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ISL23418WFRUZ-T7A датащи(PDF) 1 Page - Intersil Corporation |
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ISL23418WFRUZ-T7A датащи(HTML) 1 Page - Intersil Corporation |
1 / 20 page 1 Single, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™) ISL23418 The ISL23418 is a volatile, low voltage, low noise, low power, SPI™ bus, 128 taps, single digitally controlled potentiometer (DCP), which integrates DCP core, wiper switches, and control logic on a monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented with a combination of resistor elements and CMOS switches. The position of the wiper is controlled by the user through the SPI bus interface. The potentiometer has an associated volatile Wiper Register (WR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. When powered on, the ISL23418 wiper always commences at mid-scale (64-tap position). The low voltage, low power consumption, and small package size of the ISL23418 make it an ideal choice for use in battery operated equipment. The ISL23418 has a VLOGIC pin allowing down to 1.2V bus operation, independent from the VCC value. This allows for low logic levels to be connected directly to the ISL23418 without passing through a voltage level shifter. The DCP 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. Related Literature •See ISL23415, “Single, Low Voltage Digitally Controlled Potentiometer (XDCP™)” Features • 128 Resistor Taps • SPI Serial Interface - No Additional Level Translator for Low Bus Supply - Daisy Chaining of Multiple DCP • Wiper Resistance: 70 Ω Typical @ VCC = 3.3V • Shutdown Mode: Forces DCP into End-to-end Open Circuit; RW Shorted to RL Internally • Power-on Preset to Mid-scale (64-tap Position) • Shutdown and Standby Current <2.8µA Max • Power Supply -VCC = 1.7V to 5.5V Analog Power Supply -VLOGIC = 1.2V to 5.5V SPI Bus/Logic Power Supply • DCP Terminal Voltage from 0V to VCC •10k Ω, 50kΩ or 100kΩ Total Resistance • Extended Industrial Temperature Range: -40°C to +125°C • 10 Ld MSOP or 10 Ld µTQFN Packages • Pb-free (RoHS compliant) Applications • Power Supply Margining • RF Power Amplifier Bias Compensation • LCD Bias Compensation • Gain Adjustment in Battery Powered Instruments • Portable Medical Equipment Calibration FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP POSITION, 10k FIGURE 2. VREF ADJUSTMENT 0 2000 4000 6000 8000 10000 0 25 50 75 100 125 TAP POSITION (DECIMAL) VREF_M ISL28114 ISL23418 + - VREF RL1 RW1 RH1 August 3, 2011 FN7901.0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved XDCP is a trademark of Intersil Americas Inc. Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries .All other trademarks mentioned are the property of their respective owners. |
Аналогичный номер детали - ISL23418WFRUZ-T7A |
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Аналогичное описание - ISL23418WFRUZ-T7A |
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