Literature Number: JAJA416
Expert tips, tricks, and techniques for powerful designs No. 13... 110 David Megaw, Design Engineer... REF REF Dn Dn1 Dn Dn Dn3 Dn1 D1 Dn Dn3 D1 ADC DAC Figure 1. ADC/DAC
national.com / JPN / power LM4030 0.05% 10ppm LM431 (ppm/ C) 100 75 50 NEW! LM4050 / 51 LM410 LM4030 / LM413 LM418 LM385, LM85 10 LM4140 0.05% 0.1% 0.5% 1.0% (%) NEW NEW NEW () (%) (ppm/ C) (µa) (µpp) 1.04, 1.5,.048, LM4140 (LDO).5, 4.096 0.1 3, 6, 10 30/1(). SO8 1.8,.0,.5, 3.0, LM413 (LDO) 3.3, 4.096 0.05, 0.1, 0., 0.4, 0.5 10, 0, 30 60/3 () 170 SOT35 LM4030.5, 4.096 0.05, 0.1, 0.15 10, 0, 30 10 100 SOT35 LM410 LM4050/51 LM418 (LDO) (LDO) 1.8,.048,.5, 3.0, 3.3, 4.09, 5 0., 0.5.0,.5, 4.096, 5.0, 8., 10 0.1, 0., 0.5 1.8,.0,.5, 3.0, 3.3, 4.096 0.1, 0., 0.5, 1 50 160/1() 0 SOT35 41 (LM4050) 50 39 (LM4051) 48 SOT33 75,100 60/3 () 170 SOT35 national.com / JPN / power National Semiconductor Corporation, 008. National Semiconductor, PowerWise, and are registered trademarks of National Semiconductor Corporation. All rights reserved.
IN IN IN I LOAD R BIAS I BIAS I LOAD IN GND REF C OUT REF I SHUNT C OUT REF IN BG Q 1 I LOAD R BIAS I BIAS I LOAD R 1 REF R 1 = BG (1 R ) R 1 = BG (1 ) I SHUNT REF R 1 R R C OUT R BG Q C OUT Figure. national.com/jpn/power 3
Table 1. 3 IN REF GND REF GND I Q I LOAD I LOAD_MAX IN / GND / IN IN PSRR / 3 T T T REF (T) = REF 1 TC TC TC... 5 C 1 5 C 3 5 C 5 C 4
TC TC BOX = 10 ENDPOINTS 6 = 10 6 REF_MAX T REF 5 C REF TMAX REF_MIN T REF 5 C T 1 T REF TMIN MAX T MAX MIN 1 T MIN REF MAX REF (TMAX) REF (5 o C) REF (TMAX) REF MAX REF (TMIN) REF (T MIN) REF MIN REF MIN T MIN 5 o C T MAX T MIN 5 o C T MAX T MIN 5 o C T MAX T APPLICATION T SPECIFICATION Figure 3. TC national.com/jpn/power 5
LOAD_REG(ppm/mA) = 10 6 REF ILOAD_MAX REF ILOAD_MIN REF ILOAD_MIN I LOAD_MAX 1 I LOAD_MIN 6
LINE_REG = 10 6 REF IN_MAX REF IN_MIN REF IN_MIN IN_MAX 1 IN_MIN national.com/jpn/power 7
6 1 LSB(ppm) = 10 NOB NOB : Table. LSB LSBppm 8 3906 10 977 1 44 14 61 16 15 8
TEMP = TC (TMAX TMIN) LOAD = LOAD_REG (ILOAD_MAX ILOAD_MIN) LINE = LINE_REG ( IN_MAX IN_MIN) = ERROR ERROR ERROR GUARANTEED INITIAL_ACCURACY TEMP LOAD LINE LM413A_.5: TEMP LOAD LINE o o o = (10 ppm/ C) (55 C 0 C) = 550 ppm = (10 ppm/ma) (0.5 ma 0 ma) = 60 ppm = (50 ppm/) (5.5 4.5) = 50 ppm GUARANTEED = (0.05% = 500 ppm) 550 ppm 60 ppm 50 ppm = 1160 ppm ERROR LM413A_.5: THERMAL _HYSTERESIS LONG TERM_STABI LITY LF_ NOISE TOT TOT 6 = 10 = THERMAL _HYSTERESIS LONG TERM_STABILITY 3 3 0.1 10 Hz Peak to Peak REF 3 (75 ppm) = 5 ppm 3 (50 ppm) = 150 ppm 6 40 μp P = 10 = 96 ppm.5 = 1160 ppm 5 ppm 150 ppm 96 ppm = 1631 ppm LF_ NOISE GUARANTEED THERMAL _HYSTERESIS LONG TERM_STABI LITY LF_NOISE national.com/jpn/power 9
1631 ppm TOTAL (LSB) = = 1.7 LSB (10 bit) = 6.7 LSB (1 bit) 6.7 LSB (14 bit) ppm LSB = log ERROR (LSB) (MS) = (PFS) = 0. 8 bit (10 bit) =.7 bits (1 bit) = 4.7 bits (14 bit) 0 bit (10 bit) TOTAL = 1.7 bits (1 bit) = 3.7 bits (14 bit) LM413A_.5: RMS = (550) (500) 760 ppm RMS (LSB) = ppm LSB = log (50) (60) (75) (50) ( 96) = 760 ppm ( ERROR (LSB)) PFS= 0 bit (10 bit) = 1.6 bits (1 bit) = MS= 0 bit (10 bit) = 0.6 bits (1 bit) = = 0.8 LSB (10 bit) = 3.1 LSB (1 bit) = 1.5 LSB (14 bit) TOTAL 3.6 bits (14 bit).6 bits (14 bit) 10
ref ref ref ref 10 11 11 00 k www.national.com/jpn/powerwise Analog Edge/ www.national.com/jpn/analogedge www.national.com/jpn/onlineseminar www.national.com/jpn jpn.feedback@nsc.com POWER designer Expert tips, tricks, and techniques for powerful designs No. 1... 17... Ricardo Capetillo, Application Engineer power.national.com/jpndesigner signalpath.national.com/jpndesigner No. 114 SIGNAL PATH designer Tips, tricks, and techniques from the analog signalpath experts...13, 5 PowerWise / A/D... 4... 6 /A/D Scott Kulchycki, Engineer, Ph. D. x(t) fs x(t) xs(kt) xs(t) 4T 5T 6T 4T 5T 6T T T 3T T T 3T Figure 1: / n x D[k] x D[k] 1 3 4 5 6 01 01 ADC 008, National Semiconductor Corporation. National Semiconductor,, PowerWise, and Signal Path Designer are registered trademarks and Analog Edge is a service mark of National Semiconductor. All other brand or product names are trademarks or registered trademarks of their respective holders. All rights reserved. 55063019JP
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