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Analog Devices Inc. AD9832BRU-REEL
- Part No.:
- AD9832BRU-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Direct Digital Synthesis (DDS)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD9832BRU-REEL.pdf
- Description:
- IC DDS 25MHZ 10BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,383
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Product details
Overview
AD9832BRU-REEL from Analog Devices is a 25 MHz direct digital synthesizer (DDS) IC integrating a 32-bit phase accumulator, on-chip 12-bit sine lookup table, and 10-bit current-output DAC in a single CMOS device. It delivers digitally programmable sine-wave outputs up to 12.5 MHz with frequency resolution of 1 part in 4 billion, supports frequency/phase modulation via serial register loading, and operates across −40°C to +85°C for industrial waveform generation.
For engineers reviewing the AD9832BRU-REEL datasheet, AD9832BRU-REEL pinout, AD9832BRU-REEL application, or AD9832BRU-REEL equivalent, key selection considerations include its 16-lead TSSOP package, 25 MSPS DAC update rate, 50 dB SNR at 1 MHz output, narrowband SFDR of −72 dBc, and serial interface timing compliance with 16 ns minimum SCLK high/low duration.
Technical Context
The AD9832BRU-REEL implements a fully digital NCO architecture with a 32-bit phase accumulator scaled to 232 = 2π, enabling continuous-phase frequency switching without glitches. Its 12-bit truncated phase output addresses a sine ROM LUT, feeding a high-impedance 10-bit current DAC whose full-scale output is adjustable via external RSET (3.9 kΩ typical).
Modulation is executed entirely in the digital domain: frequency selection between FREQ0/FREQ1 registers is controlled by either the FSELECT pin or internal control bit, while four 12-bit PHASEx registers enable precise phase offset addition prior to LUT addressing-supporting both frequency and phase modulation without analog circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Clock Rate | 25 MHz MCLK - sets maximum output frequency (≤12.5 MHz) and determines frequency resolution (1/2³² × fMCLK) |
| DAC Resolution | 10-bit - defines quantization step size and theoretical SNR limit of 61.96 dB |
| Output Type | High-impedance current source (IOUT) - requires external load resistor; full-scale current = 12.5 × VREFIN/RSET |
| SNR | 50 dB min at fOUT = 1 MHz, fMCLK = 25 MHz - indicates usable dynamic range for baseband signal synthesis |
| Narrowband SFDR | −72 dBc min (±50 kHz) at 5 V - specifies largest spur amplitude relative to fundamental in critical tuning bandwidth |
| Power-Down Current | 5 mW at 5 V - reduces active power from 200 mW to enable low-duty-cycle operation in battery-sensitive systems |
| Operating Temp | −40°C to +85°C - validated for industrial environments without derating |
Pinout & Package
AD9832BRU-REEL is housed in a 16-lead Thin Shrink Small Outline Package (TSSOP), thermally rated at θJA = 158°C/W, with exposed pad not electrically connected per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FS ADJUST (1) | Full-scale current calibration | Connects external RSET (3.9 kΩ typical) to AGND to set IOUT full-scale = 12.5 × VREFIN/RSET; enables load- and supply-voltage compensation |
| REFIN (2) | Reference voltage input | Accepts internal 1.21 V reference (from REFOUT) or external precision reference; determines DAC scaling accuracy and temperature drift |
| REFOUT (3) | On-chip reference output | Provides 1.21 V ±7% nominal reference; must be decoupled with 10 nF capacitor to AGND for stability |
| DVDD (4) | Digital supply rail | 3.3 V or 5 V ±10%; powers logic, serial interface, and control registers; requires 0.1 µF decoupling to DGND |
| DGND (5) | Digital ground return | Separate ground plane from AGND to prevent digital noise coupling into analog output path |
| MCLK (6) | Main clock input | Drives phase accumulator; output frequency accuracy and phase noise directly scale with MCLK stability and jitter |
| SCLK (7) | Serial clock input | Falling-edge–triggered clock for 16-bit serial data transfer; minimum 16 ns high/low pulse width required |
| SDATA (8) | Serial data input | Loads 16-bit words (register address + data) into internal shift register; MSB-first protocol |
| FSYNC (9) | Frame synchronization | Active-low signal framing each 16-bit write; must go high after exactly 16 SCLK falling edges |
| FSELECT (10) | Frequency register select | Hardware-selects between FREQ0/FREQ1 registers on rising MCLK edge; avoids software latency in real-time frequency hopping |
| PSEL0/PSEL1 (11–12) | Phase register select | Two-pin binary encoding selects one of four 12-bit PHASEx registers for phase modulation; sampled on rising MCLK edge |
