DA7282 datasheet(4/77 Pages) DIALOG

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DA7282

LRA/ERM Ultra-Low Power Haptic Driver with Multiple

Input Triggers and Integrated Waveform Memory

Datasheet

Revision 3.0

30-Jul-2019

CFR0011-120-00

4 of 77

Figures

Figure 1: System Diagrams ................................................................................................................... 2

Figure 2: DA7282 Block Diagram .......................................................................................................... 8

Figure 3: DA7282 Pinout Diagrams (Top View) for WLCSP (Left) and QFN (Right) ............................ 9

Figure 4: I2C Interface Timing.............................................................................................................. 12

Figure 5: LRA Output Acceleration Swept in Frequency with Constant Power Input Signal .............. 14

Figure 6: Narrowband and Wideband LRA Response across Frequency .......................................... 15

Figure 7: Dual Mode LRA Response across Frequency ..................................................................... 15

Figure 8: System State Diagram ......................................................................................................... 19

Figure 9: Example PWM Inputs with ACCELERATION_EN = 0 ......................................................... 21

Figure 10: LRA Single Step Drive without Acceleration and Rapid Stop ............................................ 24

Figure 11: LRA Single Step with Acceleration and Rapid Stop........................................................... 24

Figure 12: Simple Drive (Top) versus Active Acceleration and Rapid Stop Enabled (Bottom)........... 24

Figure 13: Operation in DRO Mode..................................................................................................... 28

Figure 14: Operation in PWM Mode .................................................................................................... 29

Figure 15: Operation in RTWM Mode ................................................................................................. 30

Figure 16: Operation in ETWM Mode.................................................................................................. 32

Figure 17: Output Voltage and Current for Different AMP_PID_EN Values ....................................... 35

Figure 18: Custom Wave Point Numbering ......................................................................................... 36

Figure 19: Half-Period Control in DRO Mode...................................................................................... 37

Figure 20: Polarity Timing Relationship............................................................................................... 38

Figure 21: Equivalent Electrical Model of an Actuator ........................................................................ 38

Figure 22: Automatic Output Limiting .................................................................................................. 40

Figure 23: Coin ERM Physical and Electrical Summary ..................................................................... 41

Figure 24: VDDIO/EN Pin Control in Push-Pull Configuration and Open Drain Configuration ........... 42

Figure 25: Waveform Memory Structure ............................................................................................. 43

Figure 26: Snippet Ramp and Step with ACCELERATION_EN = 1 ................................................... 45

Figure 27: Snippet Example ................................................................................................................ 45

Figure 28: Command Structure for a Single Frame ............................................................................ 46

Figure 29: Sequence Structure ........................................................................................................... 47

Figure 30: Waveform Memory Example .............................................................................................. 48

Figure 31: Overview of Data Formats with Acceleration Disabled ...................................................... 49

Figure 32: Overview of Data Formats with Acceleration Enabled ....................................................... 50

Figure 33: Schematic of the I2C Control Interface Bus........................................................................ 52

Figure 34: I2C START and STOP Conditions...................................................................................... 52

Figure 35: I2C Byte Write (SDA line) ................................................................................................... 53

Figure 36: Examples of the I2C Byte Read (SDA line) ........................................................................ 53

Figure 37: Examples of I2C Page Read (SDA line) ............................................................................. 53

Figure 38: I2C Page Write (SDA line) .................................................................................................. 54

Figure 39: I2C Repeated Write (SDA line) ........................................................................................... 54

Figure 40: WLCSP Package Outline Drawing..................................................................................... 72

Figure 41: QFN Package Outline Drawing .......................................................................................... 73

Figure 42: External Components Diagram .......................................................................................... 75

Figure 43: WLCSP Example PCB Layout ........................................................................................... 76

Figure 44: QFN Example PCB Layout ................................................................................................ 76

Tables

Table 1: DA728x Feature Comparison .................................................................................................. 6

Table 2: Pin Description ........................................................................................................................ 9

Table 3: Pin Type Definition .................................................................................................................. 9

Table 4: Absolute Maximum Ratings................................................................................................... 10

Table 5: Recommended Operating Conditions ................................................................................... 10

Table 6: Current Consumption ............................................................................................................ 11

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