PCM3070

www.ti.com

SLAS724A – SEPTEMBER 2008 – REVISED NOVEMBER 2014

8.7 Electrical Characteristics, Audio DAC Outputs

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

AUDIO DAC – STEREO SINGLE-ENDED LINE OUTPUT

Load = 10k

Ω (single-ended), 56pF

Line Output on AVDD Supply

Input and Output CM = 0.9V

Device Setup

DOSR = 128, MCLK = 256 x fs,

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

Processing Block = PRB_P1,

Full scale output voltage (0dB)

0.5

VRMS

SNR

Signal-to-noise ratio A-weighted(1)(2)

All zeros fed to DAC input

87

100

dB

–60dB 1kHz input full-scale signal, Word

DR

Dynamic range, A-weighted(1)(2)

100

dB

length = 20 bits

THD+N

Total Harmonic Distortion plus Noise

–3dB full-scale, 1kHz input signal

–83

–70

dB

DAC Gain Error

0 dB, 1kHz input full scale signal

0.3

dB

DAC Mute Attenuation

Mute

119

dB

DAC channel separation

–1 dB, 1kHz signal, between left and right HP

113

dB

out

100mVpp, 1kHz signal applied to AVDD

73

dB

DAC PSRR

100mVpp, 217Hz signal applied to AVDD

77

dB

AUDIO DAC – STEREO SINGLE-ENDED LINE OUTPUT

Load = 10k

Ω (single-ended), 56pF

Line Output on AVDD Supply

Input and Output CM = 0.75V; AVDD = 1.5V

DOSR = 128

Device Setup

MCLK = 256 * fs

Channel Gain = –2dB

word length = 20 bits

Processing Block = PRB_P1

Full scale output voltage (0dB)

0.375

VRMS

SNR

Signal-to-noise ratio, A-weighted(1)(2)

All zeros fed to DAC input

99

dB

DR

Dynamic range, A-weighted(1)(2)

–60dB 1 kHz input full-scale signal

97

dB

THD+N

Total Harmonic Distortion plus Noise

–1 dB full-scale, 1-kHz input signal

–85

dB

AUDIO DAC – STEREO SINGLE-ENDED HEADPHONE OUTPUT

Load = 16

Ω (single-ended), 50pF

Headphone Output on AVDD Supply,

Input and Output CM = 0.9V, DOSR = 128,

Device Setup

MCLK = 256 * fs, Channel Gain = 0dB

word length = 16 bits;

Processing Block = PRB_P1

Full scale output voltage (0dB)

0.5

VRMS

SNR

Signal-to-noise ratio, A-weighted(1)(2)

All zeros fed to DAC input

87

100

dB

–60dB 1kHz input full-scale signal, Word

DR

Dynamic range, A-weighted(1)(2)

99

dB

Length = 20 bits

THD+N

Total Harmonic Distortion plus Noise

–3dB full-scale, 1kHz input signal

–83

–70

dB

DAC Gain Error

0dB, 1kHz input full scale signal

–0.3

dB

DAC Mute Attenuation

Mute

122

dB

DAC channel separation

–1dB, 1kHz signal, between left and right HP

110

dB

out

100mVpp, 1kHz signal applied to AVDD

73

dB

DAC PSRR

100mVpp, 217Hz signal applied to AVDD

78

dB

(1)

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

20Hz to 20kHz bandwidth using an audio analyzer.

(2)

All performance measured with 20kHz low-pass filter and, where noted, A-weighted filter. Testing without 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

Copyright © 2008–2014, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Links: PCM3070