EUM6820
100mA Current Sink VCM Driver
with I
2
C Interface
DESCRIPTION
The EUM6820 is a single 10-bit DAC with 100mA
output current sink capability. It features an internal
reference, I
2
C interface, 10 bits DAC and current sense
resistor. The DAC is controlled via a 2-wire (I
2
C
compatible) serial interface that operates at clock rates
up to 400kHz. The EUM6820 can operates from 2.3V
to 5.5V.
The EUM6820 incorporates a power-on reset circuit,
which ensures that DAC output powers up to 0V and
remains there until a valid write takes place. It has a
power-down feature that reduces the current
consumption of the device to 1µA maximum.
The EUM6820 principally designed for linear control
of voice coil motors, targeting at autofocus, image
stabilization, and optical zoom applications in camera
phones , digital still cameras, and camcorders. While it
may also used in many industrial applications, such as
controlling temperature, light, and movement.
The I
2
C address for the EUM6820 is 0
×
18.
FEATURES
100mA current sink
2-wire (I
2
C-compatible) 1.8V serial interface
10-bit resolution DAC
2.3V to 5.5V power supply
Guaranteed monotonic over all codes
Power-down to 0.5µA typical
Internal reference
Current sense resistor integrated
Power-down function
Power-on reset
Available in 1.0mm
×
1.5mm WCSP-6 package
RoHS compliant and 100% lead (Pb)-free
APPLICATIONS
Camera phones
Digital still cameras
Web/PC cameras
Digital video cameras/camcorders
Lens autofocus
Lens covers
Optical zoom
Image stabilization
Shutters
Neutral density filters
Application Circuit
Figure 1. Application Circuit
DS6820
Ver0.1
June 2009
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
