R261 datasheet(11/28 Pages) ONSEMI

11 / 28 page

BelaSigna R261

http://onsemi.com

Table 4. CRITICAL SIGNALS

Pin Name

Description

Connection Guidelines

VBAT

Power supply

Place 1 mF (min) decoupling capacitor close to pin

Connect negative terminal of capacitor to analog ground plane

VREG, VDDA

Internal regulator for analog

blocks

Place separate 1 mF decoupling capacitors close to each pin

Connect negative capacitor terminal to analog ground plane

Keep away from digital traces and output traces

VREG and VDDA may be used to generate microphone bias

VSSA

Analog ground return

Connect to analog ground plane

VDDD

Internal regulator for digital core

Place 1 mF decoupling capacitor close to pin

Connect negative terminal of capacitor to VSSD

VSSD

Digital ground return

Connect to digital ground plane

VDDO

Digital I/O power

Place 1 mF decoupling capacitor close to pin

Connect to VBAT, unless the pad ring must use different voltage levels

MIC0, MIC2,

AI1/LOUT1,

AI3/VMIC/LOUT0

Audio inputs / Microphone bias

Keep traces as short as possible

Keep away from all digital traces and audio outputs

Avoid routing in parallel with other traces

A_OUT0, A_OUT1

Audio outputs

Keep away from audio inputs

Differential traces should be of approximately the same length

Ideally, route lines parallel to each other

VSSRCVR

Output stage ground return

Connect to star ground point

Keep away from all analog audio inputs

EXT_CLK

External clock input

Minimize trace length

Keep away from analog signals

If possible, surround with digital ground

DMIC_OUT

Digital Microphone Output

Minimize trace length

Keep away from analog signals

If possible, surround with digital ground

R261 Datasheet(PDF) 11 Page - ON Semiconductor

R261 Datasheet(HTML) 11 Page - ON Semiconductor

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

Datasheet Download

Link URL