[AK4205]

016012367-E-00

2016/12

- 9 -

Parameter

Min.

Typ.

Max.

Unit

HP-amp Block: PINA-NINA, PINB-NINB pins (Full Differential Input)

→ AMPOUA, AMPOUB pins,

Rd = 33

Ω (Figure 4)

Amp Gain

Gain Setting

0.18

0.48

0.78

dB

THD+N

RL = 32

Ω (Note 24)

-

-114

-

dB

RL = 32

Ω (Note 25)

-

-118

-

dB

RL = 600

Ω(Note 24)

-

-117

-

dB

RL = 600

Ω(Note 25)

-

-120

-

dB

Output Noise Level (A-weighted) (Note 26, Note 27)

-

-116

-

dBV

Output Noise Level (A-weighted) (Note 25, Note 27)

-

-117

-

dBV

PSRR (Note 28)

f = 217 Hz

-

120

-

dB

f = 1 kHz

-

115

-

dB

Note 27. Input signal is DC2.5 V

Note 28.

When sine wave of 500 mVpp is superimposed on PVDDA, PVDDB, PVEEA, PVEEB.

Note 29. For analog characteristics of the headphone amplifier that is not listed in the above column,

refer to the analog characteristics of the headphone amplifier + Analog Switch part.

Note 30.

When only using the headphone amplifier, the power supply voltage described in the

recommended operating conditions should also be input to SWVDD

NINA pin

(NINB pin)

PINA pin

(PINB pin)

AVSSA pin

(AVSSB pin)

AMPOUTA pin

(AMPOUTB pin)

RL

Rd

DC 2.5V

DC 2.5V

Figure 4. Measurement Circuit for Headphone-amp