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AD9845B Datasheet(PDF) 5 Page - Analog Devices |
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AD9845B Datasheet(HTML) 5 Page - Analog Devices |
5 / 24 page REV. B –5– AD9845B 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 AD9845B 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. TIMING SPECIFICATIONS Parameter Symbol Min Typ Max Unit SAMPLE CLOCKS DATACLK, SHP, SHD Clock Period tCP 33 33 ns DATACLK High/Low Pulsewidth tADC 13 16.7 ns SHP Pulsewidth tSHP 5 8.3 ns SHD Pulsewidth tSHD 5 8.3 ns CLPDM Pulsewidth tCDM 410 Pixels CLPOB Pulsewidth* tCOB 220 Pixels SHP Rising Edge to SHD Falling Edge tS1 0 8.3 ns SHP Rising Edge to SHD Rising Edge tS2 15 16.7 ns Internal Clock Delay tID 3.0 ns Inhibited Clock Period tINH 10 ns DATA OUTPUTS Output Delay tOD 13 16 ns Output Hold Time tH 7.0 7.6 ns Pipeline Delay 9 Cycles SERIAL INTERFACE Maximum SCK Frequency fSCLK 10 MHz SL to SCK Setup Time tLS 10 ns SCK to SL Hold Time tLH 10 ns SDATA Valid to SCK Rising Edge Setup tDS 10 ns SCK Falling Edge to SDATA Valid Hold tDH 10 ns SCK Falling Edge to SDATA Valid Read tDV 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. (CL = 20 pF, fSAMP = 30 MHz, CCD Mode Timing in Figures 5 and 6, AUX Mode Timing in Figure 7, Serial Timing in Figures 21–24.) 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 SHP, SHD, DATACLK DVSS –0.3 DVDD + 0.3 V CLPOB, CLPDM, 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 BYP1-3, CCDIN AVSS –0.3 AVDD + 0.3 V Junction Temperature 150 ∞C Lead Temperature (10 sec) 300 ∞C ORDERING GUIDE Temperature Package Package Model Range Description Option AD9845BJST –20 ∞C to +85∞C LQFP ST-48 THERMAL CHARACTERISTICS Thermal Resistance 48-Lead LQFP Package qJA = 56∞C/W* * qJA is measured using a 4-layer PCB. |
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