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Bluetooth Stereo Audio Module- BTZ-983H

BTZ-983H Bluetooth

Stereo Audio Module Data Sheet

Introduction

The BTZ-983H, based on Microchip’s dual-mode IS2083 system-on-chip (SoC) device, is an RF-certified, fully

integrated module with high-performing voice and audio post-processing capability for Bluetooth audio applications.

Tuning for Noise Reduction, Acoustic Echo Cancellation (AEC), and EQ filtering can be customized with an easy-to-

use GUI Configuration Tool. This flexible platform provides multiple digital and analog audio interfaces including

stereo microphones, I

S, Line-In and a stereo audio DAC. It supports easy firmware upgrades via UART, USB and

Over-the- Air (OTA).

This turn-key solution module pre-programmed with firmware that enables Bluetooth audio playback, for a plug-and-

play solution. Control settings for LED drivers and other peripherals can be set via the Configuration Tool. Advanced

developers can use the Software Development Kit (SDK) to implement their embedded applications.

Note: Contact your local sales representative for more information about the Software Development Kit (SDK).

Figure 1. BTZ-983H Module Block Diagram

PCB ANTENNA

BTM-983H

IS2083BM

LINE-IN

DSP

BLUETOOTH

TRANSCEIVER

XTAL

MIC-1

(STEREO DIGITAL)

AUDIO

CODEC

MIC-1

(ANALOG)

CORE

POWER

MANAGEMENT

UNIT

MIC-2

(ANALOG)

FLASH

MEMORY

ROM

I/O PORT

RAM

BAT_IN

ADAP_IN

Summary of content (58 pages)

