製品概要

機能と利点

  • SPI interface with error detection
    • Includes CRC, invalid read/write address, and SCLK count error detection
    • Supports burst mode and daisy-chain mode
    • Industry-standard SPI Mode 0 and SPI Mode 3 interface compatible
  • Round robin mode allows switching times comparable with a parallel interface
  • General-purpose digital outputs that can be used to control other devices such as Analog Devices’ parallel switches
  • 4 Ω typical on resistance at 25°C
  • 0.5 Ω typical on-resistance flatness at 25°C
  • 0.2 Ω typical on-resistance match between channels at 25°C
  • VSS to VDD analog signal range
    • Fully specified at ±15 V, ±5 V, and +12 V
    • Power-up sequence of VDD, VSS, and GND before applying VL and digital/analog inputs
  • 1.8 V logic compatibility with 2.7 V ≤ VL ≤ 3.3 V
  • 24-lead LFCSP package

製品概要

The ADGS1408 / ADGS1409 are analog multiplexers comprising eight single channels and four differential channels, respectively. A serial peripheral interface (SPI) controls the switches. The SPI interface has robust error detection features such as cyclic redundancy check (CRC) error detection, invalid read/write address detection, and SCLK count error detection.

It is possible to daisy-chain multiple ADGS1408 / ADGS1409 devices together. Daisy-chain mode enables the configuration of multiple devices with a minimal amount of digital lines. The ADGS1408 / ADGS1409 can also operate in burst mode to decrease the time between SPI commands.

iCMOS construction ensures ultra low power dissipation, making the devices ideally suited for portable and battery-powered instruments.

Each switch conducts equally well in both directions when on, and each switch has an input signal range that extends to the supplies. In the off condition, signal levels up to the supplies are blocked.

The on-resistance profile is flat over the full analog input range, which ensures linearity and low distortion when switching audio signals.

PRODUCT HIGHLIGHTS

  1. SPI interface removes the need for parallel conversion, logic traces, and reduces GPIO channel count.
  2. Daisy-chain mode removes additional logic traces when multiple devices are used.
  3. CRC error detection, invalid read/write address detection, and SCLK count error detection ensure a robust digital interface.
  4. CRC and error detection capabilities allow the use of the ADGS1408/ADGS1409 in safety critical systems.
  5. Minimal distortion.

APPLICATIONS

  • Automated test equipment
  • Data acquisition systems
  • Battery-powered systems
  • Sample-and-hold systems
  • Audio signal routing
  • Video signal routing
  • Communications systems
  • Relay replacement 

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