NJU8721V 查看數據表（PDF） - Japan Radio Corporation

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产品描述 (功能)

生产厂家

NJU8721V

CLASS D HEADPHONE AMPLIFIER FOR DIGITAL AUDIO

Japan Radio Corporation  

NJU8721

Note 6) Analog AC Characteristics Test System

Analog AC characteristics test system is shown in Figure 6. The analog AC characteristics of NJU8721

is measured with 2nd-order LC LPF on the test board and Filters in the Audio Analyzer.

Digital

Data

Digital Audio

Interface

Receiver Chip

NJU8721

2nd-order

LC LPF

Filters

THD

Measuring

Apparatus

NJU8721 Evaluation Board

Audio Analyzer

Figure 6. Analog AC Characteristics Measurement System

2nd-order LPF

Filters

: fc=34kHz, refer to the LPF on Application Circuit.

: 22Hz HPF + 20kHz 10th-order LPF

(with the A-Weighting Filter at measuring S/N and Dynamic-range)

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