ADAU1772 Power Consumption
I have a question about the power consumption of ADAU1772.
In page9 of the ADAU1772 data sheet, the power consumption when AVDD=IOVDD is 3.3V is described as 11.5mA.
The measurement result of our board was 23mA.
ADVV=IOVDD = 3.3V
Master clock = 12.288MHz
Fs = 192KHz
Four ADCs and two DACs is used.
Parts such as LED are not used in the board.
What is thought as for the cause with large power consumption of our board?
Best Regards,
Mr.K
adau1772
Integrated/Special Purpose A/D Converters
Audio CODECs
Hi Mr. K.
Table 5 in the datasheet describes only the current on AVDD. It does not include IOVDD. Are you measuring the total current draw of the chip, or just the AVDD current draw?
The measurement conditions are listed above the table:
Typical active noise cancelling (ANC) settings. Master clock = 12.288 MHz, fS = 192 kHz. On-board regulator enabled. Two analog-to-digital converters (ADCs) with PGA enabled and two ADCs configured for line input; no input signal. Two digital-to-analog converters (DACs) configured for differential headphone operation; DAC outputs unloaded. Both MICBIAS0 and MICBIAS1 enabled. ASRCs and pulse density modulated (PDM) modulator disabled. Core running 26 out of 32 possible instructions. For total power consumption, add IOVDD at 8 kHz slave current listed in Table 4.
Are you configured for line input or microphone input? Are you providing an input signal or not? Are you loading the DAC outputs?
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Thank you,
EZ Admin
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