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