PCM2912A

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SLES230A – SEPTEMBER 2008 – REVISED AUGUST 2015

Electrical Characteristics (continued)

All specifications at TA = 25°C, VBUS = 5 V, fS = 44.1 kHz, fIN = 1 kHz, and 16-bit data, unless otherwise noted. for Host

interface, apply USB revision 2.0, full-speed. For audio data format, use UsB isochronous data format.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

MICROPHONE AMPLIFIER

Gain

0

20

dB

Input impedance

20

k

Ω

INPUT PGA

Gain range

–12

30

dB

Gain step size

1

dB

ADC DIGITAL FILTER PERFORMANCE

Passband

0.454 fS

Hz

Stop band

0.583 fS

Hz

Passband ripple

–0.02

0.02

dB

Stop-band attenuation

–65

dB

Delay time

17.4/fS

s

HPF frequency response

–3 dB

0.078 fS/1000

Hz

DIGITAL-TO-ANALOG CONVERTER (DAC) CHARACTERISTICS

Resolution

16

Bits

Audio data channel

1, 2

Channel

8

11.025

16

Sampling frequency

22.05

kHz

32

44.1

48

DAC DYNAMIC PERFORMANCE(7)

RL > 10 kΩ, VOUT = 0 dB of 0.6 VCCA

0.01%

0.02%

THD+N

Total harmonic distortion plus noise

RL = 32 Ω, VOUT = 0 dB of 0.55 VCCA

0.02%

0.05%

Dynamic range

EIAJ, A-weighted

82

90

dB

SNR

Signal-to-noise ratio

EIAJ, A-weighted

84

92

dB

Channel separation

RL > 10 kΩ

80

88

dB

DAC DC ACCURACY

Gain mismatch channel-to-channel

–10

±2

10

% of FSR

Gain error

–10

±2

10

% of FSR

Bipolar zero error

±3

% of FSR

ANALOG OUTPUT

RL > 10 kΩ

0.6 VCCA

Output voltage

VPP

RL = 32 Ω

0.55 VCCA

Center voltage

0.5 VCCA

V

RL = 32 Ω

13

Output power

mW

RL = 16 Ω

25

Line

10

k

Ω

Load impedance (AC coupling)

Headphone

16

32

Ω

–3 dB

140

kHz

LPF frequency response

f = 20 kHz

–0.1

dB

(7)

fOUT = 1 kHz, using Audio Precision System Two, RMS mode with 20-kHz LPF, 400-Hz HPF. Output attenuator = 0 dB,

Sidetone = Mute.

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