AD9838ACPZ-RL7

Overview

The AD9838ACPZ-RL7 is a low-power Direct Digital Synthesis (DDS) device manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.3 V to 5.5 V and consumes only 11 mW at 2.3 V. The device features a 10-bit DAC with an update rate of up to 16 MSPS for the B grade, producing high-performance sinusoidal and triangular outputs up to 8 MHz. It includes a 28-bit phase accumulator, two frequency registers, and two phase registers. The component utilizes a 3-wire serial interface compatible with DSP standards and incorporates an onboard comparator for square wave generation. It is housed in a 20-lead LFCSP package and supports an extended operating temperature range from -40°C to +125°C.

Feature Summary

• Integrated direct digital synthesis architecture capable of generating sine and triangular waveforms with programmable frequency and phase modulation.
• Onboard comparator allows conversion of analog output into a square wave suitable for clock generation applications.
• Independent analog and digital power supplies enable flexible voltage configurations while maintaining low power consumption.
• Serial interface supports high-speed data loading and register control via standard communication protocols.

Applications

• Frequency stimulus and waveform generation
• Low power RF and communications systems
• Liquid and gas flow measurement
• Sensor applications including proximity, motion, and defect detection
• Test and medical equipment

Procurement Notes

Verify the specific grade (A or B) required for your application, as the master part number covers both variants with different maximum clock speeds. Confirm that the LFCSP-20 package matches your PCB footprint design. Ensure that the serial interface timing requirements align with your microcontroller or DSP controller specifications before finalizing the order.

Selection Notes

Select this component when a compact, low-power DDS solution is needed for battery-operated devices. Choose the B grade variant if system performance requires a master clock speed up to 16 MHz. Consider the A grade if lower clock speeds are sufficient for the target application. Verify that the external load resistance and decoupling capacitor values meet the datasheet recommendations for optimal signal integrity.

Part Context

This component belongs to the AD9838 series of Direct Digital Synthesis ICs from Analog Devices. It is designed as a cost-effective alternative to higher-power DDS solutions, offering significant size and power reductions compared to previous generations. The device integrates essential DDS functions into a small form factor, making it suitable for space-constrained industrial and consumer electronics designs requiring precise frequency control.

Replacement Considerations

The AD9837 is a related device in the same family with similar functionality but potentially different pin counts or power characteristics. Verify pin compatibility and electrical specifications before substituting. No other direct cross-model replacements are confirmed in the provided documentation.