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LM4030 Fiches technique(PDF) 12 Page - Texas Instruments

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No de pièce LM4030
Description  LM4030 SOT-23 Ultra-High Precision Shunt Voltage Reference
Download  20 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

LM4030 Fiches technique(HTML) 12 Page - Texas Instruments

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x 0.1
VREF
= Percent_Error
VERROR
x 10
3
VREF
= ppmERROR
VERROR
x 10
3
VREF
2
n
= VERROR
LM4030
SNVS552B – MARCH 2008 – REVISED APRIL 2013
www.ti.com
Bit error (1 bit) to voltage error (mV):
(5)
VREF is in volts (V), VERROR is in milli-volts (mV), and n is the number of bits.
mV to ppm error in output voltage:
where
VREF is in volts (V) and VERROR is in milli-volts (mV)
(6)
Voltage error (mV) to percentage error (percent):
where
VREF is in volts (V) and VERROR is in milli-volts (mV)
(7)
PRINTED CIRCUIT BOARD and LAYOUT CONSIDERATIONS
The LM4030 has a very small change in reverse voltage with current (25ppm/mA typical) so large variations in
load current (up to 50mA) should not appreciably shift VREF. Parasitic resistance between the LM4030 and the
load introduces a voltage drop proportional to load current and should be minimized. The LM4030 should be
placed as close to the load it is driving as the layout will allow. The location of RZ is not important, but COUT
should be as close to the LM4030 as possible so added ESR does not degrade the transient performance.
12
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Product Folder Links: LM4030


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