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HomeProductsIntegrated Circuits (ICs)PMIC - Energy MeteringATM90E26-YU-R
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ATM90E26-YU-R - Microchip Technology

Manufacturer Part Number
ATM90E26-YU-R
Manufacturer
Microchip Technology
Allelco Part Number
32D-ATM90E26-YU-R
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
20,068 pcs available, New & Original
Parts Description
IC ENERGY METER 1.8V/3V 28SSOP
Package
28-SSOP
Data sheet
ATM90E26-YU-R.pdf

PCN Design/Specification

Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 20068
  • Unit Price: $1.062
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.062 $1.06
10+ $0.923 $9.23
30+ $0.835 $25.05
100+ $0.692 $69.20
500+ $0.651 $325.50
1000+ $0.634 $634.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ATM90E26-YU-R Tech Specifications
Microchip Technology - ATM90E26-YU-R technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - ATM90E26-YU-R

Product Attribute Attribute Value
Manufacturer Microchip Technology
Voltage - Supply 2.8 V ~ 3.6 V
Voltage - I/O Low -
Voltage - I/O High -
Supplier Device Package 28-SSOP
Series -
Package / Case 28-SSOP (0.209', 5.30mm Width)
Package Tape & Reel (TR)
Product Attribute Attribute Value
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Meter Type Single Phase
Measurement Error 0.5%
Input Impedance 1kOhm, 400kOhm
Current - Supply -
Base Product Number ATM90E26

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

ATM90E26-YU-R Image
ATM90E26-YU-R (1)

Manufacturer Part Number

ATM90E26-YU-R

Manufacturer

Microchip Technology

Introduction

The ATM90E26-YU-R is a single-phase energy metering chip designed for measuring power consumption with high accuracy.

Product Features and Performance

Single-phase energy measurement

High accuracy with 0.5% measurement error

Low input impedance values at 1kOhm and 400kOhm

Designed to operate on a supply voltage between 2.8 V and 3.6 V

Suitable for operating in temperatures ranging from -40°C to 85°C

Product Advantages

Precise energy metering for cost and resource management

Durable over a wide range of environmental conditions

Compact surface mount form factor for space-saving applications

ATM90E26-YU-R Image
ATM90E26-YU-R (2)

Key Technical Parameters

Input Impedance: 1kOhm, 400kOhm

Measurement Error: 0.5%

Voltage Supply: 2.8 V ~ 3.6 V

Operating Temperature: -40°C ~ 85°C

Meter Type: Single Phase

Quality and Safety Features

The device complies with relevant industry standards for safety and quality.

Compatibility

Compatible with various microcontrollers for data processing and communication

Designed for surface mount applications with a 28-SSOP package

Application Areas

Residential and commercial energy metering

Energy management systems

Smart grid infrastructure

Product Lifecycle

The product status is active

No indication of discontinuation, availability of replacements or upgrades should be checked with the manufacturer

Several Key Reasons to Choose This Product

High measurement accuracy for reliable energy billing

Versatile temperature range ensuring operation in diverse environments

Compact size suitable for modern, space-constrained designs

Continual manufacturer support as the product is currently active

Manufactured by Microchip Technology, a leading brand in the semiconductor industry

Frequently Asked Questions(FAQ)

