Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- PINOUT INFORMATION
- ABSOLUTE MAXIMUM RATINGS
- THERMAL INFORMATION
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- TIMING REQUIREMENTS
- TYPICAL CHARACTERISTICS
- SYSTEM DIAGRAMS
- APPLICATION INFORMATION
- ECCENTRIC ROTATING MASS MOTORS (ERM)
- LINEAR RESONANCE ACTUATORS (LRA)
- AUTO-RESONANCE ENGINE FOR LRA
- OPEN LOOP OPERATION FOR LRA
- SMART LOOP ARCHITECTURE
- AUTO CALIBRATION
- WAVEFORM LIBRARIES
- WAVEFORM SEQUENCER
- LIBRARY PARAMETERIZATION
- REAL-TIME PLAYBACK (RTP) MODE
- MULTI-MODE INPUT PIN (IN/TRIG)
- DEVICE ENABLE
- CONSTANT VIBRATION STRENGTH
- EDGE RATE CONTROL
- CAPACITOR SELECTION
- MODES OF OPERATION
- BLOCK DIAGRAM
- GENERAL I2C OPERATION
- SINGLE-BYTE AND MULTIPLE-BYTE TRANSFERS
- SINGLE-BYTE WRITE
- MULTIPLE-BYTE WRITE AND INCREMENTAL MULTIPLE-BYTE WRITE
- SINGLE-BYTE READ
- MULTIPLE-BYTE READ
- REGISTER MAP
- DEVICE PROGRAMMING
- WAVEFORM LIBRARY EFFECTS LIST
- PCB LAYOUT RECOMMENDATIONS
- Revision History
DRV2605
www.ti.com
SLOS825B –DECEMBER 2012–REVISED JANUARY 2014
DEVICE ENABLE
The EN pin of the DRV2605 is used to gate the active operation. When EN is logic high, the DRV2605 is active,
and when EN is logic low, the device enters a state that is equivalent to the low-power STANDBY state. The
device registers are not reset. This is particularly useful for constant source PWM/analog input modes to
maintain compatibility with non-I
2
C device signaling. EN must be high to write I
2
C device registers. To completely
reset the device into the power up state, set the Dev_Reset bit.
CONSTANT VIBRATION STRENGTH
The DRV2605 PWM input uses a digital level-shifter, so as long as the input voltage meets the V
IH
and V
IL
levels, the vibration strength will remain the same even if the digital levels were to vary. The DRV2605 also
features power supply feedback, so if the supply voltage drifts over time (due to battery discharge, for example),
the vibration strength will remain the same so long as there is enough supply voltage to sustain the required
output voltage.
EDGE RATE CONTROL
The DRV2605 output driver implements Edge Rate Control (ERC). This ensures that the rise and fall
characteristics of the output drivers do not emit levels of radiation that could interfere with other circuitry common
in mobile and portable platforms. Because of ERC, no output filter, capacitors, or ferrites are necessary.
CAPACITOR SELECTION
The DRV2605 has a switching output stage which pulls transient currents through the VDD pin. A 0.1 µF, low
equivalent-series-resistance (ESR) supply bypass capacitor of the X5R or X7R type is recommended to be
placed near the VDD supply pin for smooth operation of the output driver and the digital portion of the device. A
similar capacitor should be placed from VREG to ground.
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