DATA SHEET
The LND-2141-PKG
UP TO 48 CHANNEL VOLTAGE MULTIPLEXER
Features
•
Digitally select up to 48
input channels
•
Clamps all unused
channels to external pin
•
Select AC or DC voltages
•
Standard logic voltage
operation
Applications
•
Sensor Arrays
•
Security Monitors
•
Input Devices
•
Embedded Controllers
Linear Dimensions, Inc. 445 East Ohio Street, Chicago, IL 60611 p 312.3211810 f 312.321.1830
The LND-2141-PKG
Up to 48 Channel
Voltage Multiplexer
What is the LND-2141-PKG?
The LND-2141-PKG is an analog voltage multiplexer with up to 48 input
channels. Digital logic inputs control selection of the desired mux register.
The device can pass either AC or DC signals through the selected line while
simultaneously clamping all unused inputs to USEL. The LND-2141 is particularly
useful for using a single analysis channel to selectively examine multiple analog
sensor inputs using microcontroller control. Applications include embedded
systems, position controllers, and multi-channel filters. For customers with high
volumes requiring less than 48 input channels, Linear Dimensions can package
the LND-2141 in packages with fewer pins.
How does it work?
Reset
To reset the device, set all data pins to zero, hold pin M and pin D low for at
least 64 clock cycles, then return M and D to their quiescent (high) states. This
clears the digital state information on all internal registers.
Load Internal Registers
To select a mux channel, put the channel number onto the 6 bit wide data
register and pull M low and then high while D remains high. To select new
channels simply repeat the process with the appropriate mux channel number
on the data inputs.
How Do I get samples?
The LND-2141 is available in 84 pin PGA sample packages. Depending upon
the number of channels required, the device is available in most standard
surface mount and dip packages including 68-pin PLCC.
