HT82V16 Datasheet, PDF (1/12 Pages) Holtek Semiconductor Inc – 16-Bit CCD/CIS Analog Signal Processor

HT82V16
16-Bit CCD/CIS Analog Signal Processor
Features
· Low power CMOS: 350mW
· 9 ADC clock latency for digital data output
· 16-bit 6 MSPS A/D converter
· 3-channel correlated double sampler
· 1~6 programmable gain
· Input clamp circuitry for CDS-mode
· Internal/external circuit for CIS
General Description
The HT82V16 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 16-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 switch operation
· Programmable 3-wire serial interface
· +5V digital I/O compatibility
· 28-pin SOP (300mil) 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 16-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 6 - b it
ADC
D 15~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
Rev. 1.10
1
June 7, 2001