LTC2657BIFE-L16#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Number of Bits:	16
Number of D/A Converters:	8
Settling Time:	9.1µs (Typ)
Output Type:	Voltage - Buffered
Differential Output:	No
Data Interface:	I²C
Reference Type:	External, Internal
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Voltage - Supply, Digital:	2.7 V ~ 5.5 V
INL/DNL (LSB):	±2, ±0.3
Architecture:	--
Operating Temperature:	-40°C ~ 85°C
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	20-TSSOP-EP
Base Part Number:	LTC2657

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Data Acquisition - Digital to Analog Converters (DAC)

Digital-to-Analog Converters, more commonly known as DACs, are essential components of modern data acquisition systems and play a role in many types of applications. Amongst all DACs, the LTC2657BIFE-L16#PBF is one of the leading products in terms of performance and price, and is suitable for a wide range of applications. This paper aims to explain the general application field and working principle of the LTC2657BIFE-L16#PBF.

Applications

The LTC2657BIFE-L16#PBF is a 16-bit DAC with a 1.8V to 5.5V supply voltage range and rail-to-rail output. This DAC is capable of as high as 1 Msps conversion rate and can provide 16-bit resolution with accuracy as good as ±3mV at 3V output. Furthermore, it is capable of providing multiple write options such as Write Single, Write Multiple, and Supported Readback. More importantly, it can operate in any combination of output voltage ranges, making it suitable for a wide range of data conversion applications, such as DAC reference voltage, voltage output devices, and various DAC bit-serial communications.

Working Principle

The LTC2657BIFE-L16#PBF is a 16-bit DAC designed to convert digital input values into analog signals. This DAC uses an internal reference voltage of 1.17 V along with an internal gain of 2mV/LSB. This reference voltage is used as the reference for the output voltage of the DAC. In operation, the input digital values are converted into the output analog values by the operation of the capacitor arrays.The capacitor arrays consist of MOSFETs and capacitors and are used to store the digital values. When a digital input value is received, the DAC automatically calculates the voltage output value using the stored digital values and the internal reference voltage. The output voltage is then proportional to the digital input values when the reference voltage is held constant.

Conclusion

The LTC2657BIFE-L16#PBF is a 16-bit DAC capable of as high as 1 Msps conversion rate. It offers multiple write options along with accurate 16-bit resolution (up to ±3mV @ 3V output). In addition, the ability to operate in any combination of output voltage ranges makes it suitable for a wide range of data conversion applications, such as DAC reference voltage, voltage output devices, and various DAC bit-serial communications. In its working principle, the DAC uses an internal reference voltage of 1.17V and internal gain of 2mV/LSB. It then uses a capacitor array to store the digital values and calculates the output voltage by using the stored digital values and the reference voltage. The performance, accuracy and wide range of applications make the LTC2657BIFE-L16#PBF one of the leading DACs on the market.

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