HI5728IN-T

Reference Type:	External, Internal
Base Part Number:	HI5728
Supplier Device Package:	48-TQFP (7x7)
Package / Case:	48-LQFP
Operating Temperature:	-40°C ~ 85°C
Architecture:	Current Source
INL/DNL (LSB):	±0.5, ±0.25
Voltage - Supply, Digital:	2.7 V ~ 5.5 V
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Series:	--
Data Interface:	Parallel
Differential Output:	Yes
Output Type:	Current - Unbuffered
Settling Time:	35ns (Typ)
Number of D/A Converters:	2
Number of Bits:	10
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Data Acquisition - Digital to Analog Converters (DAC) HI5728IN-T Application Field and Working Principle

Digital-to-Analog Converters (DACs) are devices used to convert digital signals into analog signals that can be used by the output devices such as monitors and speakers. HI5728IN-T is a high precision 8-bit digital-to-analog converter specifically crafted for low-power and space-constrained applications, such as portable medical devices and home appliances. The following section will discuss the application field, and the working principle of HI5728IN-T.

Application Field

The application field of HI5728IN-T mainly focuses on low-power and space-constrained applications. HI5728IN-T is designed to deliver high performance and low power consumption. It consumes only 1.5mA at 5V, achieving very low power requirements. It also requires fewer external components, which can save space and cost. Furthermore, its wide temperature range of -40 to +85 °C makes it ideal for rugged embedded and consumer window applications.

Working Principle

The working principle of the HI5728IN-T is based on the parallel interface architecture, where two 8-bit MSB and LSB words are written to the DAC register. The outputs of the DAC scale linearly with respect to the digital input code. With the HI5728IN-T, the digital coding scheme is based on 8-bit binary input coding, which provides 256 different output levels or steps. The DAC is also SPI/MICROWIRE compatible, allowing the bus interface to be controlled using hardware commands. The digital interface logic of the HI5728IN-T supports bidirectional transfer of the data bus between the DAC and the controller. The SPI interface utilizes a 3-wire serial interface comprising of clock (SCK), data in (SDI) and data out (SDO). The MICROWIRE interface is a 4-wire serial interface comprising of clock (SCK), chip select (CS/MR), data in (SDI) and data out (SDO). The HI5728IN-T is also equipped with an output buffer for direct connection to the load with voltage referencing. A low power shutdown mode is also provided in the form of a power-down bit (PD) in the register. The output buffer is disabled by writing the power-down bit in the register, thereby placing the device in the power-down mode.

Conclusion

In conclusion, the HI5728IN-T is a high precision 8-bit digital-to-analog converter designed specifically for low-power and space-constrained applications. It utilizes a parallel interface architecture and SPI/MICROWIRE compatible digital interface, which allows it to be easily used in devices with limited resources. With its wide temperature range, low power consumption and output buffer, the HI5728IN-T is suitable for applications such as portable medical devices and home appliances.

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