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Products Mentioned

AD7142 Production
The AD7142 and AD7142-1 are integrated capacitance-to-digital converters (CDCs) with on-chip environmental calibration for use in systems requiring a novel...
Datasheet
AD7142 on Analog.com

Table of Contents
  • DATA CONVERTERS SUPPORT COMMUNITY
  • +Documents (More FAQs in Sub-Groups)
  • +AD7730: FAQ
  • +AD7746: FAQ
  • +ADC: FAQ
  • +AD1871: FAQ
  • +AD1877: FAQ
  • +AD1974: FAQ
  • +AD2S1200: FAQ
  • +AD2S1205: FAQ
  • +AD2S1210: FAQ
  • +AD2S80A: FAQ
  • +AD2S83: FAQ
  • +AD2S90: FAQ
  • +AD4080: FAQ
  • +AD4081: FAQ
  • +AD4083: FAQ
  • +AD4084: FAQ
  • +AD4086: FAQ
  • +AD4087: FAQ
  • +AD4880: FAQ
  • +AD4883: FAQ
  • +AD4884: FAQ
  • +AD5111: FAQ
  • +AD5112: FAQ
  • +AD5115: FAQ
  • +AD5116: FAQ
  • +AD5121: FAQ
  • +AD5141: FAQ
  • +AD5141BCPZ100-RL7: FAQ
  • +AD5142: FAQ
  • +AD5160: FAQ
  • +AD5161: FAQ
  • +AD5203: FAQ
  • +AD5206: FAQ
  • +AD5222: FAQ
  • +AD5232: FAQ
  • +AD5235: FAQ
  • +AD5243: FAQ
  • +AD5245: FAQ
  • +AD5248: FAQ
  • +AD5251: FAQ
  • +AD5252: FAQ
  • +AD5254: FAQ
  • +AD5258: FAQ
  • +AD5259: FAQ
  • +AD5263: FAQ
  • +AD5270: FAQ
  • +AD5271: FAQ
  • +AD5272: FAQ
  • +AD5282: FAQ
  • +AD5290: FAQ
  • AD5292: FAQ
  • +AD5293: FAQ
  • +AD5593R: FAQ
  • +AD650: FAQ
  • +AD652: FAQ
  • +AD652SE: FAQ
  • +AD654: FAQ
  • -AD7142: FAQ
    • AD7142: Signature capture
    • AD714x: maximum glass thickness that can cover a PCB for Captouch using AD7142/3 or AD7147/8
  • +AD7147: FAQ
  • +AD7148: FAQ
  • +AD7150: FAQ
  • +AD7151: FAQ
  • +AD7293: FAQ
  • +AD7400A: FAQ
  • +AD7401: FAQ
  • +AD7403: FAQ
  • +AD74115H: FAQ
  • +AD7415: FAQ
  • +AD7416: FAQ
  • +AD7417: FAQ
  • +AD7418: FAQ
  • +AD74416H - FAQ
  • +AD7740: FAQ
  • +AD7741: FAQ
  • +AD7745: FAQ
  • +AD7747: FAQ
  • +AD7879: FAQ
  • +AD8152: FAQ
  • +AD8156: FAQ
  • +AD8158: FAQ
  • +AD8159: FAQ
  • AD8400: FAQ
  • +AD8403: FAQ
  • +ADAQ4001: FAQ
  • +ADE7912: FAQ
  • +ADE7913: FAQ
  • +ADG3247: FAQ
  • +ADG3248: FAQ
  • +ADG3300: FAQ
  • +ADG3304: FAQ
  • +ADG3308: FAQ
  • +ADN4600: FAQ
  • +ADN4604: FAQ
  • +ADT7310: FAQ
  • +ADT7320: FAQ
  • +ADT7410: FAQ
  • +ADT7470: FAQ
  • +ADVFC32: FAQ
  • +DS1624: FAQ
  • +DS1629S+: FAQ
  • +DS1882: FAQ
  • +DS1882E-050+: FAQ
  • +DS3501U+: FAQ
  • +DS3502U+: FAQ
  • +DS3902U-515+: FAQ
  • +DS3930: FAQ
  • +DS75LVS+: FAQ
  • +HMC661: FAQ
  • +HMC953LC4B: FAQ
  • +MAX13003EEUE+: FAQ
  • +MAX13035EEBE+: FAQ
  • +MAX13035EETE+: FAQ
  • +MAX14001: FAQ
  • +MAX14001AAP+: FAQ
  • +MAX14591ETA+: FAQ
  • +MAX14595: FAQ
