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Product Detailed Parameters
- Description：IC ADC 12BIT TOUCHSCREEN 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Touchscreen：-
- Resolution (Bits)：12 b
- Interface：-
- Voltage Reference：External, Internal
- Voltage - Supply：2.2V ~ 5.25V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-TSSOP
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The AD7873ARU is a 12-bit successive approximation analog-to-digital converter (ADC) designed for resistive touch screen digitizer applications. It operates from a single 2.2 V to 5.25 V supply and supports throughput rates up to 125 kSPS. The device integrates on-chip switches, a 2.5 V reference, and a temperature sensor. Key specifications include a serial interface, programmable resolution, direct battery measurement capability, and a shutdown mode with current consumption below 1 µA.
Feature Summary
- 12-bit SAR ADC with 125 kSPS throughput rate
- Integrated 4-wire touch screen interface with low on-resistance switches
- On-chip 2.5 V reference and temperature sensor (-40°C to +85°C)
- Direct battery monitor input supporting 0 V to 6 V range
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sale terminals
Procurement Notes
Verify the package type upon ordering, as the base model number covers multiple packages including TSSOP-16 and QSOP-16. Confirm RoHS compliance status and specific revision level against the manufacturer's latest documentation to ensure compatibility with current manufacturing standards.
Selection Notes
Select this component for battery-powered systems requiring low power consumption and integrated touch screen driving capabilities. Ensure the system voltage falls within the 2.2 V to 5.25 V range. Consider the internal 2.5 V reference or external reference options based on required accuracy and noise performance.
Part Context
The AD7873 belongs to the Analog Devices AD7873 series of touch screen controllers. It shares functional similarities with the AD7843 but adds integrated features such as the on-chip temperature sensor and direct battery measurement. The device is part of the broader data converter ICs category under Analog Devices' instrumentation solutions portfolio.
Replacement Considerations
The AD7843 is a related part in the same family but lacks the integrated temperature sensor and direct battery measurement features found in the AD7873. Verify pinout compatibility if substituting, as both utilize 16-lead packages.
