MAX11871

TINI Touch-Screen Controller SoC for Mutual Projected Capacitive Touch

Integrates Super-Narrowband AFE to Provide Breakthrough Immunity to AC Charger and LCD Noise Without Any External Components
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Status Explanations for product status codes

Part Number Status
MAX11871 Active: In Production. See Ordering Information for details.

Description

TINI® products deliver unparalleled integration to consumer applications. The portfolio includes complete system-on-chip (SoC) solutions and codecs that integrate multiple functions to achieve advantages in board space.
A flagship member of the TINI family, the MAX11871 is a fully integrated touch-screen controller SoC for space-constrained applications such as smartphones, e-readers, and small tablet PCs. The device offers the industry's highest SNR analog front-end (AFE) for capacitive touch sensing, a MAXQ® CPU for full backend processing, and a custom DSP coprocessor.
The integration of a super-narrowband AFE provides breakthrough immunity to AC charger and LCD noise without any external components. The SoC offers the industry's highest SNR, enabling chip-on-flex and chip-on-board designs. With the MAX11871, customers can eliminate air-gap and shield layers to design thinner products capable of supporting noisy chargers, passive-stylus touch, and gloved-hand touch.
The MAX11871 is designed to interface with projected capacitive touch screens, detect multiple touches, and produce an image of measured capacitance values. The device supports up to 20 drive and 12 sense channels for a total of 240 nodes, at up to 120 frames per second (fps). The device can provide XY coordinate data as well as Z "pressure" metric for each touch point.
The device operates standalone or in conjunction with Maxim's TacTouch™ family of haptic controllers. When paired with a TacTouch tactile-feedback controller, the MAX11871 provides a near-zero-latency touch and haptic solution.
The MAX11871 uses three separate supply voltage inputs: VAVDD = 2.7V to 3.6V, VDVDD = 1.7V to 1.9V, VDVDDIO = VDVDD to 3.6V. The device is available in a 48-pin UTQFN (6mm x 6mm x 0.5mm) with exposed pad and a 49-bump WLP (3.7mm x 3.7mm x 0.64mm). All devices are specified over the extended temperature range (-40°C to +85°C) .

Data Sheet

Key Features

  • Very-High Signal-to-Noise Ratio (SNR)(1000:1)
  • Offers Reliable Touch in Presence of Noise and Delivers Optimal Operation Frequency Selection
    • Excellent Interference Immunity to Sources such as LCD, AC-DC Chargers, and CCFL
  • Provides Fast Report Rate
    • Up to 120Hz Frame Rate
  • Comprehensive Touch-Screen Support
    • Up to 4.5in Diagonal with 5mm Pitch
  • TacTouch Trigger to Haptic Actuator Controllers
    • MAX11835 Haptic Piezo Controller
  • Upgradable Firmware and Parameter Storage
  • Slave Mode I²C 400kHz
  • Multiple Power Supplies
    • Analog Supply from 2.7V to 3.6V (AVDD)
    • Digital Supply from 1.7V to 1.9V (DVDD)
    • Digital I/O Supply from DVDD to 3.6V (DVDDIO)
  • Low Power Consumption
    • Sleep Mode (Shutdown)—10µW (typ)
    • Active Mode—10mW (typ)
  • ±4kV HBM ESD Protection
 

Applications/Uses

  • Portable Instruments
  • POS Terminals
  • Smartphones, PND Devices, Media Players
  • Tablets/PCs
   

Key Specifications:

Touch Interface Products
Part Number Interface Channels Haptic Functions Digital I/O Supply Voltage
(V)
Digital Supply Voltage
(V)
Analog Supply Voltage
(V)
Analog Supply Voltage
(V)
Integrated Proximity Sensing Oper. Temp.
(°C)
min max min max
MAX11871  I2C 32 Trigger Output 1.7 1.9 2.7 3.6 No -40 to +85
See All Touch Interface Products (1)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



More Information

New Product Press Release   2012-01-05 ]

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Document Ref.: 19-5817 Rev 3; 2013-09-11
This page last modified: 2013-09-11