MCP3202_06 Datasheet, PDF (1/28 Pages) Microchip Technology – 2.7V Dual Channel 12-Bit A/D Converter with SPI Serial Interface

MCP3202
2.7V Dual Channel 12-Bit A/D Converter
with SPI Serial Interface
Features
• 12-bit resolution
• ±1 LSB max DNL
• ±1 LSB max INL (MCP3202-B)
• ±2 LSB max INL (MCP3202-C)
• Analog inputs programmable as single-ended or
pseudo-differential pairs
• On-chip sample and hold
• SPI serial interface (modes 0,0 and 1,1)
• Single supply operation: 2.7V-5.5V
• 100 ksps max. sampling rate at V_DD = 5V
• 50 ksps max. sampling rate at V_DD = 2.7V
• Low power CMOS technology
- 500 nA typical standby current, 5 μA max.
- 550 µA max. active current at 5V
• Industrial temp range: -40°C to +85°C
• 8-pin MSOP, PDIP, SOIC and TSSOP packages
Applications
• Sensor Interface
• Process Control
• Data Acquisition
• Battery Operated Systems
Description
The Microchip Technology Inc. MCP3202 is a succes-
sive approximation 12-bit Analog-to-Digital (A/D)
Converter with on-board sample and hold circuitry. The
MCP3202 is programmable to provide a single pseudo-
differential input pair or dual single-ended inputs. Differ-
ential Nonlinearity (DNL) is specified at ±1 LSB, and
Integral Nonlinearity (INL) is offered in ±1 LSB
(MCP3202-B) and ±2 LSB (MCP3202-C) versions.
Communication with the device is done using a simple
serial interface compatible with the SPI protocol. The
device is capable of conversion rates of up to 100 ksps
at 5V and 50 ksps at 2.7V. The MCP3202 device oper-
ates over a broad voltage range (2.7V-5.5V). Low-
current design permits operation with typical standby
and active currents of only 500 nA and 375 μA, respec-
tively. The MCP3202 is offered in 8-pin MSOP, PDIP,
TSSOP and 150 mil SOIC packages.
Package Types
PDIP, MSOP, SOIC, TSSOP
CS/SHDN 1
CH0 2
CH1 3
V_SS 4
8 V_DD/V_REF
7 CLK
6
D_OUT
5 _DIN
Functional Block Diagram
V_DD V_SS
CH0
CH1
Input
Channel
Mux
Sample
and
Hold
DAC
Comparator
12-Bit SAR
Control Logic
Shift
Register
CS/SHDN D_IN CLK
D_OUT
© 2006 Microchip Technology Inc.
DS21034D-page 1