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Name: DAC5674IPHP
Brand: Texas Instruments
SKU: DAC5674IPHP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments DAC5674IPHP

Part No.:: DAC5674IPHP

Manufacturer:: Texas Instruments

Package:: 48-PowerTQFP

Datasheet:: DAC5674IPHP.pdf

Description:: IC DAC 14BIT A-OUT 48HTQFP

In Stock:: 249

Quantity:: Add To Cart

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DAC5674IPHP Specifications

Package/Case:
48-PowerTQFP
Packaging:
Tray
Series:
CommsDAC™
ProductStatus:
Active
NumberofBits:
14
NumberofD/AConverters:
1
SettlingTime:
20ns (Typ)
OutputType:
Current - Unbuffered
DifferentialOutput:
Yes
DataInterface:
Parallel
ReferenceType:
External, Internal
Voltage-SupplyAnalog:
3V ~ 3.6V
Voltage-SupplyDigital:
1.65V ~ 1.95V
INL/DNL(LSB):
±3.5 (Max), ±2 (Max)
Architecture:
Current Source
OperatingTemperature:
-55°C ~ 125°C

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DAC5674IPHP information

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DAC5674IPHP Typical application Circuitry

DAC5674IPHP

The DAC5674IPHP is a high-performance, 14-bit, 400 MSPS (Mega Samples Per Second) digital-to-analog converter (DAC) designed by Texas Instruments. This chip is optimized for applications requiring high-speed data conversion, accurate signal reproduction, and efficient integration into digital signal processing systems. Its applications span across telecommunications, radar systems, test and measurement equipment, and broadband data systems, where its high-speed performance and signal quality are of paramount importance.

Key Features and Parameters:

- 14-Bit Resolution: Offers high precision in digital-to-analog conversion, enabling the generation of highly accurate analog output signals.

- 400 MSPS Sampling Rate: Facilitates the generation of high-frequency analog signals, suitable for advanced digital communication systems.

- Dual Data Ports with DDR (Double Data Rate) Support: Allows for high-speed data input, doubling the effective input data rate.

- Selectable 2x, 4x Interpolation Filters: These built-in filters reduce the requirements for external filtering and simplify the system design by allowing for lower input data rates.

- Single 3.3V Supply Operation: Ensures compatibility with modern digital systems and simplifies power supply design.

Application Scenario: Implementing the DAC5674IPHP in a direct RF synthesis system for a communication transmitter showcases its ability to provide high-fidelity signal generation essential for broadband communication systems. This application emphasizes the DAC's capability to handle complex modulation schemes and generate signals directly at RF frequencies, eliminating the need for additional up-conversion stages.

Circuit Design:

The integration of the DAC5674IPHP into a direct RF synthesis system requires meticulous attention to several critical connections and design considerations:

1. Digital Input Ports (D[13:0]A, D[13:0]B, Pins 5-18, 33-46): These pins receive the parallel digital input data. For optimal performance, the data lines should be impedance matched and routed with minimal length and equal propagation delay to prevent signal skewing.

2. Clock Input (CLK, Pin 4): A high-purity, low-jitter clock source is connected here to synchronize data sampling. The quality of this clock signal is crucial, as it directly affects the output signal's integrity and spectral purity.

3. Data Clock Input (DCI, Pin 3): This pin receives the data clock, which is used for timing the input data. The data clock and the main clock must be synchronized to ensure proper data handling and to maximize the performance of the DAC's internal circuits.

4. Interpolation Filter Selection (FMT0, FMT1, Pins 47, 48): These pins configure the internal interpolation filters (2x, 4x, or bypass). Proper selection based on the input data rate can significantly improve the output signal quality by reducing aliasing and enabling higher output frequencies.

5. Analog Output (IOUTA, IOUTB, Pins 27, 28): The differential analog output is connected to a low-pass filter to attenuate unwanted spectral components before being used in the RF stage. This filtering is critical to comply with spectral emission requirements.

6. Power Supply and Grounding (AVDD, DVDD, AGND, DGND, Pins 1, 2, 19-26, 29-32): Ensuring clean and stable power supplies is essential, with separate analog and digital grounds to minimize noise coupling. Decoupling capacitors should be placed close to the power pins to filter out high-frequency noise.

Design Considerations:

- Signal Integrity: Maintaining the integrity of high-speed digital signals requires careful PCB layout, including controlled impedance traces, minimal trace lengths, and differential signaling where possible.

- Thermal Management: The DAC5674IPHP can generate significant heat at high operation rates, necessitating adequate heat sinking or airflow to maintain thermal stability.

- Power Supply Noise: Low-noise, stable power supplies are crucial to prevent degradation of the DAC's performance. Switching noise should be minimized through filtering and proper decoupling.

- Clock Purity: The spectral purity of the clock source has a direct impact on the output signal quality. A phase-locked loop (PLL) with low phase noise characteristics is recommended for generating the DAC clock.

By adhering to these design principles, the DAC5674IPHP can be effectively integrated into a direct RF synthesis system for a communication transmitter, demonstrating its high-speed, high-fidelity signal generation capabilities. This application underlines the DAC5674IPHP's suitability for advanced communication systems, where its performance can significantly enhance signal quality and system reliability.

DAC5674IPHP FAQ

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6. What is the process for return or replacement of DAC5674IPHP?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the DAC5674IPHP we delivered, we will accept the replacement or return of the DAC5674IPHP only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of DAC5674IPHP.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations