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AD74115H Datasheet(PDF) 1 Page - Analog Devices |
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AD74115H Datasheet(HTML) 1 Page - Analog Devices |
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1 / 113 page  Data Sheet AD74115H Single-Channel, Software Configurable Input and Output with HART Modem Rev. 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. FEATURES ► 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-∆ 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 de- tection ► 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 FUNCTIONAL BLOCK DIAGRAM Figure 1. Functional Block Diagram GENERAL DESCRIPTION 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 thermo- couple measurement capability. The AD74115H also has an inte- grated 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 compan- ion 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. COMPANION PRODUCTS ► Power and Data Isolation with PPC: ADP1034 ► Voltage Reference: ADR4525 |
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