MAX6676, MAX6677 Low-Voltage, 1.8kHz PWM Output Temperature Sensors

The MAX6676 MAX6677 are high-accuracy, low-power Temperature Sensors with a single-wire output. The MAX6676 MAX6677 convert the ambient temperature into a ratiometric PWM output with temperature information contained in the duty cycle of the output square wave. The MAX6676 has an open-drain output and the MAX6677 has a push-pull output.
The MAX6676 MAX6677 are specified for operation with power-supply voltages from 1.8V to 3.6V, or from 3.6V to 5.5V MAX6676 only). The typical unloaded supply current is 80A. All devices feature a single-wire output that minimizes the number of pins necessary to Interface with a Microprocessor (P). The output is a square wave with a nominal frequency of 1.8kHz (20%) at +25C. The output format is decoded as follows: Temperature (C) = 398.15 x (t1 / t2) - 273.15 Where t1 is fixed with a typical value of 0.24ms and t2 is modulated by the temperature. The MAX6676 MAX6677 operate from -40C to +125C and are available in space-saving 6-pin SOT23 packages.
By Maxim Integrated Products