Overview
Description
The X9111 integrates a single, digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 1023 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the SPI bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers that can be directly written to and read by the user. The contents of the WCR control the position of the wiper on the resistor array through the switches. Power-up recalls the contents of the default data register (DR0) to the WCR. The XDCP can be used as a 3-terminal potentiometer or as a 2-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
Features
- 1024 resistor taps – 10-bit resolution
- SPI serial interface for write, read, and transfer operations of the potentiometer
- Wiper resistance, 40Ω typical at 5V
- Four nonvolatile Data Registers
- Nonvolatile storage of multiple wiper positions
- Power-on recall, loads saved wiper position on power-up
- Standby current <3μA maximum
- VCC: 2.7V to 5.5V operation
- 100kΩ end-to-end resistance
- 100-year data retention
- Endurance: 100,000 data changes per bit per register
- 14 Ld TSSOP
- Low-power CMOS
- Single supply version of the X9110
- Pb-Free (RoHS compliant)
Comparison
Applications
Design & Development
Software & Tools
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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