TL1593C
3-CHANNEL SAMPLE-AND-HOLD CIRCUIT
SOCS027B – APRIL 1987 – REVISED JULY 1991
NS PACKAGE
(TOP VIEW)
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Designed for Use With TI Virtual-Phase
CCD Image Sensors
Supports Both Color and Monochrome
Applications
S/H1
S/H2
S/H3
DIG V
OUT1
OUT2
OUT3
ANLG V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CC
AIN1
CIN1
AIN2
CIN2
AIN3
CIN3
Contains Three Separate Sample-and-Hold
Circuits
CC
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Differential Input With 11-dB Gain
5-MHz Sampling Rate on Each Channel
Separate Analog and Digital Supplies for
Immunity to Switching Transients
DIG GND
ANLG GND
description
The TL1593C is a three-channel sample-and-hold integrated circuit designed for use in processing video
signals generated by TI virtual-phase CCD image sensors. It can be used with one-, two-, and three-channel
color and monochrome TI virtual-phase CCDs.
Each sample-and-hold channel consists of a differential-input buffer, a digitally controlled switch, and an output
buffer that has high impedance. Separate supply and ground pins are provided for the analog and digital
sections to ensure optimum isolation. Internal-hold capacitors are included to reduce the external parts count.
The differential inputs allow the amplifier return pin of the imager to be connected to CIN of the sample-and-hold
circuit to obtain common-mode rejection for antiblooming clock transients in the CCD. The analog inputs should
be capacitively coupled from the CCD outputs to ensure optimum performance.
The TL1593C is supplied in a 16-pin plastic package and is characterized for operation from 0°C to 70°C.
This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These
circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C,
Method3015;however, precautionsshouldbetakentoavoidapplicationofanyvoltagehigherthanmaximum-ratedvoltagestothese
high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in
conductive foam. In a circuit, unused inputs should always be connected to an appropriate logic voltage level, preferably either V
Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive
(ESDS) Devices and Assemblies available from Texas Instruments.
or ground.
CC
Copyright 1991, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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