AD9837ACPZ-RL7

Overview

The AD9837ACPZ-RL7 is a low-power, programmable waveform generator from Analog Devices. It produces sine, triangular, and square wave outputs with digitally programmable frequency and phase. The device features a 28-bit resolution, achieving 0.06 Hz resolution at a 16 MHz reference clock or 0.02 Hz at 5 MHz. It operates on a 2.3 V to 5.5 V supply with 8.5 mW power consumption at 2.3 V. The MCLK speed is 16 MHz for the B grade and 5 MHz for the A grade. Communication is handled via a 3-wire SPI interface compatible with DSP standards. It includes a power-down option and operates within an extended temperature range of −40°C to +125°C in a 10-lead LFCSP package.

Feature Summary

• Digitally programmable frequency and phase control
• Low power consumption with dedicated sleep modes
• Integrated 10-bit DAC with onboard regulator

Applications

• Frequency stimulus and waveform generation
• Liquid and gas flow measurement
• Sensory applications including proximity, motion, and defect detection
• Time domain reflectometry (TDR) applications

Procurement Notes

Verify the specific grade (A or B) required for your application, as the MCLK speed differs between grades. Confirm the ordering suffix matches the desired tape and reel quantity. Ensure the design supports the 10-lead LFCSP_WD package dimensions and thermal requirements. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component for applications requiring precise waveform generation with minimal power usage. Consider the A grade if lower clock speeds are sufficient, or the B grade for higher performance up to 16 MHz. Ensure the system can accommodate the 3-wire SPI interface timing constraints. Evaluate the need for external filtering based on the Nyquist sampling theorem requirements for aliased images.

Part Context

This part belongs to the AD9837 series of direct digital synthesis (DDS) waveform generators. It is designed for embedded systems where cost, size, and power efficiency are critical. The device integrates a numerically controlled oscillator, SIN ROM, and DAC, eliminating the need for external operational amplifiers or complex filtering circuits in many standard configurations.

Replacement Considerations

AD9837BCPZ-RL7

FAQ

How does the AD9837 handle power consumption when not generating waveforms?

The AD9837 includes a power-down (sleep) function that allows sections of the device, such as the DAC or internal MCLK, to be powered down individually to minimize current consumption.

What is the maximum output voltage swing of the AD9837?

The typical peak-to-peak output voltage (Vp-p) is 0.610 V, with a maximum of 0.645 V and a minimum of 37 mV, depending on the load and supply conditions.

Can the AD9837 generate square waves directly?

Yes, the AD9837 can produce sinusoidal, triangular, and square wave outputs. The square wave is generated by taking the most significant bit (MSB) of the DAC data.