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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-REEL 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. It features a synchronous serial interface and programmable resolution of 8 or 12 bits. The component is housed in a 16-lead QSOP package and functions within an operating temperature range of -40°C to +85°C.
Feature Summary
- 12-bit SAR ADC with 125 kSPS throughput rate
- Integrated 2.5 V reference and on-chip temperature sensor (-40°C to +85°C)
- Direct battery measurement capability (0 V to 6 V input)
- Low power shutdown mode with current consumption less than 1 µA
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sale terminals
- Pagers
Procurement Notes
Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing this part number. Confirm that the BRQZ designation corresponds to the commercial temperature grade and QSOP package variant as specified in the manufacturer's ordering guide. Ensure compatibility with existing serial interface logic levels.
Selection Notes
Select this component for systems requiring integrated touch screen driving switches and low power consumption. The internal 2.5 V reference simplifies design by eliminating external reference requirements. Consider the 125 kSPS speed limit and 12-bit resolution constraints for high-speed or high-precision applications. Verify that the QSOP package fits the available PCB footprint.
Part Context
This part belongs to the AD7873 family of touch screen controllers. The BRQZ suffix denotes the commercial temperature range and QSOP package. The REEL suffix specifies the reel packaging format for automated assembly. Other variants include TSSOP and LFCSP packages with different suffixes.
Replacement Considerations
Check for direct pin-compatible alternatives within the AD7873 family, such as AD7873ARUZ or AD7873CPZ, ensuring package and temperature grade match. Verify electrical specifications against any cross-model substitutes to ensure functional equivalence.
