IS2020/21/23/25 SoC
®
Bluetooth 4.1 Stereo Audio SOC
Packet loss concealment
Features
Build-in four languages (Chinese/ English/
System Specification
Compliant with Bluetooth Specification v.4.1
(EDR) in 2.4 GHz ISM band
It supports following profiles :
- HFP 1.6
Spanish/ French) voice prompts and 20 events
for each one (This function can be set up in
“IS20XXS_UI” tool.)
Support SCMS-T
- HSP 1.1
Audio Codec
- A2DP 1.2
- AVRCP 1.5
- SPP 1.0
- PBAP 1.0
20 bit DAC and 16 bit ADC codec
98dB SNR DAC playback
Built-in 2 channel 2.3W class-D amplifier for a
4Ω speaker (for IS2025S only)
Baseband Hardware
16MHz main clock input
Peripherals
Built-in internal ROM for program memory
Built-in Lithium-ion battery charger (up to
350mA)
Support to connect to two hosts ( phones,
tablets…) with HFP or A2DP profiles
simultaneously
Integrate 3V, 1.8V configurable switching
regulator and LDO
Adaptive Frequency Hopping (AFH) avoids
occupied RF channels
Built-in ADC for battery monitor and voltage
sense.
Fast Connection supported
A line-in port for external audio input
Two LED drivers
RF Hardware
Fully Bluetooth 4.1 (EDR) system in 2.4 GHz
ISM band.
Flexible HCI interface
High speed HCI-UART (Universal
Asynchronous Receiver Transmitter) interface
(up to 921600bps)
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.
Package
5x6.5mm2 48QFN package (IS2021S)
7x7mm2 56QFN package (IS2020S, IS2023S)
8x8mm2 68QFN package (IS2025S)
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.
Description
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.
Audio processor
Support 64 kb/s A-Law or -Law PCM format,
or CVSD (Continuous Variable Slope Delta
Modulation) for SCO channel operation.
It incorporates Bluetooth 1M/2M/3Mbps RF,
single-cycle 8bit MCU, TX/RX modem, 5-port
memory controller, task/hopping controller,
Noise suppression
Echo suppression
SBC and optional AAC decoding
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