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PDF BM90 Data sheet ( Hoja de datos )
| Número de pieza | BM90 | |
| Descripción | Bluetooth 3.0 Multi-Speaker Stereo Audio Module | |
| Fabricantes | ISSC | |
| Logotipo |  |
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BM90
Bluetooth® 3.0 Multi-Speaker Stereo Audio Module
Features
System Specification
Compliant with Bluetooth Specification v.3.0 + EDR
in 2.4 GHz ISM band module
It supports following profiles :
- Hands Free 1.5
- Headset 1.0
- A2DP 1.0
- AVRCP 1.0
Baseband Hardware
Built-in 16MHz main clock input.
Built-in internal ROM for program memory
Support to connect to two hosts ( phones, tablets…)
with HFP or A2DP profiles simultaneously
Adaptive Frequency Hopping (AFH) avoids
occupied RF channels
Fast Connection supported
RF Hardware
Fully Bluetooth 3.0 + EDR system in 2.4 GHz ISM
band.
Combined TX/RX RF terminal simplifies external
matching and reduces external antenna switches.
Max. +4dBm output power with 20 dB level control
from register control.
Built-in T/R switch for Class 2/3 application
To avoid temperature variation, temperature sensor
with temperature calibration is utilized into bias
current and gain control.
Fully integrated synthesizer has been created.
There requires no external VCO, varactor diode,
resonator and loop filter.
Crystal oscillation with built-in digital trimming for
temperature/process variations.
Built-in PCB antenna.
Audio processor
Support A-Law or -Law PCM format, or CVSD
(Continuous Variable Slope Delta Modulation) for
SCO channel operation.
Noise suppression
Echo suppression
SBC decoding
Packet loss concealment
Build-in one languages (English) voice prompts and
20 events for each one
Support SCMS-T
Audio Codec
16 bit DAC and 16 bit ADC codec
94dB SNR DAC playback
85 dB SNR ADC.
Peripherals
Built-in Lithium-ion battery charger (up to 350mA)
Integrate 3V, 1.8V configurable switching regulator
and LDO
Built-in ADC for battery monitor and voltage sense.
A line-in port for external audio input
Two LED drivers
Built-in 32Kb EEPROM
Flexible HCI interface
High speed HCI-UART (Universal Asynchronous
Receiver Transmitter) interface (up to 921600bps)
Package
15x29mm2 40 pins package
Description
BM90 multi-speaker stereo audio module is a
compact, highly integrated module for Bluetooth v3.0
with Enhanced Data Rate 2.4GHz applications. This
module is fully compliant with Bluetooth specification
and completely backward-compatible with Bluetooth
2.0 or 1.2 systems.
It incorporates IS1690S multi-speaker stereo audio
chip, 32Kb EEPROM, PCB antenna, and ISSC’s own
Bluetooth software stack to achieve the required BT
v3.0 with EDR functions.
page 1
1 page  
BM90 Module
Audio Interface
The module audio interface circuit consists of
Stereo audio CODEC.
One MIC. Input and Aux-in port
Stereo outputs.
FIGURE 1-2: Analog audio interface block diagram
BM90
SPKR
SPKL
AOHPM
MIC1_P
MIC1_N
MIC_BIAS
System Main Board
Audio PA
or 16/32
Ohm SPK
MIC and
Bias
Circuit
AIR
Aux-in
AIL
FIGURE 1-3: Twin Speaker Link block diagram
Music Source
Mobile Phone
Twin Master
Speaker
Twin Slave
Speaker
Stereo Aux-In
MIC
Input
Proprietary Protocol
page 5
5 Page 
BM90 Module
Table 4-6: Audio codec Digital to Analogue Converter
T= 25oC, VDDA/VDDAO=2.8V, 1KHz sine wave input, Bandwidth = 20~20KHz
Parameter (Condition)
Min.
Typ.
Over-sampling rate
128
Resolution
16
Output Sample Rate
8
Signal to Noise Ratio Note: 1
(SNR @line-load) for 48kHz
Signal to Noise Ratio
(SNR @earphone load 16Ω load, 0dBFS input relative to digital
silence)
Digital Gain
-54
94
Analog Gain
-28
Analog Gain Resolution
1
Output Voltage Full-scale Swing (AVDD=2.8V)
Maximum Output Power (16Ω load)
Maximum Output Power (32Ω load)
792
34
17
Allowed Load
Resistive
Capacitive
8 16
THD+N (16Ω load)
Note:
(1) fin=1KHz, B/W=20~20KHz, A-weighted, THD+N < 0.01%, 0dBFS signal, Load=100KΩ
(2) These parameters are characterized but not tested in manufacturing.
* O.C. : open circuit.
Max.
48
Unit
fs
Bits
KHz
dB
94
0
3
O.C.
500
0.05
dB
dB
dB
dB
mV rms
mW
mW
Ω
pF
%
page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BM90.PDF ] | |
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