ADN8834 does not work or has current overshoot

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ADN8834 does not work or has current overshoot [Copy link]

1. ADN8834 power-on probability VREF oscillation causes the chip to not work

Oscillation phenomenon; Test conditions: VLIM=0V~0.5V, T=25C, VCC RC: 30ohm, 22nf; ICC=10mA when VERF is normal, abnormal chip, ICC decreases to 5mA when VREF oscillates. The phenomenon recurs occasionally; is this caused by ringing?

2. ADN8834 ITEC pin introduces noise, causing current overshoot at chip output

Injection noise: 900mVpp, offset 500mV, 10KHz (timing according to VCC, noise, VLIM (0.5V)), what is the cause?

qwqwqw2088

When VREF oscillates, ICC decreases to 5mA. The phenomenon occasionally recurs; is this caused by ringing?

VREF provides a reference voltage of 2.5V. Why does it oscillate? You need to check

VREF test current is within Ivref = 0 mA to 10 mA

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qwqwqw2088 published on 2022-6-19 14:29 When VREF oscillates, ICC decreases to 5mA. The phenomenon reappears occasionally; is this caused by ringing? VREF provides a reference voltage of 2.5V, why does it oscillate...

Basically, there is oscillation at 3V. The following figure is a waveform diagram of the change of inductance at normal low temperature. If it is convenient, add QQ: 124439267. There must be a teacher among three people. Thanks for your reply