ADNS-3050 optical navigation sensor pinout

The ADNS-3050 senses motion relative to a surface and reports signed X/Y displacement over SPI. It uses an external red LED and lens assembly.

Optical DIP-8

8 contacts Current package

Avago Technologies ·

Top view as in Figure 1. Locate pin 1 at the lower left beside the index mark.

Supply input · Power

Device supply. Place the bypass capacitor close to this pin.

Avago AV02-2886EN (July 2011), Figures 1, 8–9, Tables 2–4 and power-up reset procedure. Manufacturer PDF hosted by DigiKey.

Pin	Signal	Direction	Function
1	MISO Output	Output	SPI data from sensor to host. High impedance when deselected after the documented delay.
2	LED LED control	LED control	Connect to the external illumination circuit in the manufacturer reference design.
3	MOTION Output	Output	Active-low interrupt while unread motion data is available.
4	NCS Input	Input	Active-low SPI chip select. Keep high during transactions with other devices.
5	SCLK Input	Input	SPI serial clock. Observe address-to-data and chip-select timing.
6	GND Supply return	Supply return	Connect to the common ground plane or bench return.
7	VDD Supply input	Supply input	Device supply. Place the bypass capacitor close to this pin.
8	MOSI Input	Input	SPI data from host to sensor.

Reads send an address byte, pause for the specified address-to-data delay, and then clock the returned byte.

Use the active-low signal as a host interrupt, particularly in low-power operation.

Parameter	Limit	Conditions and source
Sensor supply2.8–3.0 V	2.8–3.0 V	Recommended operating range. Match host logic thresholds to the sensor and use level translation if required. Avago AV02-2886EN (July 2011), Figures 1, 8–9, Tables 2–4 and power-up reset procedure. Manufacturer PDF hosted by DigiKey.
SPI frequency1 MHz maximum	1 MHz maximum	Observe the separate 4 µs minimum read address-to-data delay. Avago AV02-2886EN (July 2011), Figures 1, 8–9, Tables 2–4 and power-up reset procedure. Manufacturer PDF hosted by DigiKey.
Lens reference plane to surface2.3–2.5 mm	2.3–2.5 mm	With the recommended optical assembly. Use the mechanical drawings to set the stack-up. Avago AV02-2886EN (July 2011), Figures 1, 8–9, Tables 2–4 and power-up reset procedure. Manufacturer PDF hosted by DigiKey.

The map follows the 8-pin DIP optical sensor and Avago’s HLMP-EG3E red LED design.

ADNS-3050 manufacturer documentation· Avago AV02-2886EN (July 2011), Figures 1, 8–9, Tables 2–4 and power-up reset procedure. Manufacturer PDF hosted by DigiKey.