PAGE 1
Bluetooth Stereo Audio Module- BTZ-983H BTZ-983H Bluetooth® Stereo Audio Module Data Sheet Introduction The BTZ-983H, based on Microchip’s dual-mode IS2083 system-on-chip (SoC) device, is an RF-certified, fully integrated module with high-performing voice and audio post-processing capability for Bluetooth audio applications. Tuning for Noise Reduction, Acoustic Echo Cancellation (AEC), and EQ filtering can be customized with an easy-touse GUI Configuration Tool.
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BTM-983H The BTZ-983H module supports the following Bluetooth profiles and codecs: • • Profiles: – Hands-free Profile (HFP) 1.7, Headset Profile (HSP) 1.2, Advanced Audio Distribution Profile (A2DP) 1.3, Serial Port Profile (SPP) 1.2, Audio/Video Remote Control Profile (AVRCP) 1.6, and Phone Book Access Profile (PBAP) 1.2 Codecs: – Advanced Audio Codec (AAC) and Sub-band Coding (SBC) Features • • • • • • • • • Qualified for Bluetooth v5.0 Specification – HFP 1.7, HSP 1.2, A2DP 1.3, SPP 1.
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BTM-983H • • Modified Sub-Band Coding (mSBC) Decoder for Wideband Speech Packet Loss Concealment (PLC) for SBC and AAC Codecs Only Audio Codec • SBC and AAC • 20-bit Audio Stereo DAC with Signal-to-Noise Ratio (SNR) 95 dB • 16-bit Audio Stereo Analog-to-Digital Converter (ADC) with SNR 90 dB • 16-bit/24-bit I2S Digital Audio – 8 kHz, 16 kHz, 44.
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BTZ-983H Device Overview 2. Device Overview The BTZ-983H stereo audio module is built around the IS2083BM SoC, which integrates the dual-mode baseband, modem, radio transceiver, PMU, MCU, crystal, and a DSP dedicated for audio and voice applications. Users can configure the BTZ-983H module by using the SDK or the IS208x_Config_GUI_Tool (Config Tool). There are two modes of operation: • • Host mode: – Interfaces with an external MCU over UART for application specific system control.
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BTZ-983H Device Overview The following table provides the features of the BTZ-983H module. Table 2-1.
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BTZ-983H Device Overview 2.1 BTZ-983H Module Pin Diagram The following figure illustrates the pin diagram of the BTZ-983H module. Figure 2-2.
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BTZ-983H Device Overview 2.2 BTZ-983H Module Pin Description The following table describes the pin description of the BTZ-983H module. Table 2-2.
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BTZ-983H Device Overview ...........
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BTZ-983H Device Overview ...........
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BTZ-983H Audio Subsystem 3. Audio Subsystem The input and output audios have different stages and each stage can be programmed to vary the gain response characteristics. For microphone, both single-ended inputs and differential inputs are supported. To maintain a high quality signal, a stable bias voltage source to the condenser microphone’s Field-Effect Transistor (FET) is provided. The DC blocking capacitors can be used at both positive and negative sides of an input.
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BTZ-983H Audio Subsystem outgoing signal level to the speaker is monitored and adjusted to avoid saturation of speaker output or microphone input. Adaptive filtering is also applied to track the echo path impulse in response, to provide an echo free and fullduplex user experience. The embedded noise reduction algorithm helps to extract clean speech signals from the noisy inputs captured by the microphones and improves communication.
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BTZ-983H Audio Subsystem • • • • • – One stereo single-ended line input – One stereo single-ended line output – One stereo single-ended headphone output (capacitor-less connection) Built-in circuit – MIC bias – Reference and biasing circuitry Optional digital High Pass Filter (HPF) on ADC path Silence detection – To turn off the DSP and audio codec subsystem, if there is no Line-In data after UI configured time stamp.
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BTZ-983H Audio Subsystem Figure 3-4 Gain Vs.
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BTZ-983H Audio Subsystem Figure 3-5 Gain Vs. Input Level at Various Loads (Single-ended Mode) Figure 3-6 Gain Vs.
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BTZ-983H Audio Subsystem Figure 3-7. Gain Vs. Frequency at Various Loads (Single-ended Mode) Figure 3-8. Level Vs.
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BTZ-983H Audio Subsystem Figure 3-9. Level Vs. Frequency at Various Loads (Single-ended Mode) Figure 3-10. THD Ratio (%) Vs.
