MCP4726A1T-E/MAY Microchip Technology, MCP4726A1T-E/MAY Datasheet - Page 60

• Manufacturer Part Number: MCP4726A1T-E/MAY
• Description: Single, 12-bit NV DAC With Ext Vref And I2C Interface 6 DFN 2x2x0.9mm T/R
• Manufacturer: Microchip Technology
• Series: -r

Specifications of MCP4726A1T-E/MAY

• Settling Time: 6µs
• Number Of Bits: 12
• Data Interface: EEPROM, I²C, Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 1.10W
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 6-VDFN Exposed Pad
• Number Of Outputs And Type: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP4706/4716/4726
7.7
The Integral nonlinearity (INL) error is the maximum
deviation of an actual transfer function from an ideal
transfer function (straight line).
In the MCP47X6, INL is calculated using two end points
(zero and full scale). INL can be expressed as a per-
centage of full scale range (FSR) or in a fraction of an
LSb. INL is also called relative accuracy.
shows how to calculate the INL error in LSb and
Figure 7-2
EQUATION 7-4:
FIGURE 7-2:
DS22272A-page 60
Analog
Where:
INL is expressed in LSb.
Output
V
V
(LSb)
Ideal
OUT
6
5
0
7
4
3
2
1
Integral Nonlinearity (INL)
000
shows an example of INL accuracy.
=
=
INL = 0.5 LSb
001
INL
Code*LSb
The output voltage measured with
a given DAC input code
010
=
Actual Transfer Function
Ideal Transfer Function
INL ERROR
INL Accuracy Example.
(
-------------------------------------- -
V
011
DAC Input Code
OUT
INL = - 1 LSb
LSb
100 101
–
V
Ideal
INL = < -1 LSb
)
110
Equation 7-4
111
7.8
The Differential nonlinearity (DNL) error (see
3) is the measure of step size between codes in actual
transfer function. The ideal step size between codes is
1 LSb. A DNL error of zero would imply that every code
is exactly 1 LSb wide. If the DNL error is less than
1 LSb, the DAC guarantees monotonic output and no
missing codes. The DNL error between any two
adjacent codes is calculated as follows:
EQUATION 7-5:
FIGURE 7-3:
Where:
DNL is expressed in LSb.
Δ
Analog
Output
(LSb)
V
OUT
Differential Nonlinearity (DNL)
6
5
0
7
1
4
3
2
000
=
001
Actual Transfer Function
DNL
Ideal Transfer Function
DNL = 2 LSb
The measured DAC output
voltage difference between two
adjacent input codes.
010
DAC Input Code
=
DNL ERROR
DNL Accuracy Example.
© 2011 Microchip Technology Inc.
ΔV
--------------------------------- -
011
OUT
DNL = 0.5 LSb
LSb
100 101
–
LSb
110
Figure 7-
111