LTC1099

PRODUCTION

High Speed 8-Bit A/D Converter with Built-In Sample-and-Hold

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Overview

  • 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

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.

Applications

  • 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

LTC1099
High Speed 8-Bit A/D Converter with Built-In Sample-and-Hold
Infinite Hold Time Sample-and-Hold (TACQ = 240ns) Signal-to-Noise Ratio (SNR) vs Input Frequency Product Package 1 Product Package 2
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Data Sheet

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