LTC1380 Datasheet, PDF (1/12 Pages) Linear Technology – Single-Ended 8-Channel/ Differential 4-Channel Analog Multiplexer with SMBus Interface

LTC1380/LTC1393
Single-Ended 8-Channel/
Differential 4-Channel Analog
Multiplexer with SMBus Interface
FEATURES
s _{Micropower Operation: Supply Current = 20µA Max}
s _{2-Wire SMBus Interface}
s _{Single 2.7V to ±5V Supply Operation}
s _{Expandable to 32 Single or 16 Differential Channels}
s _{Guaranteed Break-Before-Make}
s _{Low RON: 35Ω Single Ended/70Ω Differential}
s _{Low Charge Injection: 20pC Max}
s _{Low Leakage: ±5nA Max}
s _{Available in 16-Lead SO and GN Packages}
U
APPLICATIONS
s _{Data Acquisition Systems}
s _{Process Control}
s _{Laptop Computers}
s _{Signal Multiplexing/Demultiplexing}
s _{Analog-to-Digital Conversion Systems}
DESCRIPTION
The LTC^®1380/LTC1393 are CMOS analog multiplexers with
SMBus^® 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 10µA. Both digital interface
pins are SMBus compatible over the full operating supply
voltage range. The LTC1380 analog switches feature a
typical R_ON of 35Ω (±5V supplies), typical switch leakage of
20pA and guaranteed break-before-make operation. Charge
injection is ±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.
TYPICAL APPLICATION
LTC1380 Single-Ended 8-Channel Multiplexer
5V
8 ANALOG
INPUTS
1
S0
2
S1
16
V_CC
15
SCL
3
S2
14
SDA
4
S3
13
A0
5 ^LTC1380 12
S4
A1
6
S5
11
GND
7
S6
8
S7
10
V_EE
9
D_O
SMBus
0.1µF 15k 15k _HOST
SCL
SDA
ANALOG OUTPUT
0.1µF
– 5V
1380/93 TA01
On Resistance vs V_S
250
225
T_A = 25°C
I_D = 1mA
200
175
150
125
100
75
V_CC = 5V
50
V_EE = – 5V
25
0
–5 –4 –3 –2 –1 0 1
V_S (V)
V_CC = 2.7V
V_EE = 0V
V_CC = 5V
V_EE = 0V
2345
1167 G15
1