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
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.
• ± 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
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.
- 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
Package Types
• Process Control
PDIP, SOIC, TSSOP
• Data Acquisition
CH0
CH1
CH2
CH3
NC
1
14
13
V
V
DD
• Battery Operated Systems
2
3
4
5
REF
12 AGND
CLK
11
10
Functional Block Diagram
D
D
OUT
IN
NC
9
8
6
7
VSS
VDD
DGND
CS/SHDN
VREF
PDIP, SOIC
CH0
CH1
Input
Channel
Mux
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
1
16
15
V
DD
DAC
V
2
3
4
5
REF
CH7*
14 AGND
13 CLK
Comparator
12
11
10
9
D
D
12-Bit SAR
OUT
IN
Sample
and
Hold
6
7
8
CS/SHDN
DGND
Shift
Register
Control Logic
CS/SHDNDIN CLK
DOUT
* Note: Channels 5-7 available on MCP3208 Only
© 2008 Microchip Technology Inc.
DS21298E-page 1