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ESP32 PICO D4 Datasheet: Analysis

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Image of Espressif Systems’s ESP32-PICO-D4 SiP module

 

Image of Espressif Systems’s ESP32-PICO-D4 SiP module (Source: DigiKey)

A system-in-package (SiP) module is an advanced electronic packaging technology that integrates multiple integrated circuits (ICs) or other components. It combines various functions like microprocessors, memory, sensors, and communication interfaces into a compact and highly integrated module. SiP modules are crucial in miniaturizing electronic devices, improving performance, optimizing power consumption, and developing increasingly advanced and feature-rich electronics.

Espressif Systems is a leader in manufacturing SiP modules. One of their popular modules, ESP32-­PICO­-D4, is described in this datasheet.

ESP32-PICO-D4: Applications and Features:

The ESP32-PICO-D4 is a SiP module that provides Wi-Fi and Bluetooth functionalities and is based on the ESP32 chip, which is a single 2.4 GHz Wi-Fi and Bluetooth combo chip using ultra-low power technology. In one package, the module integrates peripheral components, such as crystal oscillators, flash, filter capacitors, and RF matching links. Module welding and testing are not required.

ESP32-PICO-D4 Applications:

As the list above indicates, the ESP32-PICO-D4 is a versatile SiP module that can be used in a variety of products.

Using the ESP32-PICO-D4 Datasheet

Using ESP32-PICO-D4, you can improve control efficiency and reduce supply chain complexity. This SiP module is well suited for applications that require low power consumption, compact size, and strong performance, including wearable electronics, medical equipment, sensors, and other IoT applications.

Before designing your PCB, it is crucial to consult the ESP32-PICO-D4 datasheet for necessary specifications, which are included below.

Important ESP32-PICO-D4 Specifications

ESP32-PICO-D4 DATASHEET SPECIFICATIONS

Categories

Items

Specifications

Certifications

Bluetooth certification

BQB

Wi-Fi

Protocols

802.11 b/g/n (802.11n up to 150 Mbps)

A-MPDU and A-MSDU aggregation and 0.4 µs guard interval support

Center frequency range of operating channel

2412 ~ 2484 MHz

Bluetooth

Protocols

Bluetooth V4.2 BR/EDR and Bluetooth LE specification

Radio

NZIF receiver with –97 dBm sensitivity

Class-1, class-2 and class-3 transmitter

AFH

Audio

CVSD and SBC

Hardware

Module interfaces

ADC, DAC, touch sensor, SD/SDIO/MMC Host Controller, SPI, SDIO/SPI Slave Controller, EMAC, motor PWM, LED PWM, UART, I2C, I2S, infrared remote controller, GPIO, pulse counter, TWAI® (compatible with ISO 11898-1, i.e.CAN Specification 2.0)

On-chip sensor

Hall sensor

Integrated crystal

40 MHz crystal

Integrated SPI flash

4 MB

Operating voltage/Power supply

3.0 V ~ 3.6 V

Operating current

Average: 80 mA

Minimum current delivered by power supply

500 mA

Operating ambient temperature

–40 °C ~ 85 °C

Package size

(7.000±0.100) mm×(7.000±0.100) mm×(0.940±0.100) mm

Moisture sensitivity level

Level 3

ESP32-PICO-D4 Datasheet Specifications (Source: Espressif Systems)

ESP32-PICO-D4 Pin Layout and Definitions

The pin layout of the ESP32-PICO-D4 is shown in the figure below.

ESP32-­PICO-­D4 Pin Layout – Top View (Source: Espressif Systems)

The ESP32-PICO-D4 module has 48 pins. See pin definitions below:

Name

No.

Type

Function

VDAA

1

P

Analog power supply (2.3 V ~ 3.6 V)

LNA_IN

2

I/O

RF input and output

VDDA3P3

3

P

Analog power supply (2.3 V ~ 3.6 V)

VDDA3P3

4

P

Analog power supply (2.3 V ~ 3.6 V)

SENSOR_VP

5

I

GPIO36, ADC1_CH0, RTC_GPIO0

SENSOR_CAPP

6

I

GPIO37, ADC1_CH1, RTC_GPIO1

SENSOR_CAPN

7

I

GPIO38, ADC1_CH2, RTC_GPIO2

SENSOR_VN

8

I

GPIO39, ADC1_CH3, RTC_GPIO3

EN

9

I

High: On; enables the module

Low: Off; the module powers off

Note: Do not leave this pin floating.

