TLV7031 datasheet(19/69 Pages) TI2

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7 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

7.1 Application Information

The TLV703x and TLV704x are nano-power comparators with reasonable response time. The comparators have

a rail-to-rail input stage with integrated hysteresis that can monitor signals beyond the positive supply rail. When

higher levels of hysteresis are required, positive feedback can be externally added. The push-pull output stage

of the TLV703x is an excellent choice for reduced power budget applications and features no shoot-through

current. When level shifting or wire-ORing of the comparator outputs is needed, the TLV704x with open-drain

output stage is well suited to meet the system needs. In either case, the wide operating voltage range, low

quiescent current, and small size of the TLV703x and TLV704x make these comparators excellent candidates for

battery-operated and portable, handheld designs.

7.1.1 Inverting Comparator With Hysteresis for TLV703x

The inverting comparator with hysteresis requires a three-resistor network that is referenced to the comparator

supply voltage (VCC), as shown in Figure 7-1. When VIN at the inverting input is less than VA, the output voltage

is high (for simplicity, assume VO switches as high as VCC). The three network resistors can be represented as

R1 || R3 in series with R2. Equation 1 defines the high-to-low trip voltage (VA1).

= V

(R1 || R3) + R2

(1)

When VIN is greater than VA, the output voltage is low, very close to ground. In this case, the three network

resistors can be presented as R2 || R3 in series with R1. Use Equation 2 to define the low to high trip voltage

(VA2).

= V

R2 || R3

R1 + (R2 || R3)

(2)

Equation 3 defines the total hysteresis provided by the network.

V = V

(3)

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TLV7031, TLV7032, TLV7041, TLV7042, TLV7034, TLV7044

SLVSE13J – SEPTEMBER 2017 – REVISED NOVEMBER 2024

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TLV7031 Datasheet(PDF) 19 Page - Texas Instruments