SITI MD218B

11-MD218B
Version
Issue Date
File Name
Total Page
: A.003
: 2009-02-10
: SP-MD218B-A.003.doc
: 17
130mA, 10Bit Current Sinking VCM Driver
with I2C Interface
新竹市展業一路 9 號 7 樓之 1
SILICON TOUCH TECHNOLOGY INC.
9-4F-3, Prosperity Rd I, Science-Based Industrial Park
Hsinchu, Taiwan, R.O.C.
Tel:886-3-5727171
Fax:886-3-5727390
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD218B
130mA, 10-Bit Current Sinking VCM Driver
with I2C Interface
General Specifications
The 11-MD218B is a VCM driver IC with I2C interface control that is capable of
programmable output current sinking. It has a built-in internal voltage reference and
operates in a wide supply voltage range from 2.4V to 5.5V. The DAC is controlled by a
2-wire I2C serial interface which operates in I2C fast mode (400 kHz). The 11-MD218B is
designed for applications like image stabilization, auto-focus, and optical zoom in camera
phones, digital still cameras, and other portable module devices.
Features and Benefits
z
Programmable output current sinking
z
I2C serial interface
z
10-BIT DAC resolution
z
2.4V – 5.5V power supply
z
Low voltage control for digital pin PD, SDA, and SCL(i.e., VIH = 1.54V @ VDD = 2.8V)
z
Power down operation
z
Power on reset
z
Constant current control
z
Ultra small package: DFN10 (3*3*0.8 mm), WLCSP(0.99*1.87*0.5 mm)
Ordering Information
Part Number
Package
Marking
11-MD218B WLCSP
WLCSP, 8Pin
GXX* or HXX*
DFN, 10Pin
XXXX**G
11-MD218B DFN
*XX means lot number
**XXXX means lot number
SP-MD218B-A.003.doc
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Pin Assignment
Pin Assignment of DFN10 (3*3*0.8 mm)
Pin Descriptions
1.
Pin NO.
Pin Name
Description
1
VDD
2
PD
3
NC
4
VSS
5
NC
6
NC
7
SDA
I2C Interface Data
8
SCL
I2C Interface Data
9
AGND
Analog GND
10
SINK
Analog Output : Output Current Sink
Power Supply Pin
Digital Input: Power Down Mode(High power down, Low operation)
Ground Pin
The I2C slave 7-bit address of 11-MD218B is 0001-1xx.
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Pin Assignment of WLCSP (0.99*1.87*0.5mm)
TOP View
WL1
WL8
WL2
WL7
WL3
WL6
WL4
WL5
Pin NO.
Pin Name
Description
WL1
SINK
Programmable Sink Current
WL2
AGND
Current Sinking GND
WL3
SCL
I2C Interface Data
WL4
SDA
I2C Interface Data
WL5
VSS
Ground Pin
WL6
VSS
Ground Pin
Wl7
PD
IC Power Down Pin(Logic ‘H’: power down)
WL8
VDD
IC Power Pin
Absolute Maximum Ratings
Unless otherwise noted, TA= 25℃
Characteristic
Symbol
Rating
Unit
Supply Voltage
VDD
5.5
V
Input Voltage
VIN
VDD+0.4
V
Maximum Sink Current
ISINK
150
mA
Operating Temperature Range
TOPR
-40 ~ 125
°C
Storage Temperature Range
TSTG
-65 ~ 150
°C
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Electrical Characteristic
Unless otherwise noted, TA= 25℃, VDD = 2.8 V and VCM = 28.5Ω, 460uH.
Item
Sym.
Limit
Condition
Unit
Min.
Typ.
Max.
2.4
2.8
5.5
V
Power Supply
Supply Voltage
VDD
Supply Current
IPD
PD = H (Power down mode)
-
-
0.5
uA
( IDD )
IDD
PD = L, I2C= logic H
-
-
0.1
mA
PD, SDA, SCL digital control pin
Input Voltage H
VIH
-
0.55*VDD
-
VDD+0.4
V
Input Voltage L
VIL
-
-0.4
-
0.2*VDD
V
Parameters
DAC Resolution
10
DNL
+/-0.8
+/-1
LSB
INL
+/-1
+/-5
LSB
5
uA
Output Offset Current
IOS
Current Slew Rate
SR
Output Constant
Current Settling Time
ts
Voltage Drop
ΔV
PD = L, I2C= logic H
Bits
3
VDD = 2.8V, ISINK = 100mA
ΔV = VSINK − VAGND (@
-
mA/us
40
80
us
0.32
0.35
V
ISINK = 80 mA)
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Block Diagram
(DFN10)
PD
VDD
2
1
Power ON
Reset
SCL
8
I2C Interface
SDA
Voltage
Reference
10-Bit
DAC
Output
Driver
10
SINK
7
4
9
VSS
AGND
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Terminology
Resolution
The DAC resolution is defined by the number of distinct analog levels corresponding to the
number of bits it uses.
N-bit resolution -> 2N distinct analog levels
Differential Nonlinearity (DNL) error
The variation in analog step sizes away from 1 LSB by any two adjacent codes. Usually,
gain and offset errors have been removed.
Integral Nonlinearity (INL)
It is the deviation of actual transfer response from a straight line. Usually, INL error is
referred to as the maximum INL error.
