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?W@^?I? 9 ? 4 ? 3 silicon touch technology inc . 9 - 4 f - 3 , prosperity road i, s cience based industrial park, hsin - chu, taiwan 300, r.o.c. tel 886 - 3 - 5645656 fax 886 - 3 - 5645626 vm14 9 c version : a .00 7 issue date : 20 1 6 - 1 - 1 1 file name : sp - vm149 c - a . 00 7 . doc total page : 1 2 1 20 ma, 10bit current sinking vcm driver with i 2 c i nterface
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 1 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c 1 20 ma, 10 - bit current sinking vcm driver with i 2 c interface general specifications the vm14 9 c is a vcm (voice coil moto r ) driver ic with i 2 c interface control that is capable of programmable sink ing output current . it has a b uil t - in internal voltage reference and operates with a supply voltage range fr om 2. 3 v to 3.6 v . the dac is controlled by a signal transmit through a 2 - wire i 2 c serial interface which operates in an i 2 c fast mode ( 4 00 khz ) . the vm149 c is designed for applications such as image stabilization , autofocus in camera phones, and other porta ble devices. features and benefits ? programmable sinking output current ? i 2 c serial interface ? dac with 10 - bit resolution ? 2. 3 v ~ 3.6 v power source ? selective output slew rate control (src) ? low voltage control for digital pin p s , sda, and scl ? power saving mode ? automatic p ower on reset ordering information part number package marking vm149 c wlcsp, 6 pin tbd
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 2 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c t erminology resolution the dac resolution is defined by the power factor of 2, which defines t he number of distinct digitized levels. n - bit resolution - > 2 n 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.
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 3 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c pin assignment top view pin number pin name description 1 sink analog output : current sink pin 2 vss ground pin 3 vdd power input pin 4 sda i 2 c interface data line (serial data line ) 5 scl i 2 c interface clock line (serial clock line ) 6 p s digital input: power s aving c ontrol (when p s = low , chip is disable d ) (when p s = high , chip is enable d ) absolute maximum ratings unless otherwise noted , t a = 25 characteristic symbol rating unit supply voltage v dd - 0. 4 ~ 3.6 v input signal voltage v in - 0. 4 ~ v dd +0.4 v maximum sink current i sink 1 3 0 ma operating temperature t opr - 40 ~ 85 ? stg - 55 ~ 150 ?
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 4 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c electrical characteristic unless otherwise noted , t a = 25 , v dd = 2.8 v and vcm 32 ? , 460uh . item sym. condition limit unit min. typ. max. power supply supply voltage v dd - 2. 3 2.8 3.6 v supply current ( i dd ) i p s p s = low ( chip is disable d ) - < 1 u a i dd 0 p s = high , sp s (*1) = high - < 1 u a i dd1 p s = high , sp s (*1) = low - 1. 8 2. 3 ma p s , sda, scl digital pin input voltage h igh v ih - 1.26 - v dd +0.4 v input voltage l ow v il - - 0.4 - 0.54 v input current h igh i ih - il - parameters d ac resolution - - 10 - bits dnl - - +/ - 0. 7 +/ - 1 lsb maximum output sink current i s,max d[9:0]=3ff(*2) 114 1 20 126 ma zero code output sink current i s,min d[9:0]=000(*2) - 0. 1 1 u a output offset current i os p s = h , sp s (*1) = h - 0. 1 1 u a voltage dro p (* 3 ) (@ i sink = 85 ma ) - 0. 0 8 v note : (*1): sp s (soft power saving , 2 nd standby mode): ic power saving mode , controlled by software. (*2): the value of sink current through pin sink is set by d[9:0] li nearly. (*3): is the voltage of sink pin , and is the voltage of motor driver vss pin v ? mvss sink v v v ? ? ? sink v mvss v
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 5 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c block diagram
