Sony CXD1177Q Datasheet
—1—
E90602F01
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage AVDD, DVDD 7V
•Input voltage (All pins)
VIN VDD +0.5 to VSS –0.5 V
• Output current (Every each channel)
IOUT 0 to 15 mA
• Storage temperature
Tstg –55 to +150 °C
Recommended Operating Conditions
• Supply voltage AVDD, AVSS 4.75 to 5.25 V
DVDD, DVSS 4.75 to 5.25 V
• Reference input voltage
VREF 2.0 V
• Clock pulse width
TPW1, TPW0 11.2 ns (min.) to 1.1 µs (max.)
• Operating temperature
Topr –40 to +85 °C
Description
The CXD1177Q is an 8-bit high-speed D/A
converter for video band use. It has an input/output
equivalent to 2 channels of Y and C. It is suitable
for use of digital TV, graphic display, and others.
Features
• Resolution 8-bit
• Maximum conversion speed 40MSPS
• YC 2-channel input/output
• Differential linearity error ±0.3 LSB
• Low power consumption 160 mW
(200 Ω load at 2 Vp-p output)
• Single 5 V power supply
• Low glitch noise
• Stand-by function
Structure
Silicon gate CMOS IC
8-bit 40MSPS YC 2-channel D/A Converter
32 pin QFP (Plastic)
CXD1177Q
—2—
CXD1177Q
Block Diagram
Pin Configuration
2LSB'S
CURRENT
CELLS
6MSB'S
CURRENT
CELLS
CLOCK
GENERATOR
LATCHESDECODER
31
32
19
20
21
23
24
25
26
27
28
29
30
2LSB'S
CURRENT
CELLS
6MSB'S
CURRENT
CELLS
CLOCK
GENERATOR
LATCHESDECODER
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
CURRENT CELLS
(FOR FULL SCALE)
BIAS VOLTAGE
GENERATOR
DECODER
DECODER
22
DVDD
AVDD
YO
YO
YCK
AV
SS
DVSS
CO
CO
CCK
VG
VREF
IREF
VB
(LSB) Y0
Y1
Y2
Y3
Y4
Y5
Y6
(MSB) Y7
(LSB) C0
C1
C2
C3
C4
C5
C6
(MSB) C7
BLK
CE
17
18
19
20
21
22
23
24
9
10
11
12
13
14
15
16
2
3
4
5
6
7
8
1
26
27
28
29
30
31
32
25
C7
C6
C5
C4
C3
C2
C1
C0
VREF
CO
CO
YO
YO
VG
AV
DD
DVDD
IREF
AVss
VB
DVss
CCK
YCK
CE
BLK
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
—3—
CXD1177Q
Pin Description and I/O Pins Equivalent Circuit
1 to 8
9 to 16
17
22
19
20
21
23
18
Y0 to Y7
C0 to C7
BLK
VB
YCK
CCK
DVSS
AVSS
CE
I
I
O
I
—
—
I
Pin No. Symbol I/O Equivalent circuit Description
1
DVDD
DVSS
to
16
DVDD
DVSS
17
DVDD
DVSS
DVDD
22
DVDD
DVSS
19
20
DVDD
DVSS
18
Digital input
Y0 (LSB) to Y7 (MSB)
C0 (LSB) to C7(MSB)
Blanking input.
This is synchronized with the clock input signal
for each channel.
No signal at “H” (Output 0 V).
Output condition at “L”.
Connect a capacitor of about 0.1 µF.
Clock input.
Digital ground
Analog ground
Chip enable input.
This is not synchronized with the clock input
signal.
No signal (Output 0 V) at “H” and
minimizes power consumption.
—4—
CXD1177Q
24
25
30
31
27
29
26
28
32
IREF
VREF
VG
AVDD
CO
YO
CO
YO
DVDD
O
I
O
—
O
—
Pin No. Symbol I/O Equivalent circuit Description
AVSS
AVSS
AVDD
AVDD
AVSS
AVDD
24
25
30
AV
DD
AVDD
AVSS
AVDD
AVSS
26
27
28
29
Connect a resistance 16 times “RIR” that of
output resistance value “ROUT”.
Set full-scale output value.
Connect a capacitor of about 0.1 µF.
Analog power supply
Current output.
Voltage output can be obtained by connecting
a resistance.
Inverted current output.
Normally dropped to analog ground.
Digital power supply
Loading...