LTC203MJ 데이터 시트보기 (PDF) - Linear Technology

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LTC203MJ

Micropower, Low Charge Injection, Quad CMOS Analog Switches

Linear Technology 

LTC201A/LTC202/LTC203

Micropower, Low Charge

Injection, Quad CMOS Analog Switches

FEATURES

■ Micropower Operation

■ Single 5V or ±15V Supply Operation

■ Low Charge Injection

■ Low RON

■ Low Leakage

■ Guaranteed Break Before Make

■ Latch Resistant Design

■ TTL/CMOS Compatible

■ Improved Second Source for DG2O1A/DG202

U

KEY SPECIFICATIO S

■ Supply Current ................... I+ = 40µA, I– = 5µA Max

■ Charge Injection

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

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

■ RON ............................................................. 65Ω Typ

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

DESCRIPTIO

The LTC®201A, LTC202, and LTC203 are micropower,

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.

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

TYPICAL APPLICATIO

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

VIN

OV TO 5V

220k*

100Hz TRIM

(240k* TYP)

50k

+

1/2 LT ®1178

–

2k

0.33µF

1.5M

12k

1N4148

47k

0.01µF

3pF

2N3906

1µF

NC

2N3904

74C14

10M

VDD

CLK CD4024 Q7

RESET

VSS

FOUT

2µF

100Ω

1µF

1/2 LT1178

7V TO 10V

100k

10k

LT1004-2.5

LINEARITY IS 0.02%

QUIESCENT CURRENT IS 90µA

SUPPLY CURRENT IS 360µA AT 1MHz

*1%FILM RESISTOR

S1

S3

V+

IN2

IN3

IN1

IN4

GND

V–

S4

S2

0.022µF D1

D3

500pF

POLYSTYRENE

LTC201A/LTC202

D4

D2

LTC201A/202/203•TA01

201a23fb

1

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