Intersil Corporation HI1178 Datasheet
March 1998
HI1178
Triple 8-Bit, 40 MSPS, RGB,
3-Channel D/A Converter
Features
• Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . .Triple 8-Bit
• Maximum Conversion Speed . . . . . . . . . . . . . . . 40MHz
• RGB 3-Channel Input/Output
• Differential Linearity Error . . . . . . . . . . . . . . . +0.3 LSB
• Low Power Consumption . . . . . . . . . . . . . . . . . .240mW
(200Ω Load for 2V
P-P
Output)
• Single Power Supply . . . . . . . . . . . . . . . . . . . . . . . . .+5V
• Low Glitch Noise
• Direct Replacement for Sony CXD1178
Applications
• Digital TV
• Graphics Display
• High Resolution Color Graphics
• Video Reconstruction
• Instrumentation
• Image Processing
• I/Q Modulation
Description
The HI1178 is a triple 8-bit, high-speed, CMOS D/A
converter designed for video band use. It has three separate, 8-bit, pixel inputs, one each for red, green, and blue
video data. A single 5.0V power supply and pixel clock input
is all that is required to make the device operational. A bias
voltage generator is internal. Each channel clock input can
be controlled individually, or connected together as one. The
HI1178 also has BLANK video control signal. Refer to the
HI2304 for 3.3V operation.
Ordering Information
PART
NUMBER
HI1178JCQ -40 to 85 48 Ld MQFP Q48.12x12-S
TEMP.
RANGE (oC) PACKAGE PKG. NO.
Pinout
R0
R1
R2
R3
R4
R5
R6
R7
G0
G1
G2
G3
DD
DVDDAV
DV
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16
G5
G4
DD
G6
HI1178
(MQFP)
TOP VIEW
DD
AVDDAV
B0
G7
B1
AV
DD
VG
B2
BO
B3
BO
B4
B5
GO
GO
B6
RO
373839404142434445464748
36
35
34
33
32
31
30
29
28
27
26
25
2423222120191817
B7
RO
I
REF
V
REF
AV
VB
DV
DV
BCK
GCK
RCK
CE
BLK
SS
SS
SS
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
| Copyright © Intersil Corporation 1999
10-1100
File Number 4115.2
Functional Block Diagram
HI1178
(LSB) R0
R1
R2
R3
R4
R5
R6
R7
(LSB) G0
G1
G2
G3
G4
G5
G6
G7
(LSB) B0
B1
B2
B3
B4
B5
B6
B7
BLK
1
2
3
4
DECODER
5
6
7
DECODER
8
9
10
11
12
DECODER
13
14
15
DECODER
16
17
18
19
20
DECODER
21
22
23
DECODER
24
25
LATCHES
LATCHES
LATCHES
2 LSBs
CURRENT
CELLS
6 MSBs
CURRENT
CELLS
CLOCK
GENERATOR
2 LSBs
CURRENT
CELLS
6 MSBs
CURRENT
CELLS
CLOCK
GENERATOR
2 LSBs
CURRENT
CELLS
6 MSBs
CURRENT
CELLS
CLOCK
GENERATOR
CURRENT CELLS
(FOR FULL SCALE)
-
+
DV
47
DD
48
DV
DD
36
R0
37
R0
27
RCK
43
AV
SS
44
AV
DD
45
AV
DD
46
AV
DD
38
G0
39
G0
28
GCK
33
AV
SS
30
DV
SS
31
DV
SS
B0
40
41
B0
29
BCK
42
V
G
34
V
REF
35
I
REF
CE
26
BIAS VOLTAGE
GENERATOR
32
V
B
10-1101
HI1178
Pin Descriptions
PIN NO. SYMBOL EQUIVALENT CIRCUIT DESCRIPTION
1 to 8 R0 to R7 Digital input.
9 to 16 G0 to G7
1
DV
DD
17 to 24 B0 to B7
24
DV
SS
25 BLK Blanking pin. No signal at “H” (Output
25
32 V
B
DV
32
DD
DV
DV
DD
SS
DV
DD
0V). Output condition at “L”.
Connect a capacitor of about 0.1µF.
+
-
DV
SS
27 RCK Clock pin. Moreover all input pins are
28 CLK
29 BCK
30, 31 DV
33 AV
SS
SS
27
28
29
26 CE Chip enable pin. No signal (Output 0V) at
26
DV
DV
DV
DV
DD
SS
DD
SS
TTL-CMOS compatible.
Digital GND.
Analog GND.
“H” and minimizes power consumption.
10-1102
HI1178
Pin Descriptions
(Continued)
PIN NO. SYMBOL EQUIVALENT CIRCUIT DESCRIPTION
35 I
34 V
42 V
REF
REF
G
AV
DD
AV
DD
35
AV
DD
+
Connect a resistance 16 times “16R”
that of output resistance value “R”.
Set full scale output value.
Connect a capacitor of about 0.1µF.
-
AV
SS
42
43 to 46 AV
DD
34
AV
SS
37 RO Current output pin. Voltage output can
AV
39 GO
41 BO
36 RO Inverted current output pin. Normally
38 GO
40 BO
DD
37
39
41
AV
SS
AV
DD
AV
AV
DD
SS
Analog VDD.
be obtained by connecting a
resistance.
dropped to analog GND.
47, 48 DV
DD
36
38
40
AV
SS
Digital VDD.
10-1103
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