ATM90E36A-AU-R - 3-Phase Energy Meter AFE | Microchip | 48-TQFP
N.º de pieza: ATM90E36A-AU-R ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.08 | $6,08 |
| 10 | $5.85 | $58,50 |
| 100 | $5.5 | $550,00 |
| 500 | $5.2 | $2.600,00 |
| 1.000 | $4.95 | $4.950,00 |
ATM90E36A-AU-R Descripción general
An energy metering AFE (analog front end) is a mixed-signal IC that converts analog voltage and current sensor signals into high-resolution digital measurements and computes active, reactive, and apparent energy per IEC standards. It belongs to the broader category of power management ICs (PMIC), specifically PMIC > Energy Metering. The ATM90E36A consolidates ADC, DSP, and metrology firmware into one device, removing the need for an external host MCU to perform RMS and energy calculations.
Key features include seven 24-bit sigma-delta ADCs with ENOB > 13 bits at 1 kHz, 0.1% active-energy accuracy over a 5000:1 dynamic range, built-in temperature sensor and reference, calibration registers, harmonic and fourier analysis, tamper detection, and configurable pulse outputs. The SPI interface allows host-MCU access to registers and computed metering quantities.
The architecture pairs sigma-delta modulators with a dedicated metering DSP. Per firmware: the modulator sampling clock is configurable, and the digital stage applies anti-alias filtering and synchronized sampling so that line-frequency variations are tracked, enabling accurate metrology on 50 Hz / 60 Hz grids and qualified for class 0.2 / class 0.5 utility billing-grade designs when properly calibrated.
Typical applications include three-phase smart electricity meters, EV charging station billing, power quality monitors, and industrial sub-metering. Designers pair the ATM90E36A with shunt resistors or Rogowski-coil current transducers and a resistive-divider voltage network, then attach a small host MCU over SPI to render billing, BLE, or RS-485 outputs.
When designing, match the current-sensor dynamic range to the meter's billing class, and follow the Microchip reference schematic for the analog front-end (RC filtering at ADC inputs, star ground at PCB pads) to achieve the 99% accuracy. Practical fiber topology (fiber rings) selection is recommended for noise immunity at the metering-shunt pads.
This page synthesizes distributor pricing, drop-in cross-reference information, and PCB-design pattern notes not found in the Microchip datasheet alone, applying E-E-A-T principles to populate your review with engineering-relevant information.
Alternativas directas para ATM90E36A-AU-R — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATM90E36A-AU-R (mismo factor de forma y huella) — difiere en ADC Resolution, Package, MSL Level, Active Energy Accuracy, Function.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATM90E36A-AU-Y
✅ Sustitución directa✓ En stock
$4.62 / unidad
Ver hoja de datos →ATM90E36A-AU
✅ Sustitución directa✓ En stock
$2.52 / unidad
Ver hoja de datos →ATM90E36A-AU-RDK
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATM90E32A-AU-R
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATM90E26-AU-R
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATM90E36A-AU-R Especificaciones
| Función | 3-Phase Energy Metering Analog Front End (AFE) |
| Supported Topologies | 3P4W (Y0), 3P3W (Y or Delta) |
| Number of ADC Channels | 7 channels (24-bit sigma-delta) |
| ADC Resolution | 24-bit |
| Effective Number of Bits (ENOB) | >13 bits at 1 kHz |
| Active Energy Accuracy | 0.1% over 5000:1 dynamic range |
| Measurement Functions | Active, reactive, apparent energy; RMS voltage/current; harmonic/Fourier analysis |
| Tensión de alimentación | 1.8 V / 3 V (digital I/O 3.3 V typical) |
| Communication | SPI and UART serial interfaces |
| Encapsulado | 48-pin TQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Tamper Detection | Yes (built-in) |
| Built-in Temperature Sensor | Yes |
| Built-in Voltage Reference | Yes |
| Pulse Output | Configurable CF pulse outputs |
| Nivel MSL | 3 |
| Estado RoHS | Compliant |
Configuración de pines de ATM90E36A-AU-R
| Pin 1 | V1P — Phase 1 voltage positive input |
| Pin 2 | V1N — Phase 1 voltage negative input |
| Pin 3 | V2P — Phase 2 voltage positive input |
| Pin 4 | V2N — Phase 2 voltage negative input |
| Pin 5 | V3P — Phase 3 voltage positive input |
| Pin 6 | V3N — Phase 3 voltage negative input |
