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.

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Comparable Parts Click to see all in Parametric Search. Each of these subcircuits is discussed in the Circuit Description section. AVDD can have a value from 2. However, these are nonlinear and not easy to generate except through piecewise construction.

The phase accumulator in the AD is implemented with 28 bits. Similarly, there is a latency associated with each asynchronous write operation.

AD Datasheet(PDF) – Analog Devices

Status Status indicates the current lifecycle of the product. The output from the DAC can be filtered externally before being applied to the comparator input. For example, the analog section can be operated at 5 V, and the digital section can be operated at 3 V, or vice versa. When data is to be transmitted to the AD, P3. If the user wants to alter the entire contents of a frequency register, two consecutive writes to the same address must be performed because the frequency registers are 28 bits wide.

An Evaluation Board is a board engineered to show the a9d834 of the model, the part is included on the board. SCLK should idle high between the two write operations.

The relationship between RSET and the full-scale current is as follows: For more information about lead-free parts, please consult our Pb Lead free information page. Full data on the AD can be found in the AD data sheet available from Analog Devices and should be consulted in conjunction with this user guide when using the evaluation board.


No license is granted by implication as9834 otherwise under any patent or patent rights of Analog Devices. D Page 10 of 29 Temperature Range This is the acceptable operating range of the device.

The package for this IC i. Once an order has been placed, Analog Devices, Inc. NCOs inherently generate continuous phase signals, thus avoiding any output discontinuity when switching between frequencies. RESET resets appropriate internal registers to zero; this corresponds to an analog output of midscale. An example of a complete bit write is shown in Table This control bit allows the user to continuously load the MSBs or LSBs of a frequency register ignoring the remaining 14 bits.

The device operates with a power supply from 2. Model The model number is a datashret version of a generic that can be purchased or sampled.

Price Rohs Orders from Analog Devices. We do take orders for items that are not in stock, so delivery may be scheduled at a future date.

AD Datasheet and Product Info | Analog Devices

Similarly, with a 1 MHz clock rate, the AD can be tuned to 0. Product Lifecycle Production At least one model within this product family is in production and available for purchase. This is a stress rating only; functional operation of the device at these dagasheet any other conditions above those indicated in the operational section of this specification is not implied.

New frequency, phase, and control words can be dataxheet to the part when the SLEEP1 control bit is active. Avoid crossover of digital and analog signals.

This control bit indicates whether the 14 bits being loaded are being transferred to the 14 MSBs or 14 LSBs of the addressed frequency register. This square wave can also be divided by two before being output.

The accumulator simply scales the range of phase numbers into a multibit digital word. The wideband SFDR gives the magnitude of the largest harmonic or spur relative to the magnitude of the fundamental frequency in the 0 to Nyquist bandwidth. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use.


The parts of the chip that can be powered down are the internal clock and the DAC. Transit times from these sites may vary. Phase Offset Register 1. Both of these supplies can have a value of 2.

Pin Count Pin Count is the number of pins, balls, or pads on the device. Table 6 describes the individual bits of the control register. A simple DDS chip can implement this equation with three major subcircuits: This bit must always be set to 0. The part can be used to perform simple modulation such as FSK. Consuming only 20 mW of power at 3 V makes the AD an ideal candidate for power-sensitive applications. The power supply lines to the AD should use as large a track as possible to provide low impedance paths and reduce the effects of glitches on the power supply line.

Because of the various output options available from the part, the AD can be configured to suit a wide variety of applications.

20 mW Power, 2.3 V to 5.5 V, AD9834 Data Sheet

This pin must be enabled before use. In this technique, the component side of the board is dedicated to ground planes and signals are placed on the other side. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards.

B Changes to Vatasheet Section