LMP7300_15 Datasheet, PDF (1/30 Pages) Texas Instruments – Micropower Precision Comparator and Precision Reference

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LMP7300
SNOSAT7G – AUGUST 2007 – REVISED OCTOBER 2015
LMP7300 Micropower Precision Comparator and Precision Reference
With Adjustable Hysteresis
1 Features
•1 (For V_S = 5 V, typical unless otherwise noted)
• Supply Current 13 μA
• Propagation Delay 4 μs
• Input Offset Voltage 0.3 mV
• CMRR 100 dB
• PSRR 100 dB
• Positive and Negative Hysteresis Control
• Adjustable Hysteresis 1 mV/mV
• Reference Voltage 2.048 V
• Reference Voltage Accuracy 0.25%
• Reference Voltage Source Current 1 mA
• Wide Supply Voltage Range 2.7 V to 12 V
• Operating Temperature Range Ambient −40°C to
125°C
2 Applications
• Precision Threshold Detection
• Battery Monitoring
• Battery Management Systems
• Zero Crossing Detectors
3 Description
The LMP7300 is a combination comparator and
reference with ideal specifications for precision
threshold detecting. The precision 2.048-V reference
comes with a 0.25% maximum error. The comparator
features micropower (35 µW), low offset voltage
(0.75-mV maximum), and independent adjustable
positive and negative hysteresis.
Hysteresis control for the comparator is accomplished
through two external pins. The HYSTP pin sets the
positive hysteresis, and the HYSTN pin sets the
negative hysteresis. The comparator design isolates
the V_IN source impedance and the programmable
hysteresis components. This isolation prevents any
undesirable interaction allowing the IC to maintain a
precise threshold voltage during level detection.
The combination of low offset voltage, external
hysteresis control, and precision voltage reference
provides an easy-to-use micropower precision
threshold detector.
The LMP7300 open collector output is ideal for
mixed-voltage system designs. The output voltage
upper rail is unconstrained by V_CC and can be pulled
above V_CC to a maximum of 12 V. The LMP7300 is a
member of the LMP precision amplifier family.
R₁
318.4 k:
1%
R₂
1 M:
1%
Typical Application
V_BATT = (TRIP @ .9V x 3 CELL)
INP
INN
HYSTP
+
-
HYSTN
GND
0.1 PF
V⁺
OUT
V_REF
R_{5 ADJUST}
FOR LED
BRIGHTNESS
LED
R₃
9.86 k:
1%
R₄
1 M:
1%
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMP7300
VSSOP (8)
SOIC (8)
3.00 mm × 3.00 mm
3.91 mm × 4.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Propagation Delay vs Overdrive Voltage
30
V⁺ = 12V
25
C_L = 10 pF
20
15
10
-40°C
25°C
85°C
5
0
125°C
0
20
40
60
80 100
OVERDRIVE VOLTAGE (mV)
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.