected
analog supply voltage 2
BLUE analog output
not connected
not connected
analog supply voltage 3
GREEN analog output
4
DESCRIPTION
reference current input for output buffers
TDF8771A
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