  • +MAX14611: FAQ
  • +MAX1617: FAQ
  • +MAX1617AMEE_T1: FAQ
  • +MAX1619: FAQ
  • +MAX1619MEE+: FAQ
  • +MAX1668MEE+: FAQ
  • +MAX2084CXL+: FAQ
  • +MAX22531: FAQ
  • +MAX3002: FAQ
  • +MAX3012EUP+: FAQ
  • +MAX3023EUD+: FAQ
  • +MAX31722MUA+: FAQ
  • +MAX31723MUA+: FAQ
  • +MAX31725MTA+T: FAQ
  • +MAX31730: FAQ
  • +MAX31855EASA+: FAQ
  • MAX31855KASA+: FAQ
  • +MAX31855KASA+T: FAQ
  • +MAX31855PMB1#: FAQ
  • +MAX31856: FAQ
  • +MAX31856EVSYS#: FAQ
  • MAX31856MUD+: FAQ
  • +MAX31856MUD+T: FAQ
  • +MAX31865 RTD-DIGIT: FAQ
  • +MAX31865: FAQ
  • +MAX31865AAP+: FAQ
  • MAX31865ATP+: FAQ
  • +MAX31865ATP+T: FAQ
  • +MAX31865EVKIT#: FAQ
  • +MAX31875A/D+: FAQ
  • +MAX31875R1TZS+: FAQ
  • +MAX3373EEBL+: FAQ
  • +MAX3378EEUD+: FAQ
  • +MAX3390E: FAQ
  • +MAX3397EELA+: FAQ
  • +MAX5417LETA+: FAQ
  • +MAX5422: FAQ
  • +MAX5433LETA+: FAQ
  • +MAX5479ETE+: FAQ
  • +MAX5481: FAQ
  • +MAX5483ETE+: FAQ
  • +MAX5483EUD: FAQ
  • +MAX5484ETE+: FAQ
  • +MAX5484EUD+: FAQ
  • +MAX5487ETE+: FAQ
  • +MAX5494: FAQ
  • +MAX5860: FAQ
  • +MAX6575LZUT+: FAQ
  • +MAX6581_TG98+_A1: FAQ
  • +MAX6618AUB+: FAQ
  • +MAX6621: FAQ
  • +MAX6625PMUT-T: FAQ
  • +MAX6626PMUT#G16: FAQ
  • +MAX6627MKA#G16: FAQ
  • +MAX6630MUT: FAQ
  • +MAX6633MSA+: FAQ
  • +MAX6635EVKIT+: FAQ
  • +MAX6652AUB+: FAQ
  • +MAX6655: FAQ
  • +MAX6682MUA+: FAQ
  • +MAX6689: FAQ
  • +MAX6691MUB+: FAQ
  • +MAX6696AEE+T: FAQ
  • +MAX6698EE99+: FAQ
  • +MAX7500ASA/V+: FAQ
  • +MAX9110EKA+: FAQ
  • +MAX9112EKA+T: FAQ
  • +MAX9123ESE_T1: FAQ
  • +MAX9123EUE+: FAQ
  • +MAX9130EXT+: FAQ
  • MAX9205: FAQ
  • +MAX9206ETI+: FAQ
  • +MAX9217: FAQ
  • +MAX9257A: FAQ
  • +MAX9258AGCM/V+: FAQ
  • +MAX9310AEUP+: FAQ
  • +MAX9315: FAQ
  • +MAX9370ESA+: FAQ
  • +MAX9377EUA+: FAQ
  • +MAX9378: FAQ
  • MAX96715: FAQ
  • +MAX96715GTG/V+: FAQ
  • +MAX96717FGTJ/V+: FAQ
  • +MAX96717_TJ/VY+_A1: FAQ
  • +RDC1740: FAQ
  • +AD5292BRUZ-50: FAQ
  • +AD9834: FAQ

AD7142: Signature capture

Question

Is it possible for the AD7142 to be used with a touch glass ?

Is it possible to use the AD7142 for signature capture ?

Answer

The AD7142 can function through a certain thickness of glass (a few mm).

I assume that for signature capture, it is necessary to measure a 2d position
repeatedly to obtain an image of the pen trajectory. In this case the AD7142's
suitability would depend on obtaining sufficient resolution in the 2d space and
sufficient sample rate.

Tags: ad7142 data converters Integrated/Special Purpose A/D Converters Capacitive-to-Digital and Touch Screen Controllers 5E1N1620
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