MCP3422 Microchip Technology Inc., MCP3422 Datasheet - Page 2

• Manufacturer Part Number: MCP3422
• Description: 18-bit, Multi-channel ?? Analog-to-digital Converter With I2c? Interface And On-board Reference
• Manufacturer: Microchip Technology Inc.

MCP3422/3/4
The MCP3422 and MCP3423 devices have two
differential input channels and the MCP3424 has
four-differential input channels. All electrical properties
of these three devices are the same except the
differences in the number of input channels and I
address bit selection options.
Package Types
Functional Block Diagram
DS22088B-page 2
CH1+
CH1+
CH1-
CH1-
SDA
V
SDA
V
DD
DD
MSOP, SOIC
1
2
3
4
1
2
3
4
* Includes Exposed Thermal Pad (EP); see
MCP3422
2x3 DFN*
EP
9
CH1+
CH2+
CH1-
CH2-
8
7
6
5
8
7
6
5 SCL
V
CH2-
CH2+
SCL
CH2-
CH2+
V
SS
SS
MCP3422
Gain = 1,2,4, or 8
PGA
CH1+
CH2+
CH2-
CH1-
V
CH1+
CH2+
SS
CH1-
CH2-
V
SS
Table
1
2
3
4
5
1
2
3
4
5
2
MCP3423
3x3 DFN*
C
V
MSOP
Voltage Reference
SS
3-1.
EP
11
Converter
Oscillator
ΔΣ ADC
(2.048V)
Clock
10
9
8
7 SDA
6 V
10
The MCP3422 is available in 8-pin SOIC, DFN, and
MSOP packages. The MCP3423 is available in 10-pin
DFN, and MSOP packages. The MCP3424 is available
in 14-pin SOIC and TSSOP packages.
9
8
7
6
V
Adr1
Adr0
SCL
SCL
DD
REF
Adr1
Adr0
SDA
V
DD
V
DD
Interface
I
2
CH1+
CH2+
CH1-
CH2-
C
SDA
V
V
DD
SS
© 2008 Microchip Technology Inc.
1
3
2
4
5
6
7
SOIC, TSSOP
SCL
SDA
14
13
12
11
10
9
8
CH4-
CH4+
CH3-
CH3+
Adr1
Adr0
SCL