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+
-
INP
INN
HYSTP
HYSTN
OUT
0.1 PF
R
1
318.4 k:
1%
GND
V
+
V
REF
V
BATT
= (TRIP @ .9V x 3 CELL)
R
3
9.86 k:
1%
R
4
1 M:
1%
R
2
1 M:
1%
R
5
LED
ADJUST
FOR LED
BRIGHTNESS
0 20 40 60 80 100
0
5
10
15
20
25
30
PROPAGATION DELAY (Ps)
OVERDRIVE VOLTAGE (mV)
-40°C
25°C
85°C
125°C
V
+
= 12V
C
L
= 10 pF
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LMP7300
SNOSAT7G –AUGUST 2007–REVISED OCTOBER 2015
LMP7300 Micropower Precision Comparator and Precision Reference
With Adjustable Hysteresis
1 Features 3 Description
The LMP7300 is a combination comparator and
1
• (For V
S
= 5 V, typical unless otherwise noted)
reference with ideal specifications for precision
• Supply Current 13 μA
threshold detecting. The precision 2.048-V reference
• Propagation Delay 4 μs
comes with a 0.25% maximum error. The comparator
features micropower (35 µW), low offset voltage
• Input Offset Voltage 0.3 mV
(0.75-mV maximum), and independent adjustable
• CMRR 100 dB
positive and negative hysteresis.
• PSRR 100 dB
Hysteresis control for the comparator is accomplished
• Positive and Negative Hysteresis Control
through two external pins. The HYSTP pin sets the
• Adjustable Hysteresis 1 mV/mV
positive hysteresis, and the HYSTN pin sets the
negative hysteresis. The comparator design isolates
• Reference Voltage 2.048 V
the V
IN
source impedance and the programmable
• Reference Voltage Accuracy 0.25%
hysteresis components. This isolation prevents any
• Reference Voltage Source Current 1 mA
undesirable interaction allowing the IC to maintain a
• Wide Supply Voltage Range 2.7 V to 12 V
precise threshold voltage during level detection.
• Operating Temperature Range Ambient −40°C to
The combination of low offset voltage, external
125°C
hysteresis control, and precision voltage reference
provides an easy-to-use micropower precision
2 Applications
threshold detector.
• Precision Threshold Detection
The LMP7300 open collector output is ideal for
mixed-voltage system designs. The output voltage
• Battery Monitoring
upper rail is unconstrained by V
CC
and can be pulled
• Battery Management Systems
above V
CC
to a maximum of 12 V. The LMP7300 is a
• Zero Crossing Detectors
member of the LMP precision amplifier family.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
VSSOP (8) 3.00 mm × 3.00 mm
LMP7300
SOIC (8) 3.91 mm × 4.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
Propagation Delay vs Overdrive Voltage
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.
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