HT82V14 Datasheet, PDF (1/12 Pages) Holtek Semiconductor Inc – 14-Bit CCD/CIS Analog Signal Processor

HT82V14
14-Bit CCD/CIS Analog Signal Processor
Features
· Low power CMOS : 350 mW
· 9 ADC clock latency for digital data output
· 14-bit 6 MSPS A/D converter
· 3-channel correlated double sampler
· 1~6 programmable gain
· Input clamp circuitry for CDS-mode
· Internal/external circuitfor CIS
General Description
The HT82V14 is a complete analog signal pro-
cessor for CCD imaging applications. It fea-
tures a 3-channel architecture designed to
sample and condition the outputs of the
trilinear color CCD arrays. Each channel con-
sists of an input clamp, Correlated Double
Sampler (CDS), offset DAC and Programmable
Gain Amplifier (PGA), multiplexed to a high
performance 14-bit A/D converter.
Block Diagram
O FFSET R EFT C M L R EF
· Internal/external voltage reference
· Internal MUX for channel operation
· 1 or 3-channel operation
· Pixel-rate or line-rate switch operation
· Programmable 3-wire serial interface
· +5V digital I/O compatibility
· 28-pin SOP/SOJ package
The CDS amplifiers may be disabled for use
with sensors such as Contact Image Sensors
(CIS) and CMOS active pixel sensors, which do
not require CDS.
The 14-bit digital output is multiplexed into an
8-bit output word that is accessed using two
read cycles. The internal registers are pro-
grammed through a 3-wire serial interface,
which provides gain, offset, and operating mode
adjustments.
OE
V o lta g e R e fe r e n c e
R IN
C LP
CDS +
VG A
P ix e l R a te
G u a ra n te e
G IN
C LP
CDS
+
VG A
M UX
PG A
1 4 - b it
ADC
D 13~D 0
B IN
C LP
CDS
+
VG A
C o n tro l
P o rt
S C LK
CS
SD ATA
3 ´ 8 b its
DAC
O ffs e t
3 ´ 2 b its
C o a rs e
G a in
C o n fig
R e g is te r
3 ´ 5 b its
F in e
G a in
C D S C LK 1 C D S C LK 2
A D C C LK
1
July 12, 2000