The board comes with all surface-mount parts pre-soldered. For breadboard use, the included header-strip should be soldered on:
First connect VDD and GND. These boards will work with either a 3.3v or a 5v supply. The diagram below shows connection to the Arduino 5v pin.
I2C requires just 2 pins to communicate. These can be shared with other I2C devices. For R3 and later Arduinos (including MEGA and DUE models), connect SDA->SDA and SCL->SCL.
For older Arduino boards without dedicated SDA and SCL pins, connect as shown below. (For older Arduino Megas, SDA and SCL are on pins 20 and 21)
The ADS11x5 chips have a base 7-bit I2C address of 0x48 (1001000) and a clever addressing scheme that allows four different addresses using just one address pin (named ADR
for ADdRess). To program the address, connect the address pin as follows:
- 0x48 (1001000) ADR -> GND
- 0x49 (1001001) ADR -> VDD
- 0x4A (1001010) ADR -> SDA
- 0x4B (1001011) ADR -> SCL
The following diagram shows one board addressed as 0x48:
By assigning each board a different address, up to 4 boards can be connected as below: