PCM3000 datasheet(34/44 Pages) TI2

34 / 44 page

www.ti.com

APPLICATION INFORMATION

APPLICATION AND LAYOUT CONSIDERATIONS

TYPICAL CONNECTION

470 pF

4.7

µF

4.7

µF

2.2

µF(2)

2.2

µF(2)

10 to 33 pF

4.7

µF +

Interface

Reference

Bias

Analog

Front-End

Decimation

Filter

Interpolation

Filter

LPF and

Buffer

Digital

Audio

Interface

CLK/OSC

Manager

Delta-Sigma

Post

Low-Pass

Filter

(1)

Serial

Control

Format

Control

Digital

Audio

Data

Reset

Line In Left-Channel

+5V

Line In Right-Channel

Line Out Right-Channel

Line Out Left-Channel

S0018-01

Post

Low-Pass

Filter

Analog

Front-End

LPF and

Buffer

POWER SUPPLY BYPASSING

PCM3000

PCM3001

SBAS055A – OCTOBER 2000 – REVISED OCTOBER 2004

A typical connection diagram for the PCM3000/3001 is shown in Figure 34.

(1)

Bypass capacitor = 0.1

µF and 10 µF.

(2)

The input capacitor affects the pole of the HPF. Example: 2.2

µF sets the cutoff frequency to 4.8 Hz, with a 66-ms

time constant.

Figure 34. Typical Connection Diagram for PCM3000/3001

The digital and analog power-supply lines to the PCM3000/3001 should be bypassed to the corresponding

ground pins with both 0.1-

µF ceramic and 10-µF tantalum capacitors as close to the device pins as possible to

maximize the performance of the ADC and DAC. Although the PCM3000/3001 has three power supply lines to

optimize dynamic performance, the use of one common power supply is generally recommended to avoid

unexpected latch-up or pop noise due to power-supply sequencing problems. If separate power supplies are

used, back-to-back diodes between the two power sources near the device are recommended to avoid latch-up

problems.

PCM3000 Datasheet(PDF) 34 Page - Texas Instruments

PCM3000 Datasheet(HTML) 34 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL