PCM2906C

SBFS037

– NOVEMBER 2011

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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).

PCM2906C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ADC CHARACTERISTICS

Resolution

8, 16

Bits

Audio data channel

1, 2

Channel

ADC Clock Frequency

fs

Sampling frequency

8, 11.025, 16, 22.05, 32, 44.1, 48

kHz

ADC DC Accuracy

Gain mismatch,

±1

±5

% of FSR

channel-to-channel

Gain error

±2

±10

% of FSR

Bipolar zero error

±0

% of FSR

ADC Dynamic Performance(8)

VIN = –1 dB

(9), V

CCCI = 3.67 V

0.01

0.02

%

Total harmonic distortion

THD+N

VIN = –1 dB

(10)

0.1

%

plus noise

VIN = –60 dB

5

%

Dynamic range

A-weighted

81

89

dB

SNR

Signal-to-noise ratio

A-weighted

81

89

dB

Channel separation

80

85

dB

Analog Input

Input voltage

0.6 VCCCI

VPP

Center voltage

0.5 VCCCI

V

Input impedance

30

k

Ω

–3 dB

150

kHz

Antialiasing filter frequency

response

fIN = 20 kHz

–0.08

dB

ADC Digital Filter Performance

Passband

0.454 fs

Hz

Stop band

0.583 fs

Hz

Passband ripple

±0.05

dB

Stop-band attenuation

–65

dB

td

Delay time

17.4/fs

s

HPF frequency response

–3 dB

0.078fs/1000

Hz

(8)

fIN = 1 kHz, using the System Two™ audio measurement system by Audio Precision™ in RMS mode with 20-kHz LPF, 400-Hz HPF in

calculation.

(9)

Using external voltage regulator for VCCCI (see Figure 36).

(10) Using internal voltage regulator for VCCCI (see Figure 37).

4

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© 2011, Texas Instruments Incorporated

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