1 Features

• Integrated Digital Front End

– Up to 400-kHz I2C Bus Control

– Advanced Waveform Synthesizer

– 2-kB Internal Waveform Memory

– 100-Byte Internal FIFO Interface

– Immersion TS5000-Compliant

– Optional Analog Inputs

• High-Voltage Piezo-Haptic Driver

– Drives up to 100 nF at 200 VPP and 300 Hz

– Drives up to 150 nF at 150 VPP and 300 Hz

– Drives up to 330 nF at 100 VPP and 300 Hz

– Drives up to 680 nF at 50 VPP and 300 Hz

– Differential Output

• 105-V Integrated Boost Converter

– Adjustable Boost Voltage

– Adjustable Boost Current Limit

– Programable Boost Current Limit

– Integrated Power FET and Diode

– No Transformer Required

• 2-ms Fast Start Up Time

• 3.3- to 5.5-V Wide Supply Voltage Range

• 1.8 V-Compatible, VDD-Tolerant Digital Pins

2 Applications

• Mobile Phones and Tablets

• Portable Computers

• Keyboards and Mice

• Electronic Gaming

• Touch Enabled Devices

3 Description

The DRV2667 device is a piezo haptic driver

with integrated 105-V boost switch, integrated

power diode, integrated fully-differential amplifier, and

integrated digital front end capable of driving both

high-voltage and low-voltage piezo haptic actuators.

This versatile device supports HD haptics through the

I2C port or through the analog inputs.

The digital interface of the DRV2667 device is

available through an I2C-compatible bus. A digital

interface relieves the costly processor burden of

the PWM generation or additional analog channel

requirements in the host system. Any writes to the

internal FIFO will automatically wake up the device

and begin playing the waveform after the 2-ms

internal startup procedure. When the data flow stops

or the FIFO under-runs, the device will automatically

enter a pop-less shutdown procedure.

The DRV2667 device also includes waveform

memory to store and recall waveforms with minimal

latency as well as an advanced waveform synthesizer

to construct complex haptic waveforms with minimal

memory usage. This provide a means of hardware

acceleration, relieving the host processor of haptic

generation duties as well as minimizing bus traffic

over the haptic interface.

The boost voltage is set using two external resistors,

and the boost current limit is programmable through

the REXT resistor. A typical start-up time of 2

ms makes the DRV2667 an ideal piezo driver for

fast haptic responses. Thermal overload protection

prevents the device from being damaged when

overdriven.