2 layers79.5 × 79.5 mm
Esp32-energymeter V2
ElektorLabs/esp32-energymeter
The Elektor ESP32 Energy Meter project, featuring schematics, PCB designs, and ESPHome integration for advanced energy monitoring
116 parts48MIT
Overview
The ATM90E32AS-AU-R is an energy Metering made by Microchip Technology in a TQFP-48(7x7) package with 48 pins. -40℃~+85℃ 0.1% 13mA 16.384MHz 2.8V~3.6V 6 6000:1 6ppm/℃ Polyphase Energy Metering IC SPI TQFP-48(7x7) Energy Metering ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:ATM90E32AS-AU-R, from EasyEDA) and its footprint (Package_QFP:TQFP-48_7x7mm_P0.5mm, from KiCad's library), ready for a KiCad board. 1,272 are in stock at JLCPCB (part C177153). 5 open-source boards in 5 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
10- Supply, least
- 2.8 V · AVDD, recommended operating min · p. 72
- Supply, most
- 3.6 V · AVDD, recommended operating max · p. 72
- Supply, absolute maximum
- 4.5 V · AVDD relative to AGND, absolute max · p. 80
- Works from
- -40 °C · Operating temperature min · p. 1
- Works up to
- 85 °C · Operating temperature max · p. 1
- Junction, hottest
- 150 °C · Junction temperature absolute max · p. 80
- Takes working
- 13 mA · Normal mode typical, 3.3 V, 25 °C · p. 72
- Takes asleep
- 1 µA · Idle mode max · p. 72
- Data rate, most
- 1.1 Mbit/s · SPI slave mode max; 900000 bit/s during current detector calibration · p. 73
- Junction to air (TQFP48)
- 58.5 K/W · Junction to ambient, no airflow · p. 80
What it is and has
10- ADC channels
- 6 dedicated ADCs for phase A/B/C current and voltage · p. 1
- Active and reactive energy accuracy
- ±0.1% active, ±0.2% reactive · p. 1
- Energy dynamic range
- 6000:1 · p. 1
- Temperature sensor accuracy
- ±1 ℃ typical · p. 1
- SPI
- Four-wire interface · p. 1
- Package
- TQFP48 · p. 1
- Clock
- 16.384MHz crystal oscillator; integrated load capacitors · p. 1
- Signal monitoring
- Current and voltage instantaneous signal monitoring · p. 1
- Thresholds
- Programmable startup and no-load power thresholds · p. 1
- Voltage sag and zero crossing
- Programmable voltage sag detection and zero-crossing output · p. 1
Around it
9- cap 0.1 μF
- between Reset and GND; Reset filter capacitor. · p. 8
- res 10kΩ
- between Reset and VDD; Reset pull-up; reset can also connect directly to an MCU output. · p. 8
- cap 0.1μF
- between AVDD and AGND; Analog supply decoupling; connect AVDD to DVDD. · p. 8
- cap 10μF
- between DVDD and DGND; Digital supply decoupling. · p. 8
- cap 0.1μF
- between DVDD and DGND; Digital supply decoupling. · p. 8
- cap 10μF
- between VDD18 and GND; Connect VDD18 pins 42 and 43 together. · p. 8
- cap 4.7μF
- between Vref and AGND; Reference voltage decoupling. · p. 8
- cap 0.1μF
- between Vref and AGND; Recommended additional ceramic decoupling capacitor. · p. 8
- crystal 16.384 MHz
- between OSCI and OSCO; Two on-chip capacitors eliminate the need for external load capacitors. · p. 9
Specifications
38| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Voltage Channel Input Impedance | PGA=1 | typ 120 KΩ | 72 |
| Current Channel Input Impedance | PGA=1 | typ 120 KΩ | 72 |
| Current Channel Input Impedance | PGA=2 | typ 80 KΩ | 72 |
| Current Channel Input Impedance | PGA=4 | typ 50 KΩ | 72 |
| Channel Sampling Frequency | typ 8 kHz | 72 | |
| Channel Sampling Bandwidth | typ 2 kHz | 72 | |
| Temperature Sensor Accuracy | typ 1 °C | 72 | |
| Reference voltage | 3.3 V, 25 °C | typ 1.2 V | 72 |
| Reference voltage temperature coefficient | From -40 to 85 °C; guaranteed by characterization, not production tested | typ 6 · max 15 ppm/°C | 72 |
| Current Detector threshold range | 3.3 V, 25 °C | min 1.5 · max 4 mVrms | 72 |
| Current Detector threshold setting step/ resolution | 3.3 V, 25 °C | typ 0.05 mVrms | 72 |
| Current Detector detection time (single-side) | min 32 ms | 72 | |
| Current Detector detection time (double-side) | min 17 ms | 72 | |
| Oscillator Frequency fsys_clk | The Accuracy of crystal or external clock is ±20 ppm, 10pF ~ 20pF crystal load capacitor integrated. | typ 16.384 MHz | 72 |
| AVDD | min 2.8 · typ 3.3 · max 3.6 V | 72 | |
| DVDD | min 2.8 · typ 3.3 · max 3.6 V | 72 | |
