LMV7231_16 Datasheet, PDF (1/26 Pages) Texas Instruments – Hex Window Comparator With 1.5% Precision and 400-mV Reference

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LMV7231
SNOSB45F – FEBRUARY 2010 – REVISED JANUARY 2016
LMV7231 Hex Window Comparator With 1.5% Precision and 400-mV Reference
1 Features
•1 (For V_S = 3.3 V ±10%, Typical Unless Otherwise
Noted)
• Undervoltage and Overvoltage Detection
• High Accuracy Voltage Reference: 400 mV
• Threshold Accuracy: ±1.5% (Maximum)
• Wide Supply Voltage Range 2.2 V to 5.5 V
• Input and Output Voltage Range Above V+
• Internal Hysteresis: 6 mV
• Propagation Delay: 2.6 µs to 5.6 µs
• Supply Current 7.7 µA Per Channel
• 24-Lead WQFN Package
• Temperature Range: –40°C to +125°C
2 Applications
• Power Supply Voltage Monitoring
• Battery Monitoring
• Handheld Instruments
• Relay Driving
• Industrial Control Systems
3 Description
The LMV7231 device is a 1.5% accurate Hex
Window Comparator which can be used to monitor
power supply voltages or any other analog output,
such as an analog temperature sensor or current-
sense amplifier. The device uses an internal 400-mV
reference for the comparator trip value. The
comparator set points can be set through external
resistor dividers. The LMV7231 has 6 outputs (CO1
to CO6) that signal an undervoltage or overvoltage
event for each power supply input. An output (AO) is
also provided to signal when any of the power supply
inputs have an overvoltage or undervoltage event.
This ability to signal an undervoltage or overvoltage
event for the individual power supply inputs, in
addition to an output to signal such an event on any
of the power supply inputs, adds unparalleled system
protection capability.
The 2.2-V to 5.5-V power supply voltage range, low
supply current, and input or output voltage range
above V+ make the LMV7231 ideal for a wide range
of power supply monitoring applications. Operation is
ensured over the –40°C to +125°C temperature
range. The device is available in a 24-pin WQFN
package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMV7231
WQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Typical Application
Monitored Voltage #1
V+
COPOL
Monitored Voltage #6
+IN1
-IN1
Channel 1
+
-
*
CO1
*
+
-
REF
OV1 UV1
+IN6
Channel 6
-IN6
REF
OV6 UV6
REF
+400mV
OV1
OV2
OV3
OV4
OV5
OV6
UV1
UV2
UV3
LMV7231 UV4
UV5
UV6
GND
COPOL
CO6
Controller
(FPGA)
AOSEL
AO
*
* Open Drain
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.