| Customization: | Available |
|---|---|
| Conductive Type: | Unipolar Integrated Circuit |
| Integration: | LSI |
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XPT2046: DRIVER IC
Package: TSSOP-16
Mfr. Part#: XPT2046
Mfr.: XPT
Datasheet: 
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ROHS Status:
Quality: 100% Original
Warranty: 180 days
The XPT2046 is a classic successive approximation register (SAR) analog-to-digital converter (ADC). The architecture is based on capacitive redistribution, which inherently includes a sample-and-hold function. The converter is fabricated on a 0.6μm CMOS process. The basic operation of the XPT2046 is shown in Figure 4 The device features an internal 2.5V reference and uses an external clock. Operation is maintained from a single supply of 2.7V to 5.25V. The internal reference can be overdriven with an external, low-impedance source between 1V and +VCC. The value of the reference voltage directly sets the input range of the converter. The analog input (X-, Y-, and Z-Position coordinates, auxiliary input, battery voltage, and chip temperature) to the converter is provided via a multiplexer. A unique configuration of low on-resistance touch panel driver switches allows an unselected ADC input channel to provide power and the accompanying pin to provide ground for an external device, such as a touch screen. By maintaining a differential input to the converter and a differential reference architecture, it is possible to negate the error from each touch panel driver switch's on-resistance (if this is a source of error for theparticular measurement).
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