Ai-Thinker ESP32-A1S Manuale utente
ESP32-A1S Specification V2.3
Copyright © 2021 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
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ESP32-A1S Specification
Version V2.3
Copyright ©2021
ESP32-A1S Specification V2.3
Copyright © 2021 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
Page 2 of 20
Disclaimer and copyright notice
The information in this article, including the URL for reference, is subject to change
without notice.
The document is provided "as is" without any guarantee responsibility, including any
guarantee of marketability, suitability for a specific purpose or non-infringement, and
any guarantee mentioned elsewhere in any proposal, specification or sample. This
document assumes no responsibility, including any liability for infringement of any
patent rights arising from the use of the information in this document. This document
does not grant any license to use intellectual property rights, whether express or
implied, by estoppel or other means.
The test data obtained in this article are all obtained by Ai-Thinker's laboratory tests,
and the actual results may be slightly different.
The Wi-Fi Alliance member logo is owned by the Wi-Fi Alliance.
All trademark names, trademarks and registered trademarks mentioned in this article
are the property of their respective owners and are hereby declared.
The final interpretation right belongs to Shenzhen Ai-Thinker Technology Co., Ltd.
Notice
The contents of this manual may change due to product version upgrade or other
reasons. Shenzhen Ai-Thinker Technology Co., Ltd. reserves the right to modify the
contents of this manual without any notice or prompt. This manual is only used as a
guide. Shenzhen Ai-Thinker Technology Co., Ltd. makes every effort to provide
accurate information in this manual, but Shenzhen Ai-Thinker Technology Co., Ltd.
does not guarantee that the contents of the manual are completely error-free. And
recommendations do not constitute any express or implied guarantee.
ESP32-A1S Specification V2.3
Copyright © 2021 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
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Formulation / Revision / Abolition of CV
Version
Date
Formulation / Revision
Make
Verify
V2.2
2019.11.01
First development
Yiji Xie
Ning Guan
V2.3
2021.06.09
Update data
Peihong
Su
Ning Guan
ESP32-A1S Specification V2.3
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content
1. Product overview................................................................................................................... 5
1.1. Features......................................................................................错误！未定义书签。
2.Main parameters..................................................................................................................... 7
2.1.Electrical parameters................................................................................................... 7
2.2. Electrical characteristics.............................................................................................8
2.3. WIFI RF performance................................................................................................. 8
2.4. Bluetooth（BR）RF performance............................................................................ 9
2.5. Bluetooth（EDR）RF performance......................................................................... 9
2.6. BLE RF performance.................................................................................................. 9
2.7. Power consumption.................................................................................................... 9
3.Dimensions............................................................................................................................ 11
4.PIN definition......................................................................................................................... 12
5.Schematic diagram...............................................................................................................14
6.Design guide......................................................................................................................... 17
6.1. Antenna layout requirements.................................................................................. 17
6.2. Power supply............................................................................................................. 17
7.Reflow solder curve..............................................................................................................19
8.Packaging.............................................................................................. 错误！未定义书签。
9.Contact us..............................................................................................................................20
ESP32-A1S Specification V2.3
Copyright © 2021 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
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1. Product overview
ESP32-A1S is a Wi-Fi+BT voice module developed by Shenzhen Anxinke Technology
Co., Ltd. The module's core processor chip ESP32 integrates 2.4 GHz Wi-Fi and
Bluetooth dual mode, and the module also integrates ES8388 voice codec chip,
PSRAM and Flash chip. It can be widely used in offline voice products and various IoT
hardware terminal occasions.
ESP32 chip has industry-leading low-power performance and radio frequency
performance, supports Wi-Fi IEEE802.11b/g/n protocol and Bluetooth V4.2 complete
standard, including traditional Bluetooth (BR/EDR) and low energy Bluetooth (BLE) .
The chip is equipped with an Xtensa® 32-bit LX6 dual-core processor with a computing
power of up to 600 MIPS and a working frequency of up to 240 MHz. Support
secondary development without using other microcontrollers or processors. The chip
has built-in 520 KB SRAM, 448 KB ROM, 16KB RTC SRAM, and 1 Kbit eFuse. The
chip supports a variety of low power consumption working states, which can meet the
power consumption requirements of various application scenarios.
ES8388 is a low-power, cost-effective audio codec chip. It integrates 2 ADCs and 2
DACs, microphone amplifiers, headphone amplifiers, etc., which can be widely used in
various home smart devices, smart audio, story machine solutions And so on, is the
ideal solution for voice products.
The ESP32-A1S module provides a wealth of peripheral interfaces, including UART,
PWM, SPI, I2S, I2C, ADC, DAC, SDIO and multiple GPIOs.
