Datasheet for AD7877:
- Manufacturer Part Number : AD7877
- Manufacturer : AD
- Description : Touch Screen Controller
- Series : AD7877
- Reference Price : USD 1.768
- Our Price : We have a better price, contact us by email
- Product Type : Integrated/Special Purpose A/D Converters
- Function : Capacitive to Digital & Touch Screen 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 : AD7877
- 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 AD7877. If you need any more information about AD7877, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
- 4-wire touch screen interface
- LCD noise reduction feature (STOPACQ pin)
- Automatic conversion sequencer and timer
- User-programmable conversion parameters
- On-chip temperature sensor:
−40°C to +85°C - On-chip 2.5 V reference
- On-chip 8-bit DAC
- 3 auxiliary analog inputs
- 1 dedicated and 3 optional GPIOs
- 3 interrupt outputs
- 2 direct battery measurement channels (0.5 V to 5 V)
- Qualified for automotive applications
- See Data Sheet for additional features
The AD7877 also has an on-board reference of 2.5 V. When not in use, it 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 of 0 V to VREF. The device includes a shutdown mode that reduces its current consumption to less than 1 μA.
To reduce the effects of noise from LCDs, the acquisition phase of the on-board ADC is controlled via the STOPACQ pin. User-programmable conversion controls include variable acquisition time and first conversion delay. Up to 16 averages can be taken per conversion. There is also an on-board DAC for LCD back-light or contrast control. The AD7877 runs in either slave or master mode using a conversion sequencer and timer. It is ideal for battery-powered systems such as personal digital assistants with resistive touch screens and other portable equipment.
The part is available in a 32-lead lead frame chip scale package (LFCSP), and a 25-ball wafer level chip scale package (WLCSP). AD7877W model is qualified for automotive applications.
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sale terminals
- Medical devices
- Cell phones
- 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.
