a

FEATURES

140 MSPS Maximum Conversion Rate

300 MHz Analog Bandwidth

0.5 V to 1.0 V Analog Input Range

500 ps p-p PLL Clock Jitter at 110 MSPS

3.3 V Power Supply

Full Sync Processing

Sync Detect for ”Hot Plugging”

Midscale Clamping

Power-Down Mode

Low Power: 500 mW Typical

4:2:2 Output Format Mode

APPLICATIONS

RGB Graphics Processing

LCD Monitors and Projectors

Plasma Display Panels

Scan Converters

Microdisplays

Digital TV

110 MSPS/140 MSPS Analog Interface for

Flat Panel Displays

AD9883A

FUNCTIONAL BLOCK DIAGRAM

R

AIN

G

AIN

B

AIN

HSYNC

COAST

CLAMP

FILT

SCL

SDA

A

0

CLAMP

CLAMP

CLAMP

SYNC

PROCESSING

AND CLOCK

GENERATION

SERIAL REGISTER

AND

POWER MANAGEMENT

A/D

A/D

A/D

8

8

8

REF

AD9883A

R

OUTA

G

OUTA

B

OUTA

MIDSCV

DTACK

HSOUT

VSOUT

SOGOUT

REF

BYPASS

GENERAL DESCRIPTION

The AD9883A is a complete 8-bit, 140 MSPS monolithic analog interface optimized for capturing RGB graphics signals from personal computers and workstations. Its 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz supports resolutions up to SXGA (1280

× 1024 at 75 Hz).

The AD9883A includes a 140 MHz triple ADC with internal

1.25 V reference, a PLL, and programmable gain, offset, and clamp control. The user provides only a 3.3 V power supply, analog input, and HSYNC and COAST signals. Three-state

CMOS outputs may be powered from 2.5 V to 3.3 V.

The AD9883A’s on-chip PLL generates a pixel clock from

HSYNC and COAST inputs. Pixel clock output frequencies range from 12 MHz to 140 MHz. PLL clock jitter is 500 ps p-p typical at 140 MSPS. When the COAST signal is presented, the PLL maintains its output frequency in the absence of

HSYNC. A sampling phase adjustment is provided. Data,

HSYNC and Clock output phase relationships are maintained.

The AD9883A also offers full sync processing for composite sync and sync-on-green applications.

A clamp signal is generated internally or may be provided by the user through the CLAMP input pin. This interface is fully programmable via a 2-wire serial interface.

Fabricated in an advanced CMOS process, the AD9883A is provided in a space-saving 80-lead LQFP surface mount plastic package and is specified over the 0

°C to 70°C temperature range.

REV. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703 www.analog.com

© Analog Devices, Inc., 2001

AD9883A–SPECIFICATIONS

Analog Interface

(V

D

= 3.3 V, V

DD

= 3.3 V, ADC Clock = Maximum Conversion Rate unless otherwise noted.)

Parameter

RESOLUTION

DC ACCURACY

Differential Nonlinearity

Test

Temp Level

Integral Nonlinearity

25 °C I

Full VI

25 °C I

Full VI

Full VI No Missing Codes

ANALOG INPUT

Input Voltage Range

Minimum

Maximum

Gain Tempco

Input Bias Current

Input Offset Voltage

Input Full-Scale Matching

Offset Adjustment Range

REFERENCE OUTPUT

Output Voltage

Temperature Coefficient

Full VI

Full VI

25

°C

V

25 °C IV

Full IV

Full

Full

Full

VI

VI

VI

Full VI

Full V

SWITCHING PERFORMANCE

Maximum Conversion Rate

Minimum Conversion Rate

Data to Clock Skew t

BUFF t

STAH t

DHO t

DAL t

DAH t

DSU t

STASU t

STOSU

HSYNC Input Frequency

Maximum PLL Clock Rate

Minimum PLL Clock Rate

PLL Jitter

Full VI

Full IV

Full IV

Full VI

Full VI

Full VI

Full VI

Full VI

Full VI

Full VI

Full VI

Full IV

Full VI

Full IV

25

°C

IV

Full IV

Full IV Sampling Phase Tempco

DIGITAL INPUTS

Input Voltage, High (V

IH

)

