PCM1820 datasheet(8/130 Pages) TI

8 / 130 page

7.5 Electrical 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, and PLL on (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SNR

Signal-to-noise ratio, A-

weighted(1) (2)

IN1 differential input selected and AC signal shorted

to ground, DRE enabled (DRE_LVL = –36 dB,

DRE_MAXGAIN = 24 dB), 2.5-kΩ input impedance

selection

116

IN1 differential input selected and AC signal shorted

to ground, DRE enabled (DRE_LVL = –36 dB,

DRE_MAXGAIN = 24 dB), 10-kΩ input impedance

selection

111

IN1 differential input selected and AC signal shorted

to ground, DRE disabled, 2.5-kΩ input impedance

selection, 0-dB channel gain

105

Dynamic range, A-

weighted(2)

IN1 differential input selected and –60-dB full-scale

AC signal input, DRE enabled (DRE_LVL = –36 dB,

DRE_MAXGAIN = 24 dB), 2.5-kΩ input impedance

selection

117

IN1 differential input selected and –60-dB full-scale

AC signal input, DRE enabled (DRE_LVL = –36 dB,

DRE_MAXGAIN = 24 dB), 10-kΩ input impedance

selection

112

IN1 differential input selected and –60-dB full-scale AC

signal input, DRE disabled, 2.5-kΩ input impedance

selection, 0-dB channel gain

106

THD+N

Total harmonic distortion(2)

(3)

IN1 differential input selected and –2-dB full-scale

AC signal input, DRE enabled (DRE_LVL = –36 dB,

DRE_MAXGAIN = 24 dB), 2.5-kΩ input impedance

selection

–90

IN1 differential input selected and –2-dB full-scale

AC signal input, DRE enabled (DRE_LVL = –36 dB,

DRE_MAXGAIN = 24 dB), 10-kΩ input impedance

selection

–90

IN1 differential input selected and –2-dB full-scale AC

signal Input, DRE disabled, 2.5-kΩ input impedance

selection, 0 dB channel gain

–90

ADC OTHER PARAMETERS

Digital volume control

range

Programmable 0.5-dB steps

–100

Output data sample rate

Programmable

7.35

768

kHz

Output data sample word

length

Programmable

Bits

Digital high-pass filter cutoff

frequency

First-order IIR filter with programmable coefficients,

–3-dB point (default setting)

Interchannel isolation

–1-dB full-scale AC-signal input to non measurement

channel

–124

Interchannel gain mismatch –6-dB full-scale AC-signal input and 0-dB channel gain

0.1

Gain drift(4)

0-dB channel gain, across temperature range –40°C to

125°C

36.8

ppm/°C

Interchannel phase

mismatch

1-kHz sinusoidal signal

0.02

Degrees

Phase drift(5)

1-kHz sinusoidal signal, across temperature range –

40°C to 125°C

0.0005

Degrees/°C

PSRR

Power-supply rejection

ratio

100-mVPP, 1-kHz sinusoidal signal on AVDD, differential

input selected, 0-dB channel gain

102

CMRR

Common-mode rejection

ratio

Differential microphone input selected, 0-dB channel

gain, 100-mVPP, 1-kHz signal on both pins and measure

level at output in high CMRR Mode

MICROPHONE BIAS

MICBIAS noise

BW = 20 Hz to 20 kHz, A-weighted, 1-μF capacitor

between MICBIAS and AVSS

2.1

µVRMS

TLV320ADC6120

SBASA92A – DECEMBER 2020 – REVISED JUNE 2021

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