V

+ V

(V

-

TH

OS

HYST

)

/ 2

V

+ V

TH

OS

V

+ V

+

TH

OS

(V

HYST

)

/ 2

Time (2 ms/div)

Output Voltage

Input Voltage

C030

TLV3691

SBOS694 – DECEMBER 2013

www.ti.com

APPLICATION INFORMATION

The TLV3691 comparators feature rail-to-rail inputs and outputs on supply voltages as low as 0.9 V. The push-

pull output stage is optimal for reduced power budget applications and features no shoot-through current. Low

minimum supply voltages, common-mode input range beyond supply rails, and a typical supply current of 75 nA

make the TLV3691 an excellent candidate for battery-operated and portable, handheld designs.

COMPARATOR INPUTS

The TLV3691 is a rail-to-rail input comparator, with an input common-mode range that exceeds the supply rails

by 100 mV for both positive and negative supplies. The device is designed to prevent phase inversion when the

input pins exceed the supply voltage. Figure 27 shows the device response when input voltages exceed the

supply, resulting in no phase inversion.

Figure 27. No Phase Inversion: Comparator Response to Input Voltage (Propagation Delay Included)

EXTERNAL HYSTERESIS

•

•

point at which the comparator must respond in order to change output states.

•

(17 mV for the TLV3691).

Figure 28. Hysteresis Transfer Curve

10

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