Input Voltage, Low (V

IL

)

Input Voltage, High (V

IH

)

Input Voltage, Low (V

IL

)

Input Capacitance

Full VI

Full VI

Full V

Full V

25

°C

V

Min

1.0

46

1.20

110

–0.5

4.7

4.0

0

4.7

4.0

250

4.7

4.0

15

110

2.5

AD9883AKST-110

Typ

8

±0.5

Max

+1.25/–1.0

±0.5

Guaranteed

+1.35/–1.0

±1.85

±2.0

100

7

1.5

49

1.25

±50

400

15

3

0.5

1

1

50

6.0

52

1.32

10

+2.0

110

12

700

1000

0.8

–1.0

1

+1.0

1

AD9883AKST-140

Min Typ Max

8

1.0

46

1.20

1.25

±50

–0.5

4.7

4.0

0

4.7

4.0

250

4.7

4.0

15

140

2.5

Unit

Bits

±0.5

+1.35/–1.0

LSB

±0.5

+1.45/–1.0

LSB

±2.0

LSB

±2.3

LSB

Guaranteed

100

7

1.5

49

140

400

15

3

0.5

1

1

70

8.0

52

1.32

10

+2.0

110

12

700 1

1000 1

0.8

–1.0

+1.0

V

V

µA

µA pF

MSPS

MSPS

µs

µs

µs

µs

µs ns

µs

µs

µs kHz

MHz

MHz ps p-p ps p-p ps/

°C

V p-p

V p-p ppm/

°C

µA

µA mV

% FS

% FS

V ppm/

°C

–2– REV. 0

Parameter

Test

Temp Level Min

AD9883AKST-110

Typ Max

DIGITAL OUTPUTS

Output Voltage, High (V

OH

)

Output Voltage, Low (V

OL

)

Duty Cycle DATACK

Output Coding

Full VI

Full VI

Full IV

POWER SUPPLY

I

V

D

Supply Voltage

V

DD

Supply Voltage

P

VD

IP

Supply Voltage

I

D

Supply Current (V

D

)

DD

Supply Current (V

DD

)

2

VD

Supply Current (P

Total Power Dissipation

VD

)

Full

Full

IV

IV

Full IV

25 °C V

25

°C

V

25

°C

V

Full VI

Power-Down Supply Current Full VI

Power-Down Dissipation Full VI

DYNAMIC PERFORMANCE

Analog Bandwidth, Full Power 25

°C

V

Transient Response 25 °C V

Overvoltage Recovery Time 25

°C

V

Signal-to-Noise Ratio (SNR) 25 °C V

(Without Harmonics) Full V f

IN

= 40.7 MHz

Crosstalk Full V

THERMAL CHARACTERISTICS

θ

JC

Junction-to-Case

Thermal Resistance

θ

JA

Junction-to-Ambient

Thermal Resistance

V

V

V

D

45

3.0

2.2

3.0

NOTES

1

VCO Range = 10, Charge Pump Current = 110, PLL Divider = 1693.

2

DATACK Load = 15 pF, Data Load = 5 pF.

Specifications subject to change without notice.

– 0.1

50

Binary

3.3

3.3

3.3

132

19

8

525

5

16.5

300

2

1.5

44

43

55

16

35

0.1

55

3.6

3.6

3.6

650

10

33

Min

AD9883AKST-140

Typ Max

V

D

– 0.1

45 50

Binary

0.1

55

3.15

2.2

3.0

3.6

3.6

3.6

300

2

1.5

43

42

55

3.3

3.3

3.3

180

26

11

650

5

16.5

800

10

33

16

35

AD9883A

Unit

V

V

%

MHz ns ns dB dB dBc

V

V

V mA mA mA mW mA mW

°C/W

°C/W

REV. 0 –3–