AN2612 Datasheet, PDF (1/28 Pages) STMicroelectronics – Single 5-V DC power supply

AN2612
Applications note
How to use the BT_HTS_RX_R2 evaluation board
Features
! Support A2DP/AVRCP (sink side) profile.
! Class 2 (max +4 dBm RF power output), BQB qualified module.
! Single 5-V DC power supply.
! 1.5-Vpp line-out (stereo) with full scale input.
Hardware/software version
! Hardware version: R2A.
! Software version: E1.0.3.
Overview
The demo-board BT_HTS_RX_R2 facilitates the evaluation of the BT-STA2416C2
Bluetooth^® technology wireless module in an A2DP environment. It is based on the
SOUNDabout^® and BLUEmagic^® software of Open Interface North America, Inc and it
guarantees a broad compatibility (Table 6) and a full set of certifications (Table 4, Table 5).
Figure 1. shows a block diagram of the BT_HTS_RX_R2 board. The Bluetooth^® technology
stream received by the RF antenna is sent to the BT-STA2416C2. This highly-integrated
module is able to communicate wirelessly with BTA2DP sources such as cellular phones,
BT dongles and notebook PCs.
Audio data is then fed into the STA529. This device provides the codec and a high-efficiency
class-D output stage based on FFX™ technology.
The PWM output signal is then reconverted to an analog audio signal by a TS462 (or an
ADA4841-2) op-amp configured to filter the PWM and supply a standard 1.5-Vpp line
output.
Figure 1. Block diagram
September 2007
LPF+BUFFER
CODEC
AD4811-2
PWM ^STA529
SSI
3V3 LDO
+5VDC
3V3 LDO
Rev 1
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