HT82V842

HT82V842 CCD CDS/PGA/10b-20M-ADC Features · Operating voltage: 2.7V~3.6V · Low power consumption: 70mW (Typ.) · Power down mode: less than 30mW · Accepts a direct signal input to ADC or PGA at 1.0 · Independent ADC input conversion clock and data output clock · Independent CDS and PGA gain control - CDS: -1.94/0/6/12dB - PGA: 0~24dB · Wide gain range: -1.94~36dB · High speed sample and hold circuit: pulse width 11ns VPP (Typ.) · CCD signal input level: 1.1 VP-P (Max.) · 10-bit ADC (up to 20MHz) · Black level neutralizer, target setting: 16~127LSB · Built-in serial interface - DNL: ±0.6 LSB (Typ.) (Min.) · 48-pin LQFP package General Description The HT82V842 is a CMOS single-chip signal processing device for CCD area sensors. It consists of a clamp circuit, Correlated Double Sampler (CDS), Programmable Gain Amplifier (PGA), reference voltage generator, black level detection circuit, 20MHz 10-bit A/D converter (ADC), timing generator for internally required pulses, serial interface for internal function control and PGA gain control. Block Diagram O B P C C D C L P A D C L P A D C K B L K C L P C A P C S S C K S D A T A M O N O U T T im in g G e n e ra to r S e r ia l R e g is te r B a n d G a p C ir c u it V R P V C O M V R N D C C la m p C C D C L P R E F IN C C D IN C C D A D IN O B C A P O B P D A C C o m p a re B la c k L e v e l R e g is te r A D C L P C D S P G A R o u g h P G A F in e 0 ~ 6 d B (0 .0 4 7 d B /S te p ) 1 0 - B it A D C D O 0 ~ D O 9 S /H -1 ...