LTC1453IN8#PBF

Reference Type:	External, Internal
Base Part Number:	LTC1453
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Operating Temperature:	-40°C ~ 85°C
Architecture:	R-2R
INL/DNL (LSB):	±4 (Max), ±0.5 (Max)
Voltage - Supply, Digital:	2.7 V ~ 5.5 V
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Series:	--
Data Interface:	SPI
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	14µs (Typ)
Number of D/A Converters:	1
Number of Bits:	12
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Digital to Analog Converters (DAC): LTC1453IN8#PBF Application Field and Working Principle

Digital to Analog Converters (DAC) are devices used to convert digital signals into analog form. The most common type is the “integrated circuit DAC”, which is mostly used as an interface between digital devices and analog systems. The present device, LTC1453IN8#PBF is one such IC DAC. Application Field: The LTC1453IN8#PBF is a high-speed current steering DAC, capable of producing scalable peak current outputs of 200mA with adjustable slew rate and transient-free operation that ensures smooth output operation. It can operate from a single 5V supply and includes a low-impedance output driver capable of driving a range of different loads. It is an ideal solution for applications such as general-purpose DACs, feedback loops, and low-power analog-to-digital (A/D) conversion.The key features of LTC1453IN8#PBF include a wide input/output (I/O) common-mode range, 46kHz/82kHz/160kHz/320kHz throughput data rate, 8-bit resolution and a ±10V output swing. It is also capable of generating 0 to 200mA peak current and can accept a 0V to +5V digital input voltage range.Working Principle:The LTC1453IN8#PBF incorporates a Digital-to-Analog Conversion (DAC) circuit and a low-impedance, low-voltage, rail-to-rail output buffer. It is designed to provide precision current outputs from a single 5V power supply for controlling analog circuits. The device accepts an 8-bit digital word (D0–D7) input, which is then converted into a programmed current, through the DAC module. The output of the DAC is passed through a low gain amplifier, providing a low-impedance output drive.The maximum output current is determined by the external resistor value and is programmed by entering the appropriate binary code on the data inputs (D0–D7). The output current is adjusted by either increasing or decreasing the number of input data bits; a higher resolution can be achieved by increasing the number of bits. The actual output current is proportional to the sum of the bits that are set, so a higher number of bits enables a finer control over the output current. The output current returns to zero for a digital input of 11111111, which is the maximum resolution. The low-impedance output driver in the LTC1453IN8#PBF is capable of driving a range of loads, from 2Ω to 20kΩ. It is designed for DC signals that require low power dissipation. The device comes with signal integrity and slew rate control features for optimum signal processing, and it can be configured for a maximum rate of up to 320kHz.The device also provides a patented complementary bipolar sinusoidal tracking signal with a peak amplitude of 200mA and a programmable slew rate. The signal is useful in applications that require an accurate, low-distortion, sinusoidal signal output. The sinusoidal tracking output is switchable and can be disabled when not required.In summary, the LTC1453IN8#PBF is a 8-bit, high-speed current steering DAC that is capable of producing scalable peak current outputs of 200mA. It has a low-impedance output driver and includes a patented complementary bipolar sinusoidal tracking signal which can be used in applications that require a low-distortion sinusoidal signal output. It is a reliable and cost-effective solution for general-purpose DACs, feedback loops, and low-power analog-to-digital (A/D) conversion applications.

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