PCM3070

SLAS724A – SEPTEMBER 2008 – REVISED NOVEMBER 2014

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8.4 Thermal Information

PCM3070

RHB (QFN)

UNIT

32 PINS

Junction-to-ambient thermal resistance

31.4

Junction-to-case (top) thermal resistance

21.4

Junction-to-board thermal resistance

5.4

°C/W

Junction-to-top characterization parameter

0.2

Junction-to-board characterization parameter

5.4

Junction-to-case (bottom) thermal resistance

0.9

(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

8.5 Electrical Characteristics, ADC

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

IN1_R to Right ADC and IN1_L to Left ADC,

Device Setup

PLL Disabled; AGC = OFF, Channel Gain = 0dB,

Processing Block = PRB_R1,

Inputs ac-shorted to ground

80

93

SNR

dB

IN2_R, IN3_R routed to Right ADC and ac-shorted to ground

93

IN2_L, IN3_L 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

IN2_R, IN3_R routed to Right ADC

THD+N

Total Harmonic Distortion plus Noise

dB

IN2_L, IN3_L routed to Left ADC

–85

–3dB full-scale, 1-kHz input signal

AUDIO ADC

Input signal level (0dB)

0.375

1kHz sine wave input, Single-ended Configuration

IN1_R, IN2_R, IN3_R routed to Right ADC

IN1_L, IN2_L, IN3_L 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 measured 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.

8

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