AD9952YSVZ vs AD9951YSVZ

對 AD9952YSVZ 和 AD9951YSVZ 的深入比較，為您帶來關於其規格和關鍵特性的寶貴見解。我們詳細介紹了重要因素，包括 RoHS 合規性、REACH 狀態、系列、安裝方式、封裝類型以及其他相關特性。並排展示差異，簡化了元件選擇，讓您更輕鬆地為您的特定應用選擇最佳方案。

Technical review by ETEI Component Engineering Source: manufacturer documentation

Replacement verdict

Compatible functional replacement candidate

The AD9951YSVZ and AD9952YSVZ are functionally compatible direct replacements, sharing the same 48-lead TQFP package, 1 GSPS DDS core, 14-bit DAC resolution, and 400 MSPS internal update rate. The AD9952YSVZ adds an integrated high-speed comparator on the DAC output, which is the primary functional differentiator; designs not requiring the comparator can substitute the AD9951YSVZ without layout changes, while designs relying on the comparator must validate that function before substitution.

Package Type High match
DAC Resolution High match
Maximum Clock Frequency High match
Integrated Comparator Validation required

Review the critical differences →

Parts at a glance

Key differences

Rows are prioritized by design impact. Highlighted values require attention during substitution.

Key electrical and mechanical differences between the two devices

Parameter AD9951YSVZ AD9952YSVZ Why it matters
DAC Resolution 14 bit 14 bit Determines the amplitude quantization and spectral purity of the synthesized output; identical resolution means comparable output fidelity.
Maximum DAC Update Rate / Sample Rate 400 MSPS 400 MSPS Sets the maximum frequency that can be directly generated; matching rates mean equivalent upper frequency capability.
On-Chip Comparator No Yes An integrated comparator enables square-wave/clock generation and threshold detection without external circuitry, affecting functional substitutability.
Maximum Output Frequency Up to ~200 MHz (Nyquist-limited) Up to ~200 MHz (Nyquist-limited) Defines the usable signal bandwidth; equivalent limits mean similar application range.
Supply Voltage 1.8 V core / 3.3 V I/O 1.8 V core / 3.3 V I/O Must match the board's power rails; identical requirements allow drop-in power compatibility.
Package 48-lead TQFP (TQFP-48) 48-lead TQFP (TQFP-48) Footprint and pinout compatibility are essential for physical substitutability on an existing PCB.
Serial Control Interface SPI-compatible serial I/O SPI-compatible serial I/O Determines how the device is configured by the host; matching interfaces simplify firmware reuse.
On-Chip PLL Multiplier Yes (4x–20x) Yes (4x–20x) Allows generation of high internal sample clocks from a lower reference; identical ranges preserve clocking design.

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Full specification comparison

Use manufacturer datasheets as the final authority.

Specification AD9952YSVZ AD9951YSVZ
Part Status Active Active
Resolution(Bits) 14 b 14 b
Masterfclk 400 MHz 400 MHz
Tuning Word Width(Bits) 32 b 32 b
Voltage - Supply 1.71V ~ 1.96V 1.71V ~ 1.96V
Operating Temperature -40°C ~ 105°C -40°C ~ 105°C
Mounting Type Surface Mount Surface Mount

Frequently asked questions

What are the key differences between the AD9951YSVZ and AD9952YSVZ DDS ICs?

Both are 400 MSPS, 14-bit direct digital synthesizers in a 48-lead TQFP_EP package. The primary difference is that the AD9952YSVZ integrates an on-chip 14-bit DAC with a comparator for square-wave output, while the AD9951YSVZ provides a differential current-output DAC without the integrated comparator. Both share the same 1.8 V core, 3.3 V I/O, 32-bit frequency tuning word, and 14-bit phase offset resolution.

Are the AD9951YSVZ and AD9952YSVZ pin-compatible?

Yes. Both devices are offered in the same 48-lead TQFP_EP (SV-48-4) package with identical pin assignments, allowing a common PCB footprint. However, pin-compatibility does not guarantee functional equivalence; the AD9952YSVZ comparator output pin functions differ from the corresponding DAC output configuration on the AD9951YSVZ, so the surrounding circuitry must be validated.

What is the maximum DAC update rate and frequency tuning resolution of these devices?

Both the AD9951YSVZ and AD9952YSVZ support a maximum DAC update rate of 400 MSPS and provide a 32-bit frequency tuning word, yielding a frequency resolution of approximately 0.093 Hz at 400 MSPS (400 MHz / 2^32). Phase offset resolution is 14 bits (approximately 0.022 degrees).

Does the AD9952YSVZ include an integrated comparator that the AD9951YSVZ lacks?

Yes. The AD9952YSVZ integrates an on-chip comparator that converts the DAC output into a square wave, making it suitable for clock-generation and square-wave applications. The AD9951YSVZ does not include this comparator and provides only the differential current-mode DAC outputs, requiring external signal conditioning for square-wave generation.

What are the power supply requirements and typical power consumption for these DDS ICs?

Both devices operate from a 1.8 V digital core supply and a 3.3 V I/O supply. Typical power consumption is approximately 155 mW at 400 MSPS with the DAC and comparator active (AD9952YSVZ) or DAC active (AD9951YSVZ), depending on configuration. Designers should consult the respective datasheets for exact current consumption under specific operating modes.

Can the AD9951YSVZ be used as a drop-in replacement for the AD9952YSVZ in an existing design?

Not as a direct drop-in replacement. Although the package and pinout are identical, the AD9952YSVZ provides an integrated comparator output that the AD9951YSVZ does not. A design relying on the comparator output would require external circuitry if migrated to the AD9951YSVZ. Conversely, migrating from AD9951YSVZ to AD9952YSVZ requires verifying that the comparator output pin does not conflict with existing DAC output routing.

What serial interface and control features do the AD9951YSVZ and AD9952YSVZ support?

Both devices feature a serial I/O port supporting SPI-compatible communication with configurable word lengths, and include on-chip registers for frequency, phase, and amplitude control. They support sinusoidal output via the integrated 14-bit DAC and offer power-down modes. The AD9952YSVZ additionally exposes comparator control registers for its integrated square-wave output path.

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