DW9714_spec_v0 4.pdf-资料库

DW9714 10bit Resolution VCM driver IC with I2C interface DW9714 - 10bit Resolution VCM driver IC with 12C interface Preliminary Ver. 0.4 2009-11-24 www.dwanatech.com Confidential -

DW9714 10bit Resolution VCM driver IC with I2C interface CONTENTS 1. GENERAL DESCRIPTION ...........................................................................................................................1 Features.........................................................................................................................................................................1 Applications ...................................................................................................................................................................1 2. BLOCK DIAGRAM......................................................................................................................................1 3. PIN INFORMATION ....................................................................................................................................2 Pin placement and IC dimension ...................................................................................................................................2 Pin Description...............................................................................................................................................................2 4. ABSOLUTE MAXIMUM RATINGS .................................................................................................................3 5. RECOMMENDED OPERATING CONDITION...................................................................................................3 Absolute maximum ratings.............................................................................................................................................3 6. ELECTRICAL SPECIFICATION.....................................................................................................................4 7. REGISTER ...............................................................................................................................................5 7.1. I2C format ...................................................................................................................................................5 7.2. Register Format ..........................................................................................................................................6 7.3. SRC Test Results .....................................................................................................................................8 8. I2C PROTOCOL........................................................................................................................................9 Start and Stop condition.................................................................................................................................................9 Complete I2C Data Transfer ..........................................................................................................................................9 I2C timing.....................................................................................................................................................................10 9. TYPICAL APPLICATION CIRCUIT ..............................................................................................................11 10. PACKAGE DIMENSION (6 WLCSP 0.80 X 1.20 X 0.30)............................................................................12 www.dwanatech.com Confidential -

1. General Description DW9714 10bit Resolution VCM driver IC with I2C interface The DW9714 is single 10-bit DAC with 120mA output current sink capability. Designed for linear control of voice coil motors, the DW9714 is capable of operating voltage to 3.6V. The DAC is controlled via a I2C serial interface that operates DAC by clock rates up to 400kHz. The DW9714 incorporates with a power-on reset circuit, power-down function, and exactly matched sense resistor. Power-on reset circuit ensure when supply power up, DAC output is to 0V until valid write-bit value takes place. It has a power down features that reduces the current consumption of the device to 1uA maximum. The DW9714 is designed for auto focus and optical zoom camera phones, digital still cameras, and camcorders applications. The I2C address for the DW9714 is 0x18. Features VCM driver for auto-focus 10bit resolution current sinking of 120mA for VCM VCM slew rate control (SRC) – Linear slope control, Dual level control Supply voltage range (VDD) : 2.3V to 3.6V Fast mode I2C interface (1.8V interface available) Power on reset (POR) Package : 0.80mm(W) X 1.20mm(H) X 0.3mm(T) 6pins WLCSP Applications Digital camera Cell phone Lens auto focus Web camera 2. Block Diagram VDD XSD SCL SDA POR REFERENCE I2C Interface 10bit DAC VDD IOUT Rs=0.5Ω VSS www.dwanatech.com Confidential 1

DW9714 10bit Resolution VCM driver IC with I2C interface 3. Pin Information Pin placement and IC dimension IOUT VSS VDD 1 2 3 6 5 4 XSD XSD SCL SCL SDA SDA 6 5 4 1 2 3 IOUT VSS VDD Top View Bottom View IC size : 0.80(W) X 1.20(L) X 0.30(T) (mm) Minimum pin pitch = 0.4mm ( 6pins WLCSP) Pin Description No. Pin Name 1 2 3 4 5 6 IOUT VSS VDD SDA SCL XSD(1) I/O O - - Output current sink Ground Power supply I/O I2C interface input (DATA) I I I2C interface input/output (CLOCK) Shutdown mode (active low) Description Note (1) XSD : Shutdown mode (active low) 1: Normal operation mode 0: Shutdown mode www.dwanatech.com Confidential 2

4. Absolute Maximum ratings Symbol Parameter VDD Vin Vhbm Vmm Topr Tj Power supply voltage Control input voltage Human body model Machine model Operating temperature range Junction temperature Note> Continuous Power Dissipation (Ta=25℃) 0.80mm X 1.20mm WLCSP, 100 ℃/W 5. Recommended Operating condition Symbol VDD Vin SCL Parameter Power supply voltage Control input voltage I2C bus transmission rate DW9714 10bit Resolution VCM driver IC with I2C interface Min. -0.3 -0.3 -35 Max. 4.5 VDD+0.3 2 200 85 150 Unit V V KV V ℃ ℃ Min. 2.3 1.8 Typ. 2.8 2.8 Max. 3.6 VDD 400 Unit V V kHz Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range (Topr) may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. The implementation of a physical safety measure such as a fuse should be considered when use of the IC in a special mode when the absolute maximum ratings may be exceeded is anticipated. www.dwanatech.com Confidential 3

6. Electrical Specification DW9714 10bit Resolution VCM driver IC with I2C interface (VDD=2.3 to 3.6V, Vin=1.8V to VDD, Ta= -35 to 85℃, unless otherwise specified. Typical values are at 25℃) Characteristic Symbol Condition Min. Typ. Max. Unit Supply Voltage VDD Current Input current Low Level Input Voltage High Level Input Voltage Input current Low Level Input Voltage High Level Input Voltage Glitch rejection Current resolution INL DNL Zero code error VDD ISD IPD IQ VIL VIH VIL VIH INL DNL ZCE IOUT compliance voltage (1) Maximum output current Power on time (2) Imax TPON Overall Shutdown mode Power down mode Quiescent mode Logic input / output (XSD) Logic input / output (SCL,SDA) VCM driver 117.3uA/LSB Zero data loaded to DAC Output current = 100mA 2.3 -1 -1 0.24 -1 1.26 -1 1.26 -4 -1 -1 150 - 50 10 120(3) 12 3.6 +1 +1 0.35 +1 0.54 +1 0.54 +4 +1 +1 V uA uA mA uA V V uA V V ns bits LSB LSB mA mV mA ms (1) The output compliance voltage is guaranteed by design and characterization, not mass production test. (2) DW9714 requires waiting time of 12ms after power on. During this waiting time, the offset calibration of internal amplifier is operating for minimization of output offset current . (3) Maximum output current can be set 60mA to 140mA. www.dwanatech.com Confidential 4

DW9714 10bit Resolution VCM driver IC with I2C interface 7. Register 7.1. I2C format www.dwanatech.com Confidential 5

7.2. Register Format DW9714 10bit Resolution VCM driver IC with I2C interface Byte1 Byte2 PD FL AG D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S3 S2 S1 S0 PD : Power down mode 1: Power down mode (active high) 0: Normal operation mode FLAG : FLAG must keep “L” at writing operation. D[9:0] : Data input Output current = (D[9:0]/1023) X 120mA Max current = 120mA +/- 5% S[3:2] : Codes per step S[3:2] 0 1 2 3 Codes per step 0 (no SRC) – direct driving 1 2 4 SRCT[1:0] Period [us] 0 1 2 3 80 160 320 640 S[1:0] : Step period www.dwanatech.com Confidential 6

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DW9714_spec_v0 4.pdf

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