| VDD18 | typ 1.8 V | 72 | |
| Normal mode operating current I-Normal | 3.3 V, 25 °C | typ 13 mA | 72 |
| Idle mode operating current I-Idle | max 1 uA | 72 | |
| Detection mode operating current I-Detection | Double-side detection | typ 200 · max 230 uA | 72 |
| Detection mode operating current I-Detection | Single-side detection | typ 100 · max 115 uA | 72 |
| Partial Measurement mode operating current I-Measurement | 3.3 V, 25°C | typ 7 mA | 72 |
| Slave mode (SPI) bit rate | The maximum SPI bit rate during current detector calibration is 900k bps. | min 400 bps | 73 |
| Charged Device Model (CDM) | JESD22-C101 | typ 500 V | 73 |
| Human Body Model (HBM) | JESD22-A114 | typ 4000 V | 73 |
| Latch Up | JESD78A | max 5.4 V | 73 |
| Digital Input High Level (all digital pins except OSCI) | VDD=3.3V, 5V digital input compatible | min 2 · max 5.5 V | 73 |
| Digital Input Low Level (all digital pins except OSCI) | VDD=3.3V | max 0.8 V | 73 |
| Digital Output Low Level (CF1, CF2, CF3, CF4, ZX0, ZX1, ZX2, SDO) | VDD=3.3V, IOL=8mA | max 0.4 V | 73 |
| Digital Output Low Level (IRQ0, IRQ1, WarnOut) | VDD=3.3V, IOL=5mA | max 0.4 V | 73 |
| Relative Voltage Between AVDD and AGND | min -0.3 · max 4.5 V | 80 | |
| Relative Voltage Between DVDD and DGND | min -0.3 · max 4.5 V | 80 | |
| Analog Input Voltage (I1P, I1N, I2P, I2N, I3P, I3N, V1P, V1N, V2P, V2N, V3P, V3N) | min -0.6 V | 80 | |
| Digital Input Voltage | min -0.3 V | 80 | |
| Digital Input Voltage | for 5V tolerance pins | min -0.3 · max 5.5 V | 80 |
| Operating Temperature Range | min -50 · max 120 °C | 80 | |
| Maximum Junction Temperature | max 150 °C | 80 | |
| Thermal Resistance θJA θJA | TQFP48, No Airflow | typ 58.5 °C/W | 80 |
Pins, by the datasheet
48- 1 AVDD
- Analog power supply; connect to DVDD and decouple with a 0.1uF capacitor. · p. 8
- 2 AGND
- Analog ground. · p. 8
- 3 I1P
- Positive differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 4 I1N
- Negative differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 5 I2P
- Positive differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 6 I2N
- Negative differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 7 I3P
- Positive differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 8 I3N
- Negative differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 9 IC
- Always connect to DGND in system application. · p. 9
- 10 IC
- Always connect to DGND in system application. · p. 9
- 11 Vref
- Reference voltage output; decouple with 4.7uF and preferably an additional 0.1uF ceramic capacitor. · p. 8
- 12 AGND
- Analog ground. · p. 8
- 13 V1P
- Positive differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 14 V1N
- Negative differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 15 V2P
- Positive differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 16 V2N
- Negative differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 17 V3P
- Positive differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 18 V3N
- Negative differential input for an analog ADC channel; channel mapping is configurable. · p. 8
- 19 DGND
- Digital ground. · p. 8
- 20 OSCI
- External crystal input; connect a 16.384 MHz crystal between OSCI and OSCO; load capacitors are integrated. · p. 9
- 21 OSCO
- External crystal output; connect a 16.384 MHz crystal between OSCI and OSCO; load capacitors are integrated. · p. 9
- 22 ZX0
- Voltage or current zero-crossing output, configured by ZXConfig. · p. 9
- 23 ZX1
- Voltage or current zero-crossing output, configured by ZXConfig. · p. 9
- 24 ZX2
- Voltage or current zero-crossing output, configured by ZXConfig. · p. 9
- 25 CF1
- All-phase-sum total active energy pulse output. · p. 9
- 26 CF2
- All-phase-sum total reactive/apparent energy pulse output, selected by CF2varh. · p. 9
- 27 CF3
- All-phase-sum total active fundamental energy pulse output. · p. 9
- 28 CF4
- All-phase-sum total active harmonic energy pulse output. · p. 9
- 29 WarnOut
- Fatal error warning; high for a metering parameter checksum error, otherwise low. · p. 9
- 30 IRQ0
- Interrupt output for EMMIntState0 events; indicates current detector output in Detection mode and clears on entry or exit. · p. 9
