LTC2656IUFD-H12#PBF

Reference Type:	External, Internal
Base Part Number:	LTC2656
Supplier Device Package:	20-QFN (5x4)
Package / Case:	20-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C
Architecture:	--
INL/DNL (LSB):	±0.5, ±0.1
Voltage - Supply, Digital:	5V
Voltage - Supply, Analog:	5V
Series:	--
Data Interface:	SPI
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	4.6µs (Typ)
Number of D/A Converters:	8
Number of Bits:	12
Part Status:	Active
Packaging:	Tube

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Introduction

LTC2656IUFD-H12#PBF is a family of digital-to-analog converters (DACs) for use in data acquisition applications. It is specifically designed for industrial, automotive, and biomedical applications due to its wide operating temperature range from -40 to +105C, excellent temperature performance, and low power operation. These features make the LTC2656IUFD-H12#PBF an ideal choice for applications requiring precision analog signals in harsh environments.

Application Field

The LTC2656IUFD-H12#PBF is suitable for a wide range of data acquisition applications, including automotive and industrial metering, motor control, medical instrumentation, and many other applications requiring precise analog signals. For automotive applications, the LTC2656IUFD-H12#PBF has the ability to accurately measure battery voltages and current, control automotive powertrain performance, and control various actuators such as throttle control and idle speed control. The low power consumption makes the LTC2656IUFD-H12#PBF ideal for applications requiring battery operation or in systems with limited power supplies. In industrial applications, the LTC2656IUFD-H12#PBF can be used for process control and machine automation, allowing for high-precision analog signals. The low power consumption of the LTC2656IUFD-H12#PBF also makes it ideal for use in portable devices, where long battery life is essential.

Working Principle

The LTC2656IUFD-H12#PBF is a digitally-programmable analog converter. It operates by converting a digital value into an analog voltage, as required by the application. The DAC is a 14-bit device, meaning it can produce resolutions up to 16,383 scaleable analog output steps. The LTC2656IUFD-H12#PBF can accept digital inputs of up to 16 bits, allowing it be programmed to the desired voltage output levels. The converter operates on a 3-wire digital interface consisting of the Serial Clock (SCK), Data Input (DIN), and Data Output (DOUT). Data is clocked in by the SCK pin and is latched by the DOUT pin when DIN is set to high. The DOUT pin can then be used to synchronize the SCK line for the conversion process.The LTC2656IUFD-H12#PBF is designed to be extremely power efficient. It can operate from a single 2.25V to 5.5V supply and still maintain accuracy up to the full power supply range. It has a low power consumption rating of 4.8 mW at 3V, making it ideal for battery powered applications.

Conclusion

The LTC2656IUFD-H12#PBF is an ideal choice for industrial, automotive, and biomedical data acquisition applications in harsh environments. Its wide operating temperature range and low power consumption make it especially suited for applications requiring precision analog signals over long battery life. The 14-bit resolution and digital inputs allow the LTC2656IUFD-H12#PBF to be easily configured and programmed, making it a reliable and accurate choice.

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