Document
VM149F
Version Issue Date File Name
Total Page
: A.002 : 2013-10-14 : SP-VM149F-A.002.doc
: 12
120mA, 10Bit Current Sinking VCM Driver with I2C Interface
9 7 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
VM149F
120mA, 10-Bit Current Sinking VCM Driver with I2C Interface
General Specifications
The VM149F is a VCM (Voice Coil Motor) driver IC with I2C interface control that is capable of programmable sinking output current. It has a built-in internal voltage reference and operates with a supply voltage range from 2.3V to 3.6V. The DAC is controlled by a signal transmit through a 2-wire I2C serial interface which operates in an I2C fast mode (400 kHz). The VM149F is designed for applications such as image stabilization, autofocus in camera phones, and other portable devices.
Features and Benefits
z Programmable sinking output current z I2C serial interface z DAC with 10-bit resolution z 2.3V – 3.6V power source z Selective Output Slew Rate Control (SRC) z Low voltage control for digital pin PS, SDA, and SCL z Power saving mode z Automatic power on reset z Ultra small package: WLCSP (0.805mm*1.295mm*0.35mm)
Ordering Information
Part Number VM149F
Package WLCSP, 6Pin
Marking TBD
120mA, 10Bit Current Sinking VCM Driver with I2C Interface
Version:A.002
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page1
VM149F
Terminology
Resolution The DAC resolution is defined by the power factor of 2, which defines the number of distinct digitized levels. N-bit resolution -> 2N distinct digitized levels Differential Nonlinearity (DNL) error The variation in digitized step value away from 1 LSB by any two adjacent digitized levels, gain and offset errors removed.
120mA, 10Bit Current Sinking VCM Driver with I2C Interface
Version:A.002
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page2
Pin Assignment
TOP View
VM149F
Pin Number
1 2 3 4 5
6
Pin Name SINK VSS VDD SDA SCL
PS
Description
Analog Output : Current Sink Pin Ground Pin Power Input Pin I2C Interface Data Line (Serial Data Line) I2C Interface Clock Line (Serial Clock Line) Digital Input: Power Saving Control (When PS=High, chip is disabled) (When PS=Low, chip is enabled)
Absolute Maximum Ratings
Unless otherwise noted, TA= 25℃ Characteristic
Supply Voltage
Input Signal Voltage
Maximum Sink Current
Operating Temperature
Storage Temperature
Symbol VDD VIN ISINK TOPR TSTG
Rating -0.4 ~ 3.6 -0.4 ~ VDD+0.4
130 -40 ~ 85 -55 ~ 150
Unit V V mA °C °C
120mA, 10Bit Current Sinking VCM Driver with I2C Interface
Version:A.002
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page3
VM149F
Electrical Characteristic
Unless otherwise noted, TA= 25℃, VDD = 2.8 V and VCM ≈ 32Ω, 460uH.
Item
Sym.
Condition
Power Supply
Supply Voltage
Supply Current ( IDD )
VDD IPS IDD0 IDD1
PS, SDA, SCL digital pin
Input Voltage High Input Voltage Low
VIH VIL
Input Current High
IIH
Input Current Low
IIL
PS = High (chip is disabled) PS = Low, SPS(*1)= High PS = Low, SPS(*1)= Low
-
Min.
2.3 -
1.26 -0.4
Parameters DAC Resolution DNL INL
-
-
Maximum Output Sink Current
IS,max D[9:0]=3FF(*2)
Zero Code Output Sink Current
IS,min D[9:0]=000(*2)
-
Output Offset Current IOS PS = L, SPS(*1)= H
-
Voltage Drop
ΔV ΔV = VSINK − VMVSS (*3)
(@ISINK = 85 mA)
-
Limit Typ.
Unit Max.
2.8 3.6 V < 1 uA < 1 uA
1.8 2.3 mA
- VDD+0.4 V - 0.54 V
±1 uA ±1 uA
10 - Bits +/-0.7 +/-1 LSB +/-1.5 +/-4 LSB
120 mA
0.1 1 uA 0.1 1 uA 0.08 V
Note: (*1): SPS (Soft Power Saving, 2nd standby mode): IC power saving mode, controlled by software.
(*2): The value of sink current through pin SINK is set by D[9:0] linearly. (*3): VSINK is the voltage of SINK pin, and VMVSS is the voltage of motor driver VSS pin
120mA, 10Bit Current Sinking VCM Driver with I2C Interface
Version:A.002
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page4
Block Diagram
VM149F
120mA, 10Bit Current Sinking VCM Driver with I2C Interface
Version:A.002
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page5
VM149F
Data Format
VM149F Write Mode In the writing mode, data is written to the VM149F and shifted into a 16-bit input register. After all 16 bits of data have been shifted in, a STOP signal is generated by master controller. The data in the input register is transferred to the DAC at the same time.
1 91 91 9
SCL
SDA
0 0 0 1 1 0 0 W SPS 0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S3 S2 S1 S0
START by MASTER
FRAME 1 Serial Bus Address Byte
ACK by 11-VM149
FRAME 2 Most Significant
Data Byte
ACK by 11-VM149
FRAME 3 Least Significant
Data Byte
ACK by STOP by 11-VM149 MASTER
VM149F Read M.