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X9259TB24-2.7 Datasheet(PDF) 2 Page - Xicor Inc. |
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X9259TB24-2.7 Datasheet(HTML) 2 Page - Xicor Inc. |
2 / 25 page X9259 Characteristics subject to change without notice. 2 of 25 REV 1.2.3 4/30/02 www.xicor.com DETAILED FUNCTIONAL DIAGRAM INTERFACE AND CONTROL CIRCUITRY A0 SCL SDA A1 A2 WP A3 Wiper Counter Register (WCR) Resistor Array Pot 1 RH1 RL1 Wiper Counter Register (WCR) RH0 RL0 Data 8 RW0 Resistor Array RH2 RL2 RW2 Resistor Array RH3 RL3 RW3 Wiper Counter Register (WCR) Wiper Counter Register (WCR) Pot 3 Pot 2 Pot 0 VCC VSS 256-taps 50K Ω and 100KΩ Power On Recall Power On Recall Power On Recall Power On Recall DR0 DR1 DR2 DR3 DR0 DR1 DR2 DR3 DR0 DR1 DR2 DR3 DR0 DR1 DR2 DR3 RW1 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 |
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