AD9923ABBCZ datasheet(41/88 Pages) AD

41 / 88 page

AD9923A

Rev. 0 | Page 41 of 88

VERTICAL DRIVER SIGNAL CONFIGURATION

As shown in Figure 53, XV1 to XV13, VSG1 to VSG8, and

XSUBCK are outputs from the internal AD9923A timing

generator, and V1 to V13 and SUBCK are the resulting outputs

from the AD9923A vertical driver. When VDR_EN = high, the

vertical driver mixes the XV and VSG pulses and amplifies

them to the high voltages required for driving the CCD. Table 21

through Table 36 describe the output polarities for these signals

vs. their input levels. Refer to these tables when determining the

VDR_EN = low, V1 to V13 are forced to VM and SUBCK is

forced to VLL. The VDR_EN pin takes priority over the XV and

VSG signals coming from the timing generator.

The VDR_EN pin can be driven either with an external 3 V

logic signal or by one of the AD9923A shutter outputs

(MSHUT, VSUB, STROBE). To make the AD9923A compatible

with existing AD9923 designs, drive the VDR_EN pin with a

diode to either an external 3 V logic signal or to one of the

shutter outputs.

AD9923A

V-DRIVER

VH VL

V13

XV13

V10

XV10

XV9

XV8

XV6

XV4

XV2

XV1

VSG1

XV11

VSG2

V11

XV3

VSG3

XV12

VSG4

V12

VSG5

VSG6

XV5

V5A

V5B

VSG7

VSG8

XV7

V7A

V7B

2-LEVEL OUTPUTS

3-LEVEL OUTPUTS

XSUBCK

XSUBCNT

SUBCK

VDR_EN

INTERNAL

TIMING

GENERATOR

Figure 53. Internal Vertical Driver Input Signals

AD9923ABBCZ Datasheet(PDF) 41 Page - Analog Devices

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