Adafruit LTC4311 I2C Extender / Active Terminator 1

Adafruit LTC4311 I2C Extender / Active Terminator 2

Adafruit LTC4311 I2C Extender / Active Terminator 3

Adafruit LTC4311 I2C Extender / Active Terminator 4

Adafruit LTC4311 I2C Extender / Active Terminator 5

Adafruit LTC4311 I2C Extender / Active Terminator 6

Adafruit LTC4311 I2C Extender / Active Termin

Adafruit

Adafruit LTC4311 I2C Extender / Active Terminator

Name: Adafruit LTC4311 I2C Extender / Active Terminator
Brand: Adafruit
SKU: AF4756
Price: 12.95 EUR
Availability: InStock
Rating: 5.0 (1 reviews)

Item No.: AF4756

HAN: 4756

EAN: 4060137066542

HS Code: 8538909189

Herkunftsland: US

Lagerstufe: Tier3

5.0 / 1 review

12,95 €

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Net: 10,88 €

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Product Description

DESCRIPTION

I2C stands for Inter-Integrated-Circuit communications, its meant for short distances on a PCB or subassembly. But, hey, we're engineers and we like to push the limits of technology, right? So why not try to have I2C run over a meter long cable, or even longer? Well, if you try to do that you'll quickly find that the length of the cable adds capacitance and resistance that slows down the open-drain pullups used in I2C, making it hard to use 100KHz+ clock speeds. You could try slowing down your I2C clock to 1 KHz...or you could use an Adafruit LTC4311 active terminator like this one!

Using this board is easy: connect it to your I2C bus at the beginning of the chain (if you don't have a massively long cable, you can also try at the end of the chain). When the chip is powered and enabled, it will watch the SCL and SDA lines. When it sees them being pulled up through the I2C resistors, it will activate and dump in some current to give it a boost thru to the top power rail.

You can now achieve much faster data rates without having to noodle with resistors, and over long cables. We ran a 400 KHz OLED over 3 meters of phone wire with ease. With a 100KHz signal, we even ran a BME680 over 100 feet of Ethernet (about 3000pF round trip!), and had an OLED display the sensor details.

Runs with any bus voltage, from 1.6V to 5.5V and up to 400 KHz SCL speed, with cables up to 4000pF. No special firmware, software, or configuration required. Simply plug the power, ground, SCL and SDA connectors into your bus and watch as your rise times magically turn sawtooths into square waves.

To get you going fast, we spun up a custom made PCB in the STEMMA QT form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the LTC4311 or to chain it with a wide range of other sensors and accessories using a compatible cable.

TECHNICAL DETAILS

LTC4311 Features & Specifications

Improves I2C Bus Rise Time Transition
Ensures Data Integrity with Multiple Devices on the I2C Bus.
Wide Supply Voltage Range: 1.6V to 5.5V
Improves Low State Noise Margin
Up to 400kHz Operation
Auto Detect Low Power Standby Mode
Low (<5?A) Supply Current Shutdown
Does Not Load Bus When Disabled or Powered Down
Strong Slew Limited Pull-up Current
±8kV Human Body Model ESD Ruggedness

Technical documents / Downloads

WikiManufacturer WikiOpen

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Total entries: 1

15.06.2024 Verified purchase Voucher received

funktioniert einwandfrei

I2C Bus mit 5m abgeschirmten Kabel verlängert, bisher keine Störungen (ich hab aber noch nicht mit dem Ozilloslop gemessen). Auch nach 6 Monaten, keine Störungen

Thomas R

Wiki

Manufacturer according to GPSR
Adafruit Industries LLC, Varick St. 150, 10013 New York, New York, Vereinigte Staaten, [email protected], https://eckstein-shop.de/Adafruit-Marken