herunterladen
Controller
(FPGA)
+
-
+
-
Channel 1
UV
1
OV6
OV5
OV4
OV3
OV2
V+
OV1
+IN1
-IN1
GND
AO
CO1
*
*
COPOL
UV6
UV5
UV4
UV3
UV2
UV1
* Open Drain
AOSEL
*
OV1
Channel 6
+IN6
-IN6
CO6
+400mV
REF
LMV7231
COPOL
REF
UV6OV6
REF
Monitored Voltage #1
Monitored Voltage #6
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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.
LMV7231
SNOSB45F –FEBRUARY 2010–REVISED JANUARY 2016
LMV7231 Hex Window Comparator With 1.5% Precision and 400-mV Reference
1
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
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 3
- ・ Abmessungen des Paketumrisses on Seite 21 Seite 23 Seite 24
- ・ Markierungsinformationen on Seite 21
- ・ Blockdiagramm on Seite 12
- ・ Typisches Anwendungsschaltbild on Seite 1 Seite 17
- ・ Technische Daten on Seite 4 Seite 13
- ・ Anwendungsbereich on Seite 1 Seite 26
- ・ Elektrische Spezifikation on Seite 5 Seite 17 Seite 19