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 6 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c data format vm149 c write mode i n the writing mode, data is written to the vm149 c and s hifted into a 16 - bit input register. after all 16 bits of data ha ve been shifted in , a stop signal is generated by master controller. t he data in the input register is transferred to the dac at the same time . vm149 c read mode i n read ing mode, data is re ad from ic to a master controller in the same bit order. scl sda 0 1 1 0 0 0 0 w 9 1 9 1 9 1 ack by 11 - vm 149 ack by 11 - vm 149 ack by 11 - vm 149 stop by master start by master frame 1 serial bus address byte frame 2 most significant data byte frame 3 least significant data byte sps d 9 d 8 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 s 3 s 2 s 1 s 0 0 stop by master scl sda 0 1 1 0 0 0 0 r 9 1 9 1 9 1 ack by 11 - vm 149 ack by master nack by master start by master frame 1 serial bus address byte frame 2 most significant data byte frame 3 least significant data byte sps d 9 d 8 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 s 3 s 2 s 1 s 0 0
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 7 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c table msb lsb serial data bits 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 input register r15 r14 r13 r12 r11 r10 r09 r08 r07 r06 r05 r04 r03 r02 r01 r00 function sp s 0 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 s3 s2 s1 s0 ? sps ( soft power saving , 2 nd standby mode ): ic power sav ing , controlled by software. the operation s are defined by the following table. p s sp s ic status low - p ower saving high l ow normal h igh soft power saving if p s is at logic low level; the chip is forced to shut down all power. if p s is at logic high l evel, the chip will be controlled by the sp s bit(the r15 bit of the register) to perform normally(sp s =low) or to softly power off the ic(sps =high). it is recommended to keep p s at low level (p s = l ) while the chip is in no operation mode to save power for all applications. ? d[9:0]: the level of sink current through pin sink is set by d[9:0].
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 8 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c ? s[3 :0]: output current slew rate control: the output current slew rate can be set by s[3:2 ] : as step control and s[1:0] as step period. s[3:2] : code step contro l s[3:2] code per step 0 0 (no src) 1 1 2 2 3 4 s[1:0] :src step period s[1:0] period (us) 0 64 1 128 2 256 3 512 code per 1 step is set by s[3:2] 1 step period is set by s[1:0] no src s[3:0] =0 code per 1 step is set by s[3:2] 1 step period is set by s[1:0] no src s[3:0] =0
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 9 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c application circuit application notes ? the vm149 c is a constant current driving ic for application s in auto - focus. the supply voltage range vdd of vm149 c is from 2. 3 v to 3.6v . the input range of digital control pin p s , and digital i/o pins scl and sda, are defined such that logic h igh is from 1.26v to vdd+0.4v and logic l ow is from C 0.4v to 0. 54v . therefore, the three digital pins are suitable controlled by 1.8v isp.
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 10 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c package specifications (wlcsp 06 10 ): (0. 6 05 mm *1. 005 mm *0. 30 mm ) symbol dimension (mm) min. nom. max. a 0.265 0.300 0.335 a1 0.040 0.050 0.060 a 2 0.225 0.250 0.275 b 0.020 0.025 0.030 d 0.970 1.005 1.040 e 0.570 0.605 0.640 e 1 0.120 0.150 0.180 l 1 0.120 0.150 0.180 l 2 0.120 0.150 0.180 e1 0. 296 0. 316 0. 336 e2 0. 325 0.345 0. 365 e3 0. 325 0.345 0. 365 s1 0.161 0.191 0.221 s2 0.170 0.200 0.2 30 s3 0.161 0.191 0.221 p1 0.136 0.166 0.196 p2 0.136 0.166 0.196 s1 1 0.090 0.105 0.12 0 p2 1 0.059 0.074 0.089
1 20 ma, 10bit current sinking vcm driver with i 2 c interface version a .00 7 page 11 ??u }u ??_? ?????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. vm14 9c the products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio - visual equipment, c ommunications devices and so on. hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime - prevention equipment and the like. misusing those prod ucts may directly or indirectly endanger human life, or cause injury and property loss. silicon touch technology, inc. will not take any responsibilities regarding the misusage of the products mentioned above. anyone who purchases any products described herein with the above - mentioned intention or with such misused applications should accept full responsibility and indemnify. silicon touch technology, inc. and its distributors and all their officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation. silicon touch technology, inc. reserve the right to make changes t o their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.

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