What is the typical measurement accuracy of the ATM90E26-YU-R single-phase energy metering IC, and how does this compare to other Microchip PMICs in its class?
The ATM90E26-YU-R achieves a measurement error of ±0.5%, which represents high precision for residential single-phase energy metering applications. This level of accuracy is competitive with industry-standard metering ICs from Analog Devices and TI, though slightly better than some entry-level models that typically offer ±1% to ±1.5% error margins. When compared to other Microchip metering solutions like the ATM90E32 or ATM90E36, the E26 maintains similar accuracy but with reduced feature complexity, making it ideal for cost-sensitive designs where full-featured multi-tariff or three-phase support isn't required.
Can the ATM90E26-YU-R operate reliably in industrial environments with temperature fluctuations, and what thermal considerations should be made during PCB layout?
Yes, the ATM90E26-YU-R is specified for operation across -40°C to 85°C, meeting industrial temperature requirements common in utility meters and smart appliances. However, sustained operation near 85°C may require derating of internal circuitry, particularly affecting long-term stability of the current sensing reference. For optimal performance, maintain at least 15–20°C margin below maximum junction temperature by ensuring adequate copper pour area on the SSOP-28 package, especially under continuous full-load conditions. Thermal vias beneath the exposed pad (if present) help dissipate heat more effectively.
How does the input impedance configuration of the ATM90E26-YU-R affect voltage and current transformer connections in practical metering applications?
The ATM90E26-YU-R supports configurable input impedances—1 kΩ for direct voltage measurements and 400 kΩ for shunt-based current sensing—which allows flexible interfacing with both voltage transformers (VTs) and Rogowski coils or current transformers (CTs). A 400 kΩ input impedance minimizes loading on CT secondary windings, reducing phase shift and burden errors. In contrast, using the 1 kΩ path would increase current draw from the VT, potentially causing saturation or inaccurate readings if the source cannot supply sufficient drive current.
What are the key differences between the ATM90E26-YU-R and the ATM90E32 when selecting a meter IC for a new design, particularly regarding functionality and pin compatibility?
While both devices share the same base architecture and are available in similar SSOP packages, the ATM90E32 adds advanced features such as tamper detection, multi-tariff energy accumulation, and support for two voltage inputs, making it suitable for complex billing systems. In contrast, the ATM90E26-YU-R is optimized for single-voltage, single-current channel applications without tariff management. Although mechanical footprint differences are minimal, electrical compatibility must be verified: the E32 requires additional GPIOs and has a different I²C address, so existing firmware may need modification when migrating from E26 to E32.
Is the ATM90E26-YU-R suitable for use in solar inverter monitoring systems, and what limitations should be considered?
The ATM90E26-YU-R is primarily designed for grid-tied utility metering rather than renewable energy monitoring, due to its fixed single-phase architecture and lack of built-in anti-islanding or DC injection protection. Solar inverters often generate bidirectional power flow and exhibit harmonic-rich waveforms, which can challenge the E26’s analog front-end if not properly filtered. Additionally, the device does not support active/reactive power separation in dynamic loads common in PV systems. Therefore, while technically possible with external signal conditioning, it's generally recommended to use specialized metering ICs designed for inverter applications instead.
What impact do supply voltage variations have on the performance of the ATM90E26-YU-R, and how should decoupling be implemented?
The ATM90E26-YU-R operates over a supply range of 2.8 V to 3.6 V, typical of battery-powered or low-power metering nodes. Voltage drops below 2.8 V may cause register corruption or incomplete calibration sequences, while excursions above 3.6 V risk damaging the internal LDO or analog blocks. To maintain stable operation, place a 10 µF bulk ceramic capacitor close to the VDD pin and add a 0.1 µF bypass capacitor within 5 mm of the device. Use star grounding techniques to minimize noise coupling into the sensitive analog inputs, especially near the ADC reference paths.
How does the ATM90E26-YU-R handle transient events such as line surges or lightning-induced transients, and what external protection components are recommended?
The ATM90E26-YU-R includes basic ESD protection but lacks integrated surge immunity beyond standard HBM levels. For robust field deployment, external protection is essential: TVS diodes rated for 6 kV contact discharge should be placed at the primary voltage and current input terminals. Gas discharge tubes (GDTs) can be used in conjunction with TVS arrays for higher-energy threats. These should precede any current-limiting resistors or CT/VT interfaces. Failure to implement such protections increases the likelihood of permanent damage during lightning storms or switching transients, especially in outdoor meter installations.
What role does the Moisture Sensitivity Level (MSL) rating of the ATM90E26-YU-R play in manufacturing and storage, and how should it influence production scheduling?
With an MSL rating of 2, the ATM90E26-YU-R requires handling precautions only after solder reflow but before exceeding one year from manufacturing date. If stored in ambient conditions without humidity control, bake-out may be necessary prior to assembly. Manufacturers must track lot dates and ensure that components are used within 12 months of opening the original packaging. This MSL classification aligns with JEDEC J-STD-020 standards, indicating moderate moisture sensitivity compared to Class 3 devices, simplifying inventory management while maintaining reliability.
Can the ATM90E26-YU-R interface directly with microcontrollers via SPI or I²C, and what protocol overhead should designers anticipate?
