MCP3021 Datasheet, PDF (1/26 Pages) Microchip Technology – Low Power 10-Bit A/D Converter With I2C™ Interface

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MCP3021
Low Power 10-Bit A/D Converter With I²C™ Interface
Features
• 10-bit resolution
• ±1 LSB DNL, ±1 LSB INL max.
• 250 µA max conversion current
• 5 nA typical standby current, 1 µA max.
• I²C™ compatible serial interface
- 100 kHz I²C Standard mode
- 400 kHz I²C Fast mode
• Up to 8 devices on 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 package
Applications
• Data Logging
• Multi-zone Monitoring
• Hand Held Portable Applications
• Battery Powered Test Equipment
• Remote or Isolated Data Acquisition
Package Type
5-Pin SOT-23A
V_DD 1
V_SS 2
AIN 3
5 SCL
4 SDA
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 I²C compatible interface. Standard (100 kHz)
and Fast (400 kHz) I²C modes are available with the
device. An on-chip conversion clock enables indepen-
dent timing for the I²C 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.
Functional Block Diagram
V_DD V_SS
DAC
Sample
AIN
and
Hold
Comparator
–
10-Bit SAR
+
Clock
Control Logic
I²C™
Interface
SCL SDA
 2003 Microchip Technology Inc.
DS21805A-page 1