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LM4050AIM3X-2.5 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer LM4050AIM3X-2.5
Beschreibung Precision Micropower Shunt Voltage Reference
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 14 Seiten
LM4050AIM3X-2.5 Datasheet, Funktion
May 2000
LM4050
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4050 precision
voltage reference is available in the sub-miniature (3 mm x
1.3 mm) SSOT-23 surface-mount package. The LM4050’s
design eliminates the need for an external stabilizing capaci-
tor while ensuring stability with any capacitive load, thus
making the LM4050 easy to use. Further reducing design ef-
fort is the availability of several fixed reverse breakdown volt-
ages: 2.500V, 4.096V, 5.000V, 8.192V, and 10.000V. The
minimum operating current increases from 60 µA for the
LM4050-2.5 to 100 µA for the LM4050-10.0. All versions
have a maximum operating current of 15 mA.
The LM4050 utilizes fuse and zener-zap reverse breakdown
voltage trim during wafer sort to ensure that the prime parts
have an accuracy of better than ±0.1% (A grade) at 25˚C.
Bandgap reference temperature drift curvature correction
and low dynamic impedance ensure stable reverse break-
down voltage accuracy over a wide range of operating tem-
peratures and currents.
All grades and voltage options of the LM4050 operate be-
tween −40˚C and +85˚C. Selected parts can operate in the
extended temperature range, from −40˚C and +125˚C.
Features
n Small packages: SSOT-23
n No output capacitor required
n Tolerates capacitive loads
n Fixed reverse breakdown voltages of 2.500V, 4.096V,
5.000V, 8.192V, and 10.000V
Key Specifications (LM4050-2.5)
n Output voltage tolerance
(A grade, 25˚C)
n Low output noise
(10 Hz to 10 kHz)
n Wide operating current range
n Industrial temperature range
n Extended temperature range
n Low temperature coefficient
±0.1% (max)
41 µVrms(typ)
60 µA to 15 mA
−40˚C to +85˚C
−40˚C to +125˚C
50 ppm/˚C (max)
Applications
n Portable, Battery-Powered Equipment
n Data Acquisition Systems
n Instrumentation
n Process Control
n Energy Management
n Product Testing
n Automotive
n Precision Audio Components
Connection Diagrams
SSOT-23
*This pin must be left floating or connected to pin 2.
DS101045-1
Top View
See NS Package Number MF03A
© 2000 National Semiconductor Corporation DS101045
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LM4050AIM3X-2.5 Datasheet, Funktion
LM4050-8.2
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for
verse Breakdown Voltage
TA = TJ =
tolerances
oTfM±IN0.t1o%TaMnAdX;±a0ll.2o%thearnldim0it.s5%TAre=spTeJc=tiv2e5ly˚.C.
The
grades
A,
B
and
C
designate
initial
Re-
Symbol
Parameter
Conditions
VR
IRMIN
Reverse Breakdown
Voltage
IR = 150 µA
Reverse Breakdown
IR = 150 µA
Voltage Tolerance (Note 7)
Minimum Operating Current
VR/T Average Reverse
Breakdown Voltage
Temperature
Coefficient(Note 7)
IR = 10 mA
IR = 1 mA
IR = 150 µA
VR/IR Reverse Breakdown
Voltage Change with
Operating Current Change
(Note 8)
IRMIN IR 1 mA
1 mA IR 15 mA
ZR
eN
VR
VHYST
Reverse Dynamic
Impedance
Wideband Noise
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
IR = 150 µA
10 Hz f 10 kHz
Reverse Breakdown
t = 1000 hrs
Voltage Long Term Stability T = 25˚C ±0.1˚C
Output Hysteresis
IR = 150 µA
T = −40˚C to 125˚C
LM4050AIM3 LM4050BIM3 LM4050CIM3
Typical
(Note 5)
Limits
Limits
Limits
(Note 6)
(Note 6)
(Note 6)
8.192
±8.2 ±16 ±41
±35 ±43 ±68
74
91 91 91
95 95 95
±40
±20
±20 ±50 ±50 ±50
0.6
1.3 1.3 1.3
2.5 2.5 2.5
7.0
10.0 10.0 10.0
18.0 18.0 18.0
0.6
150
120
2.3
Units
(Limit)
V
mV (max)
mV (max)
µA
µA (max)
µA (max)
ppm/˚C
ppm/˚C
ppm/˚C
(max)
mV
mV (max)
mV (max)
mV
mV (max)
mV (max)
µVrms
ppm
mV
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LM4050AIM3X-2.5 pdf, datenblatt
Typical Applications (Continued)
DS101045-17
FIGURE 3. Bounded amplifier reduces saturation-induced delays and can prevent succeeding stage damage.
Nominal clamping voltage is ±11.5V (LM4050’s reverse breakdown voltage +2 diode VF).
DS101045-18
FIGURE 4. Protecting Op Amp input. The bounding voltage is ±4V with the LM4050-2.5
(LM4050’s reverse breakdown voltage + 3 diode VF).
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