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LTC1391IS Datasheet(PDF) 1 Page - Linear Technology |
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LTC1391IS Datasheet(HTML) 1 Page - Linear Technology |
1 / 9 page 1 LTC1391 8-Channel Analog Multiplexer with Cascadable Serial Interface s Low RON: 45Ω s Single 2.7V to ±5V Supply Operation s Analog Inputs May Extend to Supply Rails s Low Charge Injection s Serial Digital Interface s Low Leakage: ±5nA Max s Guaranteed Break-Before-Make s TTL/CMOS Compatible for All Digital Inputs s Cascadable to Allow Additional Channels s Can Be Used as a Demultiplexer FEATURES 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, increas- ing the number of MUX channels available using a single digital port. The LTC1391 features a typical RON of 45Ω, a typical switch leakage of 50pA and guaranteed break-before- make operation. Charge injection is ±10pC maximum. All digital inputs are TTL and CMOS compatible when oper- ated from single or dual supplies. The inputs can with- stand 100mA 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. s Data Acquisition Systems s Communication Systems s Signal Multiplexing/Demultiplexing APPLICATIONS , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 S0 S1 S2 S3 S4 S5 S6 S7 V+ D V – DOUT DIN CS CLK GND ANALOG INPUTS LTC1391 1 2 3 4 8 7 6 5 VCC CLK DOUT CS/SHDN VREF +IN –IN GND LTC1285 3V 0.1 µF OPTIONAL A/D INPUT FILTER 1 µF DATA IN CLK CS DATA OUT SERIAL INTERFACE TO MUX AND ADC 1391 TA01 ANALOG INPUT VOLTAGE (V) –5 –4 –2 0 2 4 300 250 200 150 100 50 0 –3 –1 1 3 1391 TA02 5 TA = 25°C V+ = 2.7V V – = 0V V+ = 5V V – = –5V On-Resistance vs Analog Input Voltage 3V, 8-Channel 12-Bit ADC |
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