MCP3905A-E/SS - 16-Bit Energy Metering IC | Microchip
MPN: MCP3905A-E/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.8757 | $0.88 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MCP3905A-E/SS Overview
An energy-metering ADC is a specialized data-converter IC that converts analog voltage and current signals into digital measurements while providing the accuracy, linearity, and calibration functions required by an electricity meter. The MCP3905A belongs to the ADC/DAC and power-measurement IC hierarchy, combining precision signal acquisition, internal reference generation, and energy-specific outputs in one device.
The MCP3905A incorporates two 16-bit delta-sigma ADCs with programmable gain up to 16, supporting small-shunt measurements across a wide range of input currents. Its integrated voltage reference has ultra-low temperature drift of 15 ppm/°C, helping preserve measurement stability as the meter operates over changing ambient conditions. The device also provides active-real-power pulse output and instantaneous-power-related frequency information according to the manufacturer product description.
Typical applications include residential single-phase electricity meters, utility metering modules, energy-monitoring systems, load-control equipment, and industrial power instrumentation. The device is useful when the design needs accurate voltage and current acquisition without relying solely on a general-purpose microcontroller ADC.
Designers should carefully review the manufacturer datasheet for input ranges, pin functions, electrical limits, calibration procedures, and application-circuit details. External signal conditioning, filtering, current-shunt selection, voltage-divider design, and PCB layout strongly influence achievable meter accuracy. Pricing and availability should be confirmed against authorized distributors for the current purchasing date.
Drop-in alternatives for MCP3905A-E/SS — 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:
MCP3905A-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
MCP3905AT-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
MCP3905A-E/SS Maximum Ratings & Electrical Characteristics
| Product Type | Single-phase energy-metering ADC IC |
| ADC Resolution | 16 bit |
| Number of ADCs | 2 |
| ADC Architecture | Delta-sigma |
| Programmable Gain | Up to 16 |
| Integrated Voltage Reference | 15 ppm/°C ultra-low temperature drift |
| Supported Metering Specification | IEC 62053 |
| Power Output | Frequency proportional to average active real power |
| Package | 24-pin SSOP |
MCP3905A-E/SS 24-pin ssop Pin Configuration Guide
Pin configuration for MCP3905A-E/SS (24-pin ssop package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MCP3905A-E/SS.
Refer to the datasheet for full pin configuration.
Typical Applications
MCP3905A-E/SS is suitable for 6 applications: Residential Single-Phase Electricity Meter, Utility Energy-Metering Module, Energy-Monitoring Appliance, Smart-Grid Load Control, Industrial Power Instrumentation, Portable Energy Monitor.
Residential Single-Phase Electricity Meter
The MCP3905A-E/SS fits a residential single-phase meter because its two 16-bit delta-sigma ADCs can acquire voltage and current channels for energy calculation. The integrated reference has 15 ppm/°C temperature drift, while programmable gain up to 16 supports small-shunt current sensing. The device is housed in a 24-pin SSOP and is intended to support IEC 62053-oriented metering designs. The implementation still needs an appropriate shunt, voltage divider, filtering network, calibration process, and compliant meter safety structure.
Recommended
Utility Energy-Metering Module
In a utility metering module, the MCP3905A-E/SS provides a dedicated measurement front end rather than requiring a general-purpose ADC for both voltage and current. Its two 16-bit delta-sigma conversion channels, gain up to 16, and integrated low-drift reference support repeatable measurements across changing temperatures. The frequency outputs described by Microchip can communicate average active real power and instantaneous power information to the meter controller. Product qualification, calibration, environmental testing, and regional metering certification remain separate design requirements.
Recommended
Energy-Monitoring Appliance
The MCP3905A-E/SS can serve as the analog measurement core in an energy-monitoring appliance that displays consumption or limits loads. The device’s two 16-bit delta-sigma ADCs support simultaneous current and voltage acquisition, while the programmable gain of up to 16 helps adapt to small sensed currents. Its frequency outputs can simplify communication with a measurement controller. The board design must account for input protection, filtering, calibration coefficients, isolation requirements, and the difference between measurement accuracy and regulatory meter approval.
Recommended
Smart-Grid Load Control
For smart-grid load-control equipment, the MCP3905A-E/SS provides a measurement path that can inform switching decisions and energy accounting. Its dedicated energy-metering architecture is more directly aligned with active-power measurement than a generic ADC, and the 15 ppm/°C reference drift supports stable acquisition as ambient conditions change. Firmware must calibrate gain and offset, determine the measurement window, and validate the frequency outputs before controlling relays or power electronics. Safety isolation and load-switch protection are outside the IC’s basic measurement function.
Recommended
Industrial Power Instrumentation
The MCP3905A-E/SS is suitable as a measurement front end in industrial power-instrumentation equipment that monitors single-phase voltage, current, or active energy. The two 16-bit delta-sigma ADCs and gain up to 16 support use with low-amplitude current signals, while the integrated 15 ppm/°C reference reduces temperature-related calibration drift. Designers should select the shunt, voltage divider, analog filters, and protection components for the actual input range. The IC should not be treated as a replacement for fuses, disconnect devices, or other primary power-safety components.
Recommended
Portable Energy Monitor
A portable energy monitor can use the MCP3905A-E/SS when it needs accurate current and voltage conversion in a compact 24-pin SSOP design. The two 16-bit delta-sigma ADCs are suited to low-level analog signals, and the integrated reference reduces the number of external precision references. The 24-pin SSOP package helps keep the analog section compact, but portable products still need defined input ranges, battery or supply compatibility, ESD protection, calibration storage, and a user-facing accuracy specification. Verify the complete electrical limits in the manufacturer datasheet before layout release.
Recommended
Recommended Products Summary
Engineering reference data for MCP3905A-E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCP3905A-I/SS | MCP3905AT-E/SS |
|---|---|---|---|
| Package | 24-pin SSOP | 24-pin SSOP | 24-pin SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Type | Energy-metering ADC IC | Energy Metering IC | Energy-Metering IC |
Key Differentiators
- Dedicated energy-measurement functionality (vs MCP3905A-I/SS)
- Integrated precision reference (vs MCP3905AT-E/SS)
- Measurement-channel configuration (vs MCP3905A-I/SS)
Design Notes
Design the current and voltage front ends before finalizing the meter accuracy budget. Use the MCP3905A-E/SS gain range of up to 16 only after confirming the actual shunt output, divider ratio, tolerance, and worst-case temperature range. Place the analog input components close to the IC and follow the manufacturer’s recommended filtering and grounding arrangement; otherwise ADC resolution does not translate directly into system accuracy.
Keep the current-shunt and voltage-divider paths away from switching nodes and high-current return paths. Route the analog inputs with short, guarded traces, maintain a stable reference and analog ground strategy, and place input filtering near the relevant MCP3905A-E/SS pins. Because the supplied data does not include the complete pinout, verify all 24-pin SSOP connections against the official datasheet before fabrication.
Do not substitute a suffix variant solely because the package name is the same. The supplied data identifies MCP3905A-I/SS and MCP3905AT-E/SS as candidates for review, but it does not prove identical temperature grade, limits, calibration behavior, or lifecycle suitability. Compare the official datasheets, pin functions, absolute maximum ratings, and ordering information before approving a drop-in replacement.
Compliance Information
The verified data identifies IEC 62053 support but does not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than assumed.