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BTZ-983H Audio Subsystem Figure 3-11 THD Ratio (dB) Vs.
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BTZ-983H Audio Subsystem Figure 3-12 THD+N Ratio (%) Vs.
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BTZ-983H Audio Subsystem Figure 3-13 THD+N Ratio (%) Vs.
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BTZ-983H Audio Subsystem Figure 3-14 THD+N Ratio (%) Vs. Input Level at Various Loads (Single-ended Mode) Figure 3-15 THD+N Ratio (dB) Vs.
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BTZ-983H Audio Subsystem Figure 3-16 THD+N Ratio (%) Vs.
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BTZ-983H Audio Subsystem Figure 3-17. THD+N Ratio (dB) Vs. Output Level at Various Loads (Capless Mode) Figure 3-18. THD+N Ratio (%) Vs.
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BTZ-983H Audio Subsystem Figure 3-19. THD+N Ratio (dB) Vs. Output Level at Various Loads (Single-ended mode) 3.2.
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BTZ-983H Audio Subsystem The following figures illustrate the ADC performance Figure 3-20. Gain Vs. Input Level Figure 3-21. Gain Vs.
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BTZ-983H Audio Subsystem Figure 3-22. Output Level Vs. Input Level Figure 3-23. Level Vs.
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BTZ-983H Audio Subsystem Figure 3-24. THD+N Ratio (%) Vs. Input Level Figure 3-25. THD+N Ratio (dB) Vs.
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BTZ-983H Audio Subsystem Figure 3-26. THD+N Ratio (%) Vs. Output Level Figure 3-27. THD+N Ratio (dB) Vs. Output Level © 2019 Microchip Technology Inc.
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BTZ-983H Audio Subsystem Figure 3-28. THD+N Ratio (%) Vs. Frequency Figure 3-29. THD+N Ratio (%) Vs.
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BTZ-983H Audio Subsystem 3.3 Auxiliary Port The BTZ-983H module supports one analog (Line-In, also called as Aux-In) signal from the external audio source. The analog (Line-In) signal can be processed by the DSP to generate different sound effects (MB-DRC and AW), which can be configured by using the Config Tool. 3.
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BTZ-983H Audio Subsystem 3.5 Microphone Inputs The BTZ-983H module supports up to two analog microphone channels and one stereo digital microphone.
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BTZ-983H Bluetooth Transceiver 4. Bluetooth Transceiver The BTZ-983H module is designed and optimized for the Bluetooth 2.4 GHz system. It contains a complete RF Transmitter (TX)/Receiver (RX) section. An internal synthesizer generates a stable clock for synchronizing with another device. 4.1 Transmitter The IS2083BM device has an internal Medium Power Amplifier (MPA) and a Low Power Amplifier (LPA).
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BTZ-983H Power Management Unit 5. Power Management Unit The on-chip PMU integrates the battery (lithium-ion and lithium-polymer) charger, and voltage regulator. A power switch is used to switch over the power source between the battery (BAT_IN) and an adapter (ADAP_IN). The PMU provides current to drive two LEDs.
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BTZ-983H Power Management Unit Figure 5-2. Power Tree Diagram BK_VDD 1.8V Buck Switching Regulator (Buck2) BK_O BK_LX (1.8V) VDDA/ VDDAO Li-ion Battery LDO31_VIN (3.2 to 4.2V) (4.5 to 5.5V) 5V Adapter 3V LDO BAT_IN VDD_IO LDO31_VO Power Switch SYS_PWR ADAP_IN BK_VDD 1.5V Buck Switching Regulator (Buck1) BK_O BK_LX (1.5V) PMIC_IN CLDO_O (1.2V) VDD_CORE 1.2V LDO RFLDO_O (1.28V) VCC_RF SAR_VDD 5.
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BTZ-983H Power Management Unit Figure 5-3. Ambient Detection Circuit VDD_IO R1 1M/1% SK1_AMB_DET C1 1 µ F, 16V R2 86.6k/1% TR1 100k Thermistor: Murata NCP15WF104F Note: The thermistor must be placed close to the battery in the user application for accurate temperature measurements and to enable the thermal shutdown feature. The following figures show SK1 and SK2 channel behavior. Figure 5-4.
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BTZ-983H Power Management Unit Figure 5-5. SK2 Channel 5.3 LED Drivers The BTZ-983H module has two LED drivers to control external LEDs. The LED drivers provide enough sink current (16- step control and 0.35 mA for each step) and the LED can be connected directly to the BTZ-983H module. The LED settings can be configured by using the Config Tool. The following figure illustrates the LED drivers in the BTZ-983H module. Figure 5-6.
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BTZ-983H Application Information 6. Application Information 6.1 Power On/Off Sequence In Embedded mode, the MFB button is used to turn on and turn off the system. For Host mode, refer to 6.6 Host MCU Interface Over UART. The following figure illustrates the system behavior (Embedded mode) upon a MFB press event to turn on and turn off the system. Figure 6-1.
