The Microchip Technology Inc. MCP3221 is a successive approximation A/D converter with 12-bit resolution. Available in the SOT-23 package, this device provides one single-ended input with very low power consumption. Based on an advanced CMOS technology, the MCP3221 provides a low maximum conversion current and standby current of 250 µA and 1 µA respectively. Low current consumption combined with the small SOT-23 package make this device ideal for battery powered and remote data acquisition applications. Communication to the MCP3221 is performed using a 2-wire I2C™Compatible compatible interface. Standard (100 kHz) and Fast (400 kHz) I2C™Compatible modes are available with the device. An on-chip conversion clock enables independent timing for the I2C™Compatible clock and the conversion clock.The device is also addressable allowing up to eight devices on a single 2-wire bus. The MCP3221 runs on a single supply voltage that operates over a broad range of 2.7 V to 5.5 V. This device also provides excellent linearity of ±1 LSB differential non-linearity and ±2 LSB integral non-linearity. Operating temperature range for this device is -40°C to +85°C.
Parameter Name Value
Max Sample Rate (ksamples/sec) 22
Max. INL ± (LSB) 2
Max. Supply Current (µA) 250
Input Type Single-ended
# of Input Channels 1
Resolution (bits) 12
Interface I²C™
Temp Range (°C) -40 to +85°C
Input Voltage Range (V) 2.7 to 5.5
Features
12-bit resolution
I2C™ Compatible serial interface
±1 LSB DNL
±2 LSB INL max
22.3 ksps in I2C Fast Mode
Single-ended analog input channel
On-chip sample and hold
On-chip conversion clock
