AS7057-BWLT Overview
WLCSP is the way it is packaged.The Reel package contains it.
AS7057-BWLT Features

AS7057-BWLT Applications
There are a lot of OSRAM Opto Semiconductors, Inc.
AS7057-BWLT AFE applications.

Cell Phones
Digital Multimeters, PLC's (Programming Logic Controllers)
RADAR processing, digital oscilloscopes
CMOS Image sensors for mobile applications
Medical Instrumentation and medical imaging
Music recording
Digital signal processing
Scientific instruments
Rotary encoder
Displaying

Package / Case	WLCSP
Mounting Style	SMD/SMT
RoHS	Details
Interface Type	I2C
Minimum Operating Temperature	- 30 C
Maximum Operating Temperature	+ 85 C
Packaging	Reel
Product	Analog Front End - AFE