MCP3204/3208
2.7V 4-Channel/8-Channel 12-Bit A/D Converters
with SPI Serial Interface
Features
Description
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The Microchip Technology Inc. MCP3204/3208
devices are successive approximation 12-bit Analogto-Digital (A/D) Converters with on-board sample and
hold circuitry. The MCP3204 is programmable to
provide two pseudo-differential input pairs or four
single-ended inputs. The MCP3208 is programmable
to provide four pseudo-differential input pairs or eight
single-ended inputs. Differential Nonlinearity (DNL) is
specified at ±1 LSB, while Integral Nonlinearity (INL) is
offered in ±1 LSB (MCP3204/3208-B) and ±2 LSB
(MCP3204/3208-C) versions.
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12-bit resolution
± 1 LSB max DNL
± 1 LSB max INL (MCP3204/3208-B)
± 2 LSB max INL (MCP3204/3208-C)
4 (MCP3204) or 8 (MCP3208) input channels
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 VDD = 5V
50 ksps max. sampling rate at VDD = 2.7V
Low power CMOS technology:
- 500 nA typical standby current, 2 µA max.
- 400 µA max. active current at 5V
Industrial temp range: -40°C to +85°C
Available in PDIP, SOIC and TSSOP packages
Applications
Sensor Interface
Process Control
Data Acquisition
Battery Operated Systems
Package Types
PDIP, SOIC, TSSOP
CH0
CH1
CH2
CH3
NC
NC
DGND
Functional Block Diagram
VDD VSS
VREF
CH0
CH1
1
2
3
4
5
6
7
MCP3204
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Communication with the devices is accomplished using
a simple serial interface compatible with the SPI
protocol. The devices are capable of conversion rates
of up to 100 ksps. The MCP3204/3208 devices operate
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 320 µA,
respectively. The MCP3204 is offered in 14-pin PDIP,
150 mil SOIC and TSSOP packages. The MCP3208 is
offered in 16-pin PDIP and SOIC packages.
14
13
12
11
10
9
8
VDD
VREF
AGND
CLK
DOUT
DIN
CS/SHDN
PDIP, SOIC
Input
Channel
Mux
DAC
Comparator
12-Bit SAR
Sample
and
Hold
Control Logic
CS/SHDN DIN
CLK
Shift
Register
1
2
3
4
5
6
7
8
MCP3208
CH7*
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
16
15
14
13
12
11
10
9
VDD
VREF
AGND
CLK
DOUT
DIN
CS/SHDN
DGND
DOUT
* Note: Channels 5-7 available on MCP3208 Only
© 2008 Microchip Technology Inc.
DS21298E-page 1
