CS43130 Datasheet, PDF (82/137 Pages) Cirrus Logic – 130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver

CS43130
5.11 Headphone Load Measurement
5.11 Headphone Load Measurement
The CS43130 can be configured to measure the impedance of headphone load. Please refer to Section 4.5.2 for a
description of headphone load detection. Fig. 5-1 and the following subsections describe the steps needed to measure
DC and AC impedance of the headphone.
START
Enable Impedance Measurement
Subsystem
AC/DC?
DC must be done once before AC
DC Impedance Measurement
AC Impedance Measurement
Disable Impedance Measurement
Subsystem
Figure 5-1. AC and DC Impedance Measurement Flowchart
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