Microchip Technology MCP3221 A/D Converters

Microchip Technology MCP3221 A/D Converters are successive approximation analog to digital converters with 12-bit resolution. These Microchip A/D converters are based on advanced CMOS technology and provide a maximum standby current of 1µA and 250µA conversion current. The MCP3221 A/D converters feature single-ended input, low power consumption, on-chip conversion clock, I²C™ compatible serial interface, on-chip sample, and hold. These A/D converters communicate via a 2-wire I²C compatible interface, which includes both 100kHz standard and 400kHz fast modes.

The MCP3221 A/D converters use the on-chip conversion clock to independently time the I²C interface and conversion clocks. These A/D converters also provide excellent linearity of ±2 Least Significant Bit (LSB) and ±1 LSB differential non-linearity. Typical applications include data logging, multi-zone monitoring, hand-held portable devices, battery-powered test equipment, and remote or isolated data acquisition.

Features

12-bit resolution
250µA maximum conversion current
1µA maximum standby current
I²C compatible serial interface
- 100kHz standard mode
- 400kHz fast mode
Up to 8 devices on a single 2-wire bus
22.3ksps in I²C fast mode

Single-ended analog input channel
On-chip sample and hold
On-chip conversion clock
2.7V to 5.5V single-supply specified operation
Temperature range
- -40°C to 85°C industrial temperature range
- -40°C to 125°C extended temperature range

Applications

Data logging
Multi-zone monitoring
Hand-held portable applications

Battery-powered test equipment
Remote or isolated data acquisition

MCP3221 A/D Converter Block Diagram

Block Diagram - Microchip Technology MCP3221 A/D Converters

Additional Resources

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