Data Sheet

CDK3405

8-bit, 180MSPS, Triple Video DAC

Exar Corporation

www.exar.com

48720 Kato Road, Fremont CA 94538, USA

Tel. +1 510 668-7000 - Fax. +1 510 668-7001

FEATURES

n

8-bit resolution, 180MSPS

n

±2.5% gain matching

n

±0.5% linearity error

n

Sync and blank controls

n

n

Internal bandgap voltage reference

n

Low glitch energy

n

Single +3.3V power supply

APPLICATION S

n

Video signal conversion

– RGB

– Composite, Y, C

n

Multimedia systems

n

Image processing

n

PC Graphics

General Description

CDK3405 is a low-cost triple D/A converter that is tailored to fit graphics and

video applications where speed is critical.

CMOS-level inputs are converted to analog current outputs that can drive

25-37.5Ω loads corresponding to doubly-terminated 50-75Ω loads. A sync

BLANK = L. Although appropriate for many applications, the internal 1.25V

Few external components are required, just the current reference resistor,

current output load resistors, bypass capacitors, and decoupling capacitors.

Package is a 48-lead TQFP. Fabrication technology is CMOS. Performance is

guaranteed from -40°C to +125°C.

Block Diagram

Ordering Information

Part Number

Package

Pb-Free

RoHS Compliant Operating Temp Range Packaging Method Package Quantity

CDK3405CTQ48

TQFP-48

Yes

Yes

0°C to +70°C

Tray

250

CDK3405ATQ48

TQFP-48

Yes

Yes

-40°C to +125°C

Tray

250

Moisture sensitivity level for all parts is MSL-3.

8-bit D/A

Converter

8

SYNC

CLOCK

G7-0

COMP

+1.25V

Ref

BLANK

8-bit D/A

Converter

8

B7-0

8-bit D/A

Converter

8

R7-0

REF

REF

SYNC

R

V