LINEAR TECHNOLOGY LTC1391 Data Sheet manual instructions

LTC1391 8-Channel

Analog Multiplexer with Cascadable Serial Interface

FEATURES DESCRIPTIO

®1391 is a high performance CMOS 8-to-1 analog

Low RON: 45Ω The LTC Single 2.7V to ±5V Supply Operation multiplexer. It features a serial digital interface that allows Low Charge Injection several LTC1391s to be daisy-chained together, increas-

Serial Digital Interface ing the number of MUX channels available using a single Analog Inputs May Extend to Supply Rails digital port.

Low Leakage: ±5n A Max

The LTC1391 features a typical RON of 45Ω, a typical

Guaranteed Break-Before-Make

switch leakage of 50p A and guaranteed break-before-

TTL/CMOS Compatible for All Digital Inputs

make operation. Charge injection is ±10p C maximum. All

Cascadable to Allow Additional Channels

digital inputs are TTL and CMOS compatible when oper-

Can Be Used as a Demultiplexer

ated from single or dual supplies. The inputs can with- stand 100m A fault current.

APPLICATIO S

The LTC1391 is available in 16-pin PDIP, SSOP and

Data Acquisition Systems narrow SO packages. For applications requiring 2-way Communication Systems serial data transmission, see the LTC1390 data sheet. Signal Multiplexing/Demultiplexing

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

ON -R ES IS TA NC (Ω

TYPICAL APPLICATIO

On-Resistance vs Analog Input Voltage3V, 8-Channel 12-Bit ADC

0.1µF OPTIONAL A/D 1µF TA = 25°C S0 V+ INPUT FILTER VREF VCC

S1 +IN CLK

LTC1285

S2 –IN DOUT ANALOG S3 DOUT GND CS/SHDN INPUTS LTC1391 S4 DIN S5 CS S6 CLK

S7 GND

DATA IN

SERIAL INTERFACE CLK

ANALOG INPUT VOLTAGE (V)

TO MUX AND ADC CS 1391 TA02

DATA OUT

1391 TA01

sn1391 1391fas