--1--

E94341B01

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

, DV

· Input voltage (All pins)

+0.5 to V

0.5

· Output current

OUT

0 to 15

· Storage temperature

Tstg

55 to +150

°C

Recommended Operating Conditions

· Supply voltage

, AV

4.75 to 5.25

, DV

4.75 to 5.25

· Reference input voltage

REF

0.5 to 2.0

· Clock pulse width

1, T

9 (min.)

· Operating temperature

Topr

20 to +85

°C

Description

The CXD2309Q is a 10-bit high-speed D/A

converter for video band, featuring RGB 3-channel

input/output. This is ideal for use in high-definition

TVs and high-resolution displays.

Features

· Resolution 10-bit

· Maximum conversion speed 85MSPS

· RGB 3-channel input/output

· Differential linearity error ±0.5 LSB

· Low power consumption 275 mW

(200

load for 2 Vp-p output)

· Single +5 V power supply

· Low glitch

· 48-pin QFP package

Structure

Silicon gate CMOS IC

10-bit 85MSPS 3-Channel D/A Converter

48 pin QFP (Plastic)

CXD2309Q

--2--

CXD2309Q

Block Diagram

DECODER

LATCHES

4LSB'S

CURRENT

CELLS

DECODER

LATCHES

6LSB'S

CURRENT

CELLS

CLOCK

GENERATOR

4LSB'S

CURRENT

CELLS

6LSB'S

CURRENT

CELLS

CLOCK

GENERATOR

DECODER

LATCHES

4LSB'S

CURRENT

CELLS

6LSB'S

CURRENT

CELLS

CLOCK

GENERATOR

CURRENT CELLS

(FOR FULL SCALE)

BIAS VOLTAGE

GENERATOR

(LSB) R0

(MSB) R9

RCK

(LSB) G0

(MSB) G9

GCK

(LSB) B0

(MSB) B9

BCK

VREF

IREF

--3--

CXD2309Q

Pin Configuration

(
L

)

R

(
M

)

R

(
L

)

G

I
R

(
M

)

B0 (LSB)

G9 (MSB)

35 , 48

Digital system

Analog system

VREF

Pin Description and Equivalent Circuit

Pin No.

Symbol

I/O

Equivalent circuit

Description

1 to 10

11 to 20

21 to 30

R0 to R9

G0 to G9

B0 to B9

RCLK

GCLK

BCLK

Digital input.

1 pin R0 (LSB) to 10 pin R9 (MSB)

11 pin G0 (LSB) to 20 pin G9 (MSB)

21 pin B0 (LSB) to 30 pin B9 (MSB)

Clock input.

Digital ground.

Connect an approximately 0.1µF

capacitor.

--4--

CXD2309Q

Pin No.

Symbol

I/O

Equivalent circuit

Description

39 to 41

43, 45, 47

IREF

VREF

Reference current output.

Connect an "R

" resistor which are

16 times the output resistance

OUT

Reference voltage input.

Sets an output full-scale value.

Connect an approximately 0.1µF

capacitor.

Analog power supply.

Current output. Output can be

obtained by connecting a resistor

(200

typ.).

Analog ground.

Digital power supply.

--5--

CXD2309Q

Electrical Characteristics

CLK

=85 MHz, AV

=DV

=5 V, R

OUT

=200

, V

REF

=2.0 V, R

=3.3 k

, Ta=25°C)

Item

Resolution

Conversion speed

Integral non-linearity error

Differential non-linearity error

Precision guaranteed

output voltage range

Output full-scale voltage

Output full-scale ratio

Output full-scale current

Output offset voltage

Glitch energy

Crosstalk

SN ratio

Supply current

Analog input resistance

Input capacitance

Output capacitance

Digital input voltage

Digital input current

Setup time

Hold time

Propagation delay time

Rise time

Fall time

Symbol

CLK

SNR

Measurement conditions

=DV

=4.75 to 5.25 V

Ta=20 to +85 °C

Endpoint

When "0000000000" data input

OUT

=100

, 1 Vp-p output

When 10 MHz

CLK

=50 MHz

sin wave input

CLK

=85 MHz

When 1 MHz

CLK

=50 MHz

sin wave input

CLK

=85 MHz

When 10 MHz

CLK

=50 MHz

sin wave output

CLK

=85 MHz

VREF

=DV

=4.75 to 5.25 V

Ta=20 to +75 °C

=DV

=4.75 to 5.25 V

Ta=20 to +75 °C

Min.

