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102299

FEATURES

§ Factory calibrated for sensitivity of +6.20

mV/°C and thermometer accuracy of ±2.0°C

over the 0°C to 85°C range and ±3°C over the

40°C to 0°C and +85°C to +125°C range

§ Measurement range of -40°C to +125°C

§ Integrated temperature sensor and voltage

reference

§ Two independent temperature setpoints with

respective logic outputs with set hysteresis

§ Narrow-body SO8 (150-mil) package

§ Wide power supply range (2.7V

≤V

DD

≤

5.5V)

§ Functionally compatible with LM56xIM

§ Applications include monitoring disk drives,

printers, office equipment, HVAC,

appliances, or any power/cost/temperature-

sensitive environments.

PIN ASSIGNMENT

PIN DESCRIPTION

- Bandgap Voltage Reference

Output

- Temperature Trip Point 2

- Temperature Trip Point 1

GND

- Ground

- Temp Sensor Output Voltage

- Thermostat output for Trip

Point 2

- Thermostat output for Trip

Point 1

- Power Supply Voltage (2.7V

to 5.5V)

DESCRIPTION

The DS56 Dual Temperature Comparator has two independent open-drain thermostat outputs and

respective trip point inputs. The trip points are set with external resistors that divide down the 1.25V

internal bandgap voltage reference. The voltage resulting from this resistive division is compared with the

voltage corresponding to the device’s junction temperature to define the thermostat output logic state. The

internal temperature sensor has a typical sensitivity of +6.2mV/°C and DC offset of +395 mV at 0°C.

Both thermostat outputs have 5°C of hysteresis.

For applications that require temperature measurement as well as control, the temperature sensor voltage

is brought out to a pin.

The DS56 is packaged in a compact 150-mil, 8-pin SOIC. Applications include disk drives, printers,

office equipment, HVAC, appliances, or any power/cost/temperature-sensitive environments.

DS56

Dual Temperature Comparator

PRELIMINARY

www.dalsemi.com

1

2

3

4

8

7

6

5

GND

DS56S 8-Pin SOIC (150-mil)