CXD2306Q
10-bit 80MSPS 1ch D/A Converter
Description
The CXD2306Q is a 1-ch 10-bit 80MSPS D/A
converter for fine monitor and video, and is ideal for
high definition TVs and high resolution displays.
Features
• 10-bit resolution
• Maximum conversion rate
• Differential linearity error
80MSPS
±0.5 LSB
Absolute Maximum Ratings
(Ta=25 °C)
•
Supply voltage
AV
DD,
DV
DD
7
V
• Input voltage (All pins)
V
IN
V
DD
+ 0.5 to V
SS
– 0.5 V
• Output voltage
I
OUT
• Storage temperature
Tstg
0 to 15
–55 to +150
mA
°C
32 pin QFP (Plastic)
• Low power consumption
150 mW(max.)
(When 80MSPS 200
Ω
load, 2 Vp-p is output)
• Single 5 V power supply
• Built-in independent constant-voltage source
• Stand-by function
Structure
Silicon gate CMOS IC
Recommended Operating Conditions
• Supply voltage
AV
DD
, AV
SS
5.0 ± 0.25
DV
DD
, DV
SS
5.0 ± 0.25
• Reference input voltage
V
REF
0.5 to 2.0
• Clock pulse width
t
PW1
, t
PW0
5.6 (min.)
• Operating temperature
topr
–20 to +85
V
V
V
ns
°C
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.
—1—
E92X12D01
CXD2306Q
Block Diagram and Pin Configuration
(LSB) D0 30
D1 31
D2 32
D3
D4
1
2
DECODER
LACHES
6MSB'S
CURRENT
CELLS
DECODER
19 VREF
CURRENT CELLS
(FOR FULL SCALE)
CLOCK
GENERATOR
17 IREF
21 AV
DD
BIAS VOLTAGE
GENERATOR
BAND GAP
REFERENCE
20 AV
DD
18 SREF
4LSB'S
CURRENT
CELLS
24 IO
25 AV
SS
23 IO
22 VG
D5 3
D6 4
D7
(MSB) D9
5
7
D8 6
DV
DD
28
BLK 10
DV
DD
13
DV
SS
15
DV
SS
27
CLK
9
VB 14
CE 11
Pin Configuration
VREF
SREF
18
AV
DD
AV
DD
IO
24
23
22
21
20
19
17
IREF
VG
IO
AVss 25
NC 26
DVss 27
DV
DD
28
NC 29
D0 (LSB) 30
D1 31
D2 32
16 NC
15 DVss
14 VB
13 DV
DD
12 NC
11 CE
10 BLK
9 CLK
1
2
3
4
5
6
7
8
D6
D9 (MSB)
D3
D5
D8
27 to
17 to
15
25
Digital section
Analog section
—2—
NC
D4
D7
CXD2306Q
Pin Description and Equivalent Circuit
Pin No.
Symbol
I/O
Equivalent circuit
Description
DV
DD
30 to 32
1 to 7
30
D0 to D9
I
to
7
DV
SS
Digital input.
30 pin D0 (LSB) to 7 pin D9 (MSB)
8, 12,16, 26, 29
9
NC
CLK
—
NC pin
Clock input
Blanking input.
This is synchronized with the clock
input signal.
No signal (0 V output) at high and
output state at low.
Chip enable input.
This is not synchronized with the clock
input signal.
No signal (0 V output) at high makes
power consumption minimum.
Digital power supply
DV
DD
DV
DD
10
BLK
I
9
10
11
DV
SS
11
CE
13, 28
DV
DD
—
DV
DD
14
VB
O
14
Connect a capacitor of approximately
0.1 µF.
DV
SS
15, 27
DV
SS
—
AV
DD
AV
DD
Digital ground
Reference current output.
Connect resistance “R
IR
” which is 16
times output resistance “R”.
17
IREF
O
AV
DD
17
AV
SS
AV
DD
19
VREF
I
19
22
Reference voltage input.
Sets output full scale value.
Connect a capacitor of approximately
0.1 µF.
AV
SS
22
VG
O
AV
SS
—3—
CXD2306Q
Pin No.
Symbol
I/O
Equivalent circuit
AV
DD
Description
Independent constant-voltage source
output pin using band gap reference.
Stable voltage independent of the
fluctuation for supply voltage can be
get by connecting to V
REF
. See
Application Circuit 2 for details.
18
18
SREF
O
AV
SS
AV
SS
20, 21
AV
DD
—
AV
DD
Analog power supply
23
IO
24
Inverted current output.
Connect to GND normally.
AV
SS
AV
DD
O
23
24
IO
Current output. Output can be
retrieved by connecting resistance.
The standard is 200
Ω.
AV
SS
25
AV
SS
—
Analog ground
Description of Operation
Timing Chart
t
PW1
t
PW0
CLK
ts th
ts th
ts th
1.5V
I/O Correspondence Table
(When 2.00 V output full-scale voltage)
Input code
MSB
LSB
1 1 1 1 1 1 1 1 1 1
:
1 0 0 0 0 0 0 0 0 0
:
0 0 0 0 0 0 0 0 0 0
100%
Output
voltage
2.0 V
1.0 V
0V
DATA
t
PD
D/A OUT
50%
t
PD
t
PD
0%
—4—
CXD2306Q
Electrical Characteristics
Item
Resolution
Conversion speed
Integral non-linearity error
Differential non-linearity error
Precision guaranteed
output voltage range
Output full-scale voltage
Output full-scale current
Output offset voltage
Glitch energy
Differential gain
Differential phase
Supply current
Analog input resistance
Input capacitance
Output capacitance
Digital input voltage
Digital input current
SREF output voltage
Setup time
Hold time
Propagation delay time
CE enable time
∗
1
CE disable time
∗
1
(F
CLK
=80 MHz, AV
DD
=DV
DD
=5 V, R
OUT
=200
Ω,
V
REF
=2.0 V, R
IR
=3.3 kΩ, Ta=25 °C)
Symbol
n
F
CLK
E
L
E
D
V
OC
V
FS
I
FS
V
OS
GE
DG
DP
I
DD
I
STB
R
IN
C
I
C
o
V
IH
V
IL
I
IH
I
IL
V
SR
ts
th
t
PD
t
E
t
D
When D0 to D9= “0000000000” input
Measurement conditions
AV
DD
=DV
DD
=4.75 to 5.25 V
Ta=–20 to +85 °C
Endpoint
Min.
Typ.
10
Max.
Unit
bit
MSPS
LSB
LSB
V
V
mA
mV
pV•s
%
deg
0
–2.0
–0.5
1.8
1.8
9.0
1.92
1.92
9.6
50
2.5
1.3
80
2.0
0.5
2.0
2.0
10
1
R
OUT
=100
Ω,
1 Vp-p output
CE=L
CE=H
VREF
IO
AV
DD
=DV
DD
=4.75 to 5.25 V
Ta=–20 to +75 °C
AV
DD
=DV
DD
=4.75 to 5.25 V
Ta=–20 to +75 °C
1
30
1
9
50
2.15
0.85
–5
1.0
5.0
1.0
5
1.3
mA
MΩ
pF
pF
V
µA
V
ns
ns
ns
ms
ms
CE=H→L
CE=L→H
10
1
1
2
2
∗
1
When the external capacitor for the VG pin is 0.1 µF.
Electrical Characteristics Measurement Circuit
Analog Input Resistance
Digital Input Current
}
Measurement Circuit
+5.25V
AV
DD
, DV
DD
A
CXD2306Q
V
AV
SS
, DV
SS
—5—
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