Part A
ADE7755ARS
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1570 PCS
- Package
- SSOP-24
- Series
- PMIC - Energy Metering
Replacement verdict
Compatible functional replacement candidate
The ADE7755ARSZ is a functionally compatible replacement candidate for the ADE7755ARS, as both devices share the same core energy-metering architecture, pinout, and package footprint. The primary distinction is package construction and lead finish, so validation of assembly and soldering processes is recommended before substitution in production.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
High match
Lead Finish and Assembly
Validation required
Parts at a glance
Part B
ADE7755ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4866 PCS
- Package
- SSOP-24
- Series
- PMIC - Energy Metering
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADE7755ARSZ | ADE7755ARS | Why it matters |
|---|---|---|---|
| Package / Mounting | 20-Lead SSOP (RS-20), Surface Mount | 20-Lead SSOP (RS-20), Surface Mount | Same footprint and mounting, so board layout is interchangeable between the two parts. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free (Z suffix denotes Pb-free) | Non-RoHS, contains lead (no Z suffix) | The Z suffix indicates lead-free/RoHS compliance; this affects regulatory compliance and solder process requirements. |
| Function | Energy metering IC (single-phase, pulse output) | Energy metering IC (single-phase, pulse output) | Both are the same functional device, so electrical behavior in the application is equivalent. |
| Supply Voltage (VDD) | 5 V nominal | 5 V nominal | Identical supply requirements mean the same power rail and decoupling can be reused. |
| Output Interface | Low-frequency pulse output (F1/F2), high-frequency pulse (CF) | Low-frequency pulse output (F1/F2), high-frequency pulse (CF) | Same pulse outputs allow direct substitution in metering designs without firmware changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure the same environmental operating envelope. |
| Measurement Accuracy | On-chip energy measurement with specified accuracy over dynamic range | On-chip energy measurement with specified accuracy over dynamic range | Same accuracy specification means metering performance is preserved when substituting. |
| Ordering / Part Variant | Z-suffix variant (Pb-free/RoHS) | Base variant (leaded) | The only meaningful difference is the RoHS/lead-free variant; choose based on compliance and assembly requirements. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADE7755ARS | ADE7755ARSZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Input Impedance | 390kOhm | 390kOhm |
| Measurement Error | 0.1% | 0.1% |
| Voltage - I / O High | 2.4V | 2.4V |
| Voltage - I / O Low | 0.8V | 0.8V |
| Supply Current | 3mA | 3mA |
| Voltage - Supply | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V |
| Meter Type | Single Phase | Single Phase |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the ADE7755ARSZ and the ADE7755ARS?
The ADE7755ARSZ and ADE7755ARS are functionally identical energy metering ICs from Analog Devices. The primary difference is the suffix "Z," which denotes a lead-free (Pb-free) package that is RoHS-compliant. The ADE7755ARS is the older leaded (non-RoHS) version. Both are supplied in a 20-lead SSOP package and share the same electrical specifications and functional block diagram.
Are the ADE7755ARSZ and ADE7755ARS pin-compatible?
Yes. Both devices use the same 20-lead SSOP (Shrink Small Outline Package) with an identical pinout. The pin functions, including the analog inputs (V1P, V1N, V2P, V2N), the current output (CF), the pulse output (F1, F2), and the serial interface pins, are the same on both versions, allowing them to share the same PCB land pattern.
Can the ADE7755ARSZ be used as a direct drop-in replacement for the ADE7755ARS?
Yes, from a functional and pinout perspective, the ADE7755ARSZ is a drop-in replacement for the ADE7755ARS. The electrical performance, accuracy specifications (such as 0.1% linearity over a 500:1 dynamic range), and internal architecture are the same. The only consideration is that the ADE7755ARSZ is the RoHS-compliant, lead-free variant, which may be required for current production compliance.
What is the function of the ADE7755ARSZ/ADE7755ARS in a metering system?
The ADE7755 is a high-accuracy, pin-selectable power metering IC. It converts the analog signals from a current sensor (such as a shunt or CT) and a voltage divider into a frequency output proportional to the active power. It provides a low-frequency output (F1, F2) for calibration and a high-frequency output (CF) for energy accumulation, making it suitable for single-phase or polyphase energy meters.
What is the operating temperature range for the ADE7755ARSZ and ADE7755ARS?
Both the ADE7755ARSZ and the ADE7755ARS are specified for an industrial operating temperature range of -40°C to +85°C. This is a verified parameter from the Analog Devices datasheet and applies to both the leaded and lead-free package variants.
Do the ADE7755ARSZ and ADE7755ARS require the same external components?
Yes. Because the internal circuitry and pin functions are identical, the external component requirements are the same for both versions. Both require the same external crystal (typically 3.579545 MHz), load capacitors, and the same RC filter networks on the analog inputs and the reference pin (REF/IN). The datasheet application circuits apply equally to both the ADE7755ARSZ and the ADE7755ARS.
Is the ADE7755ARSZ RoHS compliant, and is the ADE7755ARS still available?
The ADE7755ARSZ is the RoHS-compliant, lead-free version and is the recommended part for new designs. The ADE7755ARS (leaded version) is a legacy part; while it may still be found in inventory or on the secondary market, Analog Devices typically recommends the "Z" suffix version for new production to meet current environmental regulations. Always verify current availability and lifecycle status with authorized distributors.