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Data Format
11-MD218B Write Mode
When in the write mode, data is written to the 11-MD218B and shifted step-by-step into the
16-bit input register. When all data has been loaded in and master signal receives a STOP
condition, the loaded data in the input register is transferred to the DAC.
11-MD218B Read Mode
When 11-MD218B is in the write mode, data is read back from IC to master in the same bit
order.
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Table
MSB
LSB
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Serial Data Bits 7
Input Register R15 R14 R13 R12 R11 R10 R09 R08 R07 R06 R05 R04 R03 R02 R01 R00
SPD X D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 X
X
X
X
Function
z
SPD (Soft Power Down, 2nd standby mode): IC power down controlled by software.
Regarding to all kinds of IC operation situations please refers to following table.
z
PD
SPD
IC status
H
-
Power down
L
L
IC Active
H
Soft power down
X denotes “Don’t care/Unused”.
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Performance Characteristics
1. DNL Plot
Typical DNL Plot @VDD=2.8V, 25degree
2
1.5
1
DNL (LSB)
0.5
0
-0.5
-1
-1.5
-2
100
200
300
400
500
600
700
800
900
1000
800
900
1000
DIGITAL Code
2. INL Plot
Typical INL Plot @VDD=2.8V, 25degree
2
1.5
1
INL (LSB)
0.5
0
-0.5
-1
-1.5
-2
100
200
300
400
500
600
700
DIGITAL Code
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3. Settling Time (VDD = 2.8V, VCM = 27Ohm with [email protected], [email protected], respectively, CL =
0.1uF @Temp. = 25)
4. Sink Current vs. Codes vs. Temp.
Isink vs. Codes vs. Temp.
140
120
Isink (mA)
100
80
60
40
Temp. = -40
20
Temp. = 25
Temp. = 85
100
200
300
400
500
600
700
800
900
1000
DIGITAL Code
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5. Full-Scale Programmable Current vs. Temp. vs. VDD
Full-Scale Current vs. VDD vs. Temp.
160
Temp. = -40
Temp. = 25
Temp. = 85
Full Scale Programmable Current (mA)
150
140
130
120
110
100
-40
-20
0
20
40
60
80
Temp.
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Application Circuit
CL= 0.1 F
VCM
VDD
1 F
Rp
0.1 F
IL
Rp
1
11-MD218B
SDA
SCL
I2C MASTER
DEVICE
I2C SLAVE
DEVICE
7
VDD
10
SINK
Output
Driver
I2C Interface
10-BIT DAC
8
VSS
PD
2
AGND
4
9
PD = H (power down mode)
PD = L (IC operation)
Application Notes
z
The 11-MD218B is a constant current control IC for application in Auto-Focus.
The supply voltage range VDD of 11-MD218B is from 2.4V to 5.5V. The input
range of digital control pin PD, and digital I/O pins SCL and SDA, are defined
such that logic “H” is from 0.55*VDD to VDD+0.4V and logic “L” is from –0.4V to
0.2*VDD. Therefore, the three digital pins are suitable controlled by 1.8V ISP.
z
The PD pin is the power down pin of 11-MD218B. Logic low level (PD = L) is for
IC operation. On the other hand, its logic high level (PD = H) puts the chip into
power down mode for power saving. It is recommended to keep PD at high level
(PD = H) before operation to reach the maximum efficiency of power saving,
especially for applications in portable devices.
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z
The I2C bus would not be well controlled by master if VDD of Driver IC is
shutdown(i.e., not applying voltage on VDD pin) because of ESD diode turning on
via P-diode of SDA/or SCL. To avoid the application issue, NOT to turn off VDD of
driver IC during whole module operation. It could be controlled by PD pin via
GPIO of ISP. The power consumption of Driver IC should be 1.4uW in the
standby mode (PD = H).
z
In order to ensure the stability of output current, a compensation capacitance CL
is suggested placing across the two terminals of VCM. The suggested value of CL
is about 0.1~0.22uF and could be fine tuned for different VCM.
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Package Specification
(DFN-10)
SYMBOL
A
A1
A3
b
D
D1
E
E1
L
e
e1
MIN.
0.70
0.00
0.18
2.90
2.10
2.90
1.10
0.45
SP-MD218B-A.003.doc
DIMENSION
(mm)
NOM.
0.75
0.02
0.203 REF
0.25
3.00
2.20
3.00
1.20
0.55
0.50 BASIC
2.00 BASIC
MAX.
0.80
0.05
MIN.
28
0
0.30
3.10
2.30
3.10
1.30
0.65
7
114
83
114
86
18
Version:A.003
DIMENSION
(mil)
NOM.
30
0.8
8 REF
10
118
87
118
87
22
20 BASIC
80 BASIC
MAX.
32
2
12
122
91
122
91
26
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Package Specifications (WLCSP)
Bottom View
E
A1
A
A2
L1
D
e1
b
L2
e2
DIMENSION
(mm)
SYMBOL
A
A1
A2
b
D
E
e1
e2
L1
L2
SP-MD218B-A.003.doc
MIN.
0.445
0.17
0.275
0.24
1.83
0.95
0.160
0.220
NOM.
0.5
0.20
0.30
0.26
1.87
0.99
0.50
0.50
0.185
0.245
Version:A.003
MAX.
0.555
0.23
0.325
0.28
1.91
1.03
0.210
0.270
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The products listed herein are designed for ordinary electronic applications, such as
electrical appliances, audio-visual equipment, communications 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 products 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.
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