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BTZ-983H Application Information 6.2 Reset The Reset logic generates proper sequence to the device during Reset events. The Reset sources include external Reset, power-up Reset, and Watchdog Timer (WDT). The IS2083 SoC provides a WDT to Reset the chip. In addition, it has an integrated Power-on Reset (POR) circuit that resets all circuits to a known Power On state. This action can also be driven by an external Reset signal, which is used to control the device externally by forcing it into a POR state.
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BTZ-983H Application Information 6.3 Configuring and Programming 6.3.1 Test Mode The BTZ-983H module can be configured by using the Config Tool and the firmware is programmed by using the isUpdate tool. The following table provides the settings for configuring the BTZ-983H module for Test mode or Application mode. Table 6-1.
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BTZ-983H Application Information ...........continued 6.3.2.1 Pin Name Pin Type Description GND P Ground pin TCK_CPU I Primary programming pin pair: Serial Clock TDI_CPU I/O Primary programming pin pair: Serial Data Serial Program Clock (TCK_CPU) TCK_CPU is the clock that controls the TAP controller update and the shifting of data through the instruction or selected data registers. TCK_CPU is independent of the processor clock, with respect to both frequency and phase. 6.3.2.
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BTZ-983H Application Information Note: 1. This table reflects the default IO assignment for the turn-key solution. The GPIOs are user configurable. 2. GPIO P3_4 is used to enter Test mode during reset. If the user wants to use this pin to control external peripherals, care must be taken to ensure this pin is not pulled LOW and accidentally enters Test mode. 3. Microchip recommends to reserve UART port (P8_5 and P8_6) for Flash download in Test mode during production. 4.
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BTZ-983H Application Information Figure 6-7. BTZ-983H Module in I2S Slave Mode BTZ-983H External DSP/ Codec BCLK SCLK1 DACLRC RFS1 ADCDAT DR1 DACDAT DT1 Note: Use the Config Tool to configure the BTZ-983H module as a master/slave. 6.6 Host MCU Interface Over UART The BTZ-983H module supports UART commands, which enable an external MCU to control the BTZ-983H module. The following figure illustrates the UART interface between the BTZ-983H module and an external MCU.
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BTZ-983H Application Information Figure 6-9. Timing Sequence of Power On/Off 1 ms > 1s BAT_IN SYS_PWR MCU state Power On idle /initial Power On Power Off Power On idle any 400 ms PWR (MFB) 20 ms RST_N 2s UART Command MCU sends UART command (UART_RX) Power On ACK Bluetooth response UART state (UART_TX) MCU sends power Off UART Command ACK Keep all Bluetooth and MCU connection to low level ACK Figure 6-10.
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BTZ-983H Application Information Figure 6-11. Timing Sequence of Power Off State BTZ-983H sends power Off ACK BAT_IN +4V PWR (MFB) MCU sends RST_N BK_OUT LDO31_VO UART Bus 2s 1s Timing sequence of power Off state: • For a byte write: 0.01 ms x 32 clock x 2 = 640 μs. • It is recommended to have ramp-down time more than 640 μs during the power Off sequence to ensure safe operation of the device. Figure 6-12.
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BTZ-983H Application Information Figure 6-13. Reset Timing Sequence in No Response From Module to Host MCU PWR (MFB) MCU sends UART command UART Command BTZ-983H UART If no response UART Command Reset 5000 ms 5000 ms 5000 ms 5000 ms 5000 ms If the BTZ-983H module does not respond to the host MCU’s UART command, the MCU re-sends the UART command. If the BTZ-983H module does not respond within 5 secs, the MCU forces the system to reset.
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BTZ-983H Physical Dimensions 7. Physical Dimensions The following figures illustrate the PCB dimension and the recommended PCB footprint of the BTZ-983H module. Figure 7-1.
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BTZ-983H Electrical Specifications 8. Electrical Specifications This section provides an overview of the BTZ-983H stereo audio module electrical characteristics. The following table provides the absolute maximum ratings for the BTZ-983H module. Table 8-1. Absolute Maximum Ratings Parameter Min. Typ. Max. Unit Ambient temperature under bias -40 — +85 °C Storage temperature -40 — +150 °C Battery input voltage (BAT_IN) — — +4.
