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WM8912 bảng dữ liệu(PDF) 12 Page - Cirrus Logic

tên linh kiện WM8912
Giải thích chi tiết về linh kiện  Ultra Low Power DAC with Headphone Driver
PDF  129 Pages
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nhà sản xuất  CIRRUS [Cirrus Logic]
Trang chủ  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8912 bảng dữ liệu(HTML) 12 Page - Cirrus Logic

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WM8912
Production Data
w
PD, Rev 4.1, February 2013
12
POWER CONSUMPTION
The WM8912 power consumption is dependent on many parameters. Most significantly, it depends
on supply voltages, sample rates, mode of operation, and output loading.
The power consumption on each supply rail varies approximately with the square of the voltage.
Power consumption is greater at fast sample rates than at slower ones. When the digital audio
interface is operating in Master mode, the DBVDD current is significantly greater than in Slave mode.
(Note also that power savings can be made by using MCLK as the BCLK source in Slave mode.) The
output load conditions (impedance, capacitance and inductance) can also impact significantly on the
device power consumption.
COMMON TEST CONDITIONS
Unless otherwise stated, the following test conditions apply throughout the following sections:
Ambient temperature = +25°C
Audio signal = quiescent (zero amplitude)
Sample rate = 48kHz
MCLK = 12.288MHz
Audio interface mode = Slave (LRCLK_DIR=0, BCLK_DIR=0)
SYSCLK_SRC = 0 (system clock comes direct from MCLK, not from FLL)
Additional, variant test conditions are quoted within the relevant sections below. Where applicable,
power dissipated in the headphone or line loads is included.



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