MCP3304-CI/SL Microchip Technology, MCP3304-CI/SL Datasheet - Page 25

• Manufacturer Part Number: MCP3304-CI/SL
• Description: IC ADC 13BIT 2.7V 4CH SPI 16SOIC
• Manufacturer: Microchip Technology

Specifications of MCP3304-CI/SL

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Number Of Bits: 13
• Sampling Rate (per Second): 100k
• Data Interface: Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Architecture: SAR
• Conversion Rate: 100 KSPs
• Resolution: 12 bit
• Input Type: Voltage
• Snr: 80.02 dB
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MCP3304CI/SL

6.0
6.1
The output code format is a binary two’s complement
scheme, with a leading sign bit that indicates the sign
of the output. If the IN+ input is higher than the IN-
input, the sign bit will be a zero. If the IN- input is higher,
the sign bit will be a ‘1’.
The diagram shown in
code transfer function. In this diagram, the horizontal
axis is the analog input voltage and the vertical axis is
the output code of the ADC. It shows that when IN+ is
equal to IN-, both the sign bit and the data word is zero.
As IN+ gets larger with respect to IN-, the sign bit is a
zero and the data word gets larger. The full scale output
code is reached at +4095 when the input [(IN+) - (IN-)]
reaches V
two’s complement output codes will be seen with the
sign bit being a one. Some examples of analog input
levels and corresponding output codes are shown in
Table
FIGURE 6-1:
© 2008 Microchip Technology Inc.
Scale Output = -V
6-1.
Negative Full
-V
SERIAL COMMUNICATIONS
Output Code Format
REF
REF
- 1 LSB. When IN- is larger than IN+, the
REF
Output Code Transfer Function.
IN+ < IN-
Figure 6-1
0 + 1111 1111 1111 (+4095)
0 + 1111 1111 1110 (+4094)
0 + 0000 0000 0011 (+3)
0 + 0000 0000 0010 (+2)
0 + 0000 0000 0001 (+1)
0 + 0000 0000 0000 (0)
shows the output
Output
Code
1 + 1111 1111 1111 (-1)
1 + 1111 1111 1110 (-2)
1 + 1111 1111 1101 (-3)
1 + 0000 0000 0001 (-4095)
1 + 0000 0000 0000 (-4096)
TABLE 6-1:
(IN+)-(IN-) = V
IN
(IN+)-(IN-)=V
Analog Input Levels
+
Full Scale Negative
IN+ = (IN-) +2 LSB
IN+ = (IN-) +1 LSB
IN+ = (IN-) - 1 LSB
IN+ = (IN-) - 2 LSB
Full Scale Positive
- IN
IN
+
-
IN+ = IN-
- IN
= -V
-
= -V
REF
REF
REF
IN+ > IN-
REF
+1 LSB
-1 LSB
-2 LSB
BINARY TWO’S
COMPLEMENT OUTPUT
CODE EXAMPLES.
Scale Output = V
MCP3302/04
Sign
Bit
0
0
0
0
0
1
1
1
1
Positive Full
1111 1111 1111
1111 1111 1110
0000 0000 0010
0000 0000 0001
0000 0000 0000
1111 1111 1111
1111 1111 1110
0000 0000 0001
0000 0000 0000
Binary Data
V
REF
DS21697E-page 25
REF
Analog Input
IN+ - IN-
-1 LSB
Voltage
Decimal
+4095
+4094
DATA
-4095
-4096
+2
+1
-1
-2
0