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ADI - Model AD74115 -Single-Channel, Software Configurable Input and Output
The AD74115 is a versatile single-channel, software-configurable input and output device tailored for industrial control applications. It features multiple functionalities integrated into one chip, including analog output, analog input, digital output, digital input, resistance temperature detector (RTD), and thermocouple measurement capabilities. Communication is handled via a Serial Peripheral Interface (SPI), with digital inputs and outputs accessible through either SPI or GPIO pins to support higher speed data rates. The device boasts a 16-bit sigma-delta ADC and a 14-bit DAC, with a highly accurate 2.5V on-chip reference that serves both DAC and ADC. When paired with the ADP1034 power management unit, the AD74115 offers programmable power control on the positive analog supply (AVDD), optimizing power solutions for end applications. It also includes an on-chip charge pump for unipolar operations, enhancing its adaptability for various industrial control scenarios. The AD74115 is the go-to solution for engineers looking for integrated, high-precision control systems.
The AD74115 is a single-channel, software-configurable, input and output device for industrial control applications. The AD74115 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. A serial peripheral interface (SPI) is used to handle all communications to the device. 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 AD74115 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 AD74115 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
- 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
- On-chip diagnostics including open-circuit and short-circuit detection
- 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