5.3 Feature Description

TLV18x2-EP Family Options

The TLV18x2-EP family features 40V operation, micro-power 5µA supply currents, 420ns propagation delay, and

a Power-On Reset (POR) function.

The TLV1812-EP has a push-pull (sink-source) output.

The TLV1822-EP has a open-drain (sink only) output, capable of being pulled-up to any voltage up to 40V,

independent of comparator supply voltage.

5.4 Device Functional Modes

5.4.1 Inputs

5.4.1.1 TLV18x2-EP Rail-to-Rail Input

The TLV18x2-EP input voltage range extends from 200mV below V- to 200mV above V+. The differential input

voltage (VID) may be any voltage within these limits. No phase-inversion of the comparator output will occur

when the input voltages stay within the specified range.

For the TLV1812-EP, the inputs have ESD clamps to the V+supply line and therefore the input voltages must not

exceed the supply voltages by more than 200mV. It is not recommended to apply signals to the rail to rail inputs

with no supply voltage.

For the TLV1822-EP, the inputs do not have conventional ESD clamps to the V+ supply line.

5.4.1.2 ESD Protection

The TLV1822-EP open-drain output ESD protection consists of a snapback ESD clamp between the output and

V- to allow the output to be pulled above V+ to a maximum of 40V. There is a "lower" ESD clamp between V-

and the inputs. There is also a parasitic "upper" ESD soft-clamp diode between the input and V+ with a 5kΩ

equivalent resistance (as shown in Figure 5-2). They are not traditional ESD cells thus current must be limited

to 1mA or less across the this upper diode and resistance. External diode clamping is recommended if the input

voltage may exceed V+ during operation.

The TLV1812-EP push-pull output ESD protection contains a conventional diode-type "upper" ESD clamp

between the output and V+, and a "lower" ESD clamp between the output and V-. The output must not exceed

the supply rails by more than 200mV.

If the inputs are to be connected to a low impedance source, such as a power supply or buffered reference line,

TI recommends adding a current-limiting resistor in series with the input to limit any currents when the clamps

conduct. The current must be limited 10mA or less, though TI recommends limiting the current to 1mA or less.

This series resistance may be part of any resistive input dividers or networks.

5.4.1.3 Unused Inputs

If a channel is not to be used, DO NOT tie the inputs together. Due to the high equivalent bandwidth and low

offset voltage, tying the inputs directly together may cause high frequency chatter as the device triggers on it's

own internal wideband noise. Instead, the inputs must be tied to any available voltage that resides within the

specified input voltage range and provides a minimum of 50mV differential voltage. For example, one input can

be grounded and the other input connected to a reference voltage, or even V+ (as long as the input is directly

connected to the V+ pin to avoid transients).

5.4.2 Outputs

5.4.2.1 TLV1812-EP Push-Pull Output

The TLV1812-EP features a push-pull output stage capable of both sinking and sourcing current. This allows

driving loads such as LED's and MOSFET gates, as well as eliminating the need for a power-wasting external

pull-up resistor. The push-pull output must never be connected to another output.

TLV1812-EP, TLV1822-EP

SNOSDJ3 – MAY 2024

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