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Analog Devices IC, ADC, 12-BIT, QUAD, I2C, AD7991-1, SOT-23 | IC | DEX

Analog Devices IC, ADC, 12-BIT, QUAD, I2C, AD7991-1, SOT-23 | IC | DEX

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Analog Devices IC, ADC, 12-BIT, QUAD, I2C, AD7991-1, SOT-23

The AD7991/AD7995/AD7999 are 12-/10-/8-bit, low power, successive approximation ADCs with an I2 C-compatible interface. Each part operates from a single 2.7 V to 5.5 V power supply and features a 1 µs conversion time. The track-and-hold amplifier allows each part to handle input frequencies of up to 14 MHz, and a multiplexer allows taking samples from four channels. Each AD7991/AD7995/AD7999 provides a 2-wire serial interface compatible with I2 C interfaces. The AD7991 and AD7995 come in two versions and each version has an individual I 2 C address. This allows two of the same devices to be connected to the same I2 C bus. Both versions support standard, fast, and high speed I2 C interface modes. The AD7999 comes in one version. The AD7991/AD7995/AD7999 normally remain in a shutdown state, powering up only for conversions. The conversion process is controlled by a command mode, during which each I2 C read operation initiates a conversion and returns the result over the I 2 C bus



  • 12-/10-/8-bit ADCs with fast conversion time: 1 µs typical 4 analog input channels/3 analog input channels with reference input
  • Specified for VDD of 2.7 V to 5.5 V
  • Sequencer operation
  • Temperature range: −40°C to +125°C I 2C-compatible serial interface supports standard, fast, and high-speed modes 2 versions allow 2 I2C addresses
  • Low power consumption
  • Shutdown mode: 1 µA maximum 8-lead SOT-23 package
  • Qualified for automotive applications



  • System monitoring
  • Battery-powered systems
  • Data acquisition
  • Medical instruments




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