LND-FIL309 データシートの表示（PDF） - Linear Dimensions Semiconductor

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LND-FIL309

Up to 48 Channel Voltage Multiplexer + Bandpass Filter

Linear Dimensions Semiconductor 

DATA SHEET

The LND-FIL32-PKG

UP TO 48 CHANNEL VOLTAGE

MULTIPLEXER + BANDPASS FILTER

The LND-FIL309

Up to 48 Channel

Voltage Multiplexer

+ Bandpass Filter

What is the LND-FIL309?

The LND-FIL309 is an analog voltage multiplexer with up to 48 input channels, followed

by a pre-amp with pins for an external resistor to set gain. Digital logic inputs control

selection of the desired mux register. The mux can pass either AC or DC signals through

the selected line while simultaneously clamping all unused inputs to USEL. The mux

output is directly accessible, as is the output of the pre-amp. The centre frequency of

the bandpass filter is software adjustable. The output of the filter is buffered. The LND-

FIL309 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-FIL309

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.

To Adjust Center Frequency

Select MUX address 63, put 1 on the data lines, pull both M and D low. Changing the

value on the data lines and pulling M and D low again will set the center frequency. The

center frequency will move linearly with the value written. To write new values repeat

the process.

How Do I get samples?

The LND-FIL309 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.

Features

• Digitally select up to 48

input channels

• Clamps all unused

channels to external pin

• Select AC or DC voltages

• Standard logic voltage

operation

• Adjustable Bnadpass

Center Frequency

Applications

• Sensor Arrays

• Security Monitors

• Input Devices

• EmbeddedControllers

Linear Dimensions, Inc. 445 East Ohio Street, Chicago, IL 60611 p 312.3211810 f 312.321.1830

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