DS1868S-10+ Maxim Integrated Products, DS1868S-10+ Datasheet - Page 7
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DS1868S-10+
Manufacturer Part Number
DS1868S-10+
Description
IC POT DIGITAL DUAL 10K 16-SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1868-10.pdf
(14 pages)
Specifications of DS1868S-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
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
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
DS1868
DS1868 ABSOLUTE AND RELATIVE LINEARITY Figure 6
TYPICAL APPLICATION CONFIGURATIONS
Figures 7 and 8 show two typical application configurations for the DS1868. By connecting the wiper
terminal of the part to a high impedance load, the effects of the wiper resistance is minimized, since the
wiper resistance can vary from 400 to 1000 ohms, depending on wiper voltage. Figure 7 presents the
device connected in a variable gain amplifier. The gain of the circuit on Figure 7 is given by the following
equation:
256
A
=
where n = 0 to 255
V
256
n -
Figure 8 shows the device operating in a fixed gain attenuator where the potentiometer is used to
attenuate an incoming signal. Note the resistance R1 is chosen to be much greater than the wiper
resistance to minimize its effect on circuit gain.
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