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TMP01

Analog Devices
Part Number TMP01
Manufacturer Analog Devices
Description Low Power/ Programmable Temperature Controller
Published Apr 16, 2005
Detailed Description FEATURES −55°C to +125°C (−67°F to +257°F) operation ±1.0°C accuracy over temperature (typ) Temperature-proportional vol...
Datasheet PDF File TMP01 PDF File

TMP01
TMP01

Overview
FEATURES −55°C to +125°C (−67°F to +257°F) operation ±1.
0°C accuracy over temperature (typ) Temperature-proportional voltage output User-programmable temperature trip points User-programmable hysteresis 20 mA open-collector trip point outputs TTL/CMOS compatible Single-supply operation (4.
5 V to 13.
2 V) PDIP, SOIC, and TO-99 packages APPLICATIONS Over/under temperature sensor and alarm Board-level temperature sensing Temperature controllers Electronic thermostats Thermal protection HVAC systems Industrial process control Remote sensors GENERAL DESCRIPTION The TMP01 is a temperature sensor that generates a voltage output proportional to absolute temperature and a control signal from one of two outputs when the device is either above or below a specific temperature range.
Both the high/low temperature trip points and hysteresis (overshoot) band are determined by user-selected external resistors.
For high volume production, these resistors are available on board.
The TMP01 consists of a band gap voltage reference combined with a pair of matched comparators.
The reference provides both a constant 2.
5 V output and a voltage proportional to absolute temperature (VPTAT) which has a precise temperature coefficient of 5 mV/K and is 1.
49 V (nominal) at 25°C.
The comparators compare VPTAT with the externally set temperature trip points and generate an open-collector output signal when one of their respective thresholds has been exceeded.
Low Power Programmable Temperature Controller TMP01 FUNCTIONAL BLOCK DIAGRAM TEMPERATURE VREF 1 2.
5V SENSOR AND VOLTAGE SENSOR 8 V+ R1 REFERENCE SET 2 HIGH R2 SET 3 LOW WINDOW COMPARATOR 7 OVER 6 UNDER R3 GND 4 HYSTERESIS GENERATOR 5 VPTAT TMP01 Figure 1.
00333-001 Hysteresis is also programmed by the external resistor chain and is determined by the total current drawn out of the 2.
5 V reference.
This current is mirrored and used to generate a hysteresis offset voltage of the appropriate polarity after a comparator has been ...


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