DS1867S-10+ Maxim Integrated Products, DS1867S-10+ Datasheet - Page 7

• Manufacturer Part Number: DS1867S-10+
• Description: IC POT W/EEPROM DUAL 10K 16-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS1867S-10+

• Taps: 256
• Resistance (ohms): 10K
• Number Of Circuits: 2
• Temperature Coefficient: 750 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: 3-Wire Serial
• Voltage - Supply: 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: Single
• Taps Per Pot: 64
• Resistance: 10 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (3-Wire)
• Operating Supply Voltage: 4.5 V to 5.5 V
• Supply Current: 250 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Description/function: Dual Digital Potentiometer with EEPROM
• 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

DS1867
POWER-DOWN EEPROM TIMING REQUIREMENTS Figure 6
TYPICAL APPLICATION CONFIGURATIONS
Figures 7 and 8 show two typical application configurations for the DS1867. 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 an inverting variable gain amplifier. The gain of the circuit on Figure 7 is given by
the following equation:
Av = -n/(255-n); where n = 0 to 255
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.
INVERTING VARIABLE GAIN AMPLIFIER Figure 7
DS1867
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