CAT5122SDI10GT3 ON Semiconductor, CAT5122SDI10GT3 Datasheet - Page 5

• Manufacturer Part Number: CAT5122SDI10GT3
• Description: Digital Potentiometer ICs DPP MiniPot 16 taps Up/Down
• Manufacturer: ON Semiconductor

Specifications of CAT5122SDI10GT3

• Number Of Pots: Single
• Taps Per Pot: 16
• Resistance: 10 KOhms
• Wiper Memory: Volatile
• Buffered Wiper: Non Buffered
• Digital Interface: Serial (2-Wire)
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 25 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Description/function: 16-Tap MiniPot Digitally Programmable Potentiometers with 2-Wire Interface
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Package / Case: SC-70-5
• Temperature Coefficient: 200 PPM / C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Description
wiper contact with 16−tap points that are digitally controlled
through a 2−wire up/down serial interface. Three end−to−
end resistance values are available: 10 kW, 50 kW and
100 kW.
In this configuration, the low terminal of the resistor array
is connected to ground (pin 2).
device, the wiper terminal and high terminal of the resistor
array is connected at pin 5. The CAT5121 is a similar
variable resistor, except the low terminal is connected to
pin 5.
Digital Interface Operation
serial interface is active: increment and decrement mode.
The serial interface is only active when CS is low.
The CAT5120/5121/5122 consist of a fixed resistor and a
The CAT5120 is designed to operate as a potentiometer.
The CAT5122 performs as a variable resistor. In this
The MiniPots have two modes of operation when the
W
Note: “W” is not a digital signal. It represents wiper transitions.
CS
U/D
CS
U/D
W
Note: “W” is not a digital signal. It represents wiper transitions.
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Figure 8. Serial Interface Timing Diagram, Decrement Mode
Figure 7. Serial Interface Timing Diagram, Increment Mode
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along the resistor array. When CS transitions from high to
low, the part will go into increment mode if U/D input is
high, and into decrement mode when U/D input is low. Once
the mode is set, the device will remain in that mode until CS
goes high again. A low−to−high transition at the U/D pin
will increment or decrement the wiper position depending
on the current mode (Figures 7 and 8).
inactive), the value of the counter is stored and the wiper
position is maintained.
minimum) tap position, the wiper will not wrap around to the
minimum (or maximum) position.
Power−On Reset
circuitry that sets the wiper position to midscale at
power−up. By default, the chip is in the increment mode.
The CS and U/D inputs control the position of the wiper
When the CS input transitions to high (serial interface
Note that when the wiper reaches the maximum (or
All parts in this family feature power−on reset (POR)
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