MCP3221

Features:

• 12-bit resolution
• ±1 LSB DNL, ±2 LSB INL max.
• 250 µA max conversion current
• 5 nA typical standby current, 1 µA max.
• I 2C™ 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 I 2C 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:
- Industrial: -40°C to +85°C
- Extended: -40°C to +125°C
• Small SOT-23 package




Application

• Data Logging
• Multi-zone Monitoring
• Hand-Held Portable Applications
• Battery-Powered Test Equipment
• Remote or Isolated Data Acquisition




Specifications

Parameter Name	Value
Max Sample Rate (ksamples/sec)	22
Max. INL ± (LSB)	2
Max. Supply Current (A)	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

VDD...................................................................................7.0V
Analog input pin w.r.t. VSS.......... ............. -0.6V to VDD +0.6V
SDA and SCL pins w.r.t. VSS........... ......... -0.6V to VDD +1.0V
Storage temperature ..................................-65°C to +150°C
Ambient temp. with power applied .............-65°C to +125°C
Maximum Junction Temperature.......... .........................150°C
ESD protection on all pins (HBM) ......... ........................ 4kV

Description

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 A and 1 A 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 MCP3221 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.