MCP3423-E/MF Microchip Technology, MCP3423-E/MF Datasheet - Page 32

• Manufacturer Part Number: MCP3423-E/MF
• Description: IC ADC 18BIT 3.75SPS 2CH 10-DFN
• Manufacturer: Microchip Technology

Specifications of MCP3423-E/MF

• 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: 10-DFN
• 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: DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP3423EV - BOARD EVAL 18BIT 2CH ADC MCP3423
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP3422/3/4
6.1.4
The user can test the presence of the MCP3422/3/4 on
the I
conversion. This test can be achieved by checking an
acknowledge response from the MCP3422/3/4 after
sending a read or write command. Here is an example
using
a.
b.
c.
FIGURE 6-3:
DS22088C-page 32
SDA
SCL
Set the R/W bit “HIGH” in the address byte.
Check the ACK pulse after sending the address
byte.
If the device acknowledges (ACK = 0), then the
device is connected, otherwise it is not
connected.
Send STOP or START bit.
2
Figure
C bus line without performing an input data
Start
Bit
DEVICE CONNECTION TEST
6-3:
1
1
Device bits
2
1 0
3
Address Byte
I
2
4
1 A2 A1 A0 1
C Bus Connection Test.
Address bits
5
6
7
8
R/W
MCP342X
9
Response
Stop
Bit
6.1.5
Figure 6-4
differential and single-ended inputs. Differential input
signals can be connected to the CHn+ and CHn- input
pins, where n = the channel number (1, 2, 3, or 4). For
the single-ended input, the input signal is applied to one
of the input pins (typically connected to the CHn+ pin)
while the other input pin (typically CHn- pin) is
grounded. All device characteristics hold for the single-
ended configuration, but this configuration loses one bit
resolution because the input can only stand in positive
half scale. Refer to Section 1.0 “Electrical Character-
istics”.
FIGURE 6-4:
Ended Input Connections.
Excitation
Excitation
(b) Single-ended Input Signal Connection:
(a) Differential Input Signal Connection:
Sensor
DIFFERENTIAL AND SINGLE-
ENDED CONFIGURATION
shows typical connection examples for
R
R
Sensor
1
2
Differential and Single-
Input Signal
Input Signal
© 2009 Microchip Technology Inc.
CHn-
CHn-
CHn+
CHn+
MCP342X
MCP342X