HT82V842 datasheet(9/18 Pages) HOLTEK

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HT82V842

Rev. 1.00

July 15, 2004

Control

Operations

D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Mode 1

DOUT timing control

DOUT synchronizes to ADCK

DOUT synchronizes to OUTCK

OUTCK polarity

DOUT changes at OUTCK rising edge

DOUT changes at OUTCK falling edge

ADCK polarity

Normal operation as timing chart

ADCK clock inversion

ADIN connection

ADIN function OFF

ADIN signal to PGA

ADIN signal to ADC

Reserved

ADC output

Normal operation, ADC data output

ADC output high-Z, or logic of STBY

Black level reset

Normal operation

Black level reset, or logic of RESET

Power down

0 Normal operation

1 Power down, or logic of STBY

Mode 2

Clamp current

Normal clamp

±50mA

Fast clamp

±100mA

ADIN clamp

Clamp operation active for ADIN

No clamp for ADIN

Clamp target

Normal mode, clamp both REFIN and CCDIN

Clamp REFIN only

Clamp CCDIN only

Clamp off

S/H, enable logic

Normal operation as timing chart

S/H control polarity inversion

Enable control polarity inversion

Both of S/H and enable inversion

Monitor selection

0 Monitor off

1 CDS signal to monitor

0 PGA output monitor

1 Output REFIN and CCDIN

Mode 3

CDS gain control

CDS gain=odB

CDS gain=6.02dB

CDS gain=12.04dB

CDS gain=

-1.94dB

Black loop gain boost

Boost control on

Always high gain

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