Yes, the ATM90E26-YU-R communicates exclusively through I²C, supporting standard-mode speeds up to 100 kHz. It uses a fixed 7-bit slave address (typically 0x22 or 0x44 depending on pin configuration), allowing easy integration with most MCUs. Each register access involves two bytes of header plus data, resulting in approximately 30–50 bytes per complete meter reading cycle. Given the device’s modest output rate (~2–4 samples/sec), the I²C overhead is negligible, but clock stretching should be avoided if the host cannot keep up during burst read operations.
How does the cut tape and Digi-Reel packaging format affect procurement logistics for the ATM90E26-YU-R, and what advantages does this provide over traditional tube or tray formats?
Cut tape and Digi-Reel packaging streamline automated pick-and-place assembly by enabling continuous feed through reels compatible with standard pick-and-place machines. This reduces manual handling and improves throughput compared to loose-cut tape or static-dissipative trays, which require additional staging. For small-to-medium volume producers, this format also minimizes lead time and shipping costs since reels are easier to transport and store. However, large-scale manufacturers benefit most from this standardization, ensuring consistent placement accuracy and reducing setup times across production lines.
What calibration procedures are necessary when deploying the ATM90E26-YU-R in custom metering hardware, and how frequently must they be performed?
Initial factory calibration sets gain and offset parameters for voltage and current channels, but field adjustments may be needed due to component tolerances in external CTs or shunts. Designers typically perform zero-point calibration (no-load condition) and full-scale calibration under known load (e.g., 10 A resistive load). Due to temperature drift and aging effects, periodic recalibration every 5–10 years is advisable for long-term accuracy. Some applications implement self-diagnostic routines to detect deviation beyond ±0.3%, triggering user notification or automatic correction via software algorithms.
Does the ATM90E26-YU-R support power factor measurement, and how is this calculated in practice?
Yes, the ATM90E26-YU-R measures instantaneous real power (P), apparent power (S), and calculates power factor as PF = P/S. Real-time PF values are available via registers, updated at each sampling interval. Unlike dedicated PF meters, this implementation assumes linear loads and accurate phase alignment between voltage and current signals. For non-sinusoidal or unbalanced conditions, PF interpretation becomes ambiguous—harmonic distortion can inflate apparent power without affecting real consumption. Thus, PF reporting should be validated against true wattmeter measurements in noisy environments.
How does the ATM90E26-YU-R compare to standalone ADCs with integrated metering firmware in terms of BOM cost and system complexity?
The ATM90E26-YU-R integrates all necessary analog front-end components (PGA, Σ-Δ ADC, reference, calibration logic), eliminating the need for discrete op-amps, filters, and external references. Compared to building a metering solution from scratch using a microcontroller + external ADC, this reduces BOM count by 3–5 components and cuts development time significantly. However, it offers less flexibility in signal chain tuning. For simple projects where only basic RMS measurement suffices, a generic MCU + ADC might suffice, but for certified energy meters requiring traceable accuracy, the E26’s integrated approach justifies its premium over discrete alternatives.
Are there any known limitations in using the ATM90E26-YU-R for high-frequency switching load characterization, such as LED drivers or SMPS?
No, the ATM90E26-YU-R is optimized for fundamental frequency (50/60 Hz) energy measurement and may misrepresent true consumption when applied to high-switching-frequency loads. Fast PWM currents produce harmonic content that the E26’s low-pass filtering cannot fully reject, leading to underestimation of total energy. Moreover, the device lacks spectral analysis capabilities; it only computes average real power over a line cycle. For accurate characterization of modern electronic loads, consider devices with programmable digital filters or those compliant with IEC 62053-21 Class 1 standards explicitly designed for non-linear loads.
What compliance certifications does the ATM90E26-YU-R meet, and how do these influence global market adoption?
The ATM90E26-YU-R is RoHS3 compliant, ensuring restriction of hazardous substances per EU directives, and carries REACH status indicating no SVHCs above threshold concentrations. Its ECCN code (EAR99) simplifies export controls, and HTSUS classification (8542.39.0001) facilitates customs clearance in North America. While it meets basic regulatory requirements, individual end-products still require full system-level certification (e.g., CE, FCC, UL) for sale in target regions. These attributes support broad deployment but do not substitute for complete product safety validation.

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology ATM90E26-YU-R

Product Attribute ATM90E25-YU-R ATM90E32AS-AU-R ATM90E25-YU-B ATM90E36A-AU-R
Part Number ATM90E25-YU-R ATM90E32AS-AU-R ATM90E25-YU-B ATM90E36A-AU-R
Manufacturer Microchip Technology Microchip Technology Microchip Technology Microchip Technology
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Current - Supply - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Input Impedance - - - -
Voltage - I/O High - - - -
Meter Type - - - -
Voltage - I/O Low - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Series - - - -
Voltage - Supply - - - -
Measurement Error - - - -

ATM90E26-YU-R Datasheet PDF

Download ATM90E26-YU-R pdf datasheets and Microchip Technology documentation for ATM90E26-YU-R - Microchip Technology.

Datasheets
Cylindrical Battery Holders.pdf
PCN Design/Specification
Cylindrical Battery Holders.pdf
PCN Packaging
MBB/Label Chgs 16/Nov/2018.pdf Transfer to Microchip/Label/Pkg 5/Sep/2016.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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ATM90E26-YU-R Image

ATM90E26-YU-R

Microchip Technology
32D-ATM90E26-YU-R

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