PCM3070

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SLAS724

– FEBRUARY 2011

Electrical Characteristics, ADC

At 25

PLL disabled unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input signal level (0dB)

Single-ended, CM = 0.9V

0.5

1kHz sine wave input

Single-ended Configuration

IN1R to Right ADC and IN1L to Left ADC,

Device Setup

PLL Disabled; AGC = OFF,

Channel Gain = 0dB,

Processing Block = PRB_R1,

Inputs ac-shorted to ground

80

93

IN2R, IN3R routed to Right ADC and

93

SNR

dB

ac-shorted to ground

IN2L, IN3L routed to Left ADC and ac-shorted

to ground

DR

–60dB full-scale, 1-kHz input signal

92

dB

–3 dB full-scale, 1-kHz input signal

–85

–70

dB

IN2R,IN3R routed to Right ADC

–85

THD+N

Total Harmonic Distortion plus Noise

IN2L, IN3L routed to Left ADC

–3dB full-scale, 1-kHz input signal

AUDIO ADC

Input signal level (0dB)

Single-ended, CM=0.75V, AVdd = 1.5V

0.375

1kHz sine wave input

Single-ended Configuration

IN1R, IN2R, IN3R routed to Right ADC

IN1L, IN2L, IN3L routed to Left ADC

Device Setup

PLL Disabled, AGC = OFF,

Channel Gain = 0dB,

Processing Block = PRB_R1

SNR

Inputs ac-shorted to ground

91

dB

DR

–60dB full-scale, 1-kHz input signal

90

dB

THD+N

Total Harmonic Distortion plus Noise

–3dB full-scale, 1-kHz input signal

–80

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 measurements done with 20kHz 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

© 2011, Texas Instruments Incorporated

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