Datasheet for AD7873:
- Manufacturer Part Number : AD7873
- Manufacturer : AD
- Description : Touch Screen Digitizer
- Series : AD7873
- Reference Price : USD 1.608
- Our Price : We have a better price, contact us by email
- Product Type : Integrated/Special Purpose A/D Converters
- Function : Resistive Touch Controllers
- Current Suggest : Production
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : AD7873
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
Contact us to check the best price and real time inventory quantity for AD7873. If you need any more information about AD7873, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
- 4-Wire touch screen interface
- On-chip temperature sensor:
–40°C to +85°C - On-chip 2.5 V reference
- Direct battery measurement (0 V to 6 V)
- Touch pressure measurement
- Specified throughput rate
of 125 kSPS - Single supply, VCC of 2.2 V to 5.25 V
- Ratiometric conversion
- High speed serial interface
- Programmable
8- or 12-bit resolution - One auxiliary analog input
- Shutdown mode: 1 µA maximum
- 16-lead QSOP, TSSOP, and LFCSP packages
The AD7873 is a 12-bit successive approximation ADC with a synchronous serial interface and low on resistance switches for driving touch screens. The AD7873 operates from a single 2.2 V to 5.25 V supply, with a throughput rate of 125 kSPS.
The AD7873 features direct battery measurement, temperature measurement, and touch pressure measurement. The AD7873 also has an on-board reference of 2.5 V that can be used for the auxiliary input, battery monitor, and temperature measurement modes. When not in use, the internal reference can be shut down to conserve power. An external reference can also be applied and varied from 1 V to VCC with an analog input range from 0 V to VREF. The device includes a shutdown mode that reduces the current consumption to less than 1 µA.
The AD7873 features on-board switches. This, coupled with low power and high speed operation, makes the device ideal for battery-powered systems with resistive touch screens. The part is available in a 16-lead, 0.15 inch quarter size outline package (QSOP), a 16-lead, thin shrink small outline package (TSSOP), and a 16-lead, lead frame chip scale package (LFCSP).
Product Highlights
- Ratiometric conversion mode available, eliminating errors due to on-board switch resistances.
- On-board temperature sensor: −40°C to +85°C.
- Battery monitor input.
- Touch pressure measurement capability.
- Low power consumption of 1.37 mW maximum with the reference off, or 2.41 mW typical with the reference on, at 125 kSPS and VCC at 3.6 V.
- Package options include 4 mm × 4 mm LFCSP.
- Analog input range from 0 V to VREF.
- Versatile serial I/O ports.
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sale terminals
- Pagers
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
