Haptic Drivers
Low-Power, High-Definition Haptic Drivers: the Buzz in Next Generation Human-Machine Interfaces
Dialog Semiconductor’s DA728x family High-Definition (HD) Haptic Driver provides drive capability at up to 1kHz to cover the broad range of human touch sensitivity. With market-leading idle current consumption (360nA), Linear Resonant Actuator (LRA) resonant frequency tracking capability, and low latency for tact button replacement applications, the DA728x family creates a buzz in smartphones, gaming platforms, wearables, and similar systems.
Powering the Next Generation of Haptic Experiences
Haptic actuators and motors are diversifying at a rapid pace. Gone are the days of simple coin-cell type LRA motors and small ERM (Eccentric Rotating Mass) pager motors. Today’s haptic actuators offer different experiences for different markets. Whether it’s a small pancake LRA for a smart-watch or a large, or a multi-directional, LRA for gaming controllers, Dialog’s patented current drive outputs support all of these motors with up to 500mA of current.
Standalone Haptic Driver Portfolio
| Product | Description | 雷竞技安卓下载 |
|---|---|---|
| DA7280 | Low Power LRA/ERM Haptic Driver | Smartphones, Gaming, Wearables, Automotive, Personal Medical, Touch Displays, Industrial Human-Machine Interfaces |
| DA7281 | Low-power, high-definition haptic driver for multi-driver systems | Smartphone, Gaming, Wearables, Portable computing systems, Computing – all-in-ones (display), Notebook PC, Any display driven consumer product, Automotive, Industrial, Medical |
| DA7282 | Ultra-low standby current, high-definition haptic driver for wearables and related systems | Smartphone, Gaming, Wearables, Portable computing systems, Computing – all-in-ones (display), Notebook PC, Any display driven consumer product, Automotive, Industrial, Medical |
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5 months ago
Da7212 Different output noise for left/right HP out channel
Posted byTomasTrenz0 points 2 repliesHi,
we have Da7212 codec on our custom board, and there is observeble noise apearing on one channel (only), if HP gain increased from -30dB to -29dB.
If bot channels have HP gain (reg 0x48 + 0x49) set to 0x1B onbothoutput channels is observable noise about44 mvpp.
If bot channels have HP gain (reg 0x48 + 0x49) set to 0x1C onrightoutput channels is observable noise about72mVppand onleftchannel noice is44 mvpp
Configuration:
(一步一步向设备)
It is in order: register | value
//software reset
0x1D 0x80
//Activate chip + IO level + LDO
0xFD 0x01
0x91 0x01
0x90 0x90
//PLL for fs = 16kHz with MCLK = 4096kHz
0x22 0x05
0x24 0x00
0x25 0x00
0x26 0x30
0x27 0xc0
0x94 0x00
// Unlock MCLK<5MHz (Mclk = 4096kHz)
0xF0 0x8B
0xF1 0x03
0xF0 0x00
//2ch + 16bit + i2s mode + TDm + DAI enabled + 128 BCLK per WCLK + Dai offset 32bit
0x29 0xe0
0x28 0x02
0x98 0x20
//DAI_R -> DAC_R + DAI_L -> DAC_L
0x2A 0x32
//Ramp rate x16
0x92 0x01
//CP setup
0x47 0xED
0x95 0x06
// disanle lineout
0x4a 0x00
0x6D 0x40
//HP setup
0x48 0x1b
0x49 0x1b
0x6B 0xA8
0x6C 0xA8
//DAI + DAC setup
0x45 0x6f
0x46 0x6f
0x69 0xA0
0x6A 0xA0
//High pass filter
0x44 0xA0
//Mix out
0x4B 0x08
0x4C 0x08
0x6E 0x98
0x6F 0x98
//enable Outputs
0x51 0xF1
Data on I2S lines are zero and clocks are generated correctly. I have try to disable DAI and result was same.
Signal captured from scope, attached in PDF.
Could you plese check if all is set correctly?
Best regards,
Tomas Trenz
| Attachment | Size |
|---|---|
| Captured signal | 300.04 KB |
5 months ago
Hello Tomas,
I will look into this for you.
Could you sent a snippet of the schematic of the DA7212?
Kind regards,
Elliott