DESCRIPTION

The LM94023 is a precision analog output CMOSintegrated-circuit temperature sensor that operates ata supply voltage as low as 1.5 Volts. Available in thevery small four-bump DSBGA 0.8mm x 0.8mm) theLM94023 occupies very little board area. A class-ABoutput structure gives the LM94023 strong outputsource and sink current capability for driving heavyloads, making it well suited to source the input of asample-and-hold analog-to-digital converter with itstransient load requirements, This generally means the_M94023 can be used without external components.like resistors and buffers, on the output. Whileoperating over the wide temperature range of -50°Cto +150°C the LM94023 delivers an output voltagethat isinversely porportional to measuredtemperature. The LM94023's low supply currentmakes it ideal for battery-powered systems as well asgeneral temperature sensing applications.A Gain Select (GS) pin sets the gain of thetemperature-to-voltage output transfer function. Eitherof two slopes are selectable: -5.5 mV°C (GS=0) o8.2 mV/°C (GS=1). In the lowest gain configuration.the LM94023 can operate with a 1.5V supply whilemeasuring temperature over the full -50°C to +150°Coperating range. Tying GS high causes the transferfunction to have the largest gain for maximumtemperature sensitivity. The gain-select inputs can betied directly to Vop or Ground without any pull-up orpull-down resistors, reducing component count andboard area. These inputs can also be driven by logicsignals allowing the system to optimize the gainduring operation or system diagnostics.

FEATURES

Low 1.5V Operation

Push-pull Output with 50pA Source CurrentCapability

Two Selectable Gains

Very Accurate Over Wide Temperature Rangeof -50°C to +150°C

Low Quiescent Current

Output is Short-circuit ProtectedExtremely Small DSBGA PackageFootprint Compatible with the Industrystandard LM20 Temperature Sensor

APPLICATIONS

Cell Phones

Wireless Transceivers

Battery ManagementAutomotive

Disk Drives

Games

Appliances