- 31 IRQ1
- Interrupt output for EMMIntState1 events; indicates current detector output in Detection mode and clears on entry or exit. · p. 9
- 32 TEST
- Always connect to DGND in system application. · p. 9
- 33 PM0
- Power mode configuration input, used with PM1. · p. 9
- 34 PM1
- Power mode configuration input, used with PM0. · p. 9
- 35 NC
- Leave open. · p. 9
- 36 IC
- Always connect to DGND in system application. · p. 9
- 37 CS
- Active-low chip select; drive high to low for each SPI operation and hold low throughout. · p. 9
- 38 SCLK
- SPI serial clock input. · p. 9
- 39 SDO
- SPI serial data output. · p. 9
- 40 SDI
- SPI serial data input. · p. 9
- 41 Reset
- Active-low reset; connect to ground through 0.1 uF and to VDD through 10kΩ, or drive directly from an MCU output. · p. 8
- 42 VDD18
- 1.8 V digital supply; connect pins 42 and 43 together and to ground through a 10uF capacitor. · p. 8
- 43 VDD18
- 1.8 V digital supply; connect pins 42 and 43 together and to ground through a 10uF capacitor. · p. 8
- 44 DGND
- Digital ground. · p. 8
- 45 NC
- Leave open. · p. 9
- 46 NC
- Leave open. · p. 9
- 47 DGND
- Digital ground. · p. 8
- 48 DVDD
- Digital power supply; decouple with 10uF and 0.1uF capacitors. · p. 8
Parameters
16- Clock Frequency
- 16.384MHz
- Current - Supply
- 13mA
- Data Rate
- 1.1Mbps
- Dynamic Range
- 6000:1
- Features
- Fault detection
- Interface
- SPI
- Junction Temperature(Max)
- 150℃
- Meter Type
- Polyphase Energy Metering IC
- Number of Channels
- 6
- Operating Temperature
- -40℃~+85℃
- Standby Current
- 1uA
- Thermal Resistance(Junction to Ambient)
- 58.5℃/W
- Tolerance
- 0.1%
- Voltage - Supply
- 2.8V~3.6V
- Voltage - Supply(Absolute Max)
- 4.5V
- Voltage Reference Drift
- 6ppm/℃
Order codes
1- ATM90E32AS-AU-RLCSC C177153
Pinout
48| Pin | Name | Type |
|---|---|---|
| 1 | AVDD | Unspecified |
| 2 | AGND | Unspecified |
| 3 | I1P | Unspecified |
| 4 | I1N | Unspecified |
| 5 | I2P | Unspecified |
| 6 | I2N | Unspecified |
| 7 | I3P | Unspecified |
| 8 | I3N | Unspecified |
| 9 | IC | Unspecified |
| 10 | IC | Unspecified |
| 11 | Vref | Unspecified |
| 12 | AGND | Unspecified |
| 13 | V1P | Unspecified |
| 14 | V1N | Unspecified |
| 15 | V2P | Unspecified |
| 16 | V2N | Unspecified |
| 17 | V3P | Unspecified |
| 18 | V3N | Unspecified |
| 19 | DGND | Unspecified |
| 20 | OSCI | Unspecified |
| 21 | OSCO | Unspecified |
| 22 | ZX0 | Unspecified |
| 23 | ZX1 | Unspecified |
| 24 | ZX2 | Unspecified |
| 25 | CF1 | Unspecified |
| 26 | CF2 | Unspecified |
| 27 | CF3 | Unspecified |
| 28 | CF4 | Unspecified |
| 29 | WarnOut | Unspecified |
| 30 | IRQ0 | Unspecified |
| 31 | IRQ1 | Unspecified |
| 32 | TEST | Unspecified |
| 33 | PM0 | Unspecified |
| 34 | PM1 | Unspecified |
| 35 | NC | Unspecified |
| 36 | IC | Unspecified |
| 37 | CS | Unspecified |
| 38 | SCLK | Unspecified |
| 39 | SDO | Unspecified |
| 40 | SDI | Unspecified |
| 41 | RESET# | Unspecified |
| 42 | VDD18 | Unspecified |
| 43 | VDD18 | Unspecified |
| 44 | DGND | Unspecified |
| 45 | NC | Unspecified |
| 46 | NC | Unspecified |
| 47 | DGND | Unspecified |
| 48 | DVDD | Unspecified |
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Is there a KiCad symbol and footprint for the ATM90E32AS-AU-R?
Yes. The symbol is EasyEDA_Cloud:ATM90E32AS-AU-R and the footprint Package_QFP:TQFP-48_7x7mm_P0.5mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the ATM90E32AS-AU-R?
TQFP-48(7x7), with 48 pins. Its footprint is drawn on this page.
Where is the ATM90E32AS-AU-R datasheet?
Microchip Technology publishes it: the Datasheet link on this page opens it.
Where can I order the ATM90E32AS-AU-R?
JLCPCB lists it as part C177153, with 1,272 in stock; the sellers' links on this page open their listings.
What can replace the ATM90E32AS-AU-R?
Parts like it in the library: the ATM90E36A-AU-R by Microchip Technology, the ATM90E32AS-AU-Y by Microchip Technology, the ATM90E36A-AU by Microchip Technology and the ATM90E36A-AU-Y by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the ATM90E32AS-AU-R?
5 boards in 5 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
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