ANALOG DEVICES  AD421BNZ  Digital to Analog Converter, 16 bit, 125 SPS, Serial, 2.95V to 5.05V, DIP, 16


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  • Manufacturer:
  • Newark Part No.: 59K3526
  • Manufacturer Part No AD421BNZ

Product Overview

The AD421BNZ is a Loop-powered DAC designed to meet the needs of smart transmitter manufacturers in the industrial control industry. It provides a high precision and fully integrated solution as well it is ideal for extending the resolution of smart 4mA to 20mA transmitters at very low cost. It includes a selectable regulator that is used to power itself and other devices in the transmitter. The part also contains +1.25 and +2.5V precision references. The AD421 thus eliminates the need for a discrete regulator and voltage reference. The only external components required are a number of passive components and a pass transistor to span large loop voltages. The Sigma-Delta (Σ-Δ) architecture of the DAC guarantees 16-bit monotonicity while the integral nonlinearity for the AD421 is ±0.01%. The AD421 can be used with standard HART FSK protocol communication circuitry without any degradation in specified performance.
  • HART® compatible
  • 16-bit Resolution and monotonicity
  • 0.01% Integral nonlinearity
  • 750μA Maximum quiescent current
  • Programmable alarm current capability
  • Flexible high speed serial interface


ESD sensitive device, take proper precaution while handling the device.
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Product Specifications, Documents & More

  • ADC / DAC Case Style: DIP
  • Data Interface: Serial
  • Input Channel Type: Serial
  • MSL: -
  • No. of Pins: 16
  • Operating Temperature Max: 85°C
  • Operating Temperature Min: -40°C
  • Packaging: Each
  • Resolution (Bits): 16bit
  • SVHC: No SVHC (15-Jun-2015)
  • Sampling Rate: 125SPS
  • Supply Current: 575µA
  • Supply Voltage Range: 2.95V to 5.05V
  • Supply Voltage Range - Analog: 2.95V to 5.05V

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    More stock available week commencing 3/21/16

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