디지털 가변저항 -MAX5387, I2C
(DIGI POT 11 CLICK)
개요
- 본 제품은 디지털 가변저항 -MAX5387, I2C 입니다.
- MAX5387칩을 기반으로 디자인된 제품으로 256 tap을 가지고 있습니다.
- I2C 인터페이스로 제어되는 포텐셔미터로 끝에서 끝의 저항값은 50K오옴입니다.
- 3.3V 시스템과 동작합니다.
특징
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DIGI POT 11 Click as its foundation uses a double pack of the MAX5387, a dual volatile, low-voltage linear taper digital potentiometer from Analog Devices, with which four digitally controlled potentiometers are realized with end-to-end resistance values of 50kΩ. The potentiometers consist of 255 fixed resistors in series between appropriate H and L terminals, providing a low 35ppm/ºC end-to-end temperature coefficient. The potentiometer wiper (W) terminals are programmable to access any one of the 256 tap points on the resistor string.
This Click board™ communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of 400kHz. The potentiometers are programmable independently of each other. The MAX5387 has a 7-bit slave address with the first five MSBs fixed to 01010. The address pins A0 and A1 of both potentiometers are programmed by the user and determine the value of the last three LSBs of the slave address, which can be selected by positioning onboard SMD jumpers labeled as ADDR SEL, in U1 or U2 part, to an appropriate position marked as 0 or 1.
The I2C interface contains a shift register that decodes the command and addresses bytes, routing the data to the appropriate control registers. Data written to a control register immediately updates the wiper position. In the beginning, wipers A and B always power up in mid-position.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Digital potentiometer Applications Can be used as a mechanical potentiometer replacement for the portable consumer market and battery-backup industrial applications On-board modules MAX5387 - dual volatile linear taper digital potentiometer from Analog Devices Key Features Double dual potentiometers, 256-tap linear taper positions, single 3.3V supply, low power consumption, 50kΩ end-to-end resistance, I2C interface, Power-On sets wiper to midscale, and more Interface I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V
문서
연관제품
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