Avnera AVMD7F11A Users Manual

AudioMagic™ Module Datasheet

Point-to-Multipoint AVMD7211-04 Listener for

Wireless Audio Systems, based on Avnera’s AV7211 IC

General Description

Every consumer wants to be free from wires,
but system designers could never find a low-
cost, high-quality, easy-to-use wireless audio
solution for speakers, microphones,
headphones and headsets on the market.

Avnera’s proprietary wireless system changes
the game by taking a new approach to
wireless audio. The wireless protocol was
designed from the ground up and delivers
uncompressed stereo audio over the air
without interference problems.

Avnera’s wireless modules offer a low-touch,
easy-to-integrate wireless audio solution and
enable fast time to market by already solving
the problem associated with FCC, antenna
tuning and board optimization.

Modules based on Avnera’s AV72xx silicon
(also known as AudioMagic 1.5G) provide
breakthrough wireless audio functionality with
point to multipoint transport of uncompressed
stereo PCM audio data from a single
AVMD7211 sender and a total of up to three
simultaneous AVMD7212 listeners.

Applications

9 Wireless audio transmitter for portable

audio player

9 Wireless audio distribution hub for

surround speakers

Ordering Options

AVMD7211-04-ACNA: Analog-in, normal
range

AVMD7211-04-ACPA: Analog-in, extended
range

Features

9 Uncompressed audio, point to multipoint

capable (1 to 3)

9 Audio path SNR: Stereo 84 dB SNR, 48 kHz

sampling rate

9 Support for 14m (normal) and 30m

(extended) range

9 Frequency range: 2.4 GHz ISM band,

continuous dynamic frequency selection

9 Forward error correction coding, error

detection, and audio-specific error
concealment

9 Diversity antennas for multipath and fading

mitigation

9 Connector: Edge contact via array supports

surface mount

9 Auto-search/synch and dynamic channel

selection

9 Low, fixed latency suitable for video lip-

synch

9 Support for 16, 20, 24, and 32 bit PCM

words at 16, 22.05, 24, 32, 44.1, 48, and 96
kHz

9 General purpose over-the-air (OTA) serial

interface:

9 2 kbps, bi-directional, full duplex
9 Support for meta-data and remote

control commands

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AudioMagic AVMD7211-04 Module Datasheet PRELIMINARY v0p16

1 Table of Contents

General Description ______________________________________________________________ 1
Applications_____________________________________________________________________ 1
Ordering Options_________________________________________________________________ 1
Features________________________________________________________________________ 1
1 Table of Contents_____________________________________________________________ 2
2 Lists of Figures and Tables_____________________________________________________ 3
3 AVMD7211 Functional Block Diagrams__________________________________________4
4 AVMD7211 Pin Information ___________________________________________________ 6
5 AVMD7211 Mechanical Dimensions_____________________________________________7
6 Electrical Specifications _______________________________________________________ 8

6.1 Absolute Maximum Ratings _____________________________________________________________ 8

6.2 Recommended Operating Range__________________________________________________________ 8

6.3 Electrical Characteristics________________________________________________________________ 9

7 Application information ______________________________________________________ 10

7.1 Mechanical requirements_______________________________________________________________ 10

7.2 Application circuit ____________________________________________________________________ 14

7.3 EMI considerations____________________________________________________________________ 15

8 FCC and Industry Canada certification information _______________________________ 16

8.1 Label Information_____________________________________________________________________ 16

8.2 Equipment labeling requirements________________________________________________________ 16

8.3 User manual labeling requirements ______________________________________________________ 17

9 Ordering Information ________________________________________________________ 18
10 Contact Information and Legal Disclaimer _____________________________________ 19

CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 2 AVNERA PROPRIETARY & CONFIDENTIAL

AudioMagic AVMD7211-04 Module Datasheet PRELIMINARY v0p16

2 Lists of Figures and Tables

Table 1: AVMD7211-04 Module Block Diagram Description______________________________________________ 5
Table 2: AVMD7211-04 Pin Information _____________________________________________________________ 6
Table 3; AVMD7211-04 Electrical Characteristics______________________________________________________ 9
Table 4: AVMD7211 Module Ordering Information ____________________________________________________ 18

Figure 1: AVMD7211 Module Block Diagram without RF Power Amplifier (normal range)............................................. 4

