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Product Detailed Parameters
- Description：IC SCREEN CNTRL 12BIT 16QSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube,Tube
- 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 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 low on-resistance switches, an on-chip 2.5 V reference, and a temperature sensor. Key features include direct battery measurement (0 V to 6 V), touch pressure sensing, and a programmable serial interface. It is housed in a 16-lead QSOP package with an operating temperature range of −40°C to +85°C.
Feature Summary
- 12-bit resolution with 125 kSPS throughput rate
- Integrated 2.5 V reference and temperature sensor (−40°C to +85°C)
- Direct battery monitor input supporting 0 V to 6 V range
- 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 BRQZ against the manufacturer's ordering guide to confirm the QSOP package type and industrial temperature grade. Confirm availability status as distribution channels may list this component as discontinued or limited stock. Ensure the source document matches the Rev F datasheet specifications for accuracy.
Selection Notes
Select the AD7873BRQZ when a 12-bit ADC with integrated touch screen drivers and battery monitoring is required. Compare against the AD7873ARQZ if a TSSOP package is preferred instead of QSOP. Consider the AD7877 if an internal DAC is needed for additional functionality beyond standard resistive touch control.
Part Context
The AD7873 belongs to the Analog Devices AD7873 family of touch screen controllers. It shares core architecture with the AD7843 but adds on-chip temperature sensing and battery monitoring capabilities. The BRQZ designation specifically identifies the industrial temperature variant packaged in a 16-lead Quarter Size Outline Package (QSOP).
Replacement Considerations
The AD7873ARQZ serves as a pin-compatible alternative offering the same electrical performance in a 16-lead TSSOP package. Verify that the target PCB footprint accommodates the specific outline dimensions of the QSOP package before substituting.
