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AD5801 View Datasheet(PDF) - Analog Devices

Part NameAD5801 ADI
Analog Devices ADI
DescriptionPiezo-Electric Actuator Controller


AD5801 Datasheet PDF : 13 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Preliminary Technical Data
AD5801
Table 3. Pin Function Descriptions
Pin. No. Mnemonic
Description
SHUTTER_VBATT Power Connection for the Shutter Drivers SOUT1-SOUT3, to be connected to VBATT
STROBE
Duration of the STROBE signal width sets the duration of current pulsed from SOUT1 to SOUT3. The
STROBE function can be disabled and the pulse duration can be programmed over the I”C interface if
required.
LDO2_COMP
This is the compensation pin for the internal Low Drop Out Regulator LDO2. A 4.7µF capacitor should be
connected between LDO2_COMP and ANAGND.
POSSENSE1
Input to ADC, the AD5801 can be used to measure current in an opto-reflective position feedback
scheme,or voltage from a Hall sensor or some other voltage output sensor, to determine lens postion.
POSSENSE2
Input to ADC, the AD5801 can be used to measure current in an opto-reflective position feedback
scheme,or voltage from a Hall sensor or some other voltage output sensor, to determine lens postion.
POSENSAF
Programmable current output.
POSENSZ
Programmable current output.
BIASTRES
Connected to external resistor for bias current generator
XSHUTDOWND Asynchonous system reset signal
SCL
I2C Interface Signal
SDA
I2C Interface Signal
EXTCLK
Optional External Reference Clock Signal
DIG_GND
Digital Ground
VAUX
Digital Supply
ZD
Pattern programmable output driver which can be used for zoom control.
ZC
Pattern programmable output driver which can be used for zoom control.
ZB
Pattern programmable output driver which can be used for zoom control.
ZA
Pattern programmable output driver which can be used for zoom control.
FD
Pattern programmable output driver which can be used for auto focus control.
FC
Pattern programmable output driver which can be used for auto focus control.
PWR_DRIVERS
Power Supply pin for pattern programmable putput drivers FC, FD, ZA, ZB, ZC, and ZD. This pin can be
connected to LDO_ACT or a supply of 5V max.
GND_DRIVESTAGE Ground for Focus Actuator/Motor Drivers FA and FB and for pattern drivers FC, FD, ZA, ZB, ZC, and ZD.
FB
Pattern programmable low Ronoutput driver which can be used for driving auto focus piezo actuator
directly.
FA
Pattern programmable low Ronoutput driver which can be used for driving auto focus piezo actuator
directly.
PWR_DRIVESTAGE Supply for low Ron Drivers FA and FB, can be connected to LDO_ACT or a supply of 5V max.
LDO_ACT
Output of integrated Low Drop Out Regulator. A 10µF decoupling capacitor should be connected
between LDO_ACT and ANAGND.
VBATT
Battery supply connection.
ANAGND
Analog Ground connection.
SHUTTER_GND
Ground connection for Shutter Drivers SOUT1-SOUT3, this pins should be connected to ANAGND and
special care should be exercised to ensure that the ground return path from this pin to ANAGND is kept
to a minimum impedance.
SOUT1
Output for Shutter/Iris/NDF/Lens Cover Drive and control.
SOUT2
Output for Shutter/Iris/NDF/Lens Cover Drive and control.
SOUT3
Output for Shutter/Iris/NDF/Lens Cover Drive and control.
Rev. 0 | Page 7 of 13
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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.

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

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