Figure 2: AVMD7211 Module Block Diagram with RF Power Amplifier (extended range)............................................... 4

Figure 3: AVMD7211 mechanical dimensions.................................................................................................................... 7

Figure 4: Main board ground plane guidelines in the vicinity of the module.................................................................... 10

Figure 5: Module mounting requirements on the main board...........................................................................................11

Figure 6: Keep out requirements around the antenna of the module................................................................................. 12

Figure 7: Enclosure spacing requirements around the antenna end of the module........................................................... 13

Figure 8: AVMD7211 application schematic.....................................................................................................................14

Figure 9: Example of sub-1GHz EMI suppression using in-line ferrite chips................................................................... 15

Figure 9: Module pictures (not shown actual size)............................................................................................................ 18

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AudioMagic AVMD7211-04 Module Datasheet PRELIMINARY v0p16

3 AVMD7211 Functional Block Diagrams

When paired with an AV7212-based companion receiving device, the AVMD7211 modules support group
mode scenarios in which one sender can transmit audio to up to three listener modules simultaneously.

The nominal output power without PA is 0 dBm (normal range) and with a PA is +10 dBm (extended range)
into the antennas.

Figure 1: AVMD7211 Module Block Diagram without RF Power Amplifier (normal range)

Figure 2: AVMD7211 Module Block Diagram with RF Power Amplifier (extended range)

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AudioMagic AVMD7211-04 Module Datasheet PRELIMINARY v0p16

Table 1: AVMD7211-04 Module Block Diagram Description

Interface Description

SPI

GPIO/
LED

AINL
COM
AINR

PWR

V3.3
VA
VCCPA

VDDIO

The AVMD7111’s SPI interface is used to allow an external host to control the AV7111 sender
IC and to facilitate testing of the module.

The GPIO and LED lines allow buttons and LEDs to be connected to the AVMD7111 to allow
the user to control the AudioMagic™ system and communicate the system’s state to the user.

These three pins form the module’s analog audio input. The COM pin is tied to analog ground
on the module and should not be connected to ground in the host system.

This pin connects directly to the “PWR” pin on the AV7111 IC and is used to signal the module
to power on and off.

These pins provide power to various elements of the AVMD7111. The V3.3 pin, connected to
the AV7111 IC’s VBATT pin, supplies power to the AV7111. The VA pin supplies power to the
ADC. On the PA-enabled version of the module, VCCPA supplies power to the RF power
amplifier. In normal operation, all three pins are connected to the 3.3V (nom) main supply.

The VDDIO pin is connected to the VDDIO regulator bypass pin on the AV7111. The pin can
be used to indicate when the AV7111 IC is powered on. Note that VDDIO must NOT be used
to power an external device, nor should it be driven by an external supply.

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AudioMagic AVMD7211-04 Module Datasheet PRELIMINARY v0p16

4 AVMD7211 Pin Information

Table 2: AVMD7211-04 Pin Information

Pin Number Pin Name Type Pin Description

1 VCCPA Analog Power RF power amplifier supply connection
2 AGND Ground Analog section ground
3 V3.3 Analog Power 3.3V power supply connection
4 AGND Ground Analog section ground
5 VA Analog Power ADC power supply (3.3 V)
6 AINL Analog Input Left-channel audio input.
7 COM Analog Input Analog common connection
8 AINR Analog Input Right-channel audio input

9 PWR Analog Input Power switch input
10 LED2 Digital Output LED drive line
11 LED1 Digital Output LED drive line
12 LED0 Digital Output LED drive line
13 NC NC NC
14 NC NC NC
15 NC NC NC
16 GPIO6 Digital I/O General-Purpose I/O
17 GPIO5 Digital I/O General-Purpose I/O
18 DGND Ground Digital section ground
19 VDDIO Digital Power 3.3V regulated voltage
20 GPIO4 Digital I/O General-Purpose I/O
21 GPIO3 Digital I/O General-Purpose I/O
22 GPIO2 Digital I/O General-Purpose I/O
23 GPIO1 Digital I/O General-Purpose I/O
24 SDO Digital Output SPI data output
25 SDI Digital Input SPI data input
26 SSB Digital Input SPI slave select, active low
27 SCLK Digital Input SPI data clock input
28 AGND Ground Analog section ground
29 AGND Ground Analog section ground
30 AGND Ground Analog section ground

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