SOT Temperature Sensors with Period/Frequency Output

The MAX6576/MAX6577 are low-cost, low-current temperature sensors with a single-wire output. The MAX6576 converts the ambient temperature into a square wave with a period proportional to absolute temperature (°K). The MAX6577 converts the ambient temperature into a square wave with a frequency proportional to absolute temperature. The MAX6576 offers accuracy of ±3°C at +25°C, ±4.5°C at +85°C, and ±5°C at +125°C. The MAX6577 offers accuracy of ±3°C at +25°C, ±3.5°C at +85°C, and ±4.5°C at +125°C.

Both devices feature a single-wire output that minimizes the number of pins necessary to interface with a microprocessor. The period/frequency range of the output square wave can be selected by hard-wiring the two time-select pins (TS0, TS1) to either VDD or GND. The MAX6576/MAX6577 are available in space-saving 6-pin SOT23 packages.

Applications

* Battery Packs * Cell Phones * Critical µP and µC Temperature Monitoring * Hard Drives/Tape Drives * Medical Equipment * Networking and Telecom Equipment * Portable Battery-Powered Equipment

* Simple Single-Wire Output

* Two Output Types Available

* Temperature to Period (µs) (MAX6576)

* Temperature to Frequency (Hz) (MAX6577)

* ±0.8°C Accuracy at +25°C (±3°C max)

* No External Components

* Operates from +2.7V to +5.5V Supply Voltage

* Low 140µA Typical Supply Current

* Standard Operating Temperature Range: -40°C to +125°C

* Small 6-Pin SOT23 Package