AD9945(RevC) データシートの表示（PDF） - Analog Devices

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AD9945
(Rev.:RevC)

Complete 12-Bit 40 MHz CCD Signal Processor

Analog Devices 

AD9945

TIMING SPECIFICATIONS (CL = 20 pF, fSAMP = 40 MHz, CCD Mode Timing in Figures 8 and 9, Serial Timing in Figures 4 and 5.)

Parameter

Symbol

Min

Typ

Max Unit

SAMPLE CLOCKS

DATACLK, SHP, SHD Clock Period

DATACLK High/Low Pulse Width

SHP Pulse Width

SHD Pulse Width

CLPOB Pulse Width*

SHP Rising Edge to SHD Falling Edge

SHP Rising Edge to SHD Rising Edge

Internal Clock Delay

DATA OUTPUTS

Output Delay

Pipeline Delay

tCONV

tADC

tSHP

tSHD

tCOB

tS1

tS2

tID

tOD

25

10

2

11.25

12.5

6.25

6.25

20

6.25

12.5

3

9.5

10

ns

ns

ns

ns

Pixels

ns

ns

ns

ns

Cycles

SERIAL INTERFACE

Maximum SCK Frequency

SL to SCK Setup Time

SCK to SL Hold Time

SDATA Valid to SCK Rising Edge Setup

SCK Falling Edge to SDATA Valid Hold

fSCLK

10

tLS

10

tLH

10

tDS

10

tDH

10

MHz

ns

ns

ns

ns

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

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS*

Parameter

With

Respect

To

Min Max

Unit

AVDD

DVDD

DRVDD

Digital Outputs

SHP, SHD, DATACLK

CLPOB, PBLK

SCK, SL, SDATA

REFT, REFB, CCDIN

Junction Temperature

Lead Temperature

(10 sec)

AVSS

DVSS

DRVSS

DRVSS

DVSS

DVSS

DVSS

AVSS

–0.3 +3.9

V

–0.3 +3.9

V

–0.3 +3.9

V

–0.3 DRVDD + 0.3 V

–0.3 DVDD + 0.3 V

–0.3 DVDD + 0.3 V

–0.3 DVDD + 0.3 V

–0.3 AVDD + 0.3 V

150

°C

300

°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions outside of those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum ratings

for extended periods may affect device reliability.

THERMAL CHARACTERISTICS

Thermal Resistance

32-Lead LFCSP Package

θJA = 27.7 °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

AD9945 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.

–4–

REV. C

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