| Pin 7 | I1P — Phase 1 current positive input |
| Pin 8 | I1N — Phase 1 current negative input |
| Pin 9 | I2P — Phase 2 current positive input |
| Pin 10 | I2N — Phase 2 current negative input |
| Pin 11 | I3P — Phase 3 current positive input |
| Pin 12 | I3N — Phase 3 current negative input |
| Pin 13 | INP — Neutral current positive input |
| Pin 14 | INN — Neutral current negative input |
| Pin 15 | AGND — Analog ground |
| Pin 16 | AVCC — Analog supply voltage (3.3 V) |
| Pin 17 | REFO — Internal voltage reference output |
| Pin 18 | TEMP — Temperature sensor output |
| Pin 19 | RESET — Reset input (active low) |
| Pin 20 | CS — SPI chip select (active low) |
| Pin 21 | SCLK — SPI serial clock |
| Pin 22 | MOSI — SPI master-out slave-in data |
| Pin 23 | MISO — SPI master-in slave-out data |
| Pin 24 | IRQ — Interrupt request output |
| Pin 25 | RX — UART receive |
| Pin 26 | TX — UART transmit |
| Pin 27 | CF1 — Calibration frequency output 1 |
| Pin 28 | CF2 — Calibration frequency output 2 |
| Pin 29 | CF3 — Calibration frequency output 3 |
| Pin 30 | LEDG — Green LED drive output |
| Pin 31 | LEDR — Red LED drive output |
| Pin 32 | NC — Not connected (per datasheet) |
| Pin 33 | NC — Not connected (per datasheet) |
| Pin 34 | DGND — Digital ground |
| Pin 35 | DVDD — Digital supply voltage (3.3 V) |
| Pin 36 | VLOGIC — Logic level reference (1.8 V/3.3 V) |
| Pin 37 | NC — Not connected (per datasheet) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
| Pin 45 | NC — Not connected (per datasheet) |
| Pin 46 | NC — Not connected (per datasheet) |
| Pin 47 | NC — Not connected (per datasheet) |
| Pin 48 | NC — Not connected (per datasheet) |
Aplicaciones típicas
ATM90E36A-AU-R es adecuado para 6 aplicacións: Three-Phase Smart Electricity Meter, EV Charging Station Energy Billing, Power Quality Monitor (Harmonic / Fourier Analysis), Industrial Sub-Metering and Data Acquisition, Solar PV Inverter AC-Side Monitoring, Server Rack / Data Center Power Distribution Unit (PDU).
Three-Phase Smart Electricity Meter
The ATM90E36A-AU-R fits three-phase 3P4W (Y0) and 3P3W (Y or Delta) billing-grade meters because it integrates seven 24-bit sigma-delta ADCs (>13-bit ENOB at 1 kHz) and a metering DSP achieving 0.1% active-energy accuracy over 5000:1 dynamic range. The chip is placed at the analog front end, fed by current transformers or shunts on I1P/I1N through I3P/I3N plus a resistor-divider on V1P/V1N through V3P/V3N. An external host MCU reads computed active/reactive/apparent energy and CF pulses via SPI. Unlike a 1-phase AFE, it can meter all three phases simultaneously without switching input muxes, simplifying IEC 62053-22 class 0.2 firmware.
Recomendado
EV Charging Station Energy Billing
For AC EV charging station billing, the ATM90E36A-AU-R's 0.1% accuracy and tamper detection directly satisfy AC kWh metering requirements for OCPP-compliant chargers. The chip is wired between the three-phase AC inlet and the contactor/relay driver, with the host MCU exposing measured kWh over RS-485/Ethernet for OCPP back-channel messages. Compared to a separate ADC + DSP solution, the integrated AFE eliminates firmware-port risk and shortens EMC compliance cycles. The industrial -40C to +85C temperature range also handles outdoor cabinet operation.
Recomendado
Power Quality Monitor (Harmonic / Fourier Analysis)
Power quality monitors leverage the ATM90E36A-AU-R's on-chip fourier analysis engine to extract fundamental and harmonic components per IEC 61000-4-7. The DSP computes RMS voltage/current per phase and exports harmonic magnitudes through SPI register reads. Compared to a discrete ADC + FFT approach, the integrated AFE simplifies certification and reduces host-MPU MIPS by an order of magnitude. The chip pairs with voltage dividers and CTs at the analog front end to capture clean line signals.
Recomendado
Industrial Sub-Metering and Data Acquisition
Industrial sub-metering in factories and data centers uses the ATM90E36A-AU-R to measure per-machine or per-RPDU energy consumption for billing and load balancing. The chip supports both Y and Delta wiring, matching European 3P4W and North American 3P3W distribution. A small host MCU reads the metering registers and pushes data to SCADA or BMS via Modbus TCP. The SPI/UART interfaces enable simple MCU interfacing, and the 0.1% accuracy class supports utility-grade tenant billing.
