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參數(shù)資料
| 型號： | AD9923A |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CCD Signal Processor with V-Driver and Precision Timing⑩ Generator |
| 中文描述： | CCD信號處理器與V - Driver和精確定時⑩發(fā)生器 |
| 文件頁數(shù)： | 45/88頁 |
| 文件大小： | 852K |
| 代理商： | AD9923A |
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AD9923A
Rev. 0 | Page 45 of 88
XV7
V7B
VSG8
VH
VM
VL
0
Figure 61. XV7, VSG8, and V7B Output Polarities
XV2, XV4, XV6, XV8
XV9, XV10, XV13
VM
V2, V4, V6, V8
V9, V10, V13
VL
0
Figure 62. XV2, XV4, XV6, XV8, XV9, XV10, XV13 and V2, V4, V6, V8, V9, V10, V13 Output Polarities
XSUBCNT
SUBCK
XSUBCK
VH
VMM
VLL
0
Figure 63. XSUBCNT, XSUBCK, and SUBCK Output Polarities
SHUTTER TIMING CONTROL
The CCD image exposure time is controlled by the substrate clock
signal (SUBCK) that pulses the CCD substrate to clear out
accumulated charge. The AD9923A supports three types of
electronic shuttering: normal, high precision, and low speed.
Together with the SUBCK pulse placement, the AD9923A can
accommodate different readout configurations to further
suppress the SUBCK pulses during multiple field readouts. The
AD9923A also provides programmable outputs to control an
external mechanical shutter (MSHUT), strobe/flash (STROBE),
and CCD bias select signal (VSUB). Up to four general shutter
pulses (SHUT0 to SHUT3) and two VSUB pulses (VSUB0 and
VSUB1) can be programmed and assigned to any of the three
shutter output pins. The user can also combine the following
shutter and VSUB pulses with a logic XOR operation (symbolized
by ^) to generate more complex timing (up to four toggle posi-
tions per line) for MSHUT, STROBE and VSUB: SHUT0 ^ VSUB0,
SHUT0 ^ VSUB1, SHUT0 ^ SHUT1, and SHUT0 ^ SHUT2.
SUBCK: Three-Level Output
The AD9923A supports a three-level output from the SUBCK
buffer: VH, VMM, and VLL. The VH power supply is shared
with the V-driver outputs, but VMM and VLL are dedicated
mid and low supplies for the SUBCK buffer. There are two in-
puts to the SUBCK buffer, XSUBCK and XSUBCNT. XSUBCNT
is created by an internal multiplexer that selects from XV1 to
XV13, VSG1 to VSG8, MSHUT, STROBE, VSUB, SHUT0 to
SHUT3, FG_TRIG, high and low.
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| AD9924BBCZ | 制造商:Analog Devices 功能描述: |
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