LMV7231_14 Datasheet, PDF (1/22 Pages) Texas Instruments – LMV7231 Hex Window Comparator with 1.5% Precision and 400mV Reference

LMV7231
www.ti.com
SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013
LMV7231 Hex Window Comparator with 1.5% Precision and 400mV Reference
Check for Samples: LMV7231
FEATURES
1
•2 (For V_S = 3.3V ±10%, Typical Unless Otherwise
Noted)
• High Accuracy Voltage Reference: 400 mV
• Threshold Accuracy: ±1.5% (max)
• Wide Supply Voltage Range +2.2V to +5.5V
• Input/Output Voltage Range Above V+
• Internal Hysteresis: 6mV
• 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
APPLICATIONS
• Power Supply Voltage Detection
• Battery Monitoring
• Handheld Instruments
• Relay Driving
• Industrial Control Systems
DESCRIPTION
The LMV7231 is a 1.5% accurate Hex Window
Comparator which can be used to monitor power
supply voltages. The device uses an internal 400mV
reference for the comparator trip value. The
comparator set points can be set via external resistor
dividers. The LMV7231 has 6 outputs (CO1-CO6)
that signal an under-voltage or over-voltage event for
each power supply input. An output (AO) is also
provided to signal when any of the power supply
inputs have an over-voltage or under-voltage event.
This ability to signal an under-voltage or over-voltage
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 LMV7231’s +2.2V to +5.5V power supply voltage
range, low supply current, and input/output voltage
range above V+ make it 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.
Typical Application Circuit
Input = 9V - 42V
VIN
R1
115k
C1 C3
1.0 PF 0.1 PF
ON/OFF
RON/SD
RCL
R5
200k
RTN
LM25007
VCC
BST
C4
0.1PF
0.01 PF _{L1 100 PH}
C5
SW
R6
C6
D1 ^121k 2200
pF
C7
FB
0.01 PF
VOUT = 5V
R2
3k
C2
22 PF
R3
3k
Controller
(FPGA)
V+
R10
10k
CO1
V+
R11
10k
CO6
AOSEL
V+ R12
10k
AO
COPOL
*
*
V+ = 3.3V
C8
0.1 PF
+
-
+
-
Ch. 1
COPOL
UV1 OV1
*
* Open
Drain
RESERVED
UV6 OV6
OV1
OV2
OV3
OV4
OV5
OV6
UV1
UV2
UV3
UV4
UV5
UV6
GND
REF
Ch. 6
REF
REF
REF
LMV7231
+IN1
R7
1.15k
R8 C9
10
*optional
-IN1
R9
95.3
+IN6
-IN6
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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