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Analog Devices Inc. AD9834BRUZ-REEL
- Part No.:
- AD9834BRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Direct Digital Synthesis (DDS)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD9834BRUZ-REEL.pdf
- Description:
- IC DDS 50MHZ 10BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,596
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Product details
Overview
AD9834BRUZ-REEL from Analog Devices is a 75 MHz direct digital synthesis (DDS) IC generating high-fidelity sine and triangular waveforms with on-chip 10-bit DAC, integrated comparator for square-wave clock generation, and 3-wire SPI interface. It delivers narrow-band SFDR >72 dB, operates from 2.3 V to 5.5 V, consumes 20 mW at 3 V, and supports frequency/phase modulation in sensor excitation and RF stimulus applications.
For engineers reviewing the AD9834BRUZ-REEL datasheet, AD9834BRUZ-REEL pinout, AD9834BRUZ-REEL application, or AD9834BRUZ-REEL equivalent, key selection considerations include its 28-bit frequency resolution (0.28 Hz @ 75 MHz MCLK), dual-frequency/phase register switching via FSELECT/PSELECT pins, independent analog/digital power domains (AVDD/DVDD), low-power sleep mode (0.5–0.6 mA), and TSSOP-20 package compatibility with precision timing and modulation-critical designs.
Technical Context
The AD9834BRUZ-REEL implements a 28-bit phase accumulator driving a 16-entry SIN ROM and 10-bit current-output DAC, enabling precise digital waveform synthesis up to 37.5 MHz output. Its architecture supports real-time frequency and phase modulation by toggling between two 28-bit frequency registers (FREQ0/FREQ1) and two 12-bit phase registers (PHASE0/PHASE1) via hardware pins or control register bits.
It integrates an on-board 1.20 V reference (REFOUT), internal regulator for CAP/2.5V rail, and a comparator with 4 MHz high-pass cutoff and 10 pF input capacitance-enabling clean square-wave generation from filtered DAC outputs. The 3-wire SPI interface (FSYNC/SCLK/SDATA) operates up to 40 MHz and is compatible with DSP and microcontroller standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Frequency | 37.5 MHz - usable fundamental sine/triangle output before Nyquist limit with 75 MHz MCLK. |
| Narrow-Band SFDR | −67 dBc (min, C grade) - spurious suppression within ±200 kHz bandwidth, critical for spectral purity in sensing. |
| Frequency Resolution | 0.28 Hz @ 75 MHz MCLK - enables fine-grained tuning for precision flow metering or impedance spectroscopy. |
| Power Consumption | 20 mW @ 3 V - enables battery-powered portable test equipment and low-power IoT sensor nodes. |
| DAC Resolution | 10-bit - provides 1024-step amplitude control for programmable gain and offset calibration. |
| Supply Range | 2.3 V to 5.5 V - supports mixed-voltage systems with independent AVDD/DVDD rails (e.g., 5 V analog, 3.3 V digital). |
| Operating Temp | −40°C to +105°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
AD9834BRUZ-REEL is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad for thermal management. Pin functions are validated per Analog Devices datasheet Rev. D, Figure 6 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FS ADJUST) | Full-scale DAC current control | Connects external RSET (6.8 kΩ typical) to set IOUT full scale = 3.0 mA; enables output amplitude calibration. |
| 2 (REFOUT) | Internal voltage reference output | Provides stable 1.12–1.24 V reference (100 ppm/°C TC); used for biasing or external ADC reference. |
| 8 (MCLK) | Master clock input | Drives phase accumulator; output frequency accuracy and phase noise directly track MCLK stability and jitter. |
| 9 (FSELECT) | Hardware frequency register select | Switches between FREQ0/FREQ1 registers without SPI transaction; enables fast frequency hopping. |
| 10 (PSELECT) | Hardware phase register select | Switches between PHASE0/PHASE1 registers; supports real-time phase-shift keying (PSK) modulation. |
| 13–15 (SDATA/SCLK/FSYNC) | 3-wire SPI interface | Serial configuration port; FSYNC frame sync enables deterministic register loading for synchronized waveform updates. |
| 16 (SIGN BIT OUT) | Comparator or NCO MSB output | Selectable via OPBITEN/SIGN-PIB bits; delivers square wave (comparator) or bitstream (NCO) for clocking or diagnostics. |
