ADC0803LCN/NOPB National Semiconductor, ADC0803LCN/NOPB Datasheet - Page 17

• Manufacturer Part Number: ADC0803LCN/NOPB
• Description: IC ADC 8BIT MPU COMPAT 20-DIP
• Manufacturer: National Semiconductor

Specifications of ADC0803LCN/NOPB

• Number Of Bits: 8
• Number Of Converters: 1
• Power Dissipation (max): 875mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Number Of Elements: 1
• Resolution: 8Bit
• Architecture: SAR
• Sample Rate: 10KSPS
• Input Polarity: Unipolar
• Input Type: Voltage
• Rated Input Volt: 5V
• Differential Input: Yes
• Power Supply Requirement: Single
• Single Supply Voltage (typ): 5V
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 6.3V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Power Dissipation: 875mW
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 20
• Package Type: PDIP
• Input Signal Type: Differential
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *ADC0803LCN

Functional Description
of analog input voltage that provides the same digital output
code) is therefore 1 LSB wide.
Figure 2 shows a worst case error plot for the ADC0801. All
center-valued inputs are guaranteed to produce the correct
output codes and the adjacent risers are guaranteed to be
no closer to the center-value points than
words, if we apply an analog input equal to the center-value
digital code. The maximum range of the position of the code
transition is indicated by the horizontal arrow and it is guar-
anteed to be no more than
The error curve of Figure 3 shows a worst case error plot for
the ADC0802. Here we guarantee that if we apply an analog
input equal to the LSB analog voltage center-value the A/D
will produce the correct digital code.
±
±
1
1
⁄
⁄
2
4
LSB from the ideal center-values. Each tread (the range
LSB, we guarantee that the A/D will produce the correct
Transfer Function
Transfer Function
1
⁄
2
LSB.
FIGURE 1. Clarifying the Error Specs of an A/D Converter
FIGURE 2. Clarifying the Error Specs of an A/D Converter
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(Continued)
±
1
⁄
4
Accuracy=
LSB. In other
Accuracy=
±
0 LSB: A Perfect A/D
17
±
1
Next to each transfer function is shown the corresponding
error plot. Many people may be more familiar with error plots
than transfer functions. The analog input voltage to the A/D
is provided by either a linear ramp or by the discrete output
steps of a high resolution DAC. Notice that the error is
continuously displayed and includes the quantization uncer-
tainty of the A/D. For example the error at point 1 of Figure 1
is +
advance of the center-value of the tread. The error plots
always have a constant negative slope and the abrupt up-
side steps are always 1 LSB in magnitude.
⁄
4
LSB
1
⁄
2
LSB because the digital code appeared
Error Plot
Error Plot
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1
⁄
2
LSB in