Datasheet
Package Availability, Models, Samples & Pricing
General Description
The LM94023 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low
as 1.5 Volts. Available in the very small four-bump microSMD 0.8mm x 0.8mm) the LM94023 occupies very little board area.
A class-AB output structure gives the LM94023 strong output source and sink current capability for driving heavy loads, making
it well suited to source the input of a sample-and-hold analog-to-digital converter with its transient load requirements,
This generally means the LM94023 can be used without external components, like resistors and buffers, on the output. While
operating over the wide temperature range of −50°C to +150°C, the LM94023 delivers an output voltage that is inversely porportional
to measured temperature. The LM94023's low supply current makes it ideal for battery-powered systems as well as general
temperature sensing applications.
A Gain Select (GS) pin sets the gain of the temperature-to-voltage output transfer function. Either of two slopes are
selectable: −5.5 mV/°C (GS=0) or −8.2 mV/°C (GS=1). In the lowest gain configuration, the LM94023 can operate with a 1.5V
supply while measuring temperature over the full −50°C to +150°C operating range. Tying GS high causes the transfer function
to have the largest gain for maximum temperature sensitivity. The gain-select inputs can be tied directly to VDD or Ground without any pull-up or pull-down resistors, reducing component count and board area. These inputs can also be
driven by logic signals allowing the system to optimize the gain during operation or system diagnostics.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM94023BITME | CMOS7 | 0 | 18406 | 0 | 0 | 1089000 | 4 | 309006723
|
|
LM94023BITMX | CMOS7 | 0 | 18406 | 0 | 0 | 1089000 | 4 | 309006723
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
[Information as of 4-Nov-2009]
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RoHS Compliance Information
