ATM90E36A-AU - 3-Phase Energy Metering AFE, 48-TQFP | Microchip
N.º de pieza: ATM90E36A-AU ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.99 | $3,99 |
| 10 | $3.59 | $35,90 |
| 100 | $3.19 | $319,00 |
| 500 | $2.84 | $1.420,00 |
| 1.000 | $2.52 | $2.520,00 |
ATM90E36A-AU Descripción general
An energy metering AFE (analog front-end) is a mixed-signal IC that combines sigma-delta ADCs, anti-aliasing filters, a DSP-based measurement engine, and digital calibration blocks. AFEs sit between current transformers / shunt resistors / voltage dividers and a host microcontroller, converting the analog line signals into computed energy quantities, RMS values, THD, and phase angles. Within the broader hierarchy, an energy metering AFE belongs to power management ICs and is typically classified as a data acquisition / signal chain IC in industrial metering subsystems.
Key features include a built-in digital signal processor (DSP) for on-chip computation of mean active/reactive/apparent power, RMS voltage and current, power factor, line frequency, and harmonic distortion (THD) up to the 21st order. The IC exposes three configurable CF (calibration frequency) pulse outputs for active/reactive/apparent energy, plus three zero-crossing detection pins (ZX0/ZX1/ZX2) and three interrupt/warning outputs (IRQ0, IRQ1, WarnOut). Communication to the host MCU is via an SPI/UART selectable serial interface at up to 4 Mbps.
Architecturally, the ATM90E36A-AU uses simultaneous sampling 16-bit second-order sigma-delta ADCs per channel with integrated digital integrators, eliminating the need for an external analog anti-aliasing filter on each current channel. On-chip temperature compensation and per-phase gain/phase calibration registers allow meter class 0.5S / 1.0 accuracy. The -AU suffix indicates the industrial temperature grade (-40C to +85C).
Typical applications include three-phase smart electricity meters, sub-metering in solar PV and energy storage inverters, EV charging station billing, data acquisition terminals, power quality monitors, and industrial three-phase motor energy dashboards. The wide 1000:1 dynamic range also supports both CT-based and Rogowski-coil current sensors. The TQFP-48 footprint suits both through-hole-friendly reflow designs and retrofit metering modules.
When designing with this part, pay attention to the SPI/UART mode selection pin and ensure the host MCU firmware matches the configured baud rate or clock polarity; mismatch is the most common bring-up issue. Decouple AVDD/DVDD with low-ESR 10uF plus 100nF ceramic pairs and provide a clean analog ground island to achieve the rated accuracy at low currents.
This page synthesizes distributor pricing, drop-in package alternatives, and practical calibration notes not found in the bare manufacturer datasheet, with cross-references verified against the M90E36A datasheet revision and Microchip product family page.
Alternativas directas para ATM90E36A-AU — 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 (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-R
✅ Sustitución directa✓ En stock
$4.95 / unidad
Ver hoja de datos →ATM90E36A-AU-Y
✅ Sustitución directa✓ En stock
$4.62 / unidad
Ver hoja de datos →ATM90E36
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATM90E36A
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATM90E32-AU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATM90E36A-AU Especificaciones
| Product Type | 3-Phase Energy Metering AFE IC |
| Metering Topology | 3P4W (Y0), 3P3W (Y or Δ) |
| Input Channels | 7 (3 voltage + 4 current) |
| ADC Resolution | 16-bit sigma-delta |
| Active Energy Accuracy | 0.1% over 1000:1 dynamic range |
| Dynamic Range | 1000:1 |
| Analog Supply Voltage | 3.3 V (typical) |
| Digital I/O Supply | 3.3 V (1.8 V logic-compatible I/O per datasheet) |
| Output Energy Registers | Active, Reactive, Apparent, Fundamental |
| CF Pulse Outputs | 3 (configurable for active/reactive/apparent) |
| Zero-Crossing Outputs | ZX0, ZX1, ZX2 |
| Interrupt Outputs | IRQ0, IRQ1, WarnOut |
| Serial Interface | SPI / UART (mode-selectable), up to 4 Mbps |
| Harmonic Analysis | Up to 21st order THD per phase |
| Temperature Compensation | On-chip |
| Rango de temperatura de funcionamiento | -40C to +85C (Industrial, -AU suffix) |
| Encapsulado | 48-pin TQFP, 7x7 mm body |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 3 (per JEDEC J-STD-020) |
| Estado RoHS | Compliant |
Configuración de pines de ATM90E36A-AU
| Pin 1 | AVDD — Analog 3.3 V supply |
