ADP1031ACPZ-3-RL7 - Isolated PMU with 7 Digital Isolators | Analog Devices
MPN: ADP1031ACPZ-3-RL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.75 | $8.75 |
| 10 | $7.92 | $79.20 |
| 100 | $6.85 | $685.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.48 | $5,480.00 |
Drop-in alternatives for ADP1031ACPZ-3-RL7 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADP1031ACPZ-3-R7
β Drop-Inπ Reference alternative (not in catalog)
ADP1031ACPZ-3
β Drop-Inπ Reference alternative (not in catalog)
ADP1031ACPZ-3-RL7 Maximum Ratings & Electrical Characteristics
| Input Voltage Range | 4.5 V to 60 V |
| Number of Isolated Outputs | 3 |
| Flyback Output Voltage | 3.3 V or 5 V |
| Inverting Output Voltage | -5 V |
| Buck Output Voltage | 3.3 V |
| Digital Isolators | 7 (4 SPI + 3 GPIO) |
| Isolation Rating | 5 kV rms |
| Data Rate | 100 Mbps |
| Package | 41-LFCSP (9x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| RoHS Status | Compliant |
| Overvoltage Protection | Yes (on inverting regulator) |
| Soft-Start | Yes |
| Thermal Shutdown | Yes |
ADP1031ACPZ-3-RL7 Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | GND β Ground |
| Pin 3 | VOUT1 β Flyback output |
| Pin 4 | VOUT2 β Inverting output |
| Pin 5 | VOUT3 β Buck output |
| Pin 6 | FB1 β Feedback for flyback |
| Pin 7 | FB2 β Feedback for inverting |
| Pin 8 | FB3 β Feedback for buck |
| Pin 9 | EN β Enable pin |
| Pin 10 | SPI_CLK β SPI clock input |
| Pin 11 | SPI_MOSI β SPI data input |
| Pin 12 | SPI_MISO β SPI data output |
| Pin 13 | SPI_CS β SPI chip select |
| Pin 14 | GPIO1 β General purpose digital isolator |
| Pin 15 | GPIO2 β General purpose digital isolator |
| Pin 16 | GPIO3 β General purpose digital isolator |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADP1031ACPZ-3-RL7 is suitable for 6 applications: Isolated Data Acquisition, Industrial PLC I/O Modules, Isolated Power Supply Monitoring, Motor Control Drives, Isolated SPI Communication, Battery Management Systems.
Isolated Data Acquisition
The ADP1031ACPZ-3-RL7 provides isolated power and SPI isolation for data acquisition systems. Its 5 kV rms isolation and 100 Mbps SPI data rate ensure clean, safe communication between a microcontroller and an isolated ADC. The integrated flyback and buck converters supply the ADC and digital isolator rails, eliminating the need for separate power and isolation components. This reduces board space and improves system reliability in industrial monitoring and control applications.
Recommended
Industrial PLC I/O Modules
In PLC I/O modules, the ADP1031ACPZ-3-RL7 generates isolated power rails for field-side sensors and actuators, while its digital isolators transfer control signals across the isolation barrier. The wide 4.5V to 60V input range accommodates various field supply voltages, and the integrated protection features ensure robust operation in harsh industrial environments. This integration simplifies the design of multi-channel I/O modules and reduces component count.
Recommended
Isolated Power Supply Monitoring
The ADP1031ACPZ-3-RL7 is used in isolated power supply monitoring systems to provide isolated power to monitoring circuits and to isolate communication with a host controller. Its three isolated outputs can power a microcontroller, an ADC, and a communication interface simultaneously. The integrated digital isolators ensure safe data transfer across the isolation barrier, enabling accurate voltage and current monitoring in high-voltage systems.
Recommended
Motor Control Drives
In motor control drives, the ADP1031ACPZ-3-RL7 provides isolated power for gate drivers and feedback circuits, while its digital isolators transmit PWM and fault signals across the isolation barrier. The high isolation rating and wide input voltage range make it suitable for industrial drives operating from 24V to 60V buses. The integrated buck converter can power the control logic, reducing the need for additional power supplies.
Recommended
Isolated SPI Communication
The ADP1031ACPZ-3-RL7 is ideal for isolated SPI communication between a host processor and peripheral devices. Its four high-speed SPI isolators support data rates up to 100 Mbps, enabling fast and reliable data transfer. The integrated power converters provide isolated power to the peripheral side, eliminating the need for separate isolated power supplies. This makes it a compact solution for isolated sensor interfaces and communication links.
Recommended
Battery Management Systems
In battery management systems (BMS), the ADP1031ACPZ-3-RL7 provides isolated power for cell monitoring circuits and isolates communication between the battery pack and the host controller. Its wide input voltage range accommodates varying battery voltages, and the integrated digital isolators ensure safe data transfer in high-voltage environments. The compact LFCSP package is suitable for space-constrained BMS modules.
Recommended
Recommended Products Summary
Engineering reference data for ADP1031ACPZ-3-RL7 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADP1031ACPZ-3-R7 | ADP1031ACPZ-3 | ADuM3470 | ADuM4470 |
|---|---|---|---|---|---|
| Package | 41-LFCSP (9x7) | 41-LFCSP (9x7) | 41-LFCSP (9x7) | 20-SOIC | 20-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V | 3.0V to 5.5V | 3.0V to 5.5V |
| Number of Isolated Outputs | 3 | 3 | 3 | 1 | 1 |
| Digital Isolators | 7 | 7 | 7 | 4 | 4 |
| Isolation Rating | 5 kV rms | 5 kV rms | 5 kV rms | 2.5 kV rms | 2.5 kV rms |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 25 Mbps | 25 Mbps |
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Integrated 7 digital isolators (vs ADuM3470)
- Three isolated outputs (vs ADuM3470)
- Higher isolation rating (vs ADuM3470)
Design Notes
For the ADP1031ACPZ-3-RL7, ensure proper PCB layout with adequate spacing for isolation. The flyback transformer should be placed close to the device to minimize parasitic inductance. Use a solid ground plane under the primary side and a separate ground plane for the secondary side, with a clearance of at least 8 mm for 5 kV isolation. Place decoupling capacitors (0.1 uF and 10 uF) close to the VIN and VOUT pins.
The ADP1031ACPZ-3-RL7 can dissipate significant power at high input voltages and load currents. The 41-LFCSP package has a thermal resistance of approximately 25 C/W (theta_JA). For reliable operation, ensure adequate copper area on the PCB for heat sinking. If the device is expected to dissipate more than 2W, consider adding thermal vias and a larger copper pour on the bottom layer.
A common pitfall is incorrect transformer selection for the flyback converter. The transformer must have the correct turns ratio and isolation rating to achieve the desired output voltage and isolation. Also, ensure the feedback resistors for the inverting regulator are properly set to avoid triggering the OVP circuit, which stops switching if the FB3 voltage falls below VFB3 by 10%. Refer to the datasheet for recommended transformer specifications.
Compliance Information
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
