NJU72010 查看數據表（PDF） - Japan Radio Corporation

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NJU72010

2Vrms Ground Referenced Stereo Line Amplifier with LPF

Japan Radio Corporation  

NJU72010

1.1.2 Flying capacitor (C4)

Use capacitors with a low-ESR (ex. ceramic capacitors) for optimum performance. Design to provide

low impedance for the wiring between CP terminal (4pin), CN terminal (5pin), and the flying capacitor

(C4).

C4=1uF

CP(4pin)

CN(5pin)

Fig.2 The NJU72040 block diagram (4pin, 5pin)

1.1.3 Hold capacitor (C6)

Use capacitors with a low-ESR (ex. ceramic capacitors) for optimum performance. Design to provide

low impedance for the wiring between the hold capacitor (C6), V- terminal (6pin) and the GND on the

PCB.

Separate the GND pattern connecting to the hold capacitor (C6) from that connecting to the GND

terminal (8pin), thus suppressing the influence of switching noise by removing the common impedance

of the GND wiring.

Design no short-circuits of V- terminal (6pin) and V+ terminal (3pin) on the PCB pattern.

V-(6pin)

C6

GND(8pin)

Fig.3 The NJU72010 block diagram (6pin, 8pin)

1.1.4 Mute terminal pop noise countermeasures (R2, C7)

Mute terminal needs time constant more than R2 x C7=0.1. It is necessary to adjust 22kΩ or less.

– 10 –

MUTE(7pin)

400kΩ

R2=22kΩ

Vcnt

C7=4.7uF

Fig.4 The NJU72010 block diagram (7pin)

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