MCP3301-BI/SN Microchip Technology, MCP3301-BI/SN Datasheet - Page 20

• Manufacturer Part Number: MCP3301-BI/SN
• Description: IC ADC 13BIT 2.7V SPI 8-SOIC
• Manufacturer: Microchip Technology

Specifications of MCP3301-BI/SN

• Package / Case: 8-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
• Input Signal Type: Pseudo-Differential, Differential
• Minimum Operating Temperature: - 40 C
• Resolution (bits): 13bit
• Sampling Rate: 100kSPS
• Input Channel Type: Differential
• Supply Voltage Range - Analogue: 2.7V To 5.5V
• Supply Current: 300µA
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: TMPSNS-RTD1 - BOARD EVAL PT100 RTD TEMP SENSOR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP3301
7.0
7.1
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 Figure 7-1 shows the output
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 are
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
IN+, the 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 7-1
FIGURE 7-1:
DS21700C-page 20
Scale Output = -V
Negative Full
-V
SERIAL COMMUNICATIONS
Output Code Format
REF
REF
REF
- 1 LSB. When IN- is larger than
Output Code Transfer Function.
IN+ < IN-
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)
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 7-1:
(IN+)-(IN-) = V
(IN+)-(IN-) = V
(IN+)-(IN-) = V
(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-
REF
REF
REF
REF
IN+ > IN-
-1 LSB
-2 LSB
-2 LSB
-1 LSB
BINARY TWO’S
COMPLEMENT OUTPUT
CODE EXAMPLES.
Scale Output = V
Sign
Bit
0
0
0
0
0
1
1
1
1
© 2007 Microchip Technology Inc.
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
REF
Analog Input
-1 LSB
IN+ - IN-
Voltage
Decimal
+4095
+4094
-4095
-4096
DATA
+2
+1
-1
-2
0