MCP3424EV Microchip Technology, MCP3424EV Datasheet - Page 30

• Manufacturer Part Number: MCP3424EV
• Description: EVALUATION BOARD FOR MCP3424
• Manufacturer: Microchip Technology

Specifications of MCP3424EV

• Number Of Adc's: 1
• Number Of Bits: 18
• Sampling Rate (per Second): 3.75 ~ 240
• Data Interface: I²C
• Inputs Per Adc: 4 Differential
• Input Range: ±2.048 V
• Power (typ) @ Conditions: 135µA @ 240sps
• Voltage Supply Source: Single Supply
• Operating Temperature: -55°C ~ 125°C
• Utilized Ic / Part: MCP3424
• Processor To Be Evaluated: MCP3424
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP3424
Equation 6-2
expected number of output code with various PGA gain
settings for Type K thermocouple output.
EQUATION 6-2:
FIGURE 6-6:
Figure 6-6
pressure and temperature. The pressure is measured
by using NPP 301 (manufactured by GE NovaSensor),
and temperature is measured by a thermistor. The
pressure sensor output is 20 mV/V. This gives 100 mV
of full scale output for V
DS22088A-page 30
Where:
Expected
Number of Output Code =
1 LSB = 15.625 µV with 18 Bit configuration.
Thermistor
shows an example of measuring both
shows an example of calculating the
V
DD
V
R
DD
R
1
2
Pressure Sensor
EXPECTED NUMBER OF
OUTPUT CODE FOR TYPE
K THERMOCOUPLE
Example of Pressure and Temperature Measurement.
DD
(NPP301)
of 5V (sensor excitation volt-
= 11.6 bits for PGA = 1
= 12.6 bits for PGA = 2
= 13.6 bits for PGA = 4
= 14.6 bits for PGA = 8
log
0.1 µF
2
⎛
⎜
⎜
⎝
10 µF
----------------------- -
15.625μV
----------------------- -
50 mV
PGA
V
IN
=
5 kΩ
1
2
3
4
5
6
7
⎞
⎟
⎟
⎠
------------------
R
CH1+
CH1-
CH2+
CH2-
V
V
SDA
R
1
SS
DD
MCP3424
1
R
+
and R
2
R
2
2
CH4+
CH3+
for CH2+ and CH3+ pins.
= Voltage Divider
CH4-
CH3-
Adr1
Adr0
SCL
age).
the number of output code for the full scale output of the
NPP301.
5 kΩ
13
12
10
14
11
9
8
Equation 6-3
V
DD
(MASTER)
V
T
DD
O
shows an example of calculating
MCU
© 2008 Microchip Technology Inc.
V
DD
R
R
2
1
Pressure Sensor
V
DD
(NPP301)
Thermistor