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X9438WP24I-2.7 Datasheet(PDF) 1 Page - Intersil Corporation |
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X9438WP24I-2.7 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 18 page 1 ® FN8199.0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc. XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. PRELIMINARY X9438 Programmable Analog Dual Digitally Controlled Potentiometer (XDCP™) with Operational Amplifier FEATURES • Two CMOS voltage operational amplifiers • Two digitally controlled potentiometers • Can be combined or used separately •Amplifiers: —Low voltage operation —V+/V- = ±2.7V to ±5.5V —Rail-to-rail CMOS performance —1MHz gain bandwidth product • Digitally controlled potentiometers —Dual 64 tap potentiometers —Rtotal = 10kΩ —2-wire serial interface —VCC = 2.7V to 5.5V DESCRIPTION The X9438 is a monolithic CMOS IC that incorporates two operational amplifiers and two nonvolatile digitally controlled potentiometers. The amplifiers are CMOS differential input voltage operational amplifiers with near rail-to-rail outputs. All pins for the two amplifiers are brought out of the package to allow combining them with the potentiometers, or using them as com- plete stand-alone amplifiers. The digitally controlled potentiometers consist of a series string of 63 polycrystalline resistors that behave as standard integrated circuit resistors. The two-wire serial port, common to both pots, allows the user to program the connection of the wiper output to any of the resistor nodes in the series string. The wiper posi- tion is saved in the on board E2 memory to allow for nonvolatile restoration of the wiper position. A wide variety of applications can be implemented using the potentiometers and the amplifiers. A typical application is to implement the amplifier as a wiper buffer in circuits that use the potentiometer as a voltage reference. The potentiometer can also be combined with the amplifier yielding a digitally programmable gain amplifier or programmable current source. BLOCK DIAGRAM VOUT1 Control and SCL SDA A3 A2 A1 A0 + – Memory WP VCC VNI0 V+ V- RW0 VSS VOUT0 + – VNI1 VINV1 VINV0 RH0 RL0 RW1 RL1 RH1 WCR1 WCR0 Data Sheet March 11, 2005 NOT R ECOM MEND ED FO R NEW DESIG NS NO RE COMM ENDED REPLA CEMEN T contac t our T echnic al Sup port C enter a t 1-888-I NTERS IL or w ww.int ersil.com /tsc |
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