LTC2657CFE-L12#TRPBF

Reference Type:	External, Internal
Base Part Number:	LTC2657
Supplier Device Package:	20-TSSOP-EP
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	0°C ~ 70°C
Architecture:	--
INL/DNL (LSB):	±0.5, ±0.1
Voltage - Supply, Digital:	2.7 V ~ 5.5 V
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Series:	--
Data Interface:	I²C
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	3.9µs (Typ)
Number of D/A Converters:	8
Number of Bits:	12
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LTC2657CFE-L12#TRPBF is a low-power, low voltage 12-bit digital to analog converter (DAC) device designed for industrial, medical, and consumer applications. This device offers 2.7V to 5.5V single-supply operation and features an on-chip voltage reference. It operates from 80 kHz to 3 MHz clock rates, making it ideal for high-speed applications. The device consists of an 18-bit input register, 12-bit DAC register, and a power amplifier.

Application Field

The LTC2657CFE-L12#TRPBF is a digital-to-analog conversion solution for applications such as test and measurement equipment, instrumentation systems, process control and automatic test systems, consumer audio and video equipment, and battery-operated products. The device’s 12-bit resolution provides a higher precision than what is typically available with other DAC solutions. Additionally, the device features an on-chip voltage reference, which allows the user to accurately control the output voltage level.The device also features a power amplifier, which allows the user to easily drive multiple LEDs, LCDs, audio amplifiers, motors, and other loads. Additionally, the device features an integrated fast power-on circuitry that eliminates the need for large output capacitors, allowing the designer to optimize the device’s power requirements while still maintaining a fast settling time and offering superior EMI performance.

Working Principle

The LTC2657CFE-L12#TRPBF works by first receiving an 18-bit digital code from the processor. The 18-bit input data is shifted into the device’s DAC register and then converted to analog using the on-chip voltage reference. The output amplifier then drives the analog signal to the load. The device also offers a power down mode, which reduces the output voltage to approximately 0.4V. In addition to providing 12-bits of resolution, the device offers an SPI (Serial Peripheral Interface) and parallel interface. The SPI interface provides access to the device’s registers and advanced features, while the parallel interface simplifies the user’s system design and lowers the total number of required components.

Conclusion

The LTC2657CFE-L12#TRPBF is an ideal solution for applications requiring low-voltage and low-power operation. The device offers 12-bit resolution, an on-chip voltage reference, and integrated power amplifier, making it an ideal solution for applications such as test and measurement equipment, instrumentation systems, process control and automatic test systems, consumer audio and video equipment, and battery-operated products. Additionally, the device features a SPI and parallel interface, eliminating the need for complicated circuit designs.

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