MCP3422A0-E/MS Microchip Technology, MCP3422A0-E/MS Datasheet - Page 11

• Manufacturer Part Number: MCP3422A0-E/MS
• Description: IC ADC 18BIT 3.75SPS 2CH 8-MSOP
• Manufacturer: Microchip Technology

Specifications of MCP3422A0-E/MS

• Data Interface: I²C, Serial
• Number Of Bits: 18
• Sampling Rate (per Second): 3.75
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Resolution (bits): 18bit
• Sampling Rate: 3.75SPS
• Input Channel Type: Differential
• Supply Voltage Range - Analog: 2.7V To 5.5V
• Supply Current: 145µA
• Digital Ic Case Style: SOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP3422EV - BOARD EVAL MCP3422 PICKIT SERIAL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
CHn+ and CHn- are differential input pins for
channel n. The user can also connect CHn- pin to V
for a single-ended operation. See
differential and single-ended connection examples.
The maximum voltage range on each differential input
pin is from V
above this range will cause leakage currents through
the Electrostatic Discharge (ESD) diodes at the input
pins.
This ESD current can cause unexpected performance
of the device. The input voltage at the input pins should
be within the specified operating range defined in
Section 1.0
Section 4.0 “Description of Device Operation”.
See Section 4.5 “Input Voltage Range” for more
details of the input voltage range.
Figure 3-1
device uses a switched capacitor input stage at the
front end. C
typically about 4 pF. D
C
© 2009 Microchip Technology Inc.
SAMPLE
DFN
—
—
—
—
—
—
1
2
7
8
6
3
4
5
9
MCP3422
PIN DESCRIPTIONS
is the differential input sampling capacitor.
Analog Inputs (CHn+, CHn-)
shows the input structure of the device. The
MSOP,
SS
SOIC
PIN
—
—
—
—
—
—
—
-0.3V to V
1
2
7
8
6
3
4
5
“Electrical
is the package pin capacitance and
PIN FUNCTION TABLE
1
DFN
10
11
DD
—
—
—
—
1
2
4
5
3
6
7
8
9
and D
MCP3423
+0.3V. Any voltage below or
Characteristics”
2
MSOP
are the ESD diodes.
10
—
—
—
—
—
1
2
4
5
3
6
7
8
9
Figure 6-4
Table
MCP3424
TSSOP
SOIC,
10
12
13
14
11
—
1
2
3
4
5
6
7
8
9
3-1.
and
for
SS
CH1+
CH2+
CH3+
CH4+
CH1-
CH2-
CH3-
CH4-
Sym
Adr0
Adr1
SDA
SCL
V
V
EP
SS
DD
3.2
V
requires an appropriate bypass ceramic capacitor of
about 0.1 µF to ground to attenuate high frequency
noise presented in application circuit board. An
additional 10 µF capacitor (tantalum) in parallel is also
recommended to further attenuate current spike
noises. The supply voltage (V
in the 2.7V to 5.5V range for specified operation.
V
device. The user must connect the V
plane through a low impedance connection. If an
analog ground path is available in the application PCB
(printed circuit board), it is highly recommended that
the V
isolated within an analog ground plane of the circuit
board.
DD
SS
Positive Differential Analog Input Pin of Channel 1
Negative Differential Analog Input Pin of Channel 1
Positive Differential Analog Input Pin of Channel 2
Negative Differential Analog Input Pin of Channel 2
Ground Pin
Positive Supply Voltage Pin
Bidirectional Serial Data Pin of the I
Serial Clock Pin of the I
I
I
Positive Differential Analog Input Pin of Channel 3
Negative Differential Analog Input Pin of Channel 3
Positive Differential Analog Input Pin of Channel 4
Negative Differential Analog Input Pin of Channel 4
Exposed Thermal Pad (EP); must be connected to
V
2
2
SS
C Address Selection Pin. See Section 5.3.2.
C Address Selection Pin. See Section 5.3.2.
is the ground pin and the current return path of the
is the power supply pin for the device. This pin
.
SS
Supply Voltage (V
pin be tied to the analog ground path or
MCP3422/3/4
Description
2
C Interface
DD
DD
) must be maintained
, V
SS
DS22088C-page 11
2
C Interface
pin to a ground
SS
)