LTC1380/LTC1393
Single-Ended 8-Channel/
Differential 4-Channel Analog
Multiplexer with SMBus Interface
FEATURES
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DESCRIPTION
The LTC
廬
1380/LTC1393 are CMOS analog multiplexers with
SMBus
廬
compatible digital interfaces. The LTC1380 is a
single-ended 8-channel multiplexer, while the LTC1393 is a
differential 4-channel multiplexer. The SMBus digital inter-
face requires only two wires (SCL and SDA). Both the
LTC1380 and the LTC1393 have four hard-wired SMBus
addresses, selectable with two external address pins. This
allows four devices, each with a unique SMBus address, to
coexist on one system and for four devices to be synchro-
nized with one stop bit.
The supply current is typically 10碌A. Both digital interface
pins are SMBus compatible over the full operating supply
voltage range. The LTC1380 analog switches feature a
typical R
ON
of 35鈩?(鹵5V supplies), typical switch leakage of
20pA and guaranteed break-before-make operation. Charge
injection is
鹵1pC
typical.
The LTC1380/LTC1393 are available in 16-lead SO and GN
packages. Operation is fully specified over the commercial
and industrial temperature ranges.
, LTC and LT are registered trademarks of Linear Technology Corporation.
SMBus is a registered trademark of Intel Corporation.
Micropower Operation: Supply Current = 20碌A Max
2-Wire SMBus Interface
Single 2.7V to
鹵5V
Supply Operation
Expandable to 32 Single or 16 Differential Channels
Guaranteed Break-Before-Make
Low R
ON
: 35鈩?Single Ended/70鈩?Differential
Low Charge Injection: 20pC Max
Low Leakage:
鹵5nA
Max
Available in 16-Lead SO and GN Packages
APPLICATIONS
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Data Acquisition Systems
Process Control
Laptop Computers
Signal Multiplexing/Demultiplexing
Analog-to-Digital Conversion Systems
TYPICAL APPLICATION
LTC1380 Single-Ended 8-Channel Multiplexer
5V
On Resistance vs V
S
250
225
T
A
= 25擄C
I
D
= 1mA
V
CC
= 2.7V
V
EE
= 0V
SMBus
HOST
1
2
3
4
8 ANALOG
INPUTS
5
6
7
8
S0
S1
S2
S3
S4
S5
S6
S7
ON RESISTANCE (鈩?
V
CC
SCL
SDA
LTC1380
A0
A1
GND
V
EE
D
O
16
15
14
13
12
11
10
9
0.1碌F
15k
15k
200
175
150
125
100
75
50
V
CC
= 5V
V
EE
= 鈥?5V
V
CC
= 5V
V
EE
= 0V
SCL
SDA
0.1碌F
鈥?5V
ANALOG OUTPUT
1380/93 TA01
25
0
鈥? 鈥? 鈥? 鈥? 鈥?
0 1
V
S
(V)
2
3
4
5
U
U
U
1167 G15
1