AD5700-1BCPZ-RL7 - Low Power HART Modem | Analog Devices
MPN: AD5700-1BCPZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
AD5700-1BCPZ-RL7 Overview
A HART modem is a communication IC that superimposes digital Frequency Shift Keying (FSK) signals onto a 4-20 mA analog current loop, using 1200 Hz and 2200 Hz sinusoidal tones to represent logic '1' and logic '0'. In the hierarchy of industrial communication, a HART modem performs physical-layer modulation and demodulation, enabling bi-directional digital communication between a field transmitter and a host system without disrupting the analog loop. The AD5700-1BCPZ-RL7 integrates all necessary filtering, signal detection, modulating, demodulating, and signal generation functions, requiring only a few external components.
Key features include compliance with the HART physical layer, integrated precision oscillator, 115 µA maximum receive supply current, and wide 1.71 V to 5.5 V operating range. The device supports half-duplex FSK with sinusoidal shift frequencies of 1200 Hz and 2200 Hz, and offers a small LFCSP footprint suitable for space-constrained transmitters. According to Analog Devices product documentation, the AD5700/AD5700-1 family is optimized for intrinsically safe applications and industrial communication links.
The modem architecture uses an integrated band-pass filter and demodulator to extract digital data from the loop, while the modulator generates the shaped sinusoidal output that meets HART spectral masks. The precision internal oscillator in the AD5700-1 provides accurate timing without external components, improving reliability and reducing BOM cost. The device is RoHS3 compliant, REACH unaffected, and rated MSL 3 (168 hours), indicating robust environmental compliance.
Typical applications include smart pressure and temperature transmitters, HART multiplexers, valve positioners, and remote I/O modules used in process automation. The device pairs well with precision DACs for analog output stages and ADCs for sensor measurement in field instruments.
When designing with the AD5700-1BCPZ-RL7, ensure proper decoupling on the supply pins and keep the HART output traces away from digital noise sources. Since the AD5700-1 includes an internal oscillator, no external crystal is required, but the PCB layout must respect the physical-layer output filtering recommendations for reliable certification.
Drop-in alternatives for AD5700-1BCPZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD5700-1BCPZ-RL7 (same form factor and footprint) — differing in Package, RoHS Status, Integrated Oscillator, Modulation Type, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD5700-1BCPZ-R5
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View Datasheet →AD5700-1ACPZ-RL7
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AD5700BCPZ-R5
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AD5700-1ACPZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →DS8500-JND+T&R
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HT5700
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AD5700-1BCPZ-RL7 Specifications
| Data Format | HART FSK |
| Supply Voltage Range | 1.71 V to 5.5 V |
| Maximum Receive Supply Current | 115 µA |
| Modulation Type | FSK Half-Duplex |
| Shift Frequencies | 1200 Hz and 2200 Hz |
| Internal Oscillator | Yes (precision) |
| Package | 24-LFCSP-WQ (4x4) |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS3 Compliant |
| REACH Status | Unaffected |
| MSL Level | 3 (168 hours) |
| Family Name | AD5700-1 |
| Category | Integrated Circuits |
| Lifecycle Status | Active |
AD5700-1BCPZ-RL7 Pin Configuration
| Pin 1 | VDD — Power supply input |
| Pin 2 | GND — Ground |
| Pin 3 | TXD — Transmit data input |
| Pin 4 | RXD — Receive data output |
| Pin 5 | CLK — Clock output (internal oscillator) |
| Pin 6 | MOD_OUT — Modulator output |
| Pin 7 | DEMOD_IN — Demodulator input |
| Pin 8 | TEST — Test pin (connect to GND) |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
| Pin 17 | NC — No connect |
| Pin 18 | NC — No connect |
| Pin 19 | NC — No connect |
| Pin 20 | NC — No connect |
| Pin 21 | NC — No connect |
| Pin 22 | NC — No connect |
| Pin 23 | NC — No connect |
| Pin 24 | EP — Exposed pad (connect to GND) |
Typical Applications
AD5700-1BCPZ-RL7 is suitable for 6 applications: Smart Pressure Transmitters, Temperature Transmitters, Valve Positioners, HART Multiplexers, Remote I/O Modules, Process Automation Systems.
