This reference design showcases a flexible Analog IO solution for Smart Grid devices like Protection Relays and RTUs that also need to communicate with other devices on the grid that use the analog IO such as voltage (5V to 10V DC) or current (4-20mA). This solution enables both types of IO as well as a power digital relay drive. SPI and I2C communication interfaces are available on this module for communication to the processor.
Features
• Analog I/O handled includes:
o Current Input 0-20mA / 0-24mA / 4-20mA DC
o Voltage Input 0-5V DC / 0-10V DC
• Excellent accuracy • High Sampling rate (up to 500kSPS)
• Simplifies connectivity to MCU with SPI interface
• Analog Output handling includes:
o Flexible solution – configurable
o Current/Voltage outputs
• DAC Daisy Chaining minimizes connectivity to MCU
• Digital Output handling includes:
o 4x better power efficiency with respect to ULN series
Parts Include:
ADS8684 SAR ADC with 16 bits, 4 channels, 500 kSPS, and bipolar inputs off +5V supply
DAC8760 Single-Channel, 16-Bit, Programmable Current/Voltage Output DAC for 4-20mA Current Loop Applications
OPA188 Precision, Low Noise, Rail-to-Rail Output, 36V Zero-Drift Operational Amplifier
TCA6408A Low-Voltage 8-Bit I2C and SMBus I/O Expander
TPL7407L 40V, 7-Channel NMOS Array, Low Side Driver
TPS7A1633 60V, 5μA IQ Low-Dropout 100mA Linear Regulator with Enable and Power Good
TPS7A1650 60V, 5μA IQ Low-Dropout 100mA Linear Regulator with Enable and Power Good
Learn more by downloading the reference design below
Advertisement
Learn more about Texas Instruments
