Description
X9421WS16-2.7 Intersil Digital Potentiometer 10k Ohm 1 Circuit 64 Taps SPI Interface 16-SOIC
Key Features
Single Voltage Potentiometer
64 Resistor Taps
SPI Serial Interface for Write, Read, and Transfer Operations of the Potentiometer
Wiper Resistance, 150? Typical at 5V
4 Non-Volatile Data Registers
Non-Volatile Storage of Multiple Wiper Positions
Power-on Recall. Loads Saved Wiper Position on Power-up.
Standby Current < 5µA Max
VCC: 2.7V to 5.5V Operation
2.5k?, 10k? End to End Resistance
100 yr. Data Retention
Endurance: 100, 000 Data Changes per Bit per Register
14 Ld TSSOP, 16 Ld SOIC
Low Power CMOS
Pb-Free Available (RoHS Compliant)
Description
The X9421 integrates a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit.
The digital controlled potentiometer is implemented using 63 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 a four non-volatile Data Registers that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. Power-up recalls the contents of the default data register (DR0) to the WCR.
The XDCP can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
Applications
CIRCUIT LEVEL APPLICATIONS
Vary the gain of a voltage amplifier
Provide programmable dc reference voltages for comparators and detectors
Control the volume in audio circuits
Trim out the offset voltage error in a voltage amplifier circuit
Set the output voltage of a voltage regulator
Trim the resistance in Wheatstone bridge circuits
Control the gain, characteristic frequency and Q-factor in filter circuits
Set the scale factor and zero point in sensor signal conditioning circuits
Vary the frequency and duty cycle of timer ICs
Vary the dc biasing of a pin diode attenuator in RF circuits
Provide a control variable (I, V, or R) in feedback circuits
SYSTEM LEVEL APPLICATIONS
Adjust the contrast in LCD displays
Control the power level of LED transmitters in communication systems
Set and regulate the DC biasing point in an RF power amplifier in wireless systems
Control the gain in audio and home entertainment systems
Provide the variable DC bias for tuners in RF wireless systems
Set the operating points in temperature control systems
Control the operating point for sensors in industrial systems
Trim offset and gain errors in artificial intelligent systems
Manufacturer:Intersil
Datasheet:Intersil/x9421.pdf
