AD9891KBCZ Analog Devices Inc, AD9891KBCZ Datasheet - Page 17

• Manufacturer Part Number: AD9891KBCZ
• Manufacturer: Analog Devices Inc

Specifications of AD9891KBCZ

• Analog Front End Type: CCD
• Analog Front End Category: Video
• Interface Type: Serial (3-Wire)
• Operating Supply Voltage (min): 2.7/3V
• Resolution: 10b
• Number Of Adc's: 1
• Power Supply Type: Analog/Digital
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: CSPBGA
• Number Of Channels: 1
• Lead Free Status / RoHS Status: Compliant

VERTICAL TIMING GENERATION
The AD9891/AD9895 provide a very flexible solution for gener-
ating vertical CCD timing and can support multiple CCDs and
different system architectures. The 4-phase vertical transfer
clocks V1–V4 are used to shift each line of pixels into the hori-
zontal output register of the CCD. The AD9891/AD9895 allow
these outputs to be individually programmed into different pulse
patterns. Vertical sequence control registers then organize the
individual vertical pulses into the desired CCD vertical timing
arrangement.
Figure 17 shows an overview of how the vertical timing is gener-
ated in three basic steps. First, the individual pulse patterns or
REV. A
SEQUENCE 10
SEQUENCE 11
SEQUENCE 0
SEQUENCE 1
SEQUENCE 2
SEQUENCE 3
SEQUENCE 4
SEQUENCE 5
SEQUENCE 6
SEQUENCE 7
SEQUENCE 8
SEQUENCE 9
BUILD THE ENTIRE FIELD READOUT BY COMBINING
MULTIPLE REGIONS (MAXIMUM OF 8 COMBINATIONS).
CREATE THE INDIVIDUAL VERTICAL
SEQUENCES (MAXIMUM OF 12 SEQUENCES).
USE REGION 2 FOR LINES 2001 TO 2020
USE REGION 0 FOR LINES 22 TO 2000
USE REGION 2 FOR LINES 1 TO 20
USE REGION 1 FOR LINE 21
Figure 17. Summary of Vertical Timing Generation
–17–
sequences are created by using the Vertical Transfer Pulse (VTP)
Registers. These sequences are a essentially a “pool” of pulse
patterns that may be assigned to any of the V1-V4 outputs. Sec-
ond, individual regions are built by assigning a sequence to each
of the V1–V4 outputs. Up to five unique regions may be speci-
fied. Finally, the readout of the entire field is constructed by
combining one or more of the individual regions sequentially.
With up to eight region areas available, different steps of the
readout such as high speed line shifts and vertical image transfer
can be supported.
REGION 0
REGION 1
REGION 4
*SEQUENCES MAY BE SHIFTED AND/OR INVERTED
BUILD THE INDIVIDUAL VERTICAL REGIONS BY ASSIGNING
EACH SEQUENCE TO V1–V4 OUTPUTS (MAXIMUM OF 5 REGIONS).
V2 (SEQ 6*)
V4 (SEQ 7*)
V2 (SEQ 0*)
V4 (SEQ 1*)
V1 (SEQ 6)
V3 (SEQ 7)
V1 (SEQ 0)
V3 (SEQ 1)
V1 (SEQ 2)
V2 (SEQ 3)
V3 (SEQ 4)
V4 (SEQ 5)
AD9891/AD9895