Introduces the main features of MCP3905/06 devices, including support for IEC 62053 International Metering Standard Specification, dynamic range of 500:1 and 1000:1, 0.1% typical measurement error, 16-bit, Delta-Sigma analog-to-digital converters and 15 ppm/°C ultra-low drift on-chip reference
The MCP3905/06 devices are energy‑metering integrated circuits that provide active (real) power measurement for single‑phase residential meters. They support IEC 62053 specifications and output both average and instantaneous power pulses for calibration.
The ICs include two 16‑bit delta‑sigma ADCs, a programmable gain amplifier (16:1 for MCP3905, 32:1 for MCP3906), an ultra‑low drift 2.4 V reference, and drive capability for mechanical counters and stepper motors. Operating temperature ranges from –40 °C to +85 °C and they are supplied in a 24‑pin SSOP package.
| Operating Voltage | 4.5 V to 5.5 V |
|---|---|
| Reference Voltage | 2.4 V |
| Industrial Temperature Range | -40 °C to +85 °C |
| PGA Gain (MCP3905) | 16:1 |
| PGA Gain (MCP3906) | 32:1 |
The on‑chip reference voltage is 2.4 V.
The devices operate from –40 °C to +85 °C (industrial range).
The MCP3906 provides a 32:1 programmable gain amplifier.