CS35L32 datasheet(49/51 Pages) CIRRUS

49 / 51 page

DS963F5

CS35L32

9 Parameter Definitions

Figure 8-17. VMON to IMON Phase vs. Frequency @ 1 W—

Fixed-Boost Mode (VBST = 5 V)

Load = 8

 + 5 H, 8  + 10 H, 8  + 33 H, 8  + 15 H

Figure 8-18. IMON FFT, 1 kHz @ Load = 0.9 W—VBST = 5 V

Figure 8-19. IMON FFT, 1 kHz @ No load—VBST = 5 V

MCLKINT. Internal clock that is either equal to the signal connected to the MCLK (MCLKEXT) or is equal to

MCLKEXT/2, depending on the setting of the MCLK divide-by-2 control (MCLKDIV2), described in Section 7.7.

Output offset voltage. Describes the DC offset voltage present at the amplifier’s output when its input signal is in a

Mute State. The offset exists due to CMOS process limitations and is proportional to analog volume settings. When

measuring the offset out of the line amplifier, the line amplifier is ON and the headphone amplifier is OFF; when

measuring the offset out of the headphone amplifier, the headphone amplifier is ON and the line amplifier is OFF.

Signal-to-noise ratio (SNR). The ratio of the RMS value of the output signal, where Pout is equivalent to the specified

output power at THD+N < 1%, to the RMS value of the noise floor with no input signal applied and measured over

the specified bandwidth, typically 20 Hz to 20 kHz. This measurement technique has been accepted by the

Electronic Industries Association of Japan, EIAJ CP–307. Expressed in decibels.

Total harmonic distortion + noise (THD+N). The ratio of the rms value of the signal to the rms sum of all other

spectral components over the specified bandwidth (typically 10 Hz to 20 kHz), including distortion components.

THD+N is measured at –1 and –20 dBFS for the analog input and 0 and –20 dB for the analog output as suggested

in AES17–1991 Annex A. THD+N is expressed in decibel units.

8−

Ω, 4.7−μH Load

8−

Ω, 10−μH Load

8−

Ω, 15−μH Load

8−

Ω, 33−μH Load

100

1000

10000

−30

−20

−10

Frequency (Hz)

100

1000

10000

−140

−120

−100

−80

−60

−40

−20

Frequency (Hz)

100

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10000

−140

−120

−100

−80

−60

−40

−20

Frequency (Hz)

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