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Nanopower Comparators
Micropower Comparators

TP1946 - 1.8V Micropower, RRIO, Open-Drain Output, Dual Comparators


 Down to 1.8V Supply Voltage: 1.8V to 5.5V
 Low Supply Current: 49 μA per Channel
 High-to-Low Propagation Delay: 70 ns
 Offset Voltage: ±3.0 mV Maximum
 Offset Voltage Temperature Drift: 0.3 μV/°C
 Input Bias Current: 6 pA Typical
 Input Common-Mode Range Extends 200 mV
 Internal Hysteresis Ensures Clean Switching
 No Phase Reversal for Overdriven Inputs
 Open-Drain Output for Maximum Flexibility
 Green, Space-Saving SC70 Package Available

Typical Application

Typical Application of the TP1945/6/8 Comparators 


The 3PEAK TP194x single/dual/quad micropower comparators feature rail-to-rail inputs and outputs, and fully specified single-supply operation down to +1.8V. The devices draw only 49μA per comparator while reaching 70ns high-to-low response time, and have open-drain outputs that can be pulled beyond V– to 6V (max) above ground for maximum flexibility. In addition, their rail-to-rail input common-mode voltage range makes these comparators suitable for ultra-low-voltage operation. The input commonmode voltage range extends 200mV below ground and 200mV above supply, allowing both ground and supply sensing. The internal input hysteresis eliminates output switching due to internal input noise voltage, reducing current draw.

A +1.8V to +5.5V single-supply operating voltage range makes the TP194x family of comparators ideal for 2-cell battery-powered applications.

The TP1945 single comparator is available in tiny SC70 package for space-conservative designs. All chips are specified for the temperature range of –40°C to +85°C.


 Threshold Detectors/Discriminators

 Sensing at Ground or Supply Line
 Peak and Zero-crossing Detectors
 Logic Level Shifting or Translation
 Window Comparators
 IR Receivers
 Clock and Data Signal Restoration
 Telecom, Portable Communications
 Portable and Battery Powered Systems

Application Notes
3PEAK_Selection Guide