MD218A SITI [Silicon Touch Technology Inc.], MD218A Datasheet - Page 13

• Manufacturer Part Number: MD218A
• Description: 130mA, 10Bit Current Sinking VCM Driver with I2C Interface
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Application Circuit
Application Notes
SP-MD218A-A.001.doc
I
2
C MASTER
DEVICE
PD = H (IC work)
PD = L (IC ShutDown)
The 11-MD218A is a constant current control IC for application in Auto-Focus.
The supply voltage range VDD of 11-MD218A 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.
The PD pin is the power down pin of 11-MD218A. Logic low level (PD = H) is for
IC operation. On the other hand, its logic high level (PD = L) puts the chip into
power down mode for power saving. It is recommended to keep PD at high level
(PD = L) before operation to reach the maximum efficiency of power saving,
especially for applications in portable devices.
Rp
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Rp
I
2
DEVICE
C SLAVE
VDD
SDA
SCL
Version
7
8
11-MD218B
：
I
10-BIT DAC
A.001
1 F
2
C Interface
PD
2
0.1 F
VSS
4
VDD
1
C
L
= 0.1 F
VCM
AGND
I
L
SINK
Page
Output
Driver
10
9
：
12