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

Input pins INxP or INxM

2.5

kΩ

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

Full-scale AC signal

voltage Differential/Single

Ended

AC-coupled input

1

SNR

Signal-to-noise ratio, A-

weighted(1) (2)

IN1 differential/single-ended input selected and AC

signal shorted to ground, DRE enabled (DRE_LVL =

–36 dB, DRE_MAXGAIN = 18 dB)

110

117

dB

IN1 differential/single-ended input selected and AC

signal shorted to ground, DRE disabled

105

111

DR

Dynamic range, A-

weighted(2)

IN1 differential/single-ended input selected and –60-dB

full-scale AC signal input, DRE enabled (DRE_LVL = –36

dB, DRE_MAXGAIN = 18 dB)

117

dB

IN1 differential/single-ended input selected and –60-dB

full-scale AC signal input, DRE disabled

111

THD+N

Total harmonic distortion(2)

(3)

IN1 differential/single-ended input selected and –1-dB

full-scale AC signal input, DRE enabled (DRE_LVL =

–36 dB, DRE_MAXGAIN = 18 dB)

–95

–80

dB

IN1 differential/single-ended input selected and –1-dB

full-scale AC signal input, DRE disabled

–95

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

Gain drift(4)

Across temperature range -40°C to 125°C

50

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

input selected, 0-dB channel gain

102

dB

CMRR

Common-mode rejection

ratio

signal on both pins and measure level at output

45

dB

DIGITAL I/O

PCM1822

SBASAK0 – DECEMBER 2020 – REVISED MAY 2022

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