AD5700-1BCPZ - HART FSK Modem IC | Analog Devices
N.º de pieza: AD5700-1BCPZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $11.4545 | $11,45 |
| 10 | $8.2727 | $82,73 |
| 100 | $7.3182 | $731,82 |
| 500 | $7 | $3.500,00 |
| 1.000 | $6.6818 | $6.681,80 |
AD5700-1BCPZ Descripción general
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.
Alternativas directas para AD5700-1BCPZ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con AD5700-1BCPZ (mismo factor de forma y huella) — difiere en Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AD5700BCPZ
📋 Alternativa de referencia (no en el catálogo)
HT5700
📋 Alternativa de referencia (no en el catálogo)
HT1200M
📋 Alternativa de referencia (no en el catálogo)
AD5700-1BCPZ Especificaciones
| Product Type | HART FSK Half-Duplex Modem |
| Protocol Compliance | HART Physical Layer Specification |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Typical Supply Current | 1 mA |
| Internal Oscillator | Yes |
| Internal Reference Voltage | 2.5 V |
| Rango de temperatura de funcionamiento | -40°C to +125°C |
| Encapsulado | 24-Lead LFCSP-WQ (4x4 mm) |
| Tipo de montaje | Surface Mount |
| Received Band-Pass Filter | Integrated, bypassable |
| HART Output Drive | Internally buffered, high drive |
| Modulation Technique | FSK (1200 Hz logic 1, 2200 Hz logic 0) |
| Estado RoHS | Compliant |
| Nivel MSL | 3 (168 hours) |
| REACH Status | Unaffected |
Guía de configuración de pines de AD5700-1BCPZ 24-lead lfcsp-wq (4x4 mm)
Configuración de pines para AD5700-1BCPZ (encapsulado 24-lead lfcsp-wq (4x4 mm)). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para AD5700-1BCPZ.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
AD5700-1BCPZ es adecuado para 6 aplicacións: Smart Transmitters, Valve Positioners, PLC Analog Output Modules, Loop-Powered Temperature Transmitters, Industrial Process Control Panels, HART Field Instrument Bridge.
Smart Transmitters
The AD5700-1BCPZ fits smart transmitters that send HART digital data over a 4-20 mA loop while maintaining analog process readings. Its 1 mA typical current draw and 2.7V to 5.5V supply range align with loop-powered budgets, and the internal oscillator removes a crystal from the BOM. In a typical circuit, the modem is coupled to the loop through a small capacitor, with the integrated receive band-pass filter capturing the 1200/2200 Hz FSK tones. This enables simultaneous analog and digital communication with a PLC or DCS, minimizing power consumption and board area.
Recomendado
Valve Positioners
In valve positioners, the AD5700-1BCPZ provides the HART physical-layer modem that communicates setpoint, position, and diagnostic data with the control room. The wide -40°C to +125°C temperature range supports field-mount environments, while the 1 mA typical current keeps total loop current below the 4 mA threshold. The internally buffered HART output can directly drive the coupling network without an additional line driver. Designers can use the integrated 2.5V reference to reduce external components, and the bypassable band-pass filter offers flexibility in matching the analog input stage.
Recomendado
PLC Analog Output Modules
PLC analog output modules that support HART pass-through use the AD5700-1BCPZ to combine a 4-20 mA analog output with digital communication on the same wire pair. The device's low 1 mA current consumption is important when multiple channels are powered from a single backplane rail. Its internal oscillator and reference reduce external component count, which is critical in high-channel-density cards. The HART output buffer simplifies the interface between the modem and the analog output drive stage, while the integrated receive filter helps reject noise in industrial PLC environments.
Recomendado
Loop-Powered Temperature Transmitters
Loop-powered temperature transmitters place a tight constraint on quiescent current because the entire device must operate from the 4-20 mA loop. The AD5700-1BCPZ's 1 mA typical supply current and 2.7V supply capability allow the modem to coexist with a temperature sensor, ADC, and microcontroller within the loop budget. The internal oscillator eliminates a crystal and saves space in cylindrical or compact enclosures. The modem sends HART temperature and diagnostic data without interrupting the analog temperature signal, enabling predictive maintenance from the control room.