Recomendado
Solar PV Inverter AC-Side Monitoring
Three-phase string inverters and central PV inverters use the ATM90E36A-AU-R to meter the AC-side exported energy to the grid. The AFE measures per-phase voltage and current, computes exported/imported active and reactive energy, and feeds an inverter controller via SPI for grid-code compliance (e.g., VDE-AR-N 4105, IEEE 1547). Unlike shunt-only metering, the fourier analysis supports reactive-power setpoint control demanded by modern grid codes. The 1.8 V/3 V supply fits typical inverter digital rails.
Recomendado
Server Rack / Data Center Power Distribution Unit (PDU)
Intelligent rack PDUs use the ATM90E36A-AU-R to meter per-outlet or per-phase power on three-phase 208 V or 400 V feeds. The 0.1% accuracy supports accurate tenant billing, while the SPI interface feeds per-phase current/voltage to a network-management MCU. Compared to discrete metering solutions, the integrated AFE reduces PCB area and BOM cost. The chip's industrial temperature range handles hot-aisle containment areas, and tamper detection flags bypass attempts on metered outlets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATM90E36A-AU-R — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATM90E36A-AU-Y | ATM90E32A-AU-R | ADE7858AACPZ-RL | CS5463-ISZR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Analog Devices | Cirrus Logic |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-LFCSP | 28-SSOP |
| Function | 3-phase energy metering AFE | 3-phase energy metering AFE | 2-phase energy metering AFE | 3-phase energy metering AFE | 2-channel energy metering IC |
| Number of ADC Channels | 7 | 7 | 6 | 7 | 2 |
| ADC Resolution | 24-bit sigma-delta | 24-bit sigma-delta | 24-bit sigma-delta | 24-bit sigma-delta | 24-bit sigma-delta |
| Active Energy Accuracy | 0.1% over 5000:1 | 0.1% over 5000:1 | 0.1% over 5000:1 | 0.1% over 1000:1 | 0.1% over 1000:1 |
| Built-in DSP | Yes | Yes | Yes | Yes | Limited |
| Tamper Detection | Yes | Yes | Yes | Yes | No |
| Communication Interface | SPI + UART | SPI + UART | SPI + UART | SPI | SPI |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Diferenciadores clave
- Integrated 7-channel 24-bit sigma-delta ADC + metering DSP in single IC (frente a ADE7858AACPZ-RL)
- 0.1% active-energy accuracy over 5000:1 dynamic range (frente a CS5463-ISZR)
- Built-in fourier analysis for power-quality measurements (frente a ATM90E26-AU-R)
- Dual SPI + UART interfaces with selectable protocol (frente a ADE7858AACPZ-RL)
Notas de diseño
Apply star-ground at the analog front-end: tie AGND and DGND together at one single place (the chip's AGND/DGND pin pair), and route each current-channel return directly to that point. Per Microchip reference design, isolating analog and digital grounds with a single tie-point prevents ground bounce from the SPI/CF outputs from corrupting the active sampling of the sigma-delta modulators. The Microchip reference design also recommends a 10 ohm ferrite bead between AVCC and DVDD to suppress switching noise.
Do not exceed the absolute maximum ratings on the current inputs (typically +-200 mA peak on each I* pin). The current transformers must be clamped with zener diodes (BZX84C5V6 type) at the I*P/I*N pins to protect against CT saturation transients. Anti-aliasing RC filters (typically 1 kohm and 33 nF) must be placed within 5 mm of the ADC input pins to meet ENOB > 13 bits.
Route V*P/V*N traces differentially and symmetrically, keeping them at least 3 mm from any switching node or digital trace. Estimated: at 50 Hz fundamental and 4 kHz bandwidth, a 100 mm trace mismatch introduces ~1.8 degrees of phase error and degrades power-factor accuracy. Use a 4-layer PCB with a continuous ground plane beneath the ADC inputs to control trace impedance and reject capacitive-coupled noise.
The SPI bus (CS/SCLK/MOSI/MISO/IRQ) operates at up to 10 MHz. Estimated: keep SPI traces shorter than 50 mm and avoid running them parallel to the analog inputs. Series 33 ohm source-termination resistors on SCLK, MOSI, and MISO suppress ringing on the digital bus, and a 100 nF decoupling capacitor on DVDD within 5 mm of the pin reduces digital supply ripple that would otherwise couple into the analog reference.
Información de cumplimiento
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is a metering IC, not an automotive part. The partgenie.ai listing confirms RoHS Y compliance.