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BTZ-983H Electrical Specifications ...........continued Parameter Min. Typ. Max. Unit Threshold voltage — 1.6 — V 1. These parameters are characterized, but not tested on production device. Table 8-4. Battery Charger (1) Parameter Min. Typ. Max. Unit Adapter input voltage (ADAP_IN) 4.6(2) 5.0 5.5 V — 3 4.5 mA — 350 — mA 175(4) — mA Supply current to charger only Maximum battery fast charge current Headroom(3) > 0.7V (ADAP_IN = 5V) Headroom = 0.3V to 0.7V — (ADAP_IN = 4.
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BTZ-983H Electrical Specifications Table 8-6. LED Driver (1) Parameter Min. Typ. Max. Unit Open-drain voltage — — 3.6 V Programmable current range 0 — 5.25 mA Intensity control — 16 — step Current step — 0.35 — mA Power-down open-drain current — — 1 μA Shutdown current — — 1 μA 1. These parameters are characterized, but not tested on production device. Table 8-7. Audio Codec Analog-to-Digital Converter (1,4) Parameter (Condition) Min. Typ. Max.
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BTZ-983H Electrical Specifications ...........continued Parameter (Condition) Min. Typ. Max. Unit Digital gain -54 — 4.85 dB Digital gain resolution — 2 to 6 — dB Analog gain -28 — 3 dB Analog gain resolution — 1 — dB Output voltage full-scale swing (AVDD = 1.8V) 495 742.5 — mV/rms Maximum output power (16Ω load) — 34.5 — mW Maximum output power (32Ω load) — 17.2 — mW Allowed load Resistive 16 — — Ω Capacitive — — 500 pF 0.15 0.02 0.
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BTZ-983H Electrical Specifications Table 8-10. Transmitter Section Class 2 (LPA Configuration) for BDR and EDR (1,4) Parameter(2,3) Bluetooth Frequency Specification (MHz) Min. Typ. Max. Unit Transmit power BDR -6 to 4 2402 -1.5 -0.5 1.5 dBm 2441 -1.5 -0.5 1.5 dBm 2480 -1.5 -0.5 1.5 dBm 1. 2. 3. 4. These parameters are characterized, but not tested on production device. The RF transmit power is the average power measured for the mid-channel (Channel 39).
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BTZ-983H Electrical Specifications Table 8-12. BTZ-983H System Current Consumption(1,2,3,6,7,8) Modes Condition Role Packet Type Current (Typ.) Unit A2DP mode Internal codec, iOS Master Slave 2DH5/3DH5 12.05 mA Internal codec, Android™ Slave Master 3DH5 12.
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BTZ-983H Electrical Specifications ...........continued Modes Condition Role Packet Type Current (Typ.) Unit RF modes(5) Continuous TX mode Modulation OFF, PL0 ─ 59 mA Modulation ON, PL0 ─ 30 mA Modulation OFF, PL2 ─ 35.5 mA Modulation ON, PL2 ─ 22 mA Packet count disable ─ 49 mA Packet count enable ─ 38.5 mA Continuous RX mode 1. 2. 3. 4. 5. 6. 7. 8. 8.1 VBAT_IN = 3.8V; current measured across BAT_IN.
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BTZ-983H Electrical Specifications Figure 8-2. Timing Diagram for PCM Modes (Master/Slave) 1/fs SCLK1 RFS1 Right channel Left channel DR1/DT1 Bn-1 Bn-2 B1 Bn Bn-1 Bn-2 B1 Bn Word length The following figure illustrates the timing diagram of the audio interface. Figure 8-3. Audio Interface Timing Diagram tSCLKCH SCLK1 tSCLKCL tSCLKCY RFS1 tRFSH tRFSSU DR1 tDH The following table provides the timing specifications of the audio interface. Table 8-13.
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9.0 SOLDERING RECOMMENDATIONS Reflow profile requirements Parameter Specification Reference Average temperature gradient in preheating 1~2.5°C/s to 175°C equilibrium. Soak time Tsoak Time above 217°C (T1) Peak temperature in reflow t1 T2 Time at peak temperature t2 Temperature gradient in cooling FIGURE 9-1: REFLOW PROFILE Specification 120~180 seconds 45~90 seconds 250°C (– 0/+5°C) 6 seconds 6°C/second max.
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10. Ordering Information The following table provides the BTZ-983H module ordering information. Table 10-1. BTZ-983H Module Ordering Information Module Microchip IC Description Regulatory Certification BTZ-983H IS2083BM-232 Bluetooth 5.
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FCC Statement: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
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If the identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module, Contains FCC ID: 2AKCY-RL56BBLE. Co-location of this module with other transmitters that operate simultaneously are required to be evaluated using the multi-transmitter procedures.
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ISED Statement: This device contains licence-exempt transmitter(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions: (1) this device may not cause interference, (2) this device must accept any interference, including interference that may cause undesired operation of the device.