2.0

0.5

1.8

9.0

2.15

Typ.

1.92

9.6

125

26.5

26.0

Max.

2.0

0.5

2.0

0.85

Unit

bit

MSPS

LSB

pV·s

µA

Electrical Characteristics Measurement Circuit

Analog Input Resistance

Measurement Circuit

Digital Input Current

CXD2309Q

+5.25V

, DV

}

Full-scale voltage of channel

Full-scale output ratio =

Average of the full-scale voltage of the channels

100 (%)

--6--

CXD2309Q

10bit

COUNTER

with

LATCH

OSCILLOSCOPE

CLK
50MHz
SQUARE
WAVE

VREF

IREF

0.1µ

200

3.3k

RCK

GCK

BCK

R0 to R9

1 to 10

G0 to G9

11 to 20
B0 to B9

21 to 30

Crosstalk Measurement Circuit

DIGITAL

WAVEFORM

GENERATOR

CLK
50MHz
SQUARE
WAVE

0.1µ

VREF

IREF

200

0.1µ

3.3k

RCK

GCK

BCK

R0 to R9

1 to 10

G0 to G9

11 to 20
B0 to B9

21 to 30

SPECTRUM

ANALYZER

Setup Time

Hold Time

Measurement Circuit

Glitch Energy

10bit

COUNTER

with

LATCH

DELAY

CONTROLLER

CLK
50MHz
SQUARE
WAVE

OSCILLOSCOPE

RCK

GCK

BCK

0.1µ

VREF

IREF

200

0.1µ

3.3k

DELAY

CONTROLLER

R0 to R9

1 to 10

G0 to G9

11 to 20
B0 to B9

21 to 30

}

Conversion Rate Measurement Circuit

--7--

CXD2309Q

DC Characteristics Measurement Circuit

DVM

CLK
50MHz
SQUARE
WAVE

0.1µ

200

VREF

IREF

CONTROLLER

3.3k

R0 to R9

1 to 10

RCK

GCK

BCK

G0 to G9

11 to 20
B0 to B9

21 to 30

Propagation Delay Time Measurement Circuit

SNR Measurement Circuit

200

10bit

COUNTER

with

LATCH

DELAY

CONTROLLER

DELAY

CONTROLLER

CLK
50MHz
SQUARE
WAVE

OSCILLOSCOPE

0.1µ

VREF

IREF

200

3.3k

RCK

GCK

BCK

R0 to R9

1 to 10

G0 to G9

11 to 20
B0 to B9

21 to 30

DIGITAL

WAVEFORM

GENERATOR

CLK
50MHz
SQUARE
WAVE

ALL "1"

0.1µ

200

0.1µ

3.3k

VREF

IREF

RCK

GCK

BCK

R0 to R9

1 to 10

G0 to G9

11 to 20
B0 to B9

21 to 30

SPECTRUM

ANALYZER

--9--

CXD2309Q

Notes on Operation

· Selecting the Output Resistance

CXD2309Q is a current output type D/A converter. The output voltage can be obtained by connecting the

resistor R

OUT

to the current output pins RO, GO and BO.

Specifications:

Output full-scale voltage V

= 1.8 to 2.0 [V]

Output full-scale current I

= 9.0 to 10.0 [mA]

Calculate the output resistance from V

= I

OUT

. Connect a resistance sixteen times the output

resistance to the reference current output pin IREF. In some cases, as this value may not exist, a similar

value can be used instead.

Note that the V

will be the following.

= V

REF

16R

OUT

REF

is the voltage set at the reference voltage input pin VREF, R

OUT

is the resistor to be connected to the

current output pins RO, GO, BO and R

is the resistor to be connected to the IREF. Power consumption can

be reduced by increasing the resistance, but this will on the contrary increase the glitch energy and data

setting time. Set the best values according to the purpose of use.

· Correlation between Data and Clock

For CXD2309Q to display the desired performance as a D/A converter, the data transmitted from outside and

the clock must be synchronized properly. Adjust the setup time (ts) and hold time (th) as specified in

"Electrical Characteristics".

