Preliminary Technical Data

AD5801

Rev. 0 | Page 7 of 13

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.