The AD74115H is a single-channel, software-configurable, input and output device for industrial control applications. It provides a wide range of use cases, integrated on a single chip. These use cases include analog output, analog input, digital output, digital input, resistance temperature detector (RTD) and thermocouple measurement capability.
The AD74115H also has an integrated HART modem. A serial peripheral interface (SPI) is used to handle all communications to the device, including communications with the HART modem. The digital input and digital outputs can be accessed via the SPI or the general-purpose input and output (GPIO) pins to support higher-speed data rates.
Key Features and Benefits
- Multiple configurable modes to a single pin
- Voltage input
- Current input
- Voltage output
- Current output
- Digital input
- Digital output
- 2-wire, 3-wire, or 4-wire RTD measurements
- Thermocouple measurement
- Integrated HART modem on AD74115H
- On-chip diagnostics including open-circuit and short-circuit detection
- Single-channel software-configurable input and output
- Overvoltage tolerant on screw terminal facing pins, powered or unpowered
- Auxiliary high-voltage sense pins
- 10 ppm/°C reference temperature coefficient
- 16-bit, Σ-Δ ADC with optional 50 Hz and 60 Hz rejection
- 14-bit monotonic DAC
- Unipolar and bipolar capability
- Internal temperature sensor, ±5°C accuracy
- SPI-compatible
- Wide power supply range
- Programmable power control
- Temperature range: −40°C to +105°C
- 48-lead LFCSP
Applications
- Isolated industrial control systems
- Process control
- Factory automation
- Building control systems
Evaluation Board
The AD74115H/AD74115 can be evaluated with the EVAL-AD74115H.
Block Diagrams and Tables
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