| AGND (13) | Analog ground return | Isolated ground for DAC, reference, and analog output; must be tied to system analog ground at single point |
| IOUT (14) | Current output | High-Z current source; requires external load resistor to AGND to convert to voltage; max compliance = 1.35 V at 3 V supply |
| AVDD (15) | Analog supply rail | 3.3 V or 5 V ±10%; powers DAC, reference, and analog circuitry; requires 0.1 µF decoupling to AGND |
| COMP (16) | Reference amplifier compensation | Connects 10 nF ceramic capacitor to AVDD to stabilize internal reference amplifier loop response |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 32-bit NCO + 12-bit sine LUT | Enables continuous-phase frequency switching and eliminates need for external ROM or microcontroller-based waveform tables |
| Programmable full-scale current via RSET | Allows optimization of output amplitude and power consumption for specific load impedance and supply voltage (3.3 V or 5 V) |
| Hardware FSELECT and PSEL pins | Supports real-time, glitch-free frequency and phase register switching without CPU intervention or serial bus latency |
| 5 mW power-down mode | Reduces total supply current to 350 µA, enabling use in low-duty-cycle sensor excitation or portable test equipment |
| On-chip 1.21 V reference with 100 ppm/°C TC | Eliminates external reference component while maintaining <±0.1% gain error over −40°C to +85°C |
Applications
| Liquid Flow Measurement | Proximity Sensing |
|---|---|
Use Scenario: Ultrasonic time-of-flight flow meters use precise sine-wave excitation at 1–5 MHz to drive transducers and measure transit-time differences. IC Role / Device Role / Timing Role: AD9832BRU-REEL generates stable, digitally tunable excitation signals; its 25 MHz MCLK tolerance and −72 dBc narrowband SFDR ensure clean spectral purity for accurate echo detection. Use Value: Enables sub-millisecond transit-time resolution without external filtering; hardware FSELECT allows rapid frequency sweeps for multi-point calibration. | Use Scenario: Capacitive proximity sensors modulate excitation frequency to detect object distance based on capacitance-induced resonance shifts. IC Role / Device Role / Timing Role: AD9832BRU-REEL serves as programmable oscillator core; its 32-bit frequency word provides 0.006 Hz resolution at 1 MHz output for fine-grained distance discrimination. Use Value: On-chip phase modulation (via PHASEx registers) supports differential sensing schemes; 5 mW power-down extends battery life in handheld detectors. |
| RF Communications Test | Medical Ultrasound Calibration |
Use Scenario: Benchtop RF signal sources require agile, low-spur tone generation for receiver sensitivity and adjacent-channel rejection testing. IC Role / Device Role / Timing Role: AD9832BRU-REEL functions as compact DDS engine; its serial interface allows microcontroller-based frequency hopping synchronized to external triggers. Use Value: −50 dBc wideband SFDR (±2 MHz) ensures spurs remain below measurement floor; 16-lead TSSOP simplifies integration into compact PCB layouts. | Use Scenario: Portable ultrasound calibrators generate known-frequency acoustic pulses to verify transducer response and beam alignment. IC Role / Device Role / Timing Role: AD9832BRU-REEL supplies calibrated 2–10 MHz sine-wave stimuli; its 50 dB SNR and 1.35 V output compliance meet clinical-grade signal fidelity requirements. Use Value: Internal 1.21 V reference eliminates calibration drift vs. external references; wake-up time ≤1 ms enables responsive user-triggered pulse generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar direct digital synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9833BRUZ-REEL | Same 25 MHz DDS core but includes integrated 200 MHz PLL clock multiplier; no external crystal required; 10-bit DAC retained | Eliminates need for high-frequency external clock source; better suited for systems where MCLK >25 MHz is unavailable | Select AD9833BRUZ-REEL when board space is constrained and clock generation flexibility is prioritized over minimal BOM count |
| AD9834BRUZ-REEL | Integrates 2.5 V internal reference (vs. 1.21 V); adds SPI-compatible 3-wire serial interface; retains 10-bit DAC and 25 MHz MCLK support | Improved compatibility with 2.5 V logic systems; simplified interface reduces GPIO count vs. AD9832BRU-REEL's 4-wire requirement | Choose AD9834BRUZ-REEL for new designs targeting lower-voltage digital domains and reduced firmware complexity |
Compared with AD9832BRU-REEL, AD9833BRUZ-REEL trades external clock dependency for higher integration and AD9834BRUZ-REEL replaces the 1.21 V reference and 4-wire interface with a 2.5 V reference and streamlined SPI-both retain identical DDS architecture and modulation capability but address distinct system-level constraints.
