AD5700-1BCPZ - HART FSK Modem IC | Analog Devices
MPN: AD5700-1BCPZ ✓ Active| Qty | Unit Price | Extended |
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| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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Drop-in alternatives for AD5700-1BCPZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD5700BCPZ
✅ Drop-In📋 Reference alternative (not in catalog)
HT5700
✅ Drop-In📋 Reference alternative (not in catalog)
HT1200M
✅ Drop-In📋 Reference alternative (not in catalog)
AD5700-1BCPZ Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature Range | -40°C to +125°C |
| Package | 24-Lead LFCSP-WQ (4x4 mm) |
| Mounting Type | 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) |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
| REACH Status | Unaffected |
AD5700-1BCPZ 24-lead lfcsp-wq (4x4 mm) Pin Configuration Guide
Complete pinout information for AD5700-1BCPZ (24-lead lfcsp-wq (4x4 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for AD5700-1BCPZ.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD5700-1BCPZ is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for AD5700-1BCPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | [DATA_NEEDED] | [DATA_NEEDED] |
| Typical Supply Current | 1 mA | 1 mA | [DATA_NEEDED] | [DATA_NEEDED] |
| Internal Oscillator | Yes | No | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | [DATA_NEEDED] | [DATA_NEEDED] |
| HART Physical Layer Compliance | Yes | Yes | Yes (HART-certified) | Yes (HART-certified) |
| Integrated 2.5V Reference | Yes | Yes | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Internal oscillator eliminates external 3.6864 MHz crystal (vs AD5700BCPZ)
- Comprehensive datasheet with documented 2.7V-5.5V and 1mA operation (vs HT5700)
- Integrated 2.5V reference and bypassable receive band-pass filter (vs HT1200M)
Design Notes
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.
Compliance Information
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.
