Modems
Products (3)
AD5700-1BCPZ - HART FSK Modem IC | Analog Devices
The AD5700-1BCPZ is a single-chip HART FSK half-duplex modem from Analog Devices, designed to comply with the HART physical layer requirements. It integrates all necessary filtering, signal detection, modulation, demodulation, and signal generation functions, requiring few external components. The device operates from a 2.7V to 5.5V supply and features an internal oscillator, eliminating the need for an external crystal. It is available in a compact 24-lead LFCSP-WQ (4x4 mm) package, making it ideal for space-constrained industrial applications. A HART modem is a specialized integrated circuit that enables communication over legacy 4-20 mA analog loops by superimposing a digital frequency-shift keying (FSK) signal. The HART protocol uses two frequencies: 1200 Hz for logic '1' and 2200 Hz for logic '0', allowing simultaneous analog and digital communication. The AD5700-1BCPZ is part of the HART modem product family, which falls under the broader category of industrial communication ICs, specifically interface ICs for process automation. Key features of the AD5700-1BCPZ include a low power consumption of 1 mA typical, an integrated receive band-pass filter that can be bypassed, and an internally buffered HART output with high drive capability. The device also includes an internal 2.5V reference and supports a wide operating temperature range of -40°C to +125°C. The LFCSP package provides excellent thermal performance and a small footprint, suitable for high-density designs. Technically, the AD5700-1BCPZ uses a digital signal processing (DSP) architecture to implement the HART modem functions, ensuring accurate and reliable communication. The integrated filter eliminates the need for external components, simplifying the design and reducing bill of materials cost. The device is fully compliant with the HART physical layer specification, ensuring interoperability with other HART-compliant devices. Typical applications include industrial process control, smart transmitters, valve positioners, and other field instruments that require HART communication. The low power consumption and small package make it suitable for loop-powered devices where power budget is critical. The internal oscillator further reduces component count, making it an excellent choice for compact designs. When designing with the AD5700-1BCPZ, ensure proper decoupling of the power supply and careful layout of the analog and digital sections to minimize noise. The device requires a few external components, including a coupling capacitor and a protection circuit for the HART signal path. Refer to the datasheet for detailed application circuits and recommended component values.
AD5700-1BCPZ-R5 - Low Power HART Modem IC | Analog Devices
The AD5700-1BCPZ-R5 is a single-chip HART (Highway Addressable Remote Transducer) FSK half-duplex modem from Analog Devices, designed to comply with the HART physical layer requirements. It integrates all necessary filtering, signal detection, modulation, demodulation, and signal generation functions, requiring minimal external components. The device operates from a 2.7V to 5.5V supply and features an integrated oscillator, eliminating the need for an external crystal. It is available in a compact 24-lead LFCSP-WQ (4x4 mm) package, making it ideal for space-constrained industrial applications. A HART modem is a specialized integrated circuit that enables digital communication over legacy 4-20 mA analog instrumentation loops. It uses Frequency Shift Keying (FSK) to superimpose digital signals on the analog current loop, allowing simultaneous analog and digital communication. The AD5700-1BCPZ-R5 is part of the broader category of industrial communication ICs, which are essential for smart field instruments, process control, and factory automation systems. Key features include a low power consumption of 0.86 mA typical in operating mode, a wide supply voltage range of 2.7V to 5.5V, and an integrated 0.5% accurate oscillator. The device supports HART FSK signaling at 1200 baud and includes a UART interface for easy connection to microcontrollers. It also features a carrier detect output and a modem reset function, simplifying system design. The AD5700-1BCPZ-R5 uses a mixed-signal architecture that combines analog front-end filtering with digital demodulation, ensuring robust performance in noisy industrial environments. The integrated oscillator reduces component count and improves reliability, while the low power consumption makes it suitable for loop-powered devices. The device is specified over the industrial temperature range of -40°C to +125°C. Typical applications include smart transmitters, valve positioners, flow meters, and other HART-enabled field instruments. It is also used in HART multiplexers and gateway modules for process control systems. The device's low power and small footprint make it ideal for loop-powered 4-20 mA transmitters. When designing with the AD5700-1BCPZ-R5, ensure proper decoupling of the power supply and careful layout of the analog front-end to minimize noise. The integrated oscillator eliminates the need for an external crystal, but the supply voltage must be kept within the specified range to maintain oscillator accuracy.
AD5700-1BCPZ-RL - HART Modem IC with Oscillator | Analog Devices
The AD5700-1BCPZ-RL is a single-chip HART FSK half-duplex modem from Analog Devices, designed to comply with the HART physical layer requirements. It integrates all necessary filtering, signal detection, modulation, demodulation, and signal generation functions, requiring few external components. The device operates from a 2.7V to 5.5V supply and features an integrated oscillator, eliminating the need for an external crystal. It is available in a compact 24-lead LFCSP-WQ (4x4 mm) package, suitable for space-constrained industrial applications. A HART modem is a specialized integrated circuit that enables communication over legacy 4-20 mA analog loops by superimposing a frequency-shift keying (FSK) digital signal. The AD5700-1 is part of the HART modem product family, which falls under the broader category of industrial communication ICs. These devices are essential in process automation, allowing digital configuration and diagnostics without disrupting analog measurement signals. Key features include a low-power design with a typical supply current of 86 µA in listen-only mode, an integrated receive band-pass filter that can be bypassed, and an internally buffered HART output for high drive capability. The device also includes an internal reference, a RESET pin for power-down mode, and a REF_EN pin to control the internal reference. The integrated oscillator provides a precise 1.2 MHz clock, simplifying the design and reducing component count. The AD5700-1 uses a digital signal processing (DSP) architecture to implement the HART protocol, ensuring reliable communication over long cable runs. The device supports data rates of 1200 bps, the standard HART speed, and is fully compliant with the HART physical layer specification. The LFCSP package offers excellent thermal performance and a small footprint, making it ideal for loop-powered transmitters and other compact field instruments. Typical applications include industrial process control, smart transmitters, valve positioners, and other field instruments that require HART communication. The device interfaces easily with Analog Devices' industrial converters, such as the AD5421 loop-powered current-output DAC, enabling complete smart transmitter solutions. When designing with the AD5700-1, ensure proper decoupling on the supply pins and follow the recommended layout in the datasheet to minimize noise. The RESET pin can be used to place the device in power-down mode, reducing current consumption to 1 µA, which is critical for loop-powered applications.