LTC201A/LTC202/LTC203

1

201a23fb

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Micropower Operation

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Single 5V or ±15V Supply Operation

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Low Charge Injection

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Low Leakage

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Guaranteed Break Before Make

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Latch Resistant Design

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TTL/CMOS Compatible

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Improved Second Source for DG2O1A/DG202

The LTC

quad CMOS analog switches which typically dissipate only

250µW from ±15V supplies and 40µW from a single 5V

supply. The switches have 65Ω typical on resistance

and a very high off resistance. A break-before-make

characteristic, inherent in these switches, prevents the

shorting of two channels. With a supply voltage of ±15V,

the signal range is ±15V. These switches have special

charge compensation circuitry which greatly reduces

charge injection to a maximum of ±25pC (±15V supplies).

The LTC201A, LTC202, and LTC203 are designed for

applications such as programmable gain amplifiers,

analog multiplexers, sample-and-hold circuits, precision

charge switching and remote switching. These three

devices are differentiated by the type of switch action, as

shown in the logic table.

Micropower, Low Charge

Injection, Quad CMOS Analog Switches

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Charge Injection

±15V Supplies ................................. ±25pC Max

Single 5V Supply .................................. 2pC Typ

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Signal Range .................................................... ±15V

Micropower 100Hz to 1MHz V-to-F Converter

FEATURES

DESCRIPTIO

KEY SPECIFICATIO S

TYPICAL APPLICATIO

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+

S1

D1

D3

S3

IN2

IN3

IN1

IN4

S4

S2

GND

1.5M

OV TO 5V

50k

220k*

2k

47k

10M

3pF

2N3906

1N4148

100Ω

2N3904

12k

0.01µF

CLK

1µF

1µF

7V TO 10V

10k

100k

LT1004-2.5

500pF

POLYSTYRENE

0.022µF

2µF

LINEARITY IS 0.02%

QUIESCENT CURRENT IS 90µA

SUPPLY CURRENT IS 360µA AT 1MHz

*1%FILM RESISTOR

Q7

CD4024

LTC201A/LTC202

RESET

74C14

NC

0.33µF

100Hz TRIM

(240k* TYP)

LTC201A/202/203•TA01

D2

D4

–

+

1/2 LT1178

, LTC and LT are registered trademarks of Linear Technology Corporation.