AD5421BREZ-REEL7

Reference Type:	External, Internal
Base Part Number:	AD5421
Supplier Device Package:	28-TSSOP-EP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 105°C
Architecture:	Cyclic Serial
INL/DNL (LSB):	-, ±1 (Max)
Voltage - Supply, Digital:	3.17 V ~ 3.48 V
Voltage - Supply, Analog:	1.71 V ~ 5.5 V
Series:	--
Data Interface:	SPI, DSP
Differential Output:	No
Output Type:	Voltage - Unbuffered
Settling Time:	50µs (Typ)
Number of D/A Converters:	1
Number of Bits:	16
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The AD5421BREZ-REEL7 is a versatile and reliable digital-to-analog converter (DAC). It offers high performance and cost-efficiency in a wide range of applications, including medical, consumer, industrial, and automotive markets. The device integrates an 8-bit data register interface and a low noise 3.2 V reference voltage. It is a standard 16-pin epoxy-molded plastic package with a power dissipation of 15 mW. It provides an excellent linearity and settling time of 0.1%, and an I2C or SPI interface.

Specifications

The AD5421BREZ-REEL7 offers a maximum output voltage of +3.3 V with a full-scale span of 1.45 V. It delivers a typical THD of 0.05% and a full scale settling time of 4 μs. The device is designed with variable analog and digital reference inputs, which can be programmed from -5 V to +5 V. The device features an on-chip power dissipation of 15 mW and a static current consumption of 30 μA. It also features a power-saving mode, which reduces the power consumption to 200 μA @ 3.3 V when the device is idle.

Application Field and Working Principle

The AD5421BREZ-REEL7 is a suitable choice for applications requiring precise digitized output. Its wide temperature operating range of -40 °C to +125 °C and low power consumption makes it an ideal choice for medical, consumer, industrial, and automotive markets. It also shows robust operation over long-term use, due to its excellent snubbing and dithering circuitry. The device is typically used in applications that require precise digital-to-analog conversions such as digital to audio conversion and motor speed control. Its programming feature offers users the flexibility to select the desired voltage level and the desired range – from -5 V to + 5 V. The working principle of the device is fairly simple. When the user inputs a binary value, the device forms an output voltage that is proportional to the input value. The bits are processed and a corresponding reference voltage is formed. This reference voltage is then compared to the analog input. The device then produces an analog voltage that is proportional to the difference between the reference voltage and the analog input.

Conclusion

The AD5421BREZ-REEL7 is a versatile and reliable digital-to-analog converter, offering good performance and cost-efficiency in a variety of applications. Its low power consumption and wide temperature operating range make it a suitable choice for medical, consumer, industrial, and automotive applications. The device offers an excellent linearity, settling time

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