1. General Overview:

️· Device: AD7667
️· Type: Analog-to-Digital Converter (ADC)
️· Function: Converts analog signals to digital data.
️· Preliminary Datasheet: This is an early version, indicating specifications are subject to change.

2. Absolute Maximum Ratings:

️· Analog Power (AVDD): 5V nominal.
️· Digital Inputs: -0.3V to DVDD + 3.0V
️· Internal Power Dissipation: 700 mW (free air, 48-Lead LQFP) or 2.5W (free air, 48-Lead LFCSP)
️· Junction Temperature: 150°C
️· Storage Temperature Range: -65°C to +150°C
️· Lead Temperature (Soldering): 300°C
️· Important Note: Stresses beyond the absolute maximum ratings can cause permanent damage.

3. Digital Interface Timing Considerations:

️· Load Capacitance: The SYNC, SCLK, and SDOUT timings are defined with a maximum load capacitance (C_L) of 10 pF. If the load is higher, timing characteristics may not meet specifications.

4. Pin Configuration & Function Descriptions (Key Points):

️· AVDD: Analog power supply pins (5V).
️· BYTESWAP: Selects parallel port output order (LSB/MSB first).
️· OB/2C: Selects between straight binary and binary two's complement output.
️· WARP/IMPULSE: Mode selection inputs for power and performance optimization. (WARP LOW, IMPULSE HIGH yields faster mode).
️· SER/PAR: Selects between serial and parallel interface modes.
️· DATA[0:5]: Parallel data bus, used for serial communication in serial mode.
️· EXT/INT: Selects between internal and external data clock for serial communication.
️· Important Note: The datasheet describes complex interactions between these pins to configure the ADC's behavior. Careful consideration of their settings is required.

5. Ordering Information:

Model	Temperature Range	Package Description	Package Option
AD7667AST	–40°C to +85°C	Quad Flatpack (LQFP)	ST-48
AD7667ASTRL	–40°C to +85°C	Quad Flatpack (LQFP)	ST-48
AD7667ACP	–40°C to +85°C	Chip Scale (LFCSP)	CP-48
AD7667ACPRL	–40°C to +85°C	Chip Scale (LFCSP)	CP-48
EVAL-AD7667CB1	N/A	Evaluation Board	N/A
EVAL-CONTROL BRD22	N/A	Controller Board	N/A

6. ESD Caution:

️· The AD7667 is ESD-sensitive. Proper handling procedures are necessary to avoid damage.

Summary of Key Functionality Modes based on pin selections
️· Parallel mode: BYTESWAP, OB/_2C_ selected.
️· Serial mode: SER/PAR High
️· Power optimization : WARP low, Impulse high
️· External Clock: EXT/INT High.

What's Missing and Considerations for Using This Datasheet:

️· Timing Diagrams: Detailed timing diagrams for the digital interface are crucial but are not included in the provided excerpt.
️· Electrical Characteristics: A full datasheet would include detailed electrical specifications (resolution, accuracy, sampling rate, etc.).
️· Application Information: Guidance on circuit design, layout recommendations, and example applications would be present in a complete datasheet.
️· Revision Level: This is a preliminary datasheet, and specifications could change.