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LTC1391CN
(Rev.:RevA)

8-Channel Analog Multiplexer with Cascadable Serial Interface

Linear Technology 

TYPICAL PERFOR A CE CHARACTERISTICS

LTC1391

Driver Output High Voltage

vs Output Current

0

–0.5

V+ = 2.7V

V – = 0V

–1.0

–1.5

V+ = 5V

–2.0

V – = –5V

–2.5

–3.0

–3.5

–4.0

2.0

TA =25°C

2.5 3.0 3.5 4.0 4.5 5.0

OUTPUT VOLTAGE (V)

1391 G04

Driver Output High Voltage

vs Temperature

5.0

4.5

V+ = 5V

V – = –5V

4.0

IO = 1.6mA

3.5

3.0

2.5

2.0

V+ = 2.7V

V – = 0V

1.5

IO = 400µA

1.0

0.5

0

–40 –20

0 20 40 60

TEMPERATURE (°C)

80

1391 G05

PIN FUNCTIONS

S0, S1, S2, S3, S4, S5, S6, S7 (Pins 1, 2, 3, 4, 5, 6, 7,

8): Analog Multiplexer Inputs.

GND (Pin 9): Digital Ground. Connect to system ground.

CLK (Pin 10): System Clock (TTL/CMOS Compatible). The

clock synchronizes the channel selection bits and the

serial data transfer from DIN to DOUT.

CS (Pin 11): Channel Select Input (TTL/CMOS Compat-

ible). A logic high on this input enables the LTC1391 to

read in the channel selection bits and allows digital data

transfer from DIN to DOUT. A logic low on this input puts

DOUT into three-state and enables the selected channel for

analog signal transmission.

DIN (Pin 12): Digital Input (TTL/CMOS Compatible). Input

for the channel selection bits.

DOUT (Pin 13): Digital Output (TTL/CMOS Compatible).

Output from the internal shift register.

V – (Pin 14): Negative Supply. For ±5V dual supply appli-

cations, |V– | should not exceed |V+|by more than 20% for

proper channel selection.

D (Pin 15): Analog Multiplexer Output.

V + (Pin 16): Positive Supply.

sn1391 1391fas

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