| Pin 2 | AGND — Analog ground |
| Pin 3 | DGND — Digital ground |
| Pin 4 | IAP — Phase A current positive input |
| Pin 5 | IAN — Phase A current negative input |
| Pin 6 | IBP — Phase B current positive input |
| Pin 7 | IBN — Phase B current negative input |
| Pin 8 | ICP — Phase C current positive input |
| Pin 9 | ICN — Phase C current negative input |
| Pin 10 | INP — Neutral current positive input |
| Pin 11 | V1P — Phase 1 voltage positive input |
| Pin 12 | V1N — Phase 1 voltage negative input |
| Pin 13 | V2P — Phase 2 voltage positive input |
| Pin 14 | V2N — Phase 2 voltage negative input |
| Pin 15 | V3P — Phase 3 voltage positive input |
| Pin 16 | V3N — Phase 3 voltage negative input |
| Pin 17 | REFin — External reference input |
| Pin 18 | CF1 — Calibration frequency output 1 (active energy) |
| Pin 19 | CF2 — Calibration frequency output 2 (reactive energy) |
| Pin 20 | CF3 — Calibration frequency output 3 (apparent energy) |
| Pin 21 | ZX0 — Zero-crossing output 0 |
| Pin 22 | ZX1 — Zero-crossing output 1 |
| Pin 23 | ZX2 — Zero-crossing output 2 |
| Pin 24 | IRQ0 — Interrupt output 0 |
| Pin 25 | IRQ1 — Interrupt output 1 |
| Pin 26 | WarnOut — Warning / fault output |
| Pin 27 | RXD — UART RX (host -> AFE) |
| Pin 28 | TXD — UART TX (AFE -> host) |
| Pin 29 | SCLK — SPI clock input |
| Pin 30 | MOSI — SPI master-out slave-in (data to AFE) |
| Pin 31 | MISO — SPI master-in slave-out (data from AFE) |
| Pin 32 | CS — SPI chip-select (active low) |
| Pin 33 | RST — Reset input (active low) |
| Pin 34 | IFSEL — Interface select (SPI / UART mode) |
| Pin 35 | DVDD — Digital 3.3 V (1.8 V logic IO) supply |
| Pin 36 | DGND — Digital ground |
| Pin 37 | TEST — Factory test pin (float in application) |
| 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 | AGND — Analog ground |
| Pin 44 | AVDD — Analog 3.3 V supply |
| Pin 45 | AVDD — Analog 3.3 V supply |
| Pin 46 | AGND — Analog ground |
| Pin 47 | DGND — Digital ground |
| Pin 48 | DVDD — Digital 3.3 V supply |
Aplicaciones típicas
ATM90E36A-AU es adecuado para 7 aplicacións: Three-Phase Smart Electricity Meters, Solar PV / Energy Storage Inverter Sub-Metering, EV Charging Station Energy Billing, Industrial Power Monitoring Terminals, Data Center Power Distribution Units (PDUs), Smart Building Sub-Metering and HVAC Monitoring, Renewable Microgrid Power Quality Recorder.
Three-Phase Smart Electricity Meters
The ATM90E36A-AU is purpose-built for 3P4W and 3P3W residential and commercial smart meters, where its 0.1% active-energy accuracy and 1000:1 dynamic range directly enable IEC 62053-22 class 0.5S billing-grade compliance. Placed between the CT or shunt current sensors and the host MCU, it computes per-phase active, reactive, and apparent energy plus RMS and power factor on-chip, freeing the host MCU from real-time DSP work. The 48-TQFP footprint allows both retrofit upgrades of legacy electromechanical meters and new compact solid-state designs.
Recomendado
Solar PV / Energy Storage Inverter Sub-Metering
In three-phase solar inverters and battery storage cabinets, the ATM90E36A-AU provides bidirectional energy measurement needed for export-limiting and grid-tie billing. Its seven ADC channels simultaneously monitor three-phase grid voltage and current plus a fourth current channel for the DC-link or neutral. With on-chip 21st-order harmonic analysis, the AFE also reports THD required by grid codes like IEEE 1547 and VDE-AR-N 4105 for inverter interconnection compliance.
Recomendado
EV Charging Station Energy Billing
EV AC chargers and DC fast-charging stations need certified billing-grade energy measurement, which the ATM90E36A-AU delivers directly in three-phase 22 kW AC pedestal designs. Its tamper-detection features (per-phase sag/swell detection and zero-crossing monitoring) help detect unauthorized load manipulation. The SPI/UART host interface allows a Linux or RTOS host to expose OCPP 1.6/2.0.1 transaction records using the AFE-computed kWh values without additional metrology firmware.
Recomendado
Industrial Power Monitoring Terminals
In factory-floor three-phase power-quality monitors, the ATM90E36A-AU computes per-phase THD, fundamental-only energy, and RMS values needed by ISO 50001 energy-management reporting. Its 1000:1 dynamic range handles both light-load standby measurement and full-load motor inrush sampling within the same hardware. On-chip temperature compensation maintains accuracy across the industrial -40C to +85C operating range typical of motor-control centers.
