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Product Detailed Parameters
- Description：IC ADC 12BIT TOUCHSCREEN 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- 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-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 a maximum throughput rate of 125 kSPS. The device integrates an on-chip 2.5 V reference, a temperature sensor, and low-resistance switches for direct battery measurement and touch pressure sensing. It features a synchronous serial interface and is available in a 16-lead TSSOP package.
Feature Summary
- 12-bit resolution with a specified throughput rate of 125 kSPS
- Integrated 2.5 V internal reference and on-chip temperature sensor (-40°C to +85°C)
- Direct battery measurement capability (0 V to 6 V input range)
- Low power consumption: 1 µA maximum in shutdown mode
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sale terminals
- Pagers
Procurement Notes
Verify the specific suffix 'REEL7' corresponds to the tape-and-reel packaging format required for automated assembly. Confirm that the 'ARU' designation matches the 16-lead TSSOP package variant needed for the target PCB footprint. Ensure compatibility with the -40°C to +85°C commercial operating temperature range.
Selection Notes
Select this component when a single-chip solution for resistive touch screens is required, eliminating the need for external multiplexers or references. Consider the 125 kSPS speed limit and 12-bit accuracy against system latency requirements. Verify that the 2.2 V minimum supply voltage aligns with the system's battery management strategy.
Part Context
This part belongs to the AD7873 family of touch screen controllers. The 'ARU' indicates the 16-lead Thin Shrink Small Outline Package (TSSOP). The 'REEL7' suffix specifies the reel packaging configuration used for high-volume surface-mount manufacturing processes.
Replacement Considerations
Consult the manufacturer's official cross-reference documentation for verified alternative part numbers. Ensure any substitute maintains the 16-lead TSSOP form factor and 12-bit ADC functionality.