Smart Pressure Transmitters
The AD5700-1BCPZ-RL7 is ideal for smart pressure transmitters in process automation. Its low power consumption (115 µA max in receive mode) allows loop-powered operation within the 4-20 mA loop budget. The integrated precision oscillator eliminates the need for an external crystal, reducing BOM cost and board space. The HART FSK modem enables digital communication over the same two wires used for analog current, allowing configuration and diagnostics without disrupting the analog signal. The small 24-LFCSP package fits compact transmitter housings, and the wide supply range (1.71 V to 5.5 V) accommodates various power architectures.
Recommended
Temperature Transmitters
In temperature transmitters, the AD5700-1BCPZ-RL7 provides reliable HART communication for remote monitoring and configuration. Its low supply current is crucial for loop-powered designs where total current consumption must stay below 4 mA. The integrated oscillator ensures accurate FSK timing without external components, simplifying design and improving reliability. The modem's compliance with HART physical layer ensures interoperability with existing HART masters and handheld communicators. The compact package allows integration into small sensor heads, and the wide operating voltage range supports both 3.3 V and 5 V logic interfaces.
Recommended
Valve Positioners
The AD5700-1BCPZ-RL7 enables digital communication in valve positioners, allowing precise control and diagnostics over the 4-20 mA loop. Its low power consumption is essential for positioners that operate on limited power budgets. The integrated oscillator reduces external component count, enhancing reliability in harsh industrial environments. The HART modem supports half-duplex FSK communication, enabling bidirectional data transfer for position feedback and configuration. The small package fits compact positioner housings, and the wide supply range accommodates various power supply designs.
Recommended
HART Multiplexers
In HART multiplexers, the AD5700-1BCPZ-RL7 provides a low-power, compact solution for connecting multiple HART field devices to a single host. Its low receive current (115 µA max) allows many modems to be powered from a single supply without excessive power dissipation. The integrated oscillator simplifies design and reduces component count, which is beneficial in multi-channel systems. The modem's compliance with HART physical layer ensures reliable communication with field devices. The small package enables high-density board layouts, and the wide supply range supports various logic levels.
Recommended
Remote I/O Modules
The AD5700-1BCPZ-RL7 is well-suited for remote I/O modules in industrial automation, where it provides HART communication for field devices. Its low power consumption is critical for modules powered over long cable runs. The integrated oscillator reduces external components, improving reliability and reducing assembly cost. The modem's small package allows compact module designs, and the wide supply range supports both 3.3 V and 5 V systems. The HART FSK modem enables digital communication over existing analog wiring, simplifying installation and maintenance.
Recommended
Process Automation Systems
In process automation systems, the AD5700-1BCPZ-RL7 provides a reliable HART modem for communication with field instruments. Its low power consumption and small package make it ideal for distributed control systems and smart field devices. The integrated oscillator ensures accurate FSK modulation without external components, simplifying design and reducing BOM cost. The modem's compliance with HART physical layer ensures interoperability with existing infrastructure. The wide supply range (1.71 V to 5.5 V) allows flexible power design, and the RoHS3 compliance meets environmental standards.
Recommended
Recommended Products Summary
Engineering reference data for AD5700-1BCPZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD5700-1BCPZ-R5 | AD5700-1ACPZ-RL7 | AD5700BCPZ-R5 | DS8500-JND+T&R |
|---|---|---|---|---|---|
| Package | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated |
| HART Compliance | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated precision oscillator (vs AD5700BCPZ-R5)
- Low power consumption (vs DS8500-JND+T&R)
- Wide supply voltage range (vs AD5700-1ACPZ-RL7)
Design Notes
Ensure proper decoupling on the VDD pin with a 0.1 µF ceramic capacitor placed as close as possible to the pin. A 10 µF bulk capacitor may be needed if the supply is noisy. The AD5700-1BCPZ-RL7 operates from 1.71 V to 5.5 V, so verify the supply voltage does not exceed the absolute maximum rating.
Keep the HART output traces (MOD_OUT and DEMOD_IN) away from digital noise sources such as microcontrollers and switching regulators. Use a ground plane to minimize noise coupling. Follow the layout recommendations in the AD5700-1 datasheet for the external filtering components to ensure HART physical layer compliance.
Do not omit the external filtering components required for HART compliance. The AD5700-1 integrates the modem but still requires a few external components for signal conditioning. Also, ensure the TEST pin is connected to GND for normal operation. Since the AD5700-1 has an internal oscillator, no external crystal is needed, but verify the clock output is not loaded excessively.
Compliance Information
RoHS3 compliant and REACH unaffected per PartGenie. MSL 3 (168 hours). Not AEC-Q100 qualified.
