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ADN8831-EVALZ Datasheet(PDF) 3 Page - Analog Devices |
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ADN8831-EVALZ Datasheet(HTML) 3 Page - Analog Devices |
3 / 20 page Data Sheet ADN8831 Rev. A | Page 3 of 20 DETAILED BLOCK DIAGRAM ADN8831 REFERENCE VB 1.25V 80kΩ 2kΩ 10kΩ 8 7 6 5 4 3 2 1 ILIMC IN1P IN1N OUT1 IN2P IN2N OUT2 32 31 30 29 28 27 26 25 24 22 21 18 17 16 15 14 12 11 10 9 TEMPERATURE GOOD 2.5V 20 19 COMPSW SFB PGND SNGATE SW SPGATE PVDD COMPOSC SOFT START SB 250mV OSCILLATOR SD SD DETECT 13 ITEC ILIMC ILIMH 100kΩ 100kΩ 20kΩ 20kΩ LFB LINEAR AMPLIFIER LPGATE LNGATE LFB VB VC 23 VB gm3 gm2 gm1 VC 20kΩ 20kΩ 20kΩ 20kΩ 1.25V 1.25V VB Chop2 Chop1 VB = 2.5V, VDD > 4.0V = 1.5V, VDD < 4.0V ILIMH VLIM VTEC ITEC CS VOLTAGE LIMIT 25kΩ 20kΩ 20kΩ 5kΩ SFB LFB 1.25V 1kΩ 25kΩ VREF 5kΩ 1kΩ AVDD PHASE TMPGD AGND FREQ SYNCO SYNCI/SD SS/SB Figure 2. Detailed Block Diagram |
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