ESP32 PICO D4 Datasheet: Analysis

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:

Mobile devices
Wearable electronics
Medical equipment
Wi-Fi-enabled toys
Sensors
Cameras
Audio headsets
Home automation
Smart buildings
Internet of Things products

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)
	Protocols	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.

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