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TLV9022-Q1 Datasheet(PDF) 10 Page - Texas Instruments

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Part # TLV9022-Q1
Description  TLV902x-Q1 and TLV903x-Q1 Precision Dual and Quad Automotive Comparators
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLV9022-Q1 Datasheet(HTML) 10 Page - Texas Instruments

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t
ON
V
OH/2
GND
OUT
VCC
GND + 1.5V
GND
10
TLV9022-Q1, TLV9032-Q1
SNOSDA9 – JUNE 2020
www.ti.com
Product Folder Links: TLV9022-Q1 TLV9032-Q1
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
Device Functional Modes (continued)
7.4.1.2 TLV9032-Q1 and TLV9034-Q1 Push-Pull Output
The TLV903x-Q1 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.
Unused push-pull outputs should be left floating, and never tied to a supply, ground, or another output. While an
individual output can typically sink and source up to 100mA, the total combined current for all channels must be
less than 200 mA.
7.4.2 Power-On Reset (POR)
The TLV90xx-Q1 has an internal Power-on-Reset (POR) circuit for known start-up or power-down conditions.
While the power supply (VCC) is ramping up or ramping down, the POR circuitry will be activated for up to 30µs
after the minimum supply voltage threshold of 1.5V is crossed, or immediately when the supply voltage drops
below 1.5V. When the supply voltage is equal to or greater than the minimum supply voltage, and after the delay
period, the comparator output reflects the state of the differential input (VID).
The POR circuit will keep the output high impedance (HI-Z) during the POR period (ton).
Figure 1. Power-On Reset Timing Diagram
Note that it the nature of an open collector output that the output will rise with the pull-up voltage during the POR
period.
For the TL903x-Q1 push-pull output devices, the output is "floating" during the POR period. A light pull-up (to
VCC) or pull-down (to GND) resistor can be used to pre-bias the output condition to prevent the output from
floating. If output high is the desired start-up condition, then use the open collector TL902x-Q1, since a pull-up
resistor is already required.
7.4.3 Inputs
7.4.3.1 Rail to Rail Input
The TLV90xx-Q1 input voltage range extends from 200mV below GND to 200 mV above VCC. The differential
input voltage (VID) can be any voltage within these limits. No phase-inversion of the comparator output will occur
when the input pins exceed VCC and GND.
7.4.3.2 Fault Tolerant Inputs
The TLV90xx-Q1 inputs are fault tolerant up to 5.5V independent of VCC. Fault tolerant is defined as maintaining
the same high input impedance when VCC is unpowered or within the recommended operating ranges.
The fault tolerant inputs can be any value between 0 V and 5.5 V, even while VCC is zero or ramping up or down.
This feature avoids power sequencing issues as long as the input voltage range and supply voltage are within
the specified ranges. This is possible since the inputs are not clamped to VCC and the input current maintains its
value even when a higher voltage is applied to the inputs.
As long as one of the input pins remains within the valid input range, and the supply voltage is valid and not in
POR, the output state will be correct.
The following is a summary of input voltage excursions and their outcomes:
1. When both IN- and IN+ are within the specified input voltage range:
a. If IN- is higher than IN+ and the offset voltage, the output is low.


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