TAS2521

SLAS687A – FEBRUARY 2013 – REVISED FEBRUARY 2013

www.ti.com

Electrical Characteristics (continued)

PLL = Off

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Audio DAC – Stereo Single-Ended Headphone Output

Load = 16

Ω (single-ended), Input & Output CM =

0.75V, DOSR = 128, Device Setup MCLK = 256*

Device Setup

fs, Channel Gain = 0dB word length = 16 bits;

Processing Block = PRB_P1 Power Tune =

PTM_P3

Full-scale output voltage (0 dB)

0.375

Vrms

ICN

Idle channel noise

18.1

μVms

THD+N

Total harmonic distortion + noise

0-dBFS input, 1-kHz input signal

-78.2

dB

Mute attenuation

Mute

105.5

dB

PSRR

48.4

dB

DR

–60dB 1kHz input full-scale signal

86.8

Gain error

0dB, 1kHz input full scale signal

±0.3

dB

8

Maximum output power

mW

16

DAC DIGITAL INTERPOLATION FILTER CHARACTERISTICS

See for DAC interpolation filter characteristics.

DAC OUTPUT TO CLASS-D SPEAKER OUTPUT; LOAD = 4

Ω (DIFFERENTIAL)

BTL measurement, class-D gain = 6 dB, Measured

ICN

Idle channel noise

37

μVms

BTL measurement, class-D gain = 6 dB, -3dBFS

Output voltage

1.4

Vrms

input

BTL measurement, DAC input = –6 dBFS, class-D

THD+N

Total harmonic distortion + noise

–73.9

dB

gain = 6 dB

PSRR

Power-supply rejection ratio

55

dB

at 1 kHz

Mute attenuation

Mute

103

dB

SPKVDD = 3.6 V, BTL measurement, CM = 0.9V,

1.1

class-D gain = 18 dB, THD = 10%

SPKVDD = 4.2 V, BTL measurement, CM = 0.9 V,

1.4

class-D gain = 18 dB, THD = 10%

SPKVDD = 3.6 V, BTL measurement, CM = 0.9V,

Maximum output power

0.8

W

class-D gain = 18 dB, THD = 1%

SPKVDD = 4.2 V, BTL measurement, CM = 0.9V,

1.1

class-D gain = 18 dB, THD = 1%

SPKVDD = 5.5 V, BTL measurement, CM = 0.9V,

2

class-D gain = 18 dB

(1)

Ratio of output level with 1-kHz full-scale sine-wave input, to the output level with the inputs short-circuited, measured A-weighted over a

20-Hz to 20-kHz bandwidth using an audio analyzer.

(2)

All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may

result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter

removes out-of-band noise, which, although not audible, may affect dynamic specification values.

(3)

DAC to headphone-out PSRR measurement is calculated as PSRR = 20 X log(

6

ELECTRICAL SPECIFICATIONS

Copyright © 2013, Texas Instruments Incorporated

Submit Documentation Feedback

Product Folder Links: TAS2521