Analog Devices Inc. AD5620/AD5640/AD5660 nanoDACs

Analog Devices AD5620/AD5640/AD5660 nanoDACs are offered as low power, single, 12-/14-/16-bit, buffered voltage-out DACs. Guaranteed monotonic by design, the devices integrate a power-on reset circuit that ensures the nanoDACs output powers up to 0V (AD5620/AD5640/AD5660-1-2) or midscale (AD5620-3 and AD5660-3) and remains at the voltage until a valid write takes place. A power-down feature reduces the current consumption of the nanoDACs to 480nA at 5V and delivers software-selectable output loads while in power-down mode. These devices have a power consumption rate of 2.5mW at 5V and 1μW in power-down mode. The on-chip precision output amplifier enables rail-to-rail output swing to be achieved. The AD5620/AD5640/AD5660 have a versatile 3-wire serial interface that operates at clock rates up to 30MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The AD5620/AD5640/AD5660-1 devices feature an internal, 1.25V, 5ppm/°C reference, enabling a full-scale output voltage range of 2.5V. The AD5620/AD5640/AD5660-2-3 devices have an internal, 2.5V, 5ppm/°C reference, allowing a full-scale output voltage range of 5V.

Features

  • Low power, single nanoDACs
    • AD5660: 16 bits
    • AD5640: 14 bits
    • AD5620: 12 bits
  • 12-bit accuracy guaranteed
  • On-chip, 1.25V/2.5V, 5ppm/°C reference
  • Tiny 8-lead SOT-23, MSOP, and LFCSP packages
  • Power-down to 480nA @ 5V, 200nA @ 3V
  • 3V/5V single power supply
  • Guaranteed 16-bit monotonic by design
  • Power-on reset to zero/midscale
  • 3 power-down functions
  • Serial interface with Schmitt-triggered inputs
  • Rail-to-rail operation
  • SYNC interrupt facility

Applications

  • Process control
  • Data acquisition systems
  • Portable battery-powered instruments
  • Digital gain and offset adjustment
  • Programmable voltage and current sources
  • Programmable attenuators

Functional Block Diagram

Analog Devices Inc. AD5620/AD5640/AD5660 nanoDACs
Publicado: 2015-10-20 | Actualizado: 2022-03-11