MICROCHIP MCP3221A5T-I/OT

A successive approximation A/D converter (ADC) with a 12-bit resolution. Available in the SOT-23 package, this device provides one single-ended input with very low-power consumption. It 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 device is performed using a 2-wire, I²C compatible interface. Standard (100 kHz) and Fast (400 kHz) I²C modes are available with the device. An on-chip conversion clock enables independent timing for the I²C and conversion clocks. The device is also addressable, allowing up to eight devices on a single 2-wire bus. The device runs on a single-supply voltage that operates over a broad range of 2.7V to 5.5V. This device also provides excellent linearity of ±1 LSB differential nonlinearity (DNL) and ±2 LSB integral nonlinearity (INL), maximum.

• 12-bit Resolution
• ±1 LSB DNL, ±2 LSB INL maximum
• 250 μA Max Conversion Current
• 5 nA Typical Standby Current, 1 μA maximum
• I²C Compatible Serial Interface - 100 kHz I²C Standard mode - 400 kHz I²C Fast mode
• Up to 8 Devices on a Single 2-wire Bus
• 22.3 ksps in I²C Fast mode
• Single-Ended Analog Input Channel
• On-Chip Sample and Hold
• On-Chip Conversion Clock
• Single-Supply Specified Operation: 2.7V to 5.5V
• Temperature Range: Extended: -40°C to +125°C
• Small SOT-23-5 package

• Data Logging
• Multi-Zone Monitoring
• Handheld Portable Applications
• Battery-Powered Test Equipment
• Remote or Isolated Data Acquisition