1. Device Overview: AD1853

️· Type: It appears to be a mixed-signal processor/codec, likely for audio applications (decoding, processing, and output).
️· Revision: REV. A

2. Absolute Maximum Ratings

Parameter	Min	Max	Units
DVDD to DGND	-0.3	6	V
AVDD to AGND	-0.3	6	V
Digital Inputs	-0.3	6	V
Analog Outputs	-0.3	6	V
AGND to DGND	-0.3	0.3	V
Reference Voltage	-0.3	0.3	V
Soldering Temperature	+300		°C
	10		sec

*These are stress limits. Exceeding them can cause permanent damage.*

3. Thermal Characteristics

Parameter	Value	Units
θJA (Junction-to-Ambient)	109	°C/W
θJC (Junction-to-Case)	39	°C/W

*These values describe how heat dissipates from the chip.*

4. Ordering Guide & Package Options

Model	Temperature Range	Package Description	Package Option
AD1853JRS	0°C to +70°C	28-Lead Shrink Small Outline	RS-28
AD1853JRSRL	0°C to +70°C	28-Lead Shrink Small Outline on 13" Reels	RS-28

*Provides ordering information for the chip.*

5. Pin Configuration (Key Pins)

*Illustrates a simplified pinout diagram. Here are some important pins (from the diagram and surrounding text):*
️· DVDD: Digital Supply Voltage
️· DGND: Digital Ground
️· AVDD: Analog Supply Voltage
️· AGND: Analog Ground
️· MCLK: Master Clock
️· CLATCH: Clock latch
️· CCLK: Channel Clock
️· CDATA: Channel Data
️· ZEROR: Zero Reference
️· DEEMP: De-Emphasis
️· IREF: Reference Input
️· SDATA: Serial Data In
️· BCLK: Bit Clock
️· L/RCLK: Left/Right Clock
️· RST: Reset
️· MUTE: Mute
️· ZEROL: Zero Left
️· OUTL+: Output Left Positive
️· OUTR+: Output Right Positive
️· FILTR: Filter
️· FILTB: Filter B

*This is a partial listing; the full diagram would show all 28 pins.*

6. Cautions

️· ESD Sensitivity: The device is sensitive to Electrostatic Discharge (ESD) and requires precautions to prevent damage.

IMPORTANT NOTES & CONTEXT:

️· Data Completeness: This is an excerpt from a larger datasheet. Critical information, like detailed electrical characteristics, functional block diagrams, timing diagrams, and comprehensive descriptions of the various registers and processing features, is missing. *Do not attempt to design or use this device based solely on this text.*
️· Outdated/Legacy Device: The AD1853 is an older, likely discontinued, Analog Devices part. It's unlikely to be readily available for purchase. Analog Devices likely has superseded it with newer devices.
️· REV. A: The "REV. A" designation indicates it's a very early revision of the device. There may be subsequent revisions with changes to the specifications or functionality.
️· Text Formatting: The formatting of this text is problematic. The table alignment is broken. This makes extracting structured information difficult.
️· Missing Information: Critical operational parameters (supply voltage requirements, clock frequencies, input/output ranges, etc.) are not provided.