IO34

10

I

GPIO34, ADC1_CH6, RTC_GPIO4

IO35

11

I

GPIO35, ADC1_CH7, RTC_GPIO5

IO32

12

I/O

GPIO32, 32K_XP (32.768 kHz crystal oscillator input), ADC1_CH4,

TOUCH9, RTC_GPIO9

IO33

13

I/O

GPIO33, 32K_XN (32.768 kHz crystal oscillator output), ADC1_CH5,

TOUCH8, RTC_GPIO8

IO25

14

I/O

GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0

IO26

15

I/O

GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1

IO27

16

I/O

GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV

IO14

17

I/O

GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK,

HS2_CLK, SD_CLK, EMAC_TXD2

IO12

18

I/O

GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ,

HS2_DATA2, SD_DATA2, EMAC_TXD3

VDD3P3_RTC

19

P

Input power supply for RTC IO (3.0 V ~ 3.6 V)

IO13

20

I/O

GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID,

HS2_DATA3, SD_DATA3, EMAC_RX_ER

IO15

21

I/O

GPIO15, ADC2_CH3, TOUCH3, RTC_GPIO13, MTDO, HSPICS0,

HS2_CMD, SD_CMD, EMAC_RXD3

IO2

22

I/O

GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0,

SD_DATA0

IO0

23

I/O

GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1,

EMAC_TX_CLK

IO4

24

I/O

GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1,

SD_DATA1, EMAC_TX_ER

IO16

25

I/O

GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT

VDD_SDIO

26

P

Output power supply.

IO17

27

I/O

GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180

SD2

28

I/O

GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD

SD3

29

I/O

GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD

CMD

30

I/O

GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS

CLK

31

I/O

GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS

SD0

32

I/O

GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS

SD1

33

I/O

GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS

IO5

34

I/O

GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK

IO18

35

I/O

GPIO18, VSPICLK, HS1_DATA7

IO23

36

I/O

GPIO23, VSPID, HS1_STROBE

VDD3P3_CPU

37

P

Input power supply for CPU IO (1.8 V ~ 3.6 V)

IO19

38

I/O

GPIO19, VSPIQ, U0CTS, EMAC_TXD0

IO22

39

I/O

GPIO22, VSPIWP, U0RTS, EMAC_TXD1

U0RXD

40

I/O

GPIO3, U0RXD, CLK_OUT2

U0TXD

41

I/O

GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2

IO21

42

I/O

GPIO21, VSPIHD, EMAC_TX_EN

VDDA

43

P

Analog power supply (2.3 V ~ 3.6 V)

XTAL_N_NC

44

–

NC

XTAL_P_NC

45

–

NC

VDDA

46

P

Analog power supply (2.3 V ~ 3.6 V)

CAP2_NC

47

–

NC

CAP1_NC

48

–

NC

ESP32-PICO-D4 Pin Description (Source: Espressif Systems)

Optimizing Your ESP32-PICO-D4 PCBA Design

You can find detailed information, such as performance characteristics, on the ESP32-PICO-D4 datasheet in addition to the data presented above.

For the best ESP32-PICO-D4 implementation, the datasheet should be used along with  accurate CAD models to help ensure optimal PCBA development.

ESP32-PICO-D4 CAD data from UL

For electronic product development to be efficient, your PCBA design and manufacturing stages must be collaborative and supportive. You should begin with a reliable component library where you can be assured of the accuracy of the data and models.

If you’re looking for CAD models for common components or design tips like how to best use the ESP32-PICO-D4 datasheet, Ultra Librarian helps by compiling all your sourcing and CAD information in one place.

Working with Ultra Librarian sets up your team for success to ensure streamlined and error-free design, production, and sourcing. Register today for free.

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