12비트 ADS8665 ADC 모듈
(ADC 22 CLICK)
개요
- 본 제품은 12비트 ADS8665 ADC 모듈입니다.
- ADS8665 ADC 칩을 장착하고 있는 제품입니다.
- 12비트 분해능을 가지고 있으며, SPI 인터페이스를 가지고 있습니다.
- ADC 22 Click is a compact add-on board with a high-performance data converter. This board features the ADS8665, a high-speed single-supply SAR ADC data acquisition system with programmable bipolar input ranges from Texas Instruments. It features a high-speed, high-precision A/D converter based on successive approximation (SAR). This 12-bit resolution ADC with an integrated analog front-end (AFE) input driver circuit can achieve speeds of up to 500ksps. This Click board™ makes the perfect solution for the development of analog input modules, mixed modules (AI, AO, DI, DO), data acquisition (DAQ), trackside signaling and control, and more.
특징
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HOW DOES IT WORK?
ADC 22 Click is based on the ADS8665, a 12-bit high-speed single-supply SAR ADC data acquisition system with programmable bipolar input ranges from Texas Instruments. This ADC operates on a single 5V supply used from the mikroBUS™ power rail and supports true bipolar input ranges of ±12.288V, ±6.144V, ±10.24V, ±5.12V, and ±2.56V, as well as unipolar input ranges of 0 to 12.288V, or 10.24V, 6.144V, and 5.12V. The gain and offset errors are accurately trimmed within specified values to ensure a high DC precision for each input range. The input range selection is made by software.
The ADC features an overvoltage protection circuit of up to ±20V and an on-chip 4.096V reference with extremely low-temperature drift. In addition, ADC 22 Click is equipped with an external voltage reference REF header which allows you to apply voltages to ADS8665 ADC from 4.046 up to 4.146V. You can separate the grounds for external voltage reference usage by desoldering the NET TIE R2 resistor.
The ADC 22 Click features alarm functions that consist of an input alarm and an AVDD supply alarm. The alarm function should be enabled over the software, thus enabling both alarm functions by default. You can later separately disable one of them. Another neat feature of this Click board™ is the RVS multi-function output pin, which regarding the CS pin status, can reflect the status of the internal ADCST signal or the status of the RVS depending on the output protocol selection. The device allows the output clock on the RVS pin to be synchronous to either the external clock provided on the SCLK pin or to the device's internal clock. In all SRC modes of operation, the RVS pin provides the output clock, synchronous to the device data output. The RVS pin can be monitored for timing benefits.
ADC 22 Click uses a standard 4-Wire SPI serial interface to communicate with the host MCU supporting high serial clock frequency. It also supports an enhanced SPI interface (multiSPI) that maximizes the sampling rate even with lower-speed host controllers. The alarm interrupt is available on the INT pin, and you can reset the device over the RST pin. The RVS pin is a multi-function pin for the serial interface.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type ADC Applications Can be used for the development of analog input modules, mixed modules (AI, AO, DI, DO), data acquisition (DAQ), trackside signaling and control, and more On-board modules ADS8665 - SAR ADC data acquisition system with programmable bipolar input ranges from Texas Instruments Key Features High-speed, high-precision, high-performance, based on a successive approximation (SAR), up to 500ksps sampling rate, supports true bipolar and unipolar inputs in wide ranges, supports multiSPI interface backward-compatible to the standard SPI protocol, alarm function, and more Interface SPI ClickID Yes Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V