The MAX11811 is a low-power, ultra-small, resistive touch-screen controller with haptic driver.
The MAX11811 is a low‑power, ultra‑small resistive touch‑screen controller that operates from a single 1.7 V to 3.6 V supply. It includes a 12‑bit SAR ADC, a multiplexer for panel interfacing, and a digital serial I²C bus for communication. The device offers direct and autonomous modes, on‑chip FIFO buffering, and data‑tagging of touch events.
Key features include a built‑in haptic driver for vibration motors or piezo actuators, general‑purpose current DAC and input pins for LEDs or proximity sensors, and extensive ESD protection. The controller is supplied in a 20‑pin TQFN package and is qualified for industrial (‑40 °C to +85 °C) and automotive (‑40 °C to +105 °C) temperature ranges. Typical applications are mobile devices, digital cameras, POS terminals, and automotive center consoles.
| Supply Voltage | 1.7 V to 3.6 V single supply |
|---|---|
| ADC Resolution | 12‑bit SAR |
| I²C Interface Speed | 400 kHz |
| Package | 20‑pin, 4 mm × 4 mm TQFN |
| Power Consumption | 250 pW at Vpp = 1.7 V, 34.4 ksps |
| ESD Protection | +8 kV HBM (X+, X-, Y+, Y-) |
| Industrial Temperature Range | ‑40 °C to +85 °C |
| Automotive Temperature Range | ‑40 °C to +105 °C |
It operates from a single supply voltage of 1.7 V to 3.6 V.
It provides digital preprocessing and a smart interrupt function that lowers bus activity and interrupt frequency.
The device generates PWM signals to drive the MAX11835 haptic piezo controller.