Recomendado
Data Center Power Distribution Units (PDUs)
Three-phase rack PDUs in hyperscale and edge data centers use the ATM90E36A-AU to meter per-phase or per-feed load with billing-grade accuracy, enabling per-customer billing and load balancing. The seven-channel input simultaneously monitors three-phase voltage plus four current paths (main + neutral or two three-phase sub-feeds). The 48-TQFP industrial temperature grade supports hot-aisle deployments up to +85C without derating.
Recomendado
Smart Building Sub-Metering and HVAC Monitoring
Building-automation sub-meters and HVAC energy dashboards use the ATM90E36A-AU to allocate three-phase chiller, AHU, and elevator consumption to individual tenants. The on-chip zero-crossing detection (ZX0/ZX1/ZX2) provides phase-angle reference for var compensation, and the 1000:1 dynamic range covers both nighttime idle load and peak-day compressor surge without range switching. The SPI host interface connects directly to BACnet/Modbus gateways over RS-485.
Recomendado
Renewable Microgrid Power Quality Recorder
Microgrid controllers and renewable power-quality recorders use the ATM90E36A-AU for harmonic analysis up to the 21st order required by IEC 61000-4-30 compliance reporting. Three independent zero-crossing outputs allow synchronization with three-phase dispatch decisions, while the three CF pulse outputs can directly drive electromechanical counters in parallel with the digital interface. Industrial -40C to +85C operation supports outdoor cabinet microgrid installations.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATM90E36A-AU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATM90E36A-AU-R | ATM90E36A-AU-Y | ATM90E36 | ATM90E36A | ATM90E32-AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Phases Supported | 3 (3P4W, 3P3W) | 3 (3P4W, 3P3W) | 3 (3P4W, 3P3W) | 3 (3P4W, 3P3W) | 3 (3P4W, 3P3W) | 1-2 phases |
| ADC Channels | 7 (3V + 4I) | 7 | 7 | 7 | 7 | 4 (2V + 2I) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C | 0C to +70C | -40C to +85C |
| Accuracy / Dynamic Range | 0.1% / 1000:1 | 0.1% / 1000:1 | 0.1% / 1000:1 | 0.1% / 1000:1 | 0.1% / 1000:1 | 0.1% / 1000:1 |
| Serial Interface | SPI / UART (selectable) | SPI / UART | SPI / UART | SPI / UART | SPI / UART | SPI / UART |
| Harmonic Order | Up to 21st | Up to 21st | Up to 21st | Up to 21st | Up to 21st | Up to 21st |
| Packing Format | Tray (-AU) | Tape & Reel | Tray | Tray | Tray | Tray |
Diferenciadores clave
- Industrial -40C to +85C temperature grade vs commercial-grade sibling (frente a ATM90E36A (commercial 0C to +70C))
- Three-phase full 7-channel metering vs single/dual-phase 4-channel (frente a ATM90E32-AU)
- Same 48-TQFP package as commercial and reel variants for PCB reuse (frente a Cirrus Logic CS5463 (28-SSOP) and Maxim MAX78615 (different package))
Notas de diseño
Decouple AVDD and DVDD with separate low-ESR 10uF bulk plus 100nF ceramic pairs, and tie AGND and DGND to a single star point under the IC. Place the 100nF caps within 2 mm of the supply pins to suppress the sigma-delta ADC switching noise that otherwise couples into the current-channel PGA. Estimated: based on standard mixed-signal AFE decoupling guidelines; consult the M90E36A application note Atmel-46104A for the exact reference layout.
Confirm the IFSEL pin state at reset - it selects SPI vs UART host interface and cannot be changed dynamically without a hardware reset. Many bring-up failures trace to the IFSEL pull-up/down being left floating, causing intermittent host communication. The RST pin must be held low for at least 100 us after both supplies are stable to ensure proper register initialization.
Route the differential current inputs (IAP/IAN, IBP/IBN, ICP/ICN) as matched-length pairs with a ground shield on each side to preserve the 0.1% accuracy over 1000:1 dynamic range. Keep digital SPI traces (SCLK, MOSI, MISO, CS) at least 5 mm away from the analog current inputs to avoid capacitive coupling of digital edges into the CT/shunt signal path. The 48-TQFP exposed-pad variant (if used) must be soldered to a continuous ground pour for thermal and noise performance.
When interfacing to high-side current transformers, add 10 kohm bias resistors on each current input pin to set the common-mode voltage within the PGA input range; this prevents saturation during large inrush events such as motor startup. For shunt-resistor current sensing, choose a low-inductance SMD shunt (e.g., Stackpole CSS-series) and keep the trace loop below 5 mm square to minimize di/dt-induced errors.
Información de cumplimiento
RoHS compliant per Microchip product page material declaration. -AU suffix denotes industrial temperature grade (-40C to +85C) and is NOT AEC-Q100 qualified - the part is designed for industrial/commercial metering, not automotive. Halogen-free status not explicitly listed in the verified web data.
