IS2021

The IS2021 Stereo Audio Chip is a compact, highly integrated, CMOS single-chip RF and baseband IC for Bluetooth v4.1 with Enhanced Data Rate 2.4GHz applications. This chip is fully compliant with Bluetooth specification and completely backward-compatible with Bluetooth 3.0, 2.0 or 1.2 systems.  It incorporates Bluetooth 1M/2M/3Mbps RF, single-cycle 8bit MCU, TX/RX modem, 5-port memory controller, task/hopping controller, UART interface, and Microchip’s own Bluetooth software stack to achieve the required BT v4.1 with EDR functions.

To provide the superior audio and voice quality, it also integrates a DSP co-processor, a PLL, and a CODEC dedicated for voice and audio applications.  For voice, not only basic CVSD encoding and decoding but also enhanced noise reduction and echo cancellation are implemented by the built-in DSP to achieve better quality in both sending and receiving sides. For the enhanced audio applications, SBC/AAC_LC decoding functions can be also carried out by DSP to satisfy Bluetooth A2DP requirements.

In addition, to minimize the external components required for portable devices, a battery voltage sensor, battery charger, a switching regulator and LDO are integrated to reduce system BOM cost for various Bluetooth applications.

Features
  • Compliant with Bluetooth Specification v.4.1 (EDR) in 2.4 GHz ISM band
  • It supports the following profiles :  HFP 1.6  HSP 1.1  A2DP 1.2  AVRCP 1.5  SPP 1.0  PBAP 1.0
  • HFP 1.6
  • HSP 1.1
  • A2DP 1.2
  • AVRCP 1.5
  • SPP 1.0
  • PBAP 1.0
  • 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 4.1 (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
  • Supports 64 kb/s A-Law or µ-Law PCM format, or CVSD (Continuous Variable Slope Delta Modulation) for SCO channel operation
  • Noise suppression
  • Echo suppression
  • SBC and optional AAC decoding
  • Packet loss concealment
  • Build-in four languages (Chinese/ English/ Spanish/ French) voice prompts and 20 events for each one (This function can be set up in UI tool.)
  • 20 bit DAC and 16 bit ADC codec
  • 98dB SNR DAC playback
  • 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
  • High speed HCI-UART (Universal Asynchronous Receiver Transmitter) interface (up to 921600bps)
  • 5 x 6.5 mm2 48QFN package
Parameter
Parameter Name Value Value
Bluetooth Classic-Data/SPP Yes Yes
Bluetooth Classic-Audio Yes Yes
Audio Channels Stereo Stereo
Analog Audio Out Yes Yes
MIC-in 1 1
I2C 1 1
TX Power +4dBm +4dBm
GPIO 8 8
Pin Count 48 48
Package Type QFN QFN
Package Size 5 x 6.5 mm 5 x 6.5 mm
Min Temp Range -20C -20C
Max Temp Range 70C 70C
Op Voltage Min 3.0V 3.0V
Op Voltage Max 4.25V 4.25V
Documents
IS202x DatasheetData Sheets07/13/20152730KB
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
IS2021S-2030.18640048VQFN5x6.5x0.9mmMatte Tine3
IS2021S-203-TRAY0.51225548VQFN5x6.5x0.9mmMatte Tine3
IS2021S-0020.18640048VQFN5x6.5x0.9mmMatte Tine3
IS2021S-002-TRAY0.51225548VQFN5x6.5x0.9mmMatte Tine3
IS202x Datasheet IS2025