INTEGRATED CIRCUITS
DATA SHEET
TDA8777
Triple 10-bit video DAC
up to 330 Msps
Objective specification
2004 Jan 08
Philips Semiconductors
Objective specification
Triple 10-bit video DAC
up to 330 Msps
FEATURES
•
Triple 10-bit DAC
•
Sampling rate up to 330 Msps
•
Internal voltage reference (1.21 V)
•
Complementary output
•
Direct drive of double terminated 75
Ω
load into
standard level
•
TTL compatible input
•
Sync and blank control inputs
•
Analog output current source
•
Power-down mode
•
3.3 V power supply
•
LQFP48 package.
APPLICATIONS
•
PC video cards
•
High resolution image processing
•
Digital video systems
•
General purpose high speed digital-to-analog
conversion.
QUICK REFERENCE DATA
SYMBOL
V
DDA
I
DDA
INL
DNL
f
clk(max)
P
tot
P
pd
PARAMETER
analog supply voltage
analog supply current
integral non-linearity
differential non-linearity
maximum clock frequency
total power dissipation
power-down mode dissipation
−
−2
−1
330
−
−
MIN.
3.0
TYP.
3.3
120
−
−
−
396
6
−
+2
+1
−
−
−
GENERAL DESCRIPTION
TDA8777
The TDA8777 consists of three separate 10-bit video
Digital-to-Analog Converters (DACs) with complementary
outputs. They convert the digital input signals into analog
current outputs at a maximum conversion rate of 330 MHz.
The DACs are based on current source architecture.
A sync pulse can be added to the green signal
(Sync-On-Green) to allow devices driven by the video
DAC to be synchronized.
The TDA8777 has a Power-down mode to reduce power
consumption during inactive periods.
The TDA8777 is fabricated in a CMOS process that
ensures high functionality with low power dissipation.
MAX.
3.6
V
UNIT
mA
LSB
LSB
MHz
mW
mW
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
TDA8777HL/14
TDA8777HL/24
TDA8777HL/33
LQFP48
DESCRIPTION
plastic low profile quad flat package; 48 leads;
body 7
×
7
×
1.4 mm
VERSION
SOT313-2
SAMPLING
FREQUENCY
(MHz)
140
240
330
2004 Jan 08
2
Philips Semiconductors
Objective specification
Triple 10-bit video DAC
up to 330 Msps
BLOCK DIAGRAM
TDA8777
V
SSA2
V
SSA1
PSAVE
RSET
COMP
V
DDA3
V
DDA2
V
DDA1
48-39
red digital
inputs
(bits R0 to R9)
10-1
30
29
13
POR
26
25
38
37
35
36
TDA8777
10
CURRENT/VOLTAGE REFERENCE
Vref + Iref
I
ref
34
10-BIT DAC
Vref + Iref
33
VREF
10
10
OUTR
OUTR
green digital
inputs
(bits G0 to G9)
10
TRIPLE
MULTI-
PLEXER
10
BLANKING 10
INSERT
32
10-BIT DAC
SYNC
INSERT
31
OUTG
OUTG
Vref + Iref
23-14
blue digital
inputs
(bits B0 to B9)
10
10
10
10-BIT DAC
sync
DAC CONTROL MODULE
24
CLK
11
BLANK
12
SYNC
28
27
OUTB
OUTB
mle290
Fig.1 Block diagram.
2004 Jan 08
3
Philips Semiconductors
Objective specification
Triple 10-bit video DAC
up to 330 Msps
PINNING
SYMBOL
G0
G1
G2
G3
G4
G5
G6
G7
G8
G9
BLANK
SYNC
V
DDA1
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
CLK
V
SSA1
V
SSA2
OUTB
OUTB
V
DDA2
V
DDA3
OUTG
OUTG
OUTR
OUTR
COMP
VREF
RSET
PSAVE
R0
R1
2004 Jan 08
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
green digital input data; bit 0 (LSB)
green digital input data; bit 1
green digital input data; bit 2
green digital input data; bit 3
green digital input data; bit 4
green digital input data; bit 5
green digital input data; bit 6
green digital input data; bit 7
green digital input data; bit 8
green digital input data; bit 9 (MSB)
composite blank control input (active LOW)
composite sync control input; for green channel only (active LOW)
analog supply voltage 1
blue digital input data; bit 0 (LSB)
blue digital input data; bit 1
blue digital input data; bit 2
blue digital input data; bit 3
blue digital input data; bit 4
blue digital input data; bit 5
blue digital input data; bit 6
blue digital input data; bit 7
blue digital input data; bit 8
blue digital input data; bit 9 (MSB)
clock input
analog supply ground 1
analog supply ground 2
complementary blue current analog output
blue current analog output
analog supply voltage 2
analog supply voltage 3
complementary green current analog output
green current analog output
complementary red current analog output
red current analog output
compliance voltage output
voltage reference input
full-scale current control resistor pin
power-save control input (active LOW)
red digital input data; bit 0 (LSB)
red digital input data; bit 1
4
DESCRIPTION
TDA8777
Philips Semiconductors
Objective specification
Triple 10-bit video DAC
up to 330 Msps
SYMBOL
R2
R3
R4
R5
R6
R7
R8
R9
PIN
41
42
43
44
45
46
47
48
red digital input data; bit 2
red digital input data; bit 3
red digital input data; bit 4
red digital input data; bit 5
red digital input data; bit 6
red digital input data; bit 7
red digital input data; bit 8
red digital input data; bit 9 (MSB)
DESCRIPTION
TDA8777
G0
G1
G2
G3
G4
G5
G6
G7
G8
1
2
3
4
5
6
37 RSET
handbook, full pagewidth
38 PSAVE
48 R9
47 R8
46 R7
45 R6
44 R5
43 R4
42 R3
41 R2
40 R1
39 R0
36 VREF
35 COMP
34 OUTR
33 OUTR
32 OUTG
31 OUTG
TDA8777
7
8
9
30 VDDA3
29 VDDA2
28 OUTB
27 OUTB
26 VSSA2
25 VSSA1
G9 10
BLANK 11
SYNC 12
VDDA1 13
B0 14
B1 15
B2 16
B3 17
B4 18
B5 19
B6 20
B7 21
B8 22
B9 23
CLK 24
MLE289
Fig.2 Pin configuration.
2004 Jan 08
5
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