SUBN

SUB

100 ∼ 1000 pF

TG

VSP1900

SUB

V#N

V#

V#

CH#N

CH#

V#

CCD

CCD Drain Bias

SUB

1 M

Ω

VSP1900

SLES062A – MARCH 2003 – REVISED JUNE 2012

www.ti.com

DESCRIPTION

The VSP1900 is a CCD vertical clock driver with electric shutter. The VSP1900 is composed of five 3-state and

three 2-state vertical transfer channels, which support both 3 field and 2 field CCD operation. The VSP1900

contributes low power consumption and parts number reduction in the system.

OPERATION

Power On/Off Sequence

This is the same as the CCD power up sequence, when power on, VDD powers on first VH, VM powers on

second, and VL powers on later. When powering off, VL powers off first, VH, VM powers off second, and VDD

powers off later.

Vertical Transfer Signal

The VSP1900 receives signals from TG (CCD timing generator). The input signal is converted into the operating

voltage levels of the CCD by the level shifter. The level shifter circuits connect to a 2-state or 3-state driver,

which is connected to the CCD input pin. While using a 2-field CCD, one of the 3-state drivers is used as a 2-

state driver. The CH#N pin is pulled up internally, so that the VH level does not appear on the output pin.

Figure 2. VSP1900 Circuit Application

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REVISION HISTORY

Changes from Original (March 2003) to Revision A

Page

•

Changed the last sentence of the Description From: "part number reduction in the system." To: " device count

reduction in the system. ........................................................................................................................................................ 1

•

Deleted the Tape and reel option from the Ordering Information Table ............................................................................... 2

•

Changed the Package temperature value From 2.35°C to 260°C ....................................................................................... 2

•

Added Table Note " Specified by Design" to the MIN and MAX columns of the ELECTRICAL CHARACTERISTICS

and SWITCHING CHARACTERISTICS. .............................................................................................................................. 3

•

Changed the Truth Table ...................................................................................................................................................... 6

8

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