| 19–20 (IOUT/IOUTB) | Differential current outputs | High-impedance current sources; require 200 Ω load to AGND for 0.6 V p-p sine output; support differential filtering. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip comparator | Generates low-jitter square wave (120 ps rms) from DAC output; eliminates need for external comparator in clock-generation applications. |
| Independent AVDD/DVDD rails | Allows analog section (AVDD) and digital section (DVDD) to operate at different voltages (e.g., 5 V/3.3 V), reducing noise coupling and simplifying mixed-signal PCB layout. |
| Power-down control (SLEEP) | Reduces total current to 0.5–0.6 mA by disabling DAC while keeping MCLK active-ideal for duty-cycled sensor excitation. |
| 28-bit frequency tuning word | Enables sub-Hz resolution (0.004 Hz @ 1 MHz MCLK); supports high-precision resonance tracking in ultrasonic or capacitive sensing. |
| Extended temperature range | −40°C to +105°C operation ensures reliability in industrial flow meters, automotive diagnostics, and outdoor medical devices. |
Applications
| Liquid Flow Measurement | Gas Flow Measurement |
|---|---|
Use Scenario: Ultrasonic time-of-flight (TOF) flow meter using dual transducers and precise frequency sweeps. IC Role / Device Role / Timing Role: AD9834BRUZ-REEL generates swept sine stimuli (1–5 MHz) and captures phase-shifted echoes; its 28-bit resolution enables sub-mL/min flow resolution. Use Value: Narrow-band SFDR >72 dB minimizes harmonic interference in echo detection; low 20 mW power extends battery life in portable meters. |
Use Scenario: Thermal mass flow sensor requiring stable, low-noise excitation of heater elements across wide temperature ranges. IC Role / Device Role / Timing Role: AD9834BRUZ-REEL supplies calibrated 10–100 kHz triangle waves to drive heater bridges; on-board REFOUT stabilizes measurement references. Use Value: Independent AVDD/DVDD rails isolate heater switching noise from analog sensing; −40°C to +105°C rating ensures field reliability. |
| Proximity Sensing | Medical Impedance Spectroscopy |
Use Scenario: Capacitive proximity detector in industrial HMI panels, detecting finger presence via capacitance shift at fixed frequency. IC Role / Device Role / Timing Role: AD9834BRUZ-REEL drives electrode at 100–500 kHz; SIGN BIT OUT delivers square wave to synchronous demodulator for phase-sensitive detection. Use Value: Hardware FSELECT/PSELECT pins enable rapid frequency/phase hopping to reject ambient EMI; 20-lead TSSOP fits compact front-panel layouts. |
Use Scenario: Portable bioimpedance analyzer measuring tissue conductivity across 1 kHz–1 MHz spectrum using multi-frequency excitation. IC Role / Device Role / Timing Role: AD9834BRUZ-REEL synthesizes precise frequency steps (e.g., 1 kHz, 10 kHz, 100 kHz) with <0.28 Hz resolution; IOUT/IOUTB feed differential current sources into patient interface. Use Value: 10-bit DAC resolution allows calibrated amplitude scaling per frequency; low THD (−56 dBc) ensures accurate magnitude/phase extraction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar direct digital synthesis applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9833BRUZ | 25 MHz max MCLK; no on-board comparator; 10-lead MSOP package; lower SFDR (−55 dBc narrow-band). | Suitable for cost-sensitive, lower-frequency (<12.5 MHz) stimulus where square-wave clock generation is handled externally. | Select AD9833BRUZ only when MCLK ≤25 MHz, comparator is unnecessary, and board space is constrained. |
| AD9837BCPZ-RL7 | 50 MHz MCLK; integrated 1.2 V reference; 10-lead LFCSP; no FSELECT/PSELECT pins; SPI-only register control. | Better for space-constrained, low-pin-count designs needing reference integration but lacking need for hardware-modulation pin control. | Choose AD9837BCPZ-RL7 when footprint and BOM count are prioritized over fast hardware-triggered frequency/phase switching. |
Compared with AD9834BRUZ-REEL, AD9833BRUZ trades modulation flexibility and spectral purity for smaller size and lower cost, while AD9837BCPZ-RL7 sacrifices pin-based register switching for ultra-compact packaging and integrated reference-making AD9834BRUZ-REEL the optimal choice for demanding, modulation-rich industrial sensing.
Availability
AD9834BRUZ-REEL is available at Aetrix Electronics and suitable for liquid/gas flow measurement, proximity/motion sensing, impedance spectroscopy, portable test equipment, and low-power RF stimulus applications requiring stable component supply and long-term manufacturability.
Supply support for AD9834BRUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design and manufacturing expertise spanning precision instrumentation, industrial automation, and communications.
The AD9834BRUZ-REEL belongs to Analog Devices' Direct Digital Synthesis (DDS) product line, engineered specifically for high-resolution, low-power waveform generation in sensor excitation, test instrumentation, and communication subsystems where spectral purity and modulation agility are critical.
FAQ
What is the maximum output frequency achievable with the AD9834BRUZ-REEL?
The AD9834BRUZ-REEL supports a maximum output frequency of 37.5 MHz, derived from its 75 MHz master clock (MCLK) operating at the Nyquist limit (fOUT ≤ fMCLK/2). This is confirmed in the General Description and Specifications sections of the datasheet. The actual usable sine/triangle output is limited by DAC performance and filter design, but the device's architecture sustains spectral integrity up to this frequency. AD9834BRUZ-REEL achieves this with its 10-bit DAC and optimized SIN ROM lookup.
Does the AD9834BRUZ-REEL include an internal voltage reference?
Yes, the AD9834BRUZ-REEL integrates a precision 1.20 V bandgap reference, accessible at the REFOUT pin (Pin 2). Its output ranges from 1.12 V to 1.24 V over temperature (100 ppm/°C drift), and it can source/sink limited current for biasing external circuitry. This eliminates the need for an external reference in most applications. The AD9834BRUZ-REEL uses this reference internally for DAC full-scale calibration and comparator threshold setting.
How does the AD9834BRUZ-REEL support frequency and phase modulation?
The AD9834BRUZ-REEL supports frequency modulation (FM) and phase modulation (PM) via dual 28-bit frequency registers (FREQ0/FREQ1) and dual 12-bit phase registers (PHASE0/PHASE1). Modulation is executed by toggling between registers using either hardware pins (FSELECT/PSELECT) or software-controlled bits (FSEL/PSEL) in the control register. This enables real-time, glitch-free transitions essential for PSK/QAM schemes. AD9834BRUZ-REEL's architecture ensures continuous-phase modulation without output discontinuities.
What is the purpose of the SLEEP pin on the AD9834BRUZ-REEL?
The SLEEP pin (Pin 12) is an active-high digital input that powers down the DAC section while allowing the MCLK to remain active-reducing total supply current to 0.5–0.6 mA. This feature is critical for battery-operated systems requiring intermittent waveform generation, such as pulsed ultrasonic sensors. When asserted, AD9834BRUZ-REEL retains register contents and wakes in <1 ms, enabling rapid resumption of output without reconfiguration.
Can the AD9834BRUZ-REEL generate square-wave outputs?
Yes, the AD9834BRUZ-REEL generates square-wave outputs using its integrated comparator. The DAC's sine output is filtered and applied to the VIN pin (Pin 17); the comparator then produces a low-jitter square wave available at SIGN BIT OUT (Pin 16). This eliminates external components for clock generation in timing-critical applications. AD9834BRUZ-REEL's comparator features 4 MHz high-pass cutoff and 120 ps rms jitter on a 3 MHz sine input, ensuring clean digital edges.
AD9834BRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Resolution (Bits):
- 10 b
- Master fclk:
- 50 MHz
- Tuning Word Width (Bits):
- 28 b
- Voltage - Supply:
- 2.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
AD9834BRUZ-REEL FAQ
1.How can I place an order for AD9834BRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9834BRUZ-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 AD9834BRUZ-REEL reliable?
The price and inventory of AD9834BRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9834BRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD9834BRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9834BRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9834BRUZ-REEL?
AD9834BRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9834BRUZ-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 AD9834BRUZ-REEL?
For technical support, including AD9834BRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9834BRUZ-REEL requirements.
6.How does Aetrix verify that AD9834BRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD9834BRUZ-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 AD9834BRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD9834BRUZ-REEL?
All AD9834BRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD9834BRUZ-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 AD9834BRUZ-REEL part is unused and in its original packaging.
Return procedure for AD9834BRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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