AD9830ASTZ-REEL

Overview

The AD9830ASTZ-REEL is a Direct Digital Synthesis (DDS) integrated circuit manufactured by Analog Devices Inc. It operates on a single +5 V power supply and supports clock rates up to 50 MHz. The device integrates a 32-bit phase accumulator, an on-chip sine look-up table, and a 10-bit digital-to-analog converter (DAC). It features a parallel microprocessor interface for data loading and includes four 12-bit phase registers. Key electrical specifications include a minimum signal-to-noise ratio of 50 dB, a spurious-free dynamic range of 72 dB, and a typical power consumption of 250 mW. The component is housed in a 48-pin LQFP package.

Feature Summary

• Integrates a numerically controlled oscillator with a 32-bit phase accumulator and a built-in sine look-up table.
• Includes a high-impedance current source 10-bit DAC with adjustable full-scale output via an external resistor.
• Supports direct digital synthesis modulation capabilities including frequency modulation and phase shift keying.
• Features a low-power sleep mode that disables internal clocks and DAC current sources.

Applications

• Direct Digital Synthesis tuning
• Digital demodulation
• Mobile communication local oscillators

Procurement Notes

Verify the specific suffix REEL against the manufacturer's official documentation to confirm reel packaging specifications. Ensure compatibility with the required 48-pin LQFP footprint during procurement planning. Confirm RoHS compliance status through the latest environmental declaration provided by Analog Devices Inc. prior to finalizing orders.

Selection Notes

Select this component when a parallel interface is preferred over serial alternatives within the AD983x family. The 48-pin QFP package requires adequate board space compared to smaller packages like MSOP or TSSOP found in other variants. Consider the 50 MHz maximum clock speed and 10-bit resolution requirements for the target application design.

Part Context

This part belongs to the AD9830 series of Direct Digital Synthesis devices from Analog Devices Inc. It is distinct from other family members such as the AD9833 or AD9834 due to its parallel interface architecture and larger pin count. The AD9830 provides a fully integrated solution for generating precise analog waveforms from a digital clock reference.

Replacement Considerations

Public confirmed substitute part numbers are not available in the verified documentation.

FAQ

How is the full-scale output current of the DAC adjusted?

The full-scale output current is determined by connecting an external resistor (RSET) between the FS ADJUST pin and AGND. The relationship is defined by IOUTFULL-SCALE = 16 * VREFIN / RSET.

What is the purpose of the SLEEP pin?

The SLEEP pin is a low-power control input. When asserted low, it puts the AD9830 into a low-power mode by disabling internal clocks and turning off the DAC's current sources and REFOUT.

How does the device handle frequency selection?

The FSELECT input controls which frequency register (FREQ0 or FREQ1) is used in the phase accumulator. This input is sampled on the rising edge of the MCLK signal.