AD9833BRUZ - 25MHz Low Power DDS | Analog Devices
MPN: AD9833BRUZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.8 | $8.80 |
| 10 | $8.1 | $81.00 |
| 100 | $7.2 | $720.00 |
| 500 | $6.5 | $3,250.00 |
| 1,000 | $5.9 | $5,900.00 |
AD9833BRUZ Overview
Direct Digital Synthesis (DDS) is a method of generating analog waveforms digitally by accumulating phase increments and mapping them through a lookup table to produce sine, triangular, or square wave outputs. DDS offers advantages over analog oscillators, including precise frequency tuning, fast frequency hopping, and excellent phase continuity. The AD9833 is a member of the DDS family, which falls under the broader category of signal generation ICs used in test equipment, communication systems, and sensor excitation.
Key features of the AD9833BRUZ include a 28-bit frequency register providing 0.1 Hz resolution at 25 MHz clock, a 10-bit DAC for amplitude control, and a power-down mode that reduces current consumption to 0.5 mA typical. The device supports both SPI and Microwire serial interfaces, making it easy to interface with microcontrollers. The narrowband SFDR is typically 72 dB, ensuring clean output spectra for frequency synthesis applications.
The AD9833 uses a CMOS process, which contributes to its low power consumption of 20 mW at 3V. The internal architecture includes a phase accumulator that can be programmed for frequency and phase modulation, enabling applications such as FSK and PSK. The device also features a reset pin for initialization and a control register for configuring output waveform and power-down modes.
Typical applications include frequency excitation for impedance measurements, signal generation for test equipment, and waveform generation for portable instrumentation. The low power and small package make it ideal for battery-powered devices. When designing with the AD9833, ensure proper decoupling on the power supply and use a clean clock source to achieve optimal SFDR performance.
Drop-in alternatives for AD9833BRUZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD9833BRUZ (same form factor and footprint) — differing in DAC Resolution, Frequency Resolution, Operating Temperature Range, Package, Power Consumption.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD9833BRMZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD9832BRUZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD9834BRUZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX9833
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD9833BRU
✅ Drop-In📋 Reference alternative (not in catalog)
AD9833BRUZ Specifications
| Supply Voltage | 2.5 V to 5.5 V |
| Maximum Clock Frequency | 25 MHz |
| Output Waveforms | Sine, Triangular, Square |
| DAC Resolution | 10 bit |
| Frequency Register Width | 28 bit |
| Frequency Resolution | 0.1 Hz at 25 MHz |
| Narrowband SFDR | 72 dB typical |
| Power Consumption | 20 mW at 3 V |
| Power-Down Current | 0.5 mA typical |
| Serial Interface | SPI / Microwire |
| Package | 10-pin MSOP (RM-10) |
| Operating Temperature Range | -40C to +105C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
AD9833BRUZ Pin Configuration
| Pin 1 | VCC — Power supply (2.5V to 5.5V) |
| Pin 2 | GND — Ground |
| Pin 3 | SCLK — Serial clock input |
| Pin 4 | SDATA — Serial data input |
| Pin 5 | FSYNC — Frame synchronization input |
| Pin 6 | AGND — Analog ground |
| Pin 7 | VOUT — Analog output |
| Pin 8 | CAP/2.5V — Internal reference decoupling |
| Pin 9 | RESET — Reset input |
| Pin 10 | PSEL — Phase select input |
Typical Applications
AD9833BRUZ is suitable for 6 applications: Frequency Excitation for Impedance Measurement, Signal Generation for Test Equipment, Waveform Generation for Portable Instrumentation, Frequency Hopping for Communication Systems, Sensor Excitation for Time Domain Reflectometry, Audio Tone Generation.
Frequency Excitation for Impedance Measurement
The AD9833BRUZ generates precise sine waves for impedance spectroscopy and network analysis. Its 28-bit frequency resolution allows fine frequency steps, and the low power consumption suits portable instruments. The device's SPI interface simplifies integration with microcontrollers, enabling automated frequency sweeps. The 10-bit DAC provides adequate amplitude control for most measurement applications.
Recommended
Signal Generation for Test Equipment
The AD9833BRUZ is ideal for bench-top and portable signal generators, providing sine, triangular, and square wave outputs up to 12.5 MHz (half the clock). Its low power consumption (20 mW at 3V) extends battery life in field instruments. The device's fast frequency hopping enables swept-frequency measurements. The small MSOP package saves board space in compact designs.
Recommended
Waveform Generation for Portable Instrumentation
The AD9833BRUZ is well-suited for portable devices requiring programmable waveforms, such as handheld signal generators and sensor excitation. Its 2.5V to 5.5V supply range allows operation from a single lithium cell. The power-down mode reduces current to 0.5 mA, preserving battery life. The SPI interface is compatible with most microcontrollers, simplifying firmware development.
Recommended
Frequency Hopping for Communication Systems
The AD9833BRUZ supports fast frequency hopping, making it suitable for FSK and PSK modulation in communication systems. Its 28-bit frequency register allows precise carrier frequencies, and the phase accumulator enables continuous phase modulation. The device's low power consumption is beneficial for battery-operated transceivers. The serial interface allows easy control from a baseband processor.
Recommended
Sensor Excitation for Time Domain Reflectometry
The AD9833BRUZ can generate excitation signals for time domain reflectometry (TDR) applications, where precise frequency control is essential. Its low power consumption and small package make it suitable for embedded TDR systems. The device's ability to produce square waves enables pulse generation for TDR. The SPI interface allows integration with data acquisition systems.
Recommended
Audio Tone Generation
The AD9833BRUZ can generate audio-frequency tones for alarms, notifications, or test signals. Its 28-bit frequency resolution allows precise tuning, and the sine output provides low-distortion tones. The device's low power consumption is ideal for battery-powered audio devices. The square wave output can be used for digital audio signals.
Recommended
Recommended Products Summary
Engineering reference data for AD9833BRUZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD9833BRMZ | AD9832BRUZ | AD9834BRUZ |
|---|---|---|---|---|
| Package | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 75 MHz |
| Interface | Serial (SPI) | Serial (SPI) | Parallel | Serial (SPI) |
| DAC Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Frequency Resolution | 0.1 Hz | 0.1 Hz | 0.1 Hz | 0.1 Hz |
| Power Consumption | 20 mW at 3V | 20 mW at 3V | 20 mW at 3V | 25 mW at 3V |
| Supply Voltage | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V |
Key Differentiators
- Low power consumption of 20 mW at 3V (vs AD9834BRUZ)
- Serial interface simplifies wiring (vs AD9832BRUZ)
- Wide supply voltage range (vs MAX9833)
Design Notes
The AD9833BRUZ operates from 2.5V to 5.5V. Use a clean power supply and place a 0.1uF decoupling capacitor close to the VCC pin. For optimal performance, a 10uF capacitor may be added in parallel for low-frequency noise filtering. Ensure the supply voltage is within the specified range to avoid damage.
For best signal integrity, keep the serial interface lines (SCLK, SDATA, FSYNC) short and avoid routing them near high-speed digital signals. Use ground planes to minimize noise coupling. The analog output (VOUT) should be routed away from digital traces to reduce interference.
Ensure the FSYNC signal is properly synchronized with SCLK to avoid data corruption. The AD9833 requires a valid reset sequence after power-up. Also, the CAP/2.5V pin must be decoupled with a 10nF capacitor to ground for internal reference stability. Refer to the datasheet for detailed programming instructions.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
