Texas Instruments TL1593CNS-X, TL1593CNS Datasheet

TL1593C

3-CHANNEL SAMPLE-AND-HOLD CIRCUIT

SOCS027B – APRIL 1987 – REVISED JULY 1991

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• Designed for Use With TI Virtual-Phase

CCD Image Sensors

• Supports Both Color and Monochrome

Applications

• Contains Three Separate Sample-and-Hold

Circuits

• Differential Input With 11-dB Gain

• 5-MHz Sampling Rate on Each Channel

• Separate Analog and Digital Supplies for

Immunity to Switching Transients

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, Method 3015; however, precautions should be taken to avoid application of any voltage higher than maximum-rated voltages to these

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 VCC or ground. 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.

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10

ANLG V

AIN1 CIN1 AIN2 CIN2 AIN3 CIN3

ANLG GND

S/H

DIG V

OUT1 OUT2 OUT3 DIG GND

NS PACKAGE

(TOP VIEW)

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.

TL1593C 3-CHANNEL SAMPLE-AND-HOLD CIRCUIT

SOCS027B – APRIL 1987 – REVISED JULY 1991

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

schematic

–

OUT1

11 dB

S/H1

CIN1

AIN1

–

DIG GND

ANLG GND

–

OUT2

11 dB

–

S/H2

CIN2

AIN2

DIG GND

ANLG GND

–

OUT3

11 dB

–

S/H3

CIN3

AIN3

DIG GND

ANLG GND

Terminal Functions

TERMINAL

NAME NO.

I/O

DESCRIPTION

AIN1 2 I Channel 1 analog input AIN2 4 I Channel 2 analog input AIN3 6 I Channel 3 analog input ANLG GND 8 Analog ground ANLG V

1 Analog supply voltage CIN1 3 I Channel 1 compensation input CIN2 5 I Channel 2 compensation input CIN3 7 I Channel 3 compensation input DIG GND 9 Digital ground DIG V

13 Digital supply voltage OUT1 12 O Channel 1 output OUT2 11 O Channel 2 output OUT3 10 O Channel 3 output S/H1 16 I Channel 1 sample-and-hold input S/H2 15 I Channel 2 sample-and-hold input S/H3 14 I Channel 3 sample-and-hold input

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