LM94021QBIMG/NOPB National Semiconductor, LM94021QBIMG/NOPB Datasheet - Page 11

• Manufacturer Part Number: LM94021QBIMG/NOPB
• Description: IC TEMP SENSOR ± 1.5°C TO ± 2.7°C SC70-5
• Manufacturer: National Semiconductor

Specifications of LM94021QBIMG/NOPB

• Ic Output Type: Voltage
• Sensing Accuracy Range: ± 2.7°C
• Supply Current: 13µA
• Supply Voltage Range: 1.5V To 5.5V
• Sensor Case Style: SC-70
• No. Of Pins: 5
• Msl: MSL 1 - Unlimited
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.0 APPLICATION CIRCUITS
20108618
FIGURE 4. Celsius Thermostat
20108619
FIGURE 5. Conserving Power Dissipation with Shutdown
20108628
Most CMOS ADCs found in microcontrollers and ASICs have a sampled data comparator input structure. When the ADC charges
the sampling cap, it requires instantaneous charge from the output of the analog source such as the LM94021 temperature sensor
and many op amps. This requirement is easily accommodated by the addition of a capacitor (C
). The size of C
depends
FILTER
FILTER
on the size of the sampling capacitor and the sampling frequency. Since not all ADCs have identical input stages, the charge
requirements will vary. This general ADC application is shown as an example only.
FIGURE 6. Suggested Connection to a Sampling Analog-to-Digital Converter Input Stage
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