· Power supply, ground

Separate the analog and digital signals around the device to reduce noise effects. Bypass the power supply

pin to each ground with a 0.1 µF ceramics capacitor as near as possible to the pin for both the digital and

analog signals.

· Latch up

Analog and digital power supplies must be able to share the same power supply of the board. This is to

prevent latch up caused by potential difference between the two pins when the power is turned on.

· IREF

The I

REF

pin is very sensitive to improve the AC characteristics. Pay attention for capacitance component not

to attach to this pin because its output may become unstable.

· VG pin

It is recommended to use a 1 µF capacitor to improve the AC characteristics though the typical capacitance

value externally connected to the VG pin is 0.1 µF.

· Output full-scale voltage

For the applications using the RGB signal, the color balance may be broken up when the RO, GO and BO

output full-scale voltages are used with not adjustment.

--10--

CXD2309Q

· When the power supply (AV

and DV

) is 5.0 V.

· R1=200

· R2=3.3 k

· R3=3.0 k

· R4=2.0 k

· C=0.1 µF

Application Circuit

Clock input

B ch input

LSB

G ch input

R ch

input

MSB

Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.

--11--

CXD2309Q

+5V

DIGITAL IC

CXD2309Q

Latch Up Prevention

The CX2309Q is a CMOS IC which requires latch up precautions. Latch up is mainly generated by the lag in

the voltage rising time of AV

(Pin 39, 40 and 41) and DV

(Pin 48), when power supply is ON.

1. Correct usage

a. When analog and digital supplies are from different sources

b. When analog and digital supplies are from a common source

(i)

(ii)

CXD2309Q

+5V

DIGITAL IC

+5V

DIGITAL IC

CXD2309Q

--12--

CXD2309Q

2. Example when latch up easily occurs

a. When analog and digital supplies are from different sources

b. When analog and digital supplies are from common source

(i)

(ii)

+5V

DIGITAL IC

CXD2309Q

+5V

DIGITAL IC

CXD2309Q

+5V

DIGITAL IC

CXD2309Q

--13--

CXD2309Q

Example of Representative Characteristics

Fig. 1. Reference voltage vs. Output full-scale voltage

t
p

t

f
u

l
l
-
s

l
e

l
t
a

[
V

]

2.0

1.0

Reference voltage V

REF

[V]

1.0

2.0

Fig. 2. Output resistance vs. Glitch energy

l
i
t
c

r
g

[
p

·
s

] 100

Output resistance R

OUT

[

]

100

200

Fig. 3. Ambient temperature vs. Output full-scale voltage

1.95

1.90

Ambient temperature Ta [°C]

t
p

t

f
u

l
l
-
s

l
e

l
t
a

[
V

]

V=0.02mV/°C

Fig. 4. Output frequency vs. Supply current

Output frequency Fo [MHz]

l
y

r
r
e

t

I

[
m

]

sin wave output

Standard Measurement Conditions

· AV

=DV

=5.0 V

· V

REF

=2.0 V

· F

CLK

=85 MHZ

· R

OUT

=200

· R

=3.3 k

· Ta=25 °C

--14--

CXD2309Q

Fig. 5. Clock frequency vs. Supply current

l
y

r
r
e

t

I

[
m

]

Clock frequency F

CLK

[MHz]

[Analog]

[Digital]

Fig. 6. Clock frequency vs. Supply current

l
y

r
r
e

t

I

[
m

]

Clock frequency F

CLK

[MHz]

fout=10MHz sin wave

[Analog]

[Digital]

Fig. 7. Output frequency vs. Cross talk

r
o

t
a

l
k

[
d

]

Output frequency Fo [MHz]

sin wave output

Fig. 8. Output frequency vs. Output level

(Including primary hold characteristics sinx/x)

t
p

t

l
e

l

[
d

]

Output frequency Fo [MHz]

fout=1MHz sin wave

Standard Measurement Conditions

· AV

=DV

=5.0 V

· V

REF

=2.0 V

· F

CLK

=85 MHZ

· R

OUT

=200

· R

=3.3 k

· Ta=25 °C

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: CXD2309

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: CXD2309