CAT5121: Digital Potentiometer (POT), 16-Tap, with 2-Wire Interface
CAT5121 linear-taper digital POT performs the same function as a mechanical potentiometer or a variable resistor. This device consists of a fixed resistor and a wiper contact with 32-tap points that are digitally controlled through a 2-wire up/down serial interface.The CAT5121 is configured as a variable resistor. See Pin Configurations for part functionality. Three resistance values are available: 10 kΩ , 50 kΩ and 100 kΩ.
Features- 0.3 µA Ultra-low supply current
- Single-supply operation: 2.7 V to 5.5 V
- Glitchless switching between resistor taps
- Power-on reset to midscale
- 2-Wire up/down serial interface
- Resistance values: 10 kΩ, 50 kΩ and 100 kΩ
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Applications- LCD screen adjustment
- Volume control
- Mechanical potentiometer replacement
- Gain adjustment
- Line impedance matching
| End Products |
Data Sheets (1)
Package Drawings (2)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| CAT5121SDI-10GT3 | Active | Pb-free
Halide free | SC-88-6 / SC-70-6 | 419AD | 1 | Tape and Reel | 3000 | $1.16 |
| CAT5121SDI-50GT3 | Active | Pb-free
Halide free | SC-88-6 / SC-70-6 | 419AD | 1 | Tape and Reel | 3000 | $1.16 |
| CAT5121TBI-10GT3 | Active | Pb-free
Halide free | SOT-23-6 | 527AJ | 1 | Tape and Reel | 3000 | $1.1466 |
| CAT5121TBI-50GT3 | Active | Pb-free
Halide free | SOT-23-6 | 527AJ | 1 | Tape and Reel | 3000 | $1.1466 |
Specifications
| Product | # of Pots | # of Taps | Type | Control Interface | Resistance Typ (kΩ) | VH Max (V) | Wiper Position Memory | VDD Max (V) |
|---|
| CAT5121SDI-10GT3 | 1 | 16 | Rheostat | Up/Down | 10 | VCC | No | 5.5 |
| CAT5121SDI-50GT3 | 1 | 16 | Rheostat | Up/Down | 50 | VCC | No | 5.5 |
| CAT5121TBI-10GT3 | 1 | 16 | Rheostat | Up/Down | 10 | VCC | No | 5.5 |
| CAT5121TBI-50GT3 | 1 | 16 | Rheostat | Up/Down | 50 | VCC | No | 5.5 |