Recomendado
Industrial Process Control Panels
Industrial process control panels integrate field transmitters, controllers, and HART multiplexers. The AD5700-1BCPZ enables a local HART modem interface for configuration, calibration, and diagnostics on each 4-20 mA channel. With the internal 2.5V reference and integrated filter, the modem forms a minimal-component HART port that can be connected to a UART on the panel microcontroller. The -40°C to +125°C rating covers cabinet ambient temperature variations, and the small 4x4 mm LFCSP package permits dense channel spacing on the panel I/O card.
Recomendado
HART Field Instrument Bridge
The AD5700-1BCPZ can serve as a HART bridge between a legacy 4-20 mA wiring loop and a digital UART in field instruments, analyzers, or wireless adapters. Its half-duplex FSK operation at 1200/2200 Hz allows reliable data transmission over long cable runs, while the integrated receive band-pass filter improves signal-to-noise ratio in electromagnetically noisy plants. The buffered output drives coupling transformers or capacitors directly, reducing external circuitry. The modem's low power and wide temperature range make it suitable for battery-powered or loop-powered field instruments used in remote monitoring applications.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD5700-1BCPZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AD5700BCPZ | HT5700 | HT1200M |
|---|---|---|---|---|
| Package | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) [pin-compatible] | 24-LFCSP-WQ (4x4 mm) [pin-compatible] |
| Brand | Analog Devices | Analog Devices | Microcybers | Microcybers |
| HART Physical Layer Compliance | Yes | Yes | Yes (HART-certified) | Yes (HART-certified) |
Diferenciadores clave
- Internal oscillator eliminates external 3.6864 MHz crystal (frente a AD5700BCPZ)
- Comprehensive datasheet with documented 2.7V-5.5V and 1mA operation (frente a HT5700)
- Integrated 2.5V reference and bypassable receive band-pass filter (frente a HT1200M)
Notas de diseño
Decouple the AD5700-1BCPZ supply with a 1uF ceramic capacitor as close as possible to the VDD pin, and place a 0.1uF capacitor in parallel for high-frequency noise. The modem draws approximately 1 mA typical, but during HART transmission the current may increase transiently. Ensure the supply can handle this dynamic load without droop, especially in loop-powered designs where the total current budget is limited to about 3.5 mA to 4 mA.
Keep the HART analog signal path away from digital switching traces and microcontroller clock lines. Use a solid ground plane under the LFCSP package and route the HART output and receive input as differential or guarded traces. The integrated receive band-pass filter reduces external filtering requirements, but careful layout is still needed to prevent crosstalk from corrupting the 1200 Hz / 2200 Hz FSK tones. Follow the layout recommendations in the Analog Devices datasheet.
Do not omit the coupling capacitor and protection circuit on the HART signal path. Even though the AD5700-1BCPZ has an internally buffered output, the modem must be protected from loop transients and overvoltage events. Also, when replacing an AD5700BCPZ-based design with the AD5700-1BCPZ, remove the external oscillator and connect the XTAL/CLK pins according to the datasheet for internal oscillator mode. Incorrect oscillator configuration prevents HART communication.
The AD5700-1BCPZ draws only about 1 mA, so self-heating is minimal. However, the 24-lead LFCSP-WQ package has an exposed pad that should be soldered to a PCB ground pour for improved thermal and electrical performance. In industrial enclosures with ambient temperatures up to +125°C, verify that the junction temperature remains below the maximum rating; the low power dissipation makes this straightforward in most designs.
Información de cumplimiento
RoHS3 compliant and REACH unaffected per PartGenie listing for AD5700-1BCPZ-RL7, same silicon die as base AD5700-1BCPZ. MSL Level 3 (168 hours). Not AEC-Q100 qualified.
