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Product Detailed Parameters
- Description：IC SCREEN CNTRL 12BIT 16LFCSP
- 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-VQFN Exposed Pad, CSP
- Supplier Device Package：16-LFCSP-VQ (4x4)
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The AD7873ACPZ-REEL7 is a 12-bit successive approximation analog-to-digital converter (ADC) designed for resistive touch screen digitizer applications. It integrates low on-resistance switches, an internal 2.5 V reference, and a temperature sensor. Operating from a single 2.2 V to 5.25 V supply, it achieves throughput rates up to 125 kSPS with a synchronous serial interface. The device supports programmable 8-bit or 12-bit resolution and includes features such as direct battery measurement (0 V to 6 V), touch pressure measurement, and an auxiliary analog input. Shutdown mode reduces current consumption to less than 1 µA.
Feature Summary
- 12-bit resolution 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 package type matches the 'ACPZ' suffix, which indicates a Lead Frame Chip Scale Package (LFCSP). Confirm the reel quantity and ensure the component meets RoHS standards. Check for availability constraints as distribution status may vary by region.
Selection Notes
Select this part for battery-powered systems requiring space-saving integration of ADC and touch screen drivers. Ensure the application voltage stays within 2.2 V to 5.25 V. Consider the LFCSP thermal characteristics if high ambient temperatures are expected.
Part Context
This component belongs to the AD7873 series of touch screen controllers. It shares functional similarities with the AD7843 but offers integrated touch screen driving capabilities. The ACPZ variant specifically denotes the 16-lead LFCSP package option.
Replacement Considerations
The AD7873ARQZ and AD7873BRQZ are alternative package versions of the same functional device. Verify pin compatibility when substituting between TSSOP/QSOP and LFCSP packages.
