MCP39F501 Power Monitoring IC
The MCP39F501 is a highly integrated, single-phase power-monitoring Integrated Circuit (IC) designed for real-time measurement of input power for Alternate Current (AC)/Direct Current (DC) power supplies, power distribution units, and industrial applications. It includes dual-channel delta-sigma Analog-to-Digital Converters (ADCs), a 16-bit calculation engine, EEPROM, and a flexible two-wire interface. An integrated low-drift voltage reference addition to 94.5 dB of SINAD performance on each measurement channel allows for better than 0.1% accurate designs across a 4000:1 dynamic range.
MCP39F501 Features
- Power monitoring accuracy capable of 0.1% error across 4000:1 dynamic range.
- Fast calibration routines.
- Programmable event notifications such as over-current and voltage sag surge protection.
- 512 bytes user-accessible EEPROM through page read/write commands.
- Non-volatile on-chip memory, no external memory required.
- Built-in calculations on fast 16-bit processing core.
- Active, reactive, and apparent power.
- True Root-Mean-Square (RMS) current and RMS voltage.
- Line frequency and power factor.
- Two-wire serial protocol using a two-wire Universal Asynchronous Receiver Transmitter (UART) interface supporting multiple devices on a single bus.
- Low-drift internal voltage reference, 10 ppm/°C typical.
- 28-lead 5 x 5 QFN package.
- Extended temperature range -40 °C to +125 °C.
MCP39F501 Target Applications
- Real-time measurement of Input Power for AC/DC supplies.
- Intelligent power distribution units.
MCP39F501 Block Diagram
MCP39F501 Pin Descriptions
| MCP39F501 5x5 QFN | Symbol | Function |
|---|---|---|
| 1 | MODE/DIR | Single or Multiple Device mode with direction control for RS-485 drivers |
| 2 | NC | No Connect (must be left floating) |
| 3 | NC | No Connect (must be left floating) |
| 4 | UART_RX | UART Communication RX Pin |
| 5 | COMMONA | Common pin A, to be connected to COMMONB |
| 6 | OSCI | Oscillator Crystal Connection Pin or External Clock Input Pin |
| 7 | OSCO | Oscillator Crystal Connection Pin |
| 8 | NC | No Connect (must be left floating) |
| 9 | NC | No Connect (must be left floating) |
| 10 | MCLR | Reset Pin for Delta Sigma ADCs |
| 11 | AVDD | Analog Power Supply Pin |
| 12 | UART_TX | UART Communication TX Pin |
| 13 | COMMONB | Common pin B, to be connected to COMMONA |
| 14 | A0/DIO0 | Address Select Pin 0 / Configurable digital I/O 0 |
| 15 | A1/DIO1 | Address Select Pin 1 / Configurable digital I/O 1 |
| 16 | I1+ | Non-Inverting Current Channel Input for 24-bit ∆∑ ADC |
| 17 | I1- | Inverting Current Channel Input for 24-bit ∆∑ ADC |
| 18 | V1- | Inverting Voltage Channel Input for 24-bit ∆∑ ADC |
| 19 | V1+ | Non-Inverting Voltage Channel Input for 24-bit ∆∑ ADC |
| 20 | AN_IN/DIO2 | Analog Input for SAR ADC / Configurable Digital Input/Output 2 Pin |
| 21 | AGND | Analog Ground Pin, Return Path for internal analog circuitry |
| 22 | DIO3 | Configurable Digital Input/Output 3 |
| 23 | REFIN+/OUT | Non-Inverting Voltage Reference Input and Internal Reference Output Pin |
| 24 | DGND | Digital Ground Pin, Return Path for internal digital circuitry |
| 25 | DVDD | Power Supply Pin |
| 26 | MCLR | Master Clear for Device |
| 27 | DGND | Digital Ground Pin, Return Path for internal digital circuitry |
| 28 | DR | Data Ready (must be left floating) |
| 29 | EP | Exposed Thermal Pad (to be connected to DGND) |
MCP39F501 Application Example - Single Phase, Two-Wire Application
