MCP3918
The MCP3918 is a 2.7V to 3.6V single channel Analog Front End (AFE) containing a Delta-Sigma Analog-to-Digital Converter (ADC), PGA, internal voltage
reference, modulator output block, and highspeed 20 MHz SPI compatible serial interface. For polyphase shunt based energy meters, the MCP3918 2-wire serial
interface greatly reduces system cost requiring only a single bidirectional isolator per phase. The MCP3918 is capable of interfacing a large variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors
Features- 16/24-bit Resolution Delta-Sigma A/D Converter
- Flexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy meters
- 93.5 dB SINAD, -106.5 dBc THD
- 2.7V - 3.6V AVDD, DVDD
- Programmable Data Rate up to 125 ksps- 4 MHz Maximum Sampling Frequency
- Oversampling Ratio up to 4096
- Ultra Low Power Shutdown Mode with <2 µA
- Low Drift 1.2V Internal Voltage Reference: 9 ppm/°C
- Differential Voltage Reference Input Pins
- High Gain PGA on Each Channel (up to 32V/V)
- Phase Delay Compensation with 1 µs Time Resolution
- Separate Data Ready Pin for Easy Synchronization
- 24-bit Digital Offset and Gain Error Correction
- High-Speed 20 MHz SPI Interface with Mode 0,0 and 1,1 Compatibility
- Continuous Read/Write Modes for Minimum Communication
- Low Power Consumption
- Available in Small 20-lead QFN and SSOP Packages
- Specifications valid down to -45°C operation
| Parameter|
Parameter Name
Value
| Value | |
Measurement Error
0.1%
|
0.1%
| |
Dynamic Range
10000:1
|
10000:1
| |
Voltage Reference Drift ppm typ
9
|
9
| |
PSRR % typ
-73 dB
|
-73 dB
| |
Temp. Range (°C)
-40 to 125
|
-40 to 125
| |
Analog Supply Voltage AVdd Range (V)
2.7 to 3.6
|
2.7 to 3.6
| |
Digital Supply Voltage DVdd Range (V)
2.7 to 3.6
|
2.7 to 3.6
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MCP3918A1-E/ML | 20 | QFN | -40C to +125C | TUBE | 1.60 | 1.33 | 1.21 | 1.17 | 1.16 |
| MCP3918A1-E/SS | 20 | SSOP | -40C to +125C | TUBE | 1.55 | 1.29 | 1.18 | 1.14 | 1.12 |
| MCP3918A1T-E/ML | 20 | QFN | -40C to +125C | T/R | 1.60 | 1.33 | 1.21 | 1.17 | 1.16 |
| MCP3918A1T-E/SS | 20 | SSOP | -40C to +125C | T/R | 1.55 | 1.29 | 1.18 | 1.14 | 1.12 |
Similar Devices
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MCP3918A1-E/ML | 0.043100 | 0.076923 | 20 | QFN | 4x4x0.9mm | Matte Tin | e3 |  |  |
| MCP3918A1T-E/ML | 0.043100 | 0.212121 | 20 | QFN | 4x4x0.9mm | Matte Tin | e3 | | |
| MCP3918A1-E/SS | 0.164200 | 0.343284 | 20 | SSOP | .209in | Matte Tin | e3 | | |
| MCP3918A1T-E/SS | 0.164200 | 0.416250 | 20 | SSOP | .209in | Matte Tin | e3 | | |
