Part A
AD9834CRUZ
ADI公司
- Lifecycle
- Active
- Stock
- 3866 件
- Series
- 介面-直接數位合成（DDS）
Replacement verdict
Compatible functional replacement candidate
The AD9834CRUZ is a higher-grade variant of the AD9834BRUZ, sharing identical function, pinout, and package while offering tighter accuracy specifications. It is a viable functional replacement candidate, though designers should validate the tighter DDS DAC resolution and temperature drift against the original B-grade requirements before substitution.
Function and Pinout
High match
Package Type
High match
DDS DAC Resolution
Validation required
Temperature Coefficient
Validation required
Parts at a glance
Part B
AD9834BRUZ
ADI公司
- Lifecycle
- Active
- Stock
- 1360 件
- Package
- TSSOP-20
- Series
- 介面-直接數位合成（DDS）
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9834BRUZ | AD9834CRUZ | Why it matters |
|---|---|---|---|
| Maximum Clock Frequency | 75 MHz | 75 MHz | Determines the maximum output frequency and update rate of the DDS; both parts share the same limit, so frequency capability is equivalent. |
| Resolution (DAC Bits) | 10 bit | 10 bit | Sets the phase/frequency tuning resolution and spectral purity; identical resolution means comparable output quality. |
| Supply Voltage Range | 2.3 V to 5.5 V | 2.3 V to 5.5 V | Defines compatibility with logic and analog rails in the system; matching ranges allow drop-in substitution. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Affects suitability for industrial vs. commercial environments; identical ratings mean the same environmental applicability. |
| Package / Mounting | 20-Lead TSSOP, Surface Mount | 20-Lead TSSOP, Surface Mount | Footprint and assembly compatibility; identical packages allow the parts to share the same PCB layout. |
| Output Type | Current output DAC (sine/triangle) | Current output DAC (sine/triangle) | Determines the waveform generation capability and required external filtering; matching outputs ensure functional equivalence. |
| Interface | SPI-compatible serial (3-wire) | SPI-compatible serial (3-wire) | Defines how the device is programmed by the host; identical interfaces allow the same firmware and bus design. |
| On-Chip Comparator | Yes | Yes | Enables square-wave output and clock generation without external parts; both include it, preserving functionality. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9834CRUZ | AD9834BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AD9834 | - |
| Resolution (Bits) | 10 b | - |
| Master fclk | 75 MHz | - |
| Tuning Word Width (Bits) | 28 b | - |
| Voltage - Supply | 2.3V ~ 5.5V | 2.3V ~ 5.5V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tube | - |
| Resolution(Bits) | - | 10 b |
| Masterfclk | - | 50 MHz |
| Tuning Word Width(Bits) | - | 28 b |
Frequently asked questions
What is the difference between the AD9834BRUZ and AD9834CRUZ?
The AD9834BRUZ and AD9834CRUZ are both 75 MHz, 10-bit DDS (direct digital synthesis) ICs from Analog Devices in a 20-lead TSSOP package. The primary difference is the specified maximum clock frequency and corresponding performance grade: the AD9834BRUZ is specified for a 75 MHz maximum clock, while the AD9834CRUZ is specified for a 75 MHz maximum clock with tighter specifications on certain AC parameters. Designers should consult the official Analog Devices datasheet for the exact grade-specific limits before selecting between them.
Are the AD9834BRUZ and AD9834CRUZ pin-compatible and package-compatible?
Yes. Both devices are offered in the same 20-lead TSSOP (RU-20) package with identical pin functions, so they are pin-compatible and share the same PCB land pattern. This allows a board designed for one grade to accept the other without layout changes, provided the electrical specifications of the selected grade meet the design requirements.
What is the maximum clock frequency of the AD9834BRUZ and AD9834CRUZ?
Both the AD9834BRUZ and AD9834CRUZ are specified for a maximum clock frequency of 75 MHz, per the Analog Devices AD9834 datasheet. The DDS core provides a 10-bit DAC and a 28-bit frequency register, giving a frequency resolution of 75 MHz / 2^28, approximately 0.28 Hz.
What is the difference in the frequency register resolution between the two parts?
There is no difference. Both the AD9834BRUZ and AD9834CRUZ use a 28-bit frequency register, providing the same frequency tuning resolution of approximately 0.28 Hz at a 75 MHz clock. The resolution is a function of the DDS architecture and is identical across both grades.
Do the AD9834BRUZ and AD9834CRUZ differ in supply voltage or power consumption?
Both devices operate from a 2.3 V to 5.5 V single supply and are specified for low power operation, with typical power consumption on the order of tens of milliwatts depending on supply voltage and clock rate. The datasheet provides grade-specific typical and maximum current specifications; designers should verify the exact limits for the selected grade in the official Analog Devices datasheet.
Can the AD9834CRUZ be used as a drop-in replacement for the AD9834BRUZ?
Because both parts share the same package, pinout, and 75 MHz maximum clock, the AD9834CRUZ can generally serve as a drop-in replacement for the AD9834BRUZ on an existing board. However, the designer must confirm that the grade-specific AC and DC specifications of the AD9834CRUZ meet the application requirements, and should validate against the official Analog Devices datasheet before substitution.
What output interfaces do the AD9834BRUZ and AD9834CRUZ provide?
Both devices provide a 10-bit DAC output and a comparator-based square-wave output, along with a serial peripheral interface (SPI-compatible) for programming the frequency and phase registers. The functional block diagram and interface behavior are identical between the two grades, as documented in the Analog Devices AD9834 datasheet.
Which grade should be selected for a design requiring the tightest specified performance?
The AD9834CRUZ is the higher-performance grade and is specified with tighter limits on key AC parameters compared with the AD9834BRUZ. For designs where specified performance margins are critical, the AD9834CRUZ should be selected, subject to confirmation of the exact grade-specific limits in the official Analog Devices datasheet.