M
Features
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10-bit resolution
±1 LSB DNL, ±1 LSB INL max.
250 µA max conversion current
5 nA typical standby current, 1 µA max.
I
2
C™ compatible serial interface
- 100 kHz I
2
C Standard mode
- 400 kHz I
2
C Fast mode
Up to 8 devices on single 2-wire bus
22.3 ksps in I
2
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
MCP3021
Description
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.
Communication to the MCP3021 is performed using a
2-wire I
2
C compatible interface. Standard (100 kHz)
and Fast (400 kHz) I
2
C modes are available with the
device. An on-chip conversion clock enables indepen-
dent timing for the I
2
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.
Low Power 10-Bit A/D Converter With I
2
C™ Interface
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Applications
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Data Logging
Multi-zone Monitoring
Hand Held Portable Applications
Battery Powered Test Equipment
Remote or Isolated Data Acquisition
Functional Block Diagram
V
DD
V
SS
Package Type
5-Pin SOT-23A
V
DD
1
V
SS
2
5
SCL
Sample
and
Hold
Clock
Control Logic
AIN 3
4
SDA
I
2
C™
Interface
SCL
SDA
DAC
Comparator
10-Bit SAR
–
+
AIN
2003 Microchip Technology Inc.
MCP3021
DS21805A-page 1