7.4 Thermal Information

THERMAL METRIC(1)

PCM182x

UNIT

RTE (WQFN)

20 PINS

Junction-to-ambient thermal resistance

55.9

°C/W

Junction-to-case (top) thermal resistance

33.1

°C/W

Junction-to-board thermal resistance

23.4

°C/W

Junction-to-top characterization parameter

0.6

°C/W

Junction-to-board characterization parameter

23.3

°C/W

Junction-to-case (bottom) thermal resistance

16.7

°C/W

(1)

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

report.

7.5 Electrical Characteristics

TDM slave mode (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ADC CONFIGURATION

AC input impedance

(PCM1820)

Input pins INxP or INxM

2.5

kΩ

AC input impedance

(PCM1821)

10

kΩ

PCM1820: ADC PERFORMANCE FOR LINE, MICROPHONE INPUT RECORDING : AVDD 3.3-V OPERATION

Differential input full-scale

AC signal voltage

AC-coupled input

2

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)

115

122

dB

IN1 differential input selected and AC signal shorted to

ground, DRE disabled

106

112

DR

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)

123

dB

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

signal input, DRE disabled

113

THD+N

Total harmonic distortion(2)

(3)

IN1 differential input selected and –1-dB full-scale AC

signal input, DRE enabled (DRE_LVL =

–36 dB, DRE_MAXGAIN = 24 dB)

–95

–80

dB

IN1 differential input selected and –1-dB full-scale AC

signal input, DRE disabled

–95

PCM1821: ADC PERFORMANCE FOR LINE, MICROPHONE INPUT RECORDING : AVDD 3.3-V OPERATION

Differential input full-scale

AC signal voltage

AC-coupled input

2

SNR

Signal-to-noise ratio, A-

weighted(1) (2)

IN1 differential input selected and AC signal shorted to

ground

100

106

dB

DR

Dynamic range, A-

weighted(1) (2)

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

signal input

106

dB

THD+N

Total harmonic distortion(2)

(3)

IN1 differential input selected and –1-dB full-scale AC

signal input

–95

dB

ADC OTHER PARAMETERS

Output data sample rate

7.35

192

kHz

Output data sample word

length

32

Bits

Interchannel isolation

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

channel

–124

dB

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

0.1

dB

PCM1820, PCM1821

SBASA61A – DECEMBER 2020 – REVISED JUNE 2021

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