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Product Detailed Parameters
- Description：IC SCREEN CNTRL 12BIT 16QSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Touchscreen：4 Wire Resistive
- Resolution (Bits)：12 b
- Interface：Serial
- Voltage Reference：External, Internal
- Voltage - Supply：2.2V ~ 5.25V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：16-QSOP
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The AD7873BRQZ-REEL7 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, and a shutdown mode with current consumption below 1 µA. It is housed in a 16-lead QSOP package.
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)
- Single supply operation (2.2 V to 5.25 V) with <1 µA shutdown current
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sale terminals
- Pagers
Procurement Notes
Verify the specific suffix 'BRQZ-REEL7' against the manufacturer's ordering guide to confirm the package type (QSOP), temperature range, and reel packaging quantity. Ensure compatibility with existing PCB footprints for the 16-lead QSOP form factor before procurement.
Selection Notes
Select this component for battery-powered systems requiring low power consumption and integrated touch screen driving capabilities. Consider the internal 2.5 V reference or external reference options based on system accuracy requirements. Verify that the serial interface timing meets the host controller's clock speed constraints.
Part Context
This part belongs to the AD7873 family of touch screen controllers. The BRQZ suffix indicates the commercial temperature grade (-40°C to +85°C) and the QSOP package style. The REEL7 suffix denotes tape and reel packaging for automated assembly.
Replacement Considerations
Direct pin-compatible replacements within the same family include AD7873ARUZ and AD7873BRQZ. Verify package dimensions and thermal characteristics when substituting between QSOP, TSSOP, and LFCSP variants.
