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LM4132AMF-4.1 Datasheet

  • LM4132AMF-4.1

  • SOT-23 Precision Low Dropout Voltage Reference

  • 860.50KB

  • 15页

  • NSC

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LM4132
Application Information
(Continued)
T
D
= Temperature drift
V
REF
= Nominal preset output voltage
V
REF_MIN
= Minimum output voltage over operating
temperature range
V
REF_MAX
= Maximum output voltage over operating
temperature range
鈭員
= Operating temperature range.
The LM4132 features a low temperature drift of 10ppm
(max) to 30ppm (max), depending on the grade.
LONG TERM STABILITY
Long-term stability refers to the fluctuation in output voltage
over a long period of time (1000 hours). The LM4132 fea-
tures a typical long-term stability of 50ppm over 1000 hours.
The measurements are made using 5 units of each voltage
option, at a nominal input voltage (5V), with no load, at room
temperature.
EXPRESSION OF ELECTRICAL CHARACTERISTICS
Electrical characteristics are typically expressed in mV, ppm,
or a percentage of the nominal value. Depending on the
application, one expression may be more useful than the
other. To convert one quantity to the other one may apply the
following:
ppm to mV error in output voltage:
Where:
V
REF
is in volts (V) and V
ERROR
is in milli-volts (mV).
Voltage error (mV) to percentage error (percent):
Where:
V
REF
is in volts (V) and V
ERROR
is in milli-volts (mV).
PRINTED CIRCUIT BOARD and LAYOUT
CONSIDERATIONS
References in SOT packages are generally less prone to PC
board mounting than devices in Small Outline (SOIC) pack-
ages. To minimize the mechanical stress due to PC board
mounting that can cause the output voltage to shift from its
initial value, mount the reference on a low flex area of the PC
board, such as near the edge or a corner.
The part may be isolated mechanically by cutting a U shape
slot on the PCB for mounting the device. This approach also
provides some thermal isolation from the rest of the circuit.
Bypass capacitors must be mounted close to the part.
Mounting bypass capacitors close to the part will reduce the
parasitic trace components thereby improving performance.
Where:
V
REF
is in volts (V) and V
ERROR
is in milli-volts (mV).
Bit error (1 bit) to voltage error (mV):
V
REF
is in volts (V), V
ERROR
is in milli-volts (mV), and n is the
number of bits.
mV to ppm error in output voltage:
www.national.com
12

LM4132AMF-4.1 产品属性

  • National Semiconductor (TI)

  • Voltage References

  • Series References

  • Precision

  • 4.096 V

  • 0.05 %

  • 10 PPM/C

  • 6 V

  • 20 mA

  • + 125 C

  • SOT-23

  • Reel

  • - 40 C

  • SMD/SMT

  • 1000

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