REV. 0

–4–

AD9821

ABSOLUTE MAXIMUM RATINGS

With

Respect

Parameter

To

Min

Max

Unit

AVDD1, AVDD2

AVSS

–0.3

+3.9

V

DVDD1, DVDD2

DVSS

–0.3

+3.9

V

DRVDD

DRVSS

–0.3

+3.9

V

Digital Outputs

DRVSS

–0.3

DRVDD + 0.3

V

DATACLK

DVSS

–0.3

DVDD + 0.3

V

CLPOB, PBLK

DVSS

–0.3

DVDD + 0.3

V

SCK, SL, SDATA

DVSS

–0.3

DVDD + 0.3

V

VRT, VRB

AVSS

–0.3

AVDD + 0.3

V

BYP1, VIN

AVSS

–0.3

AVDD + 0.3

V

Junction Temperature

150

°C

Lead Temperature

300

°C

(10 sec)

TIMING SPECIFICATIONS

Parameter

Symbol

Min

Typ

Max

Unit

SAMPLE CLOCKS

DATACLK Clock Period

25

25

ns

DATACLK Hi/Low Pulsewidth

11

12.5

ns

CLPOB Pulsewidth

*

220

Pixels

Internal Clock Delay

3.0

ns

DATA OUTPUTS

Output Delay

13

16

ns

Output Hold Time

7.0

7.6

ns

Pipeline Delay

9

Cycles

SERIAL INTERFACE

Maximum SCK Frequency

10

MHz

SL to SCK Setup Time

10

ns

SCK to SL Hold Time

10

ns

SDATA Valid to SCK Rising Edge Setup

10

ns

SCK Falling Edge to SDATA Valid Hold

10

ns

SCK Falling Edge to SDATA Valid Read

10

ns

*Minimum CLPOB pulsewidth is for functional operation only. Wider typical pulses are recommended to achieve low noise clamp performance.

Specifications subject to change without notice.

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

AD9821KST

–20

°C to +85°CThin Plastic

ST-48

Quad Flatpack

(LQFP)

THERMAL CHARACTERISTICS

Thermal Resistance

48-Lead LQFP Package

θ

°C/W

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although the

AD9821 features proprietary ESD protection circuitry, permanent damage may occur on devices

subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended

to avoid performance degradation or loss of functionality.