A3904ECGTR

A3904ECGTR Datasheet


A3904 Low Voltage Voice Coil Motor Driver

Part Datasheet
A3904ECGTR A3904ECGTR A3904ECGTR (pdf)
Related Parts Information
A3904EEWTR-P A3904EEWTR-P A3904EEWTR-P
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A3904 Low Voltage Voice Coil Motor Driver

Discontinued Product

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.

Date of status change March 4, 2013

Recommended Substitutions:

For existing customer transition, and for new customers or new applications, contact Allegro Sales.

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

A3904 Low Voltage Voice Coil Motor Driver

Fixed I2C logic thresholds 8-bit D-to-A converter 500 uA resolution Low voltage I2C serial interface Low current-draw sleep mode to V operation mm x mm, mm maximum overall height WLCSP

Package 6-ball wafer-level chip scale package CG
mm x mm

The A3904 is a voice coil motor VCM driver, with an I2C-compatible serial interface. Designed for camera autofocus and zoom applications, this high accuracy digital IC is provided in a WLCSP package ideal for portable devices. Its operating voltage range is to V, and its maximum output current is 127 mA.

Output current is programmed via the I2C interface, in 500 uA increments, with clock rates up to 400 kHz. I2C inputs set the internal D-to-A converter output voltage that is the reference for linear current control via a MOSFET output sink transistor. To conserve battery power, a logic low signal on the SLEEPZ input disables the output MOSFET and reduces the supply current to uA.

A3904 internal protection features include thermal shutdown and undervoltage lockout. Logic input levels are independent of the supply voltage. The operating temperature range is to 85°C.

The A3904 is available in a bumped wafer level chip scale package WLCSP suffix CG .

Not to scale

Functional Block Diagram
kΩ kΩ

I2C Master

I2C Slave

SDA SCL SLEEPZ

Bandgap Ref

I2C Serial Interface
8 Bit DAC

EW only
to V IOUT

A3904

Low Voltage Voice Coil Motor Driver

Selection Guide

A3904ECGTR

Packing 4000 pieces per reel

Package Bumped wafer-level chip-scale package WLCSP

Pb-Free Pb-free chip with high-temperature solder balls RoHS compliant

Absolute Maximum Ratings

Characteristic Supply Voltage Logic Input Voltage Range Operating Ambient Temperature Maximum Junction Temperature Storage Temperature

Symbol VDD VIN TA

TJ max Tstg

Range E

Notes

Rating 6
to VDD+0.3 to 85 150 to 150
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Datasheet ID: A3904ECGTR 516021