ESP32-A1S Specification V2.3
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Figure 1 Main chip architecture diagram
1.1. Features
Support Wi-Fi 802.11b/g/n, 1T1R mode data rate up to 150Mbps
Support Bluetooth V4.2 complete standard, including traditional Bluetooth
(BR/EDR) and low energy Bluetooth (BLE)
Support standard Class-1, Class-2 and Class-3
Xtensa® 32-bit LX6 dual-core processor, computing power up to 600 MIPS
The chip has built-in 520 KB SRAM, 448 KB ROM, 16KB RTC SRAM, and 1
Kbit eFuse
Support 2 audio input and 2 audio output, integrated microphone amplifier
and headphone amplifier
Support UART/GPIO/ADC/DAC/PWM/I2C/I2S interface
Integrate 64Mb PSRAM
Using SMD-38 package
General AT commands can be used quickly
Support secondary development, integrated Windows and Linux development
environment
ESP32-A1S Specification V2.3
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2. Main parameters
List 1 Main parameter description
Model
ESP32-A1S
Package
SMD-38
Size
31.5*19.0*3.1(±0.2)mm
Antenna
Onboard PCB antenna / compatible with IPEX antenna interface
Spectrum
range
2400 ~ 2483.5MHz
Operating
temperature
-40 ℃~ 85 ℃
Storage
environment
-40 ℃~ 125 ℃, < 90%RH
Power
supply
Supply voltage 3.0V ~ 3.6V, supply current >500mA
Interface
UART/GPIO/ADC/PWM/I2C/I2S/microphone/headphone/speaker
Serial port
rate
Support 110 ~ 4608000 bps, the default is 115200 bps
WiFi
802.11b/g/n
Bluetooth
Bluetooth 4.2 BR/EDR and BLE standards
Safety
WEP/WPA-PSK/WPA2-PSK
2.1.Electrical parameters
The ESP32-A1S module is an electrostatic sensitive device, and special precautions
must be taken when handling it.
Figure 2 ESD Anti-static mark
ESP32-A1S Specification V2.3
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2.2. Electrical characteristics
List 2 Main parameter description
2.3. WIFI RF performance
List 3 Main parameter description
Description
Typical
Unit
Working frequency
2400 - 2483.5
MHz
Output Power
11n mode HT40, PA output power is
13±2
dBm
11n mode HT20, PA output power is
13±2
dBm
In 11g mode, the PA output power is
14±2
dBm
In 11b mode, PA output power is
18±2
dBm
Receiving sensitivity
CCK, 1 Mbps
≤-96
dBm
CCK, 11 Mbps
≤-88
dBm
6 Mbps (1/2 BPSK)
≤-92
dBm
54 Mbps (3/4 64-QAM)
≤-74
dBm
HT20 (MCS7)
≤-72
dBm
HT40 (MCS7)
≤-70
dBm
Parameters
Condition
Min
Typical
Max
Unit
Voltage
VDD
3.0
3.3
3.6
V
I/O
VIL/VIH
-
-0.3/0.75VDD
-
0.25VDD/VDD+0.3
V
VOL/VOH
-
N/0.8VIO
-
0.1VIO/N
V
ESP32-A1S Specification V2.3
Copyright © 2021 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
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2.4. Bluetooth（BR）RF performance
List 4 Main parameter description
Description
Typical
Unit
Output Power
Transmit power
Typical 8±2
dBm
Receiving sensitivity Bluetooth low energy 1M
≤-89
dBm
2.5. Bluetooth（EDR）RF performance
List 5 Main parameter description
Description
Typical
Unit
Output Power
Transmit power
Typical 8±2
dBm
Receiving sensitivity Bluetooth low energy 1M
≤-89
dBm
2.6. BLE RF performance
List 6 Main parameter description
Description
Typical
Unit
Output Power
Transmit power
Typical 8±2
dBm
Receiving sensitivity Bluetooth low energy 1M
≤-94
dBm
2.7. Power consumption
The following power consumption data is based on 3.3V power supply, 25°C
ESP32-A1S Specification V2.3
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ambient temperature, and measured with an internal voltage regulator.
All measurements are done at the antenna interface without SAW filter.
All emission data is based on 50% duty cycle, measured in continuous emission
mode.
List 7 Main parameter description
Mode
Min
Typical
Max
Unit
Transmit 802.11b, CCK 1Mbps,
POUT=+19.5dBm
-
240
-
mA
Transmission 802.11g, OFDM
54Mbps, POUT = +16dBm
-
190
-
mA
Transmit 802.11n, MCS7, POUT =
+14dBm
-
180
-
mA
Receive 802.11b, the packet
length is 1024 bytes
-
95
-
mA
Receive 802.11g, the packet
length is 1024 bytes
-
95
-
mA
Receive 802.11n, the packet
length is 1024 bytes
-
93
-
mA
Modem-Sleep①
-
20
-
mA
Light-Sleep②
-
130
-
μA
Deep-Sleep③
-
5
-
μA
Power Off
-
1
-
μA
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