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AD9802

Analog Devices
Part Number AD9802
Manufacturer Analog Devices
Description CCD Signal Processor For Electronic Cameras
Published Mar 24, 2005
Detailed Description a FEATURES 10-Bit, 18 MSPS A/D Converter 18 MSPS Full Speed Correlated Double Sampler (CDS) Low Noise, Wideband PGA Inte...
Datasheet PDF File AD9802 PDF File

AD9802
AD9802

Overview
a FEATURES 10-Bit, 18 MSPS A/D Converter 18 MSPS Full Speed Correlated Double Sampler (CDS) Low Noise, Wideband PGA Internal Voltage Reference No Missing Codes Guaranteed +3 V Single Supply Operation Low Power CMOS: 185 mW 48-Terminal TQFP Package PBLK PIN DIN ADCIN CCD Signal Processor For Electronic Cameras AD9802 FUNCTIONAL BLOCK DIAGRAM CLPDM PGACONT1 PGACONT2 SHP SHD ADCCLK TIMING GENERATOR PGA 10 MUX S/H A/D DOUT DRVDD CLAMP CDS CLAMP REFERENCE AD9802 DVDD CMLEVEL VRT VRB STBY CLPOB ADCMODE ACVDD ADVDD PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD9802 is a complete CCD signal processor developed for electronic cameras.
It is suitable for both camcorder and consumer-level still camera applications.
The signal processing chain is comprised of a high speed CDS, variable gain PGA and 10-bit ADC.
Required clamping circuitry and an onboard voltage reference are provided as well as a direct ADC input.
The AD9802 operates from a single +3 V supply with a typical power consumption of 185 mW.
The AD9802 is packaged in a space saving 48-terminal thin quad flatpack (TQFP) and is specified over an operating temperature range of 0°C to +70°C.
1.
On-Chip Input Clamp and CDS Clamp circuitry and high speed correlated double sampler allow for simple ac-coupling to interface a CCD sensor at full 18 MSPS conversion rate.
2.
On-Chip PGA The AD9802 includes a low-noise, wideband amplifier with analog variable gain from 0 dB to 31.
5 dB (linear in dB).
3.
Direct ADC Input A direct input to the 10-bit A/D converter is provided for digitizing video signals.
4.
10-Bit, High Speed A/D Converter A linear 10-bit ADC is capable of digitizing CCD signals at the full 18 MSPS conversion rate.
Typical DNL is ± 0.
5 LSB and no missing code performance is guaranteed.
5.
Low Power At 185 mW, and 15 mW in power-down, the AD9802 consumes a fraction of the power of presently available multichip solutions.
6.
Digital I/O Functionality The AD9802 offers three-state digital output control.
7.
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