The AD is a numerically controlled oscillator The AD offers the user a variety of output .. may not meet the specifications listed in the data sheet. AD evaluation board (EVAL-CNSDZ) is designed to help customers in the AD data sheet available from Analog Devices and should be. Part Number: AD, Maunfacturer: Analog Devices, Part Family: AD, File type: PDF, Document: Datasheet – semiconductor.
|Published (Last):||17 January 2010|
|PDF File Size:||9.7 Mb|
|ePub File Size:||17.26 Mb|
|Price:||Free* [*Free Regsitration Required]|
One of the areas where the AD is suitable is in modulation applications. When FSYNC is taken low, the internal logic is informed that a new word is being loaded into the device. It also has an on-board comparator that allows a square wave datadheet be produced for clock daatasheet. The digital implementation is no different. In this aad9834, the output is no longer sinusoidal. Following the NCO, a phase offset can be added to perform phase modulation using the bit phase registers.
The device operates with a power supply from 2. Operating temperature range is as follows: The parts of the chip that can be powered down are the internal clock and the DAC. It is recommended that the data on these pins does not change within a time window of the falling edge of MCLK see Figure 4 for timing.
AVDD can have a value from 2. The first two bits of each bit word define the frequency register the word is loaded to and should, therefore, be the same for both of the datashet writes.
This is a high impedance current source. For specifications that do not specify a grade, the value applies to both grades.
The model has not been released to general production, but samples may be available. Temperature Range This is the acceptable operating range of the device. Model Package Pins Temp. Price Rohs Orders from Analog Devices. Sine Wave The AD builds the output based on this simple equation. The load resistors can be any value required, as long as the full-scale voltage developed across it does not exceed the voltage compliance range.
NCOs inherently generate continuous phase signals, thus avoiding any output discontinuity when switching between frequencies.
International prices may vary due to local duties, taxes, fees and exchange rates. The frequency registers are 28 bits; with a 75 MHz clock rate, resolution of 0. The full-scale output current can be adjusted for optimum power and external load requirements using a single external resistor RSET.
Pricing displayed is based on 1-piece. Evaluation Boards Pricing displayed is based on 1-piece. Sections of the device that are zd9834 being used can be powered down to minimize the current consumption.
20 mW Power, V to V, AD Data Sheet
Temperature ranges may vary by model. This is accomplished by using the on-board self-biasing comparator that converts the sinusoidal signal of the DAC to a square wave. This control bit allows the user to continuously load the MSBs or LSBs of a frequency register ignoring the remaining 14 bits.
Consuming only 20 mW of power at 3 V makes the AD an ideal candidate for power-sensitive applications. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. The write to the frequency register occurs after both words have been loaded. The DAC can be powered down through hardware or software.
If a frequency sweep, or something similar, is required, it is recommended that users alternate between the two frequency registers. Similarly, there is a latency associated with each asynchronous write operation. A microstrip technique is by far the best, but it is not always possible with a double-sided board.
This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards. New frequency, phase, and control words can be written to the part when the SLEEP1 control bit is active. The chip requires one reference clock, one low precision resistor, and eight decoupling capacitors to provide digitally created sine waves up to Data is transmitted MSB first.
Output Compliance The output compliance refers to the maximum voltage that can be generated at the output of the DAC to meet the specifications.
20 mW Power, 2.3 V to 5.5 V, AD9834 Data Sheet
datashet The available outputs are a sinusoidal output or a triangle output. For example, the DAC can be powered down when a clock output is being generated. In this technique, the component side of the board is dedicated as9834 ground planes and signals are placed on the other side. D Changes to Table This can be one of 4 stages: This is the frame synchronization signal for the input data.
The different functions and the various output options from the AD are described in more detail in the Frequency and Phase Registers section. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards.
However, no responsibility is assumed by Analog Devices for its use, nor for xd9834 infringements of patents or other rights of third parties that may result from its use.
Software is available with the evaluation board, which allows the user to easily program the AD Transit times from these sites may vary. RESET does not affect any of the addressable registers. This is available on the Analog Devices website. The package for this IC i. AD 11 m W Power, 2.