7.5 Electrical Characteristics (continued)

TDM slave mode (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Gain drift(4)

Across temperature range -40°C to 125°C

40.5

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

PCM1820:

CMRR

Common-mode rejection

ratio

signal on both pins and measure level at output

45

dB

PCM1821:

CMRR

Common-mode rejection

ratio

signal on both pins and measure level at output

60

dB

DIGITAL I/O

Low-level digital input logic

voltage threshold

All digital pins except FMT0, IOVDD 1.8-V operation

–0.3

0.30 ×

IOVDD

V

All digital pins except FMT0, IOVDD 3.3-V operation

–0.3

0.8

FMT0 Pin

–0.3

0.8

V

High-level digital input logic

voltage threshold

All digital pins except FMT0, IOVDD 1.8-V operation

0.7 × IOVDD

IOVDD + 0.3

V

All digital pins except FMT0, IOVDD 3.3-V operation

2.1

IOVDD + 0.3

FMT0 Pin

2.1

AVDD + 0.3

V

Low-level digital output

voltage

0.45

V

0.4

High-level digital output

voltage

IOVDD –

0.45

V

2.4

Input logic-high leakage for

digital inputs

All digital pins, input = IOVDD

–5

0.1

5

µA

Input logic-low leakage for

digital inputs

All digital pins, input = 0 V

–5

0.1

5

µA

Input capacitance for digital

inputs

All digital pins

5

pF

Pulldown resistance for

digital I/O pins when

asserted on

20

kΩ

TYPICAL SUPPLY CURRENT CONSUMPTION

Current consumption with

all Clocks disabled

AVDD = 3.3 V, internal AREG

0.5

mA

All external clocks stopped, IOVDD = 3.3 V

0.5

µA

All external clocks stopped, IOVDD = 1.8 V

0.3

Current consumption with

ADC 2-channel operating

AVDD = 3.3 V, internal AREG

11.9

mA

IOVDD = 3.3 V

0.05

IOVDD = 1.8 V

0.02

Current consumption with

ADC 2-channel operating

AVDD = 3.3 V, internal AREG

12.9

mA

IOVDD = 3.3 V

0.1

IOVDD = 1.8 V

0.05

Current consumption with

ADC 2-channel operating

AVDD = 3.3 V, internal AREG

14

mA

IOVDD = 3.3 V

0.1

IOVDD = 1.8 V

0.05

(1)

Ratio of output level with 1-kHz full-scale sine-wave input, to the output level with the AC signal input shorted to ground, measured

A-weighted over a 20-Hz to 20-kHz bandwidth using an audio analyzer.

(2)

All performance measurements done with a 20-kHz, low-pass filter and, where noted, an A-weighted filter. Failure to use such a filter

may result in higher THD 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.

(3)

For best distortion performance, use input AC-coupling capacitors with a low-voltage-coefficient.

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PCM1820, PCM1821

SBASA61A – DECEMBER 2020 – REVISED JUNE 2021

Copyright © 2021 Texas Instruments Incorporated

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