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AD7843 Datasheet PDF

Part Series:AD7843 Series
Description:Touch Screen Digitizer
Document:AD7843ARUZ Datasheet PDF (22 Pages)

AD7843 Datasheet PDF

22 Pages
ADI
Single ADC SAR 125KSPS 12Bit Serial 16Pin QSOP T/R
21 Pages
ADI
Dual Channel Single ADC SAR 125KSPS 12Bit Serial 16Pin QSOP
21 Pages
ADI
Dual Channel Single ADC SAR 125KSPS 12Bit Serial 16Pin TSSOP
21 Pages
ADI
Dual Channel Single ADC SAR 125KSPS 12Bit Serial 16Pin QSOP T/R
21 Pages
ADI
Dual Channel Single ADC SAR 125KSPS 12Bit Serial 16Pin QSOP
21 Pages
ADI
IC ADC 12Bit TOUCHSCREEN 16TSSOP
21 Pages
ADI
IC ADC 12Bit TOUCHSCREEN 16TSSOP
20 Pages
ADI
Touch Screen Digitizer

AD7843 - ADI Function Overview

Product Details
The AD7843 is a 12-bit successive-approximation ADC with a synchronous serial interface and low on resistance switches for driving touch screens. The part operates from a single 2.2 V to 5.25 V power supply and features throughput rates greater than 125 kSPS. The external reference applied to the AD7843 can be varied from 1 V to +VCC, while the analog input range is from 0 V to VREF. The device includes a shutdown mode that reduces the current consumption to less than 1 µA. This part is available in a 16-lead 0.15" Quarter Size Outline (QSOP) package and a 16-lead Thin Shrink Small Outline (TSSOP) package. 
Also see the AD7843 sister part, which is the AD7873. This part is similar to the AD7843 but has added functionality such as an on-chip temperature sensor (-40°C to + 85°C), on-chip 2.5 V reference and direct battery and touch-pressure measurement.
### Features and Benefits
4-wire touch screen interface
Specified throughput rate of 125 kSPS
Low power consumption:
1.37 mW max at 125 kSPS with VCC = 3.6 V
Single supply, VCC of 2.2 V to 5.25 V
Ratiometric conversion
High speed serial interface
Programmable 8-bit or 12-bit resolution
2 auxiliary analog inputs
Shutdown mode: 1 µA max
16-lead QSOP and TSSOP packages
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