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.