DS1868-10+ Maxim Integrated Products, DS1868-10+ Datasheet - Page 6
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DS1868-10+
Manufacturer Part Number
DS1868-10+
Description
IC POT DIGITAL DUAL 10K 14-DIP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1868-10.pdf
(14 pages)
Specifications of DS1868-10+
Taps
256
Resistance (ohms)
10K
Number Of Circuits
2
Temperature Coefficient
750 ppm/°C Typical
Memory Type
Volatile
Interface
3-Wire Serial
Voltage - Supply
2.7 V ~ 3.3 V, 4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
14-DIP (0.300", 7.62mm)
Resistance In Ohms
10K
Number Of Pots
Dual
Taps Per Pot
256
Resistance
10 KOhms
Wiper Memory
Volatile
Digital Interface
Serial (3-Wire)
Operating Supply Voltage
4.5 V to 5.5 V
Supply Current
1 uA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Description/function
Dual Digital Potentiometer Chip
Mounting Style
SMD/SMT
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Tolerance
20 %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
ABSOLUTE AND RELATIVE LINEARITY
Absolute linearity is defined as the difference between the actual measured output voltage and the
expected output voltage. Figure 5 presents the test circuit used to measure absolute linearity. Absolute
linearity is given in terms of a minimum increment or expected output when the wiper is moved one
position. In the case of the test circuit, a minimum increment (MI) or one LSB would equal 5/256 volts.
The equation for absolute linearity is given as follows:
(1)
Relative linearity is a measure of error between two adjacent wiper position points and is given in terms
of MI by equation (2).
(2)
Figure 6 is a plot of absolute linearity and relative linearity versus wiper position for the DS1868 at 25 C.
The specification for absolute linearity of the DS1868 is 0.75 MI typical. The specification for relative
linearity of the DS1868 is 0.3 MI typical.
LINEARITY MEASUREMENT CONFIGURATION Figure 5
ABSOLUTE LINEARITY
RELATIVE LINEARITY
AL={V
RL={V
O
(actual) - V
O
(n+1) - V
6 of 14
O
(expected)}/MI
O
(n)}/MI
DS1868