Features and Benefits
- Single-channel software configurable input and output
- 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
- 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
- Integrated HART modem
- On-chip diagnostics including open-circuit and short-circuit detection
- Internal temperature sensor, ±5°C accuracy
- Wide power supply range
- Programmable power control
- Temperature range: −40°C to +105°C
- 48-lead LFCSP
The AD74115H is a single-channel, software-configurable, input and output device for industrial control applications. The AD74115H 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.
The device features a 16-bit, Σ-Δ analog-to-digital converter (ADC) and a 14-bit digital-to-analog converter (DAC). The AD74115H contains a high accuracy 2.5 V on-chip reference that can be used as the DAC and ADC reference.
Power and isolation can be provided using the ADP1034 companion product. When using the ADP1034 and AD74115H together, programmable power control (PPC) is available on the positive analog supply, AVDD, which allows for an optimized power solution in the end application. An on-chip charge pump can be enabled if unipolar capability is required.
- Isolated industrial control systems
- Process control
- Factory automation
- Building control systems
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The EVAL-AD74115H-ARDZ is a fully featured evaluation board that can be used to evaluate the features of the AD74115H in a full system solution where power and isolation are provided by the ADP1034. The AD74115H is a single-channel, software configurable, input and output device. The device has functionality for analog output, analog input, digital input, digital output, and 2-wire, 3-wire, and 4-wire resistance temperature detector (RTD) measurements integrated into a single-chip solution with a compatible serial peripheral interface (SPI).
The EVAL-AD74115H-ARDZ can be controlled via a system demonstration platform (SDP) board. The EVAL-SDP-CK1Z (SDP-K1) board allows the EVAL-AD74115H-ARDZ to be controlled via the USB port of a PC using the AD74115H evaluation software. The EVAL-AD74115H-ARDZ requires an operating supply of 4.5 V to 60 V. The PC provides power to the SDP-K1 board.
For full details on the AD74115H and ADP1034, see the AD74115H and ADP1034 data sheets, which must be consulted in conjunction with this user guide when using the EVAL-AD74115H-ARDZ.
Documentation & Resources
Software & Systems Requirements
Tools & Simulations
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.