XRD9836ACG Exar Corporation, XRD9836ACG Datasheet - Page 29

• Manufacturer Part Number: XRD9836ACG
• Description: IC 16B CCD/CIS SIG PROC 48TSSOP
• Manufacturer: Exar Corporation

Specifications of XRD9836ACG

• Package / Case: 48-TSSOP (0.240", 6.10mm Width)
• Number Of Bits: 16
• Number Of Channels: 3
• Power (watts): 500mW
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

xr
xr
APPLICATION NOTES AND SCHEMAT-
ICS
See Figure 23 for a typical CCD application hookup.
The diagram shows an interface to a standard 3
channel output CCD. Both the ADC Output and OGI
Control are parallel interfaces to the system ASIC
controller. The timing inputs are provided by the sys-
tem ASIC or timing generator (TG). The serial port
control is typically sourced from a micro processor or
the system ASIC.
It is recommended that all AGND, DGND and OGND
pins, be connected to the analog ground plane under
The XRD9836 has an input range limitation of 1V
maximum for a CCD input. If the maximum CCD out-
put signal swing is greater than 1V, a resisitive divider
network on the inputs can be used to reduce the CCD
output to meet the 1V input max requirement of the
XRD9836 inputs. See Figure 24 for a typical imple-
mentation of a resistor divider. Each input channel will
require a matching divider network.
F
IGURE
CCD
23. T
YPICAL
CCD A
15V
PPLICATION
(timing generator)
TG
ASIC
D
IAGRAM FOR THE
10K
1nf
1nf
1nf
1nf
1nf
1nf
29
F
the XRD9836. All VDD’s should be supplied from a
low noise, well filtered regulator which derives the
power supply voltage from the CCD power supply. All
of the AVDD pins are analog power supplies and
should be decoupled locally to the nearest ground pin
with at 0.1uF, high frequency capacitor. The DVDD
and OVDD power pins should be locally decoupled to
the nearest ground pin also. DVDD and OVDD should
be connected to the same power supply network as
the digital ASCI which receives data from the
XRD9836.
IGURE
XRD9836
VSAMP
LCLMP
RED+
BLU+
ADCCLKK
BSAMP
LOAD
RED-
GRN+
BLU-
REXT
SDIO
GRN-
SCLK
A
G
N
D
VDD3A VDD3D
CCD
24. I
A
V
D
D
A
V
D
D
A
G
N
D
9836
A
V
D
D
A
G
N
D
D
V
D
D
D
G
N
D
NPUT
O
V
D
D
O
G
N
D
O
V
D
D
O
G
N
D
ADCO7
ADCO6
ADCO5
ADCO4
ADCO3
ADCO2
ADCO1
ADCO0
CMREF
R1
R2
R
CAPP
CAPN
OGI9
OGI8
OGI7
OGI6
OGI5
OGI4
OGI3
OGI2
OGI1
OGI0
15V
IE
ESISTIVE
V
V
V
sig
in
0.1uf
16-BIT PIXEL GAIN AFE
in
=
C1
C2
D
V
sig
IVIDER
1nf
1nf
1uf
(R1/(R1+R2))
OUTPUT
CONTROL
ADC
BUS
ASIC
OGI
ground with capacitors placed
It is recommended that each
power pin be decoupled to
as close to power pin as
N
RED -
ETWORK
RED+
possible.
XRD9836
XRD9836
REV. 1.0.0