Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM94022/LM94022Q 1.5V, SC70, Multi-Gain Analog Temperature Sensor with Class-AB Output |
989
Kbytes |
17-Mar-09 |
Download |
LM94022/LM94022Q 1.5V, SC70, Multi-Gain Analog Temperature Sensor with Class-AB Output (Japanese)
 |
757 Kbytes |
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Package Availability, Models, Samples & Pricing
General Description
The LM94022 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low
as 1.5 Volts. A class-AB output structure gives the LM94022 strong output source and sink current capability for driving
heavy loads. For example, it is well suited to source the input of a sample-and-hold analog-to-digital converter with its
transient load requirements. While operating over the wide temperature range of −50°C to +150°C, the LM94022 delivers an output
voltage that is inversely porportional to measured temperature. The LM94022's low supply current makes it ideal for battery-powered
systems as well as general temperature sensing applications.
Two logic inputs, Gain Select 1 (GS1) and Gain Select 0 (GS0), select the gain of the temperature-to-voltage output transfer
function. Four slopes are selectable: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. In the lowest gain configuration
(GS1 and GS0 both tied low), the LM94022 can operate with a 1.5V supply while measuring temperature over the full −50°C to
+150°C operating range. Tying both inputs high causes the transfer function to have the largest gain of −13.6 mV/°C 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) |
|
LM94022BIMG | CMOS7 | 0 | 18406 | 0 | 0 | 1089000 | 4 | 309006723
|
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LM94022BIMGX | CMOS7 | 0 | 18406 | 0 | 0 | 1089000 | 4 | 309006723
|
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LM94022QBIMG | 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 7-Nov-2009]
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