Availability
AD9832BRU-REEL is available at Aetrix Electronics and suitable for liquid flow measurement, proximity sensing, RF communications test, and medical ultrasound calibration requiring stable component supply and guaranteed long-term industrial temperature operation.
Supply support for AD9832BRU-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD9832BRU-REEL belongs to Analog Devices' Direct Digital Synthesis (DDS) product line, engineered for applications demanding precise, programmable, low-spur waveform generation without analog VCOs or PLLs-targeting test equipment, sensor excitation, and communications infrastructure.
FAQ
What is the maximum output frequency achievable with the AD9832BRU-REEL?
The AD9832BRU-REEL supports an output frequency range up to half the master clock frequency (fMCLK/2). With its rated 25 MHz MCLK, the maximum fundamental output frequency is 12.5 MHz. This limit arises from Nyquist sampling constraints applied to the 10-bit DAC output stage. The AD9832BRU-REEL maintains spectral integrity up to this limit, as confirmed by typical performance curves showing SFDR degradation beyond 12.5 MHz.
Does the AD9832BRU-REEL require an external crystal or can it operate with a CMOS clock input?
The AD9832BRU-REEL accepts a CMOS-compatible square-wave clock directly on the MCLK pin-it does not require or integrate a crystal oscillator. The datasheet specifies MCLK as a digital clock input with defined timing parameters (e.g., 16 ns minimum high/low time), and all performance specifications assume a clean, low-jitter external clock source. No crystal or resonator is needed, simplifying layout and reducing BOM count.
How is full-scale output current adjusted on the AD9832BRU-REEL?
Full-scale output current on the AD9832BRU-REEL is set by an external resistor (RSET) connected between the FS ADJUST pin (Pin 1) and AGND. The relationship is IOUT-FS = 12.5 × VREFIN/RSET, where VREFIN is nominally 1.21 V. With the typical 3.9 kΩ RSET, full-scale current is 3.9 mA. Adjusting RSET scales output amplitude linearly while preserving DAC linearity within datasheet limits.
Can the AD9832BRU-REEL perform simultaneous frequency and phase modulation?
Yes, the AD9832BRU-REEL supports concurrent frequency and phase modulation. Frequency modulation is achieved by loading values into FREQ0/FREQ1 registers and toggling FSELECT; phase modulation is implemented by writing offsets to any of the four 12-bit PHASEx registers and selecting them via PSEL0/PSEL1. Both operations occur in the digital domain before the sine LUT, enabling independent, real-time control without analog components or external circuitry.
What is the wake-up time from power-down mode for the AD9832BRU-REEL?
The AD9832BRU-REEL wake-up time from power-down mode is 1 ms typical at 5 V and 25°C, as specified in the datasheet. At lower supply voltages (e.g., 2.97 V) and colder temperatures (−40°C), wake-up time increases to approximately 10 ms, as shown in Figure 13. For applications requiring faster wake-up under marginal conditions, the datasheet recommends using an external reference instead of the internal one to improve settling behavior.
AD9832BRU-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Resolution (Bits):
- 10 b
- Master fclk:
- 25 MHz
- Tuning Word Width (Bits):
- 32 b
- Voltage - Supply:
- 2.97V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
AD9832BRU-REEL FAQ
1.How can I place an order for AD9832BRU-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9832BRU-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD9832BRU-REEL reliable?
The price and inventory of AD9832BRU-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9832BRU-REEL is usually 5 days.
3.What payment methods are accepted for AD9832BRU-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9832BRU-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9832BRU-REEL?
AD9832BRU-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9832BRU-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD9832BRU-REEL?
For technical support, including AD9832BRU-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9832BRU-REEL requirements.
6.How does Aetrix verify that AD9832BRU-REEL is sourced from the original manufacturer or authorized distributors?
All AD9832BRU-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9832BRU-REEL meets industry standards.
7.What is the process for return or replacement of AD9832BRU-REEL?
All AD9832BRU-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD9832BRU-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD9832BRU-REEL part is unused and in its original packaging.
Return procedure for AD9832BRU-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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