MCP3204/3208
2.7V 4-Channel/8-Channel 12-Bit A/D Converters
with SPI™ Serial Interface
Features
Description
• 12-bit resolution
The Microchip Technology Inc. MCP3204/3208
devices are successive approximation 12-bit Analog-
to-Digital (A/D) Converters with on-board sample and
hold circuitry. The MCP3204 is programmable to pro-
vide two pseudo-differential input pairs or four single-
ended inputs. The MCP3208 is programmable to pro-
vide four pseudo-differential input pairs or eight single-
ended inputs. Differential Nonlinearity (DNL) is speci-
fied at ±1 LSB, while Integral Nonlinearity (INL) is
offered in ±1 LSB (MCP3204/3208-B) and ±2 LSB
(MCP3204/3208-C) versions.
• ± 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:
Communication with the devices is accomplished using
a simple serial interface compatible with the SPI proto-
col. 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, respec-
tively. 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.
- 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
Functional Block Diagram
• Process Control
VSS
VDD
• Data Acquisition
VREF
• Battery Operated Systems
CH0
CH1
Input
Channel
Mux
Package Types
PDIP, SOIC, TSSOP
DAC
CH7*
Comparator
CH0
CH1
CH2
CH3
NC
1
2
3
4
5
6
7
14
13
VDD
VREF
12-Bit SAR
Sample
12 AGND
and
CLK
11
10
9
Hold
DOUT
DIN
Shift
Register
NC
Control Logic
DGND
8
CS/SHDN
PDIP, SOIC
CS/SHDN DIN
CLK
DOUT
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
1
16 VDD
VREF
15
14 AGND
13 CLK
* Note: Channels 5-7 available on MCP3208 Only
2
3
4
5
12 DOUT
DIN
6
7
8
11
10
9
CS/SHDN
DGND
© 2007 Microchip Technology Inc.
DS21298D-page 1