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ADN8834ACPZ-R2 Datasheet(PDF) 12 Page - Analog Devices |
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ADN8834ACPZ-R2 Datasheet(HTML) 12 Page - Analog Devices |
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12 / 27 page  ADN8834 Data Sheet Rev. B | Page 12 of 27 DETAILED FUNCTIONAL BLOCK DIAGRAM VB LINEAR AMPLIFIER VC 20kΩ ITEC 1.25V 1.25V 1.25V 5kΩ VTEC 20kΩ 20kΩ 5kΩ SFB IN2P IN2N OUT2 IN1P IN1N OUT1 1.25V VLIM/SD VC VB = 2.5V AT VDD > 4.0V VB = 1.5V AT VDD < 4.0V BAND GAP VOLTAGE REFERENCE VB VREF 2.5V VDD AGND TEC VOLTAGE LIMIT AND INTERNAL SOFT START COMPENSATION AMPLIFIER TEMPERATURE ERROR AMPLIFIER VDD ADN8834 VDD 40µA 10µA HEATING TEC CURRENT SENSE LDR TEC VOLTAGE SENSE SW PGNDS PVIN PWM POWER STAGE PWM MOSFET DRIVER EN/SY SFB 20kΩ 20kΩ 20kΩ 20kΩ 100kΩ VB VB 400kΩ 80kΩ PWM MODULATOR PWM ERROR AMPLIFIER ILIM COOLING ITEC 20k Ω TEC CURRENT LIMIT PGNDS LDR PGNDL PVIN PGNDL HEATING COOLING CLK SHUTDOWN 0.07V OSCILLATOR CLK SHUTDOWN DEGLITCH VHIGH ≥ 2.1V VLOW ≤ 0.8V 2kΩ 80kΩ TEC DRIVER LINEAR POWER STAGE + – + – Figure 25. Detailed Functional Block Diagram of the ADN8834 for the WLCSP |
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