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TLV7011, TLV7021, TLV7012, TLV7022

SLVSDM5F – SEPTEMBER 2017 – REVISED MARCH 2020

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Product Folder Links: TLV7011 TLV7021 TLV7012 TLV7022

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Device Functional Modes (continued)

While TI recommends operating the TLV701x and TLV702x within the specified common-mode range, the inputs

are fault tolerant to voltages up to 5.5 V independent of the applied VCC value. Fault tolerant is defined as

maintaining the same high input impedance when VCC is unpowered or within the recommended operating range.

Because the inputs of the TLV701x and TLV702x are fault tolerant, the inputs to the comparator can be any

value between 0 V and 5.5 V while VCC is ramping up. This feature allows any supply and input driven sequence

as long as the input value and supply are within the specified ranges. In this case, no current limiting resistor is

required. This is possible since the VCC is isolated from the inputs such that it maintains its value even when a

higher voltage is applied to the input.

The input bias current is typically 1 pA for input voltages between VCC and VEE. The comparator inputs are

protected from undervoltage by internal diodes connected to VEE. As the input voltage goes under VEE, the

protection diodes become forward biased and begin to conduct causing the input bias current to increase

exponentially. Input bias current typically doubles for 10°C temperature increases.

7.4.2 Internal Hysteresis

The device hysteresis transfer curve is shown in Figure 32. This curve is a function of three components: VTH,

VOS, and VHYST:

•

VTH is the actual set voltage or threshold trip voltage.

•

VOS is the internal offset voltage between VIN+ and VIN–. This voltage is added to VTH to form the actual trip

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

•

VHYST is the internal hysteresis (or trip window) that is designed to reduce comparator sensitivity to noise

(4.2 mV for the TLV7011).

Figure 32. Hysteresis Transfer Curve

7.4.3 Output

The TLV701x feature a push-pull output stage eliminating the need for an external pull-up resistor. On the other

hand, the TLV702x feature an open-drain output stage enabling the output logic levels to be pulled up to an

external source independent of the supply voltage.

TLV7021 Datasheet(PDF) 16 Page - Texas Instruments

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