www.ti.com

PCM2912

SLES216 – FEBRUARY 2008

ELECTRICAL CHARACTERISTICS (continued)

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

PCM2912PJT

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

ADC CHARACTERISTICS

Resolution

16

Bits

Audio data channel

1

channel

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

Sampling frequency

kHz

48

DYNAMIC PERFORMANCE(6)

THD+N

VIN = –1 dB of 0.43 VCCA

0.01%

0.02%

Dynamic range

A-weighted

82

90

dB

S/N ratio

A-weighted

84

92

dB

DC ACCURACY

Gain error

±2

±10 % of FSR

Bipolar zero error

±0

% of FSR

ANALOG INPUT

Input voltage

0.43 VCCA

Vp-p

Center voltage

0.5 VCCA

V

–3 dB

150

kHz

Antialiasing filter frequency

response

fIN = 20 kHz

–0.08

dB

MICROPHONE AMPLIFIER

Gain

0

20

dB

Input impedance

20

k

Ω

INPUT PGA

Gain range

–12

30

dB

Gain step size

1

dB

DIGITAL FILTER PERFORMANCE

Pass band

0.454 fS

Hz

Stop band

0.583 fS

Hz

Pass-band ripple

±0.02

dB

Stop-band attenuation

–65

dB

Delay time

17.4/fS

s

HPF frequency response

–3 dB

0.078 fS

MHz

(6)

fIN = 1 kHz, using Audio Precision™ System Two™, RMS mode with 20 kHz LPF, 400 Hz HPF in calculation. Mic amp = 0 dB, PGA =

0 dB.

4

Submit Documentation Feedback

Copyright © 2008, Texas Instruments Incorporated

Product Folder Link(s): PCM2912