PCM1820 datasheet(16/120 Pages) TI

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7.13 Typical Characteristics (continued)

at TA = 25°C, AVDD = 3.3 V, IOVDD = 3.3 V, fIN = 1-kHz sinusoidal signal, fS = 48 kHz, 32-bit audio data, BCLK = 256 × fS,

TDM slave mode, PLL on, channel gain = 0 dB, and linear phase decimation filter (unless otherwise noted); all performance

measurements are done with a 20-kHz, low-pass filter, and an A-weighted filter

Input Amplitude (dB)

-130

-115

-100

-85

-70

-55

-40

-25

-10

-1

-130

-120

-110

-100

-90

-80

-70

-60

THD+

D013

Channel-1

Channel-2

Channel-3

Channel-4

Figure 7-16. PDM Input THD+N vs Input Amplitude

Frequency (Hz)

30 4050 70 100

200 300

500

1000

2000

5000

10000

20000

-130

-120

-110

-100

-90

-80

-70

-60

THD+

D022

Channel-1

Channel-2

Channel-3

Channel-4

Figure 7-17. PDM Input THD+N vs Input Frequency With a

–20-dBr Input

Frequency (Hz)

30 4050 70 100

200 300

500

1000

2000

5000

10000

20000

-200

-180

-160

-140

-120

-100

-80

-60

-40

-20

D015

Channel-1

Channel-2

Channel-3

Channel-4

Figure 7-18. PDM Input FFT With a –60-dBr Input

Frequency (Hz)

20 30

50 70 100

200300 500 1000 2000

5000 10000 20000

100000

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Freq

D016

Channel-1

Channel-2

Channel-3

Channel-4

Figure 7-19. PDM Input Frequency Response With a

–20-dBr Input

TLV320ADC3120

SBASA91A – DECEMBER 2020 – REVISED JUNE 2021

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