Monday, May 30, 2005 4:55 PM
Piezo-Electric Actuator Controller
Preliminary Technical Data
AD5801
ev. 0 | Page 1 of 13
FEATURES
Two Efficient Class D-type Amplifiers
Six Integrated Pattern Drivers
Programmable Output Drive Patterns
12-bit ADC Voltage or Current Sensing for Position Feedback
Programmable Shutter Control
On board temperature sensing
Optional Off-board Temperature Sensing
32-lead 5mm X 5mm LFCSP Package
APPLICATIONS
Camera Phones
Piezoelectric Positioning
Piezo Actuators
Lens Auto focus
Lens Zoom
Iris/Exposure
NDF Neutral density Filter
Shutter
Camera Phone
Camera Enabled PDA
Camera/Image Modules
Digital Still Camera DSC
Web Cameras
Security Cameras
Digital Camcorders
GENERAL DESCRIPTION
The AD5801 is a high efficiency ultrasonic motor controller
with two Class D-type output drivers. These Class D-type
drivers can be used independently or configured as an H-bridge
driver, and have full pattern programmability. There are also six
integrated drivers which can be operated independently and
have programmable output patterns. The AD5801 also has
integrated drivers which are programmable from 130mA to
200mA, and may be used for a combination of Shutter and
NDF/IRIS control.
The operation modes of the drivers are invoked by the AD5801
using an I2C compatible interface.
The I2C address for the AD5801 is TBD.
FUNCTIONAL BLOCK DIAGRAM
LDO1
LDO2
Figure 1. AD5801 Functional Block Diagram.
PRODUCT HIGHLIGHTS
1. Eight independent output drivers.
2. Available in 32-Lead (5mm X 5mm) LFCSP package.
3. Multiplexed input 12-bit resolution ADC for voltage or
current measuring.
4. Dual temperature sensing feature, Integrated AD5801
temperature sensing and optional external temperature
reading of position sensor.
6. Low Ron in Auto Focus driver switches, 0.5 Ω max.
7. Fully guaranteed in the 2.8 V to 4.5 V supply range.
8. Integrated Shutter/Iris/NDF optional controls
