Datasheet for AD7877ACPZ-REEL7:
- Manufacturer Part Number : AD7877ACPZ-REEL7
- Manufacturer : AD
- Description : Touch Screen Controller IC
- 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 : ROHS Compliant (Lead Free)
- Package Type : 32-Lead LFCSP (5mm x 5mm)
- Pins : 32
- MFG Package Case : CP-32-2
- Part Type : REEL
- Standard Packing Type : Reel
- Standard Packing Quantity : 1500
- Working Temperature : -40 to 85C
- Other Part Number : AD7877ACPZ-REEL7
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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- 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.
