MCP3021
M
Low Power 10-Bit A/D Converter With I2C™ Interface
Features
Description
• 10-bit resolution
The Microchip Technology Inc. MCP3021 is a succes-
sive approximation A/D converter (ADC) with 10-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 MCP3021 provides a low maximum
conversion current and standby current of 250 µA and
1 µA, respectively. Low current consumption, com-
bined with the small SOT-23 package, make this
device ideal for battery-powered and remote data
acquisition applications.
• ±1 LSB DNL, ±1 LSB INL max.
• 250 µA max conversion current
• 5 nA typical standby current, 1 µA max.
2
• I C™ compatible serial interface
2
- 100 kHz I C Standard mode
2
- 400 kHz I C Fast mode
• Up to 8 devices on single 2-wire bus
2
• 22.3 ksps in I C 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 package
Communication to the MCP3021 is performed using a
2
2-wire I C compatible interface. Standard (100 kHz)
2
and Fast (400 kHz) I C modes are available with the
device. An on-chip conversion clock enables indepen-
2
dent timing for the I C and conversion clocks. The
device is also addressable, allowing up to eight devices
on a single 2-wire bus.
The MCP3021 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 (DNL) and ±1 LSB integral non-
linearity (INL), maximum.
Applications
• Data Logging
• Multi-zone Monitoring
• Hand Held Portable Applications
• Battery Powered Test Equipment
• Remote or Isolated Data Acquisition
Functional Block Diagram
V
V
SS
DD
Package Type
5-Pin SOT-23A
DAC
Comparator
–
+
Sample
and
10-Bit SAR
5
4
1
2
V
SCL
SDA
DD
AIN
Hold
Clock
Control Logic
V
SS
2
I C™
Interface
3
AIN
SCL SDA
2003 Microchip Technology Inc.
DS21805A-page 1