MCP3221 Microchip Technology, MCP3221 Datasheet
MCP3221
Manufacturer Part Number
MCP3221
Description
Low Power 12-Bit A/D Converter With I2C Interface
Manufacturer
Microchip Technology
Datasheet
1.MCP3221.pdf
(27 pages)
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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
• Up to 8 devices on a single 2-Wire bus
• 22.3 ksps in I
• 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:
• Small SOT-23 package
Applications
• Data Logging
• Multi-zone Monitoring
• Hand-Held Portable Applications
• Battery-Powered Test Equipment
• Remote or Isolated Data Acquisition
Package Type
M
- 100 kHz I
- 400 kHz I
- Industrial: -40°C to +85°C
- Extended: -40°C to +125°C
2003 Microchip Technology Inc.
5-Pin SOT-23A
2
C™ compatible serial interface
Low Power 12-Bit A/D Converter With I
V
V
AIN
DD
SS
2
2
C Standard Mode
C Fast Mode
2
C Fast Mode
1
2
3
5
4
SDA
SCL
Description
The Microchip Technology Inc. MCP3221 is a succes-
sive approximation A/D converter with 12-bit resolu-
tion. Available in the SOT-23 package, this device
provides one single-ended input with very low power
consumption. Based on an advanced CMOS technol-
ogy, the MCP3221 provides a low maximum conver-
sion 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
applications.
Communication to the MCP3221 is performed using a
2-wire, I
and Fast (400 kHz) I
device. An on-chip conversion clock enables indepen-
dent timing for the I
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 2.7V to 5.5V. This
device also provides excellent linearity of ±1 LSB differ-
ential non-linearity and ±2 LSB integral non-linearity,
maximum.
Functional Block Diagram
AIN
Sample
2
C compatible interface. Standard (100 kHz)
Hold
and
MCP3221
Control Logic
Clock
and
2
2
2
C modes are available with the
C™ Interface
C and conversion clocks. The
DAC
remote
–
+
Comparator
data
I
2
DS21732B-page 1
12-bit SAR
C™ Interface
V
SCL
DD
acquisition
V
SDA
SS
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