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LMP7300_14

更新时间： 2024-11-05 02:58:39
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德州仪器 - TI /
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17页 270K
描述
Micropower Precision Comparator and Precision Reference with Adjustable Hysteresis

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LMP7300_14 数据手册

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LMP7300  
www.ti.com  
SNOSAT7F –AUGUST 2007–REVISED MARCH 2013  
Micropower Precision Comparator and Precision Reference with Adjustable Hysteresis  
Check for Samples: LMP7300  
1
FEATURES  
DESCRIPTION  
The LMP7300 is a combination comparator and  
reference with ideal specifications for precision  
threshold detecting. The precision 2.048V reference  
comes with a 0.25% maximum error. The comparator  
features micropower (35 µW), low offset voltage  
(0.75 mV max), and independent adjustable positive  
and negative hysteresis.  
2
•
(For VS = 5V, typical unless otherwise noted)  
Supply Current 13 μA  
•
•
•
•
•
•
•
•
•
•
•
•
Propagation Delay 4 μs  
Input Offset Voltage 0.3 mV  
CMRR 100 dB  
PSRR 100 dB  
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 VIN 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.  
Positive and Negative Hysteresis Control  
Adjustable Hysteresis 1 mV/mV  
Reference Voltage 2.048V  
Reference Voltage Accuracy 0.25%  
Reference Voltage Source Current 1 mA  
Wide Supply Voltage Range 2.7V to 12V  
Operating Temperature Range Ambient −40°C  
to 125°C  
The combination of low offset voltage, external  
hysteresis control, and precision voltage reference  
provides an easy to use micropower precision  
threshold detector.  
APPLICATIONS  
The LMP7300 open collector output makes it ideal for  
mixed voltage system designs. The output voltage  
upper rail is unconstrained by VCC and can be pulled  
above VCC to a maximum of 12V. The LMP7300 is a  
member of the LMP precision amplifier family.  
•
•
•
•
Precision Threshold Detection  
Battery Monitoring  
Battery Management Systems  
Zero Crossing Detectors  
Typical Application  
Micropower Precision Battery Low Voltage Detector for 3  
Cell Discharge Voltage  
30  
V
= (TRIP @ .9V x 3 CELL)  
BATT  
+
V
C
= 12V  
= 10 pF  
25  
20  
15  
10  
5
L
R
5
0.1 mF  
ADJUST  
R
1
FOR LED  
BRIGHTNESS  
318.4 kW  
+
1%  
V
INP  
INN  
HYSTP  
LED  
+
-
R
2
1 MW  
1%  
OUT  
HYSTN  
V
REF  
-40°C  
25°C  
GND  
85°C  
R
3
9.86 kW  
1%  
125°C  
20  
0
0
40  
60  
80  
100  
R
1 MW  
4
OVERDRIVE VOLTAGE (mV)  
1%  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
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.  
Copyright © 2007–2013, Texas Instruments Incorporated  
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