LTC1391
LTC1391 is 8-Channel Analog Multiplexer manufactured by Linear Technology.
LTC1391 8-Channel Analog Multiplexer with Cascadable Serial Interface
Features s s s s s s s s s s
DESCRIPTION
The LTC ® 1391 is a high performance CMOS 8-to-1 analog multiplexer. It Features a serial digital interface that allows several LTC1391s to be daisy-chained together, increasing the number of MUX channels available using a single digital port. The LTC1391 Features a typical RON of 45Ω, a typical switch leakage of 50p A and guaranteed break-beforemake operation. Charge injection is ± 10p C maximum. All digital inputs are TTL and CMOS patible when operated from single or dual supplies. The inputs can withstand 100m A fault current. The LTC1391 is available in 16-pin PDIP, SSOP and narrow SO packages. For applications requiring 2-way serial data transmission, see the LTC1390 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low RON: 45Ω Single 2.7V to ± 5V Supply Operation Analog Inputs May Extend to Supply Rails Low Charge Injection Serial Digital Interface Low Leakage: ± 5n A Max Guaranteed Break-Before-Make TTL/CMOS patible for All Digital Inputs Cascadable to Allow Additional Channels Can Be Used as a Demultiplexer
U APPLICATIONS s s s
Data Acquisition Systems munication Systems Signal Multiplexing/Demultiplexing
TYPICAL APPLICATION
3V, 8-Channel 12-Bit ADC
0.1µF OPTIONAL A/D INPUT FILTER 3V
1 2 3 ANALOG INPUTS 4 5 6 7 8
S0 S1 S2 S3 S4 S5 S6 S7 LTC1391
3 4
6 5
ON-RESISTANCE (Ω)
DOUT DIN CS CLK GND DATA IN CLK CS DATA OUT
16 V+ 15 D 14
- V 13 12 11 10 9
1 2
VREF +IN
8 7
1µF
250 200 150 100 50
CLK LTC1285
- IN DOUT GND CS/SHDN
SERIAL INTERFACE TO MUX AND ADC
1391 TA01
On-Resistance vs Analog Input Voltage
TA = 25°C V + = 2.7V...
