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Product Detailed Parameters
- Description：IC ADC 12BIT TOUCHSCREEN 16LFCSP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bag
- 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-VQFN Exposed Pad, CSP
- Supplier Device Package：16-LFCSP-VQ (4x4)
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The AD7873BCP 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 exceeding 125 kSPS with a synchronous serial interface. The device supports programmable 8-bit or 12-bit resolution and includes shutdown mode reducing current consumption to less than 1 µA. It is housed in a 16-lead QSOP package.
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 specific suffix 'BCP' against the manufacturer's official ordering guide to confirm package type and grade. Datasheet documentation primarily references QSOP, TSSOP, and LFCSP packages; ensure the requested package variant matches available manufacturing specifications before procurement.
Selection Notes
Select this component for battery-powered systems requiring low power consumption and high-speed touch position sensing. Ensure the system voltage falls within the 2.2 V to 5.25 V range. Consider the 125 kSPS maximum sample rate and serial interface timing requirements when designing the host microcontroller connection.
Part Context
The AD7873 belongs to the Analog Devices AD7873 family of touch screen controllers. This series combines ADC functionality with switch drivers for resistive panels. The BC designation typically indicates specific performance grades or package variations within the broader AD7873 product line, which also includes variants like AD7873ARUZ and AD7873BRQZ.
Replacement Considerations
Direct pin-compatible replacements include other members of the AD7873 family such as AD7873ARU or AD7873BRU, provided the package style matches. Verify that the replacement part number supports the required 16-lead QSOP form factor if physical footprint constraints are critical.
