Part A
AD9852ASVZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5594 個数
- Package
- TQFP-80
- Series
- インターフェース - ダイレクト・デジタル・シンセシス（DDS）
Replacement verdict
Compatible functional replacement candidate
The AD9858BSVZ and AD9852ASVZ are both direct digital synthesizers in the same TQFP-80 package with identical supply and temperature ratings, making them strong functional replacement candidates. However, the AD9858BSVZ offers a significantly higher maximum clock rate and DAC resolution, while the AD9852ASVZ provides dual integrated DACs. Designers should validate clocking, output filtering, and DAC channel requirements before substituting one for the other.
Package Type
High match
Supply Voltage
High match
Maximum Clock Frequency
Validation required
DAC Channel Count
Not compatible
Parts at a glance
Part B
AD9858BSVZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2934 個数
- Package
- TQFP-100
- Series
- インターフェース - ダイレクト・デジタル・シンセシス（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 | AD9858BSVZ | AD9852ASVZ | Why it matters |
|---|---|---|---|
| Maximum Clock Frequency | 1 GHz | 300 MHz | Determines the maximum output frequency and update rate; the AD9858 supports much higher speed synthesis. |
| DAC Resolution | 10 bit | 12 bit | Higher resolution yields lower quantization noise and better spectral purity of the synthesized waveform. |
| On-Chip Comparator | Yes | No | An integrated comparator enables direct square-wave/clock generation without external circuitry. |
| On-Chip PLL | Yes | Yes | Both integrate a PLL for reference clock multiplication, but the multiplier range and reference handling differ. |
| Supply Voltage | 3.3 V | 3.3 V | Same nominal supply simplifies board-level power design when substituting parts. |
| Package | 100-lead TQFP (14x14 mm) | 80-lead TQFP (14x14 mm) | Different pin counts and footprints prevent direct drop-in replacement on an existing PCB. |
| Output Channels | 1 DAC output | 2 DAC outputs (dual) | The AD9852 provides two independent outputs, enabling I/Q or dual-tone generation not possible with the single-output AD9858. |
| Phase Noise / SFDR Performance | Optimized for high-speed, wideband synthesis | Optimized for high-resolution, low-distortion synthesis | The two parts target different spectral performance trade-offs, affecting signal quality in the target application. |
| Primary Application Focus | High-speed frequency synthesis, radar, clock generation | Precision waveform generation, communications, instrumentation | Functional substitutability depends on whether the application prioritizes speed (AD9858) or resolution/dual output (AD9852). |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9852ASVZ | AD9858BSVZ |
|---|---|---|
| Part Status | Active | Active |
| Resolution(Bits) | 12 b | 10 b |
| Masterfclk | 300 MHz | 1 GHz |
| Tuning Word Width(Bits) | 48 b | 32 b |
| Voltage - Supply | 3.14V ~ 3.47V | 3.14V ~ 3.47V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD9858BSVZ and the AD9852ASVZ?
The AD9858BSVZ is a 1 GSPS direct digital synthesizer (DDS) with an integrated 10-bit DAC, while the AD9852ASVZ is a 300 MSPS DDS with an integrated 12-bit DAC. The AD9858 offers a higher maximum clock rate and includes an on-chip 32-bit accumulator and phase accumulator, whereas the AD9852 provides higher DAC resolution and includes dual 48-bit frequency tuning words and a 14-bit phase offset. Both are housed in 80-lead TQFP packages but differ in speed, resolution, and feature set.
Are the AD9858BSVZ and AD9852ASVZ pin-compatible?
No. Although both devices are offered in 80-lead TQFP packages, their pinouts and internal architectures differ. The AD9858BSVZ and AD9852ASVZ are not pin-compatible, so a direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
What is the maximum clock frequency of each device?
The AD9858BSVZ supports a maximum clock frequency of 1 GSPS (1000 MSPS). The AD9852ASVZ supports a maximum clock frequency of 300 MSPS. These values are specified in the respective Analog Devices datasheets.
How do the DAC resolutions compare between the two DDS devices?
The AD9858BSVZ integrates a 10-bit digital-to-analog converter (DAC), while the AD9852ASVZ integrates a 12-bit DAC. The higher resolution of the AD9852ASVZ provides finer amplitude quantization, whereas the AD9858BSVZ prioritizes higher sample rate over DAC bit depth.
What are the power supply requirements for the AD9858BSVZ and AD9852ASVZ?
Both devices operate from a 3.3 V nominal supply. The AD9858BSVZ typically requires separate analog and digital 3.3 V supplies, and the AD9852ASVZ also operates from 3.3 V with separate analog and digital supply pins. Designers should consult the respective datasheets for exact current consumption and decoupling requirements.
Which device is better suited for high-frequency signal generation?
The AD9858BSVZ is better suited for high-frequency signal generation because its 1 GSPS maximum clock rate supports higher output frequencies than the 300 MSPS maximum clock rate of the AD9852ASVZ. The AD9858BSVZ is intended for applications requiring wideband frequency synthesis, while the AD9852ASVZ targets lower-frequency, higher-resolution synthesis applications.
Do both devices support frequency and phase tuning?
Yes. Both the AD9858BSVZ and AD9852ASVZ support programmable frequency and phase tuning. The AD9858BSVZ includes a 32-bit frequency tuning word and a 14-bit phase offset word. The AD9852ASVZ includes dual 48-bit frequency tuning words and a 14-bit phase offset word. Exact register maps and programming interfaces differ between the two devices.
What