Features and Benefits

  • Built-In Sample-and-Hold
  • No Missing Codes
  • No User Trims Required
  • All Timing Inputs Edge Sensitive for Easy Processor Interface
  • Fast Conversion Time: 2.5µs
  • Latched Three-State Outputs
  • Single 5V Operation
  • No External Clock
  • Overflow Output Allows Cascading
  • TC Input Allows User Adjustable Conversion Time
  • 0.3" Wide 20-Pin PDIP

Product Details

The LTC1099 is a high speed microprocessor compatible 8-bit analog-to-digital converter (A/D). An internal sample-and-hold (S/H) allows the A/D to convert inputs up to the full Nyquist limit. With a conversion rate of 2.5µs, this allows 156kHz 5VP-P input signals or slew rates as high as 2.5V/µs, to be digitized without the need for an external S/H.

Two modes of operation, READ (RD) mode and WRITE-READ (WR-RD) mode, allows easy interface with processors. All timing is internal and edge sensitive which eliminates the need for external pulse shaping circuits. The Stand-Alone (S/A) mode is convenient for those applications not involving a processor.

Data outputs are latched with three-state control to allow easy interface to a processor data bus or I/O port. An overflow output (OFL) is provided to allow cascading for higher resolution.


  • Resolution: 8 Bits
  • Conversion Time: 
    • 2.5µs (RD Mode)
    • 2.5µs (WR-RD Mode)
  • Slew Rate Limit (Internal S/H): 2.5V/µs
  • Low Power: 75mW Max
  • Total Unadjusted Error
    • LTC1099: ±1LSB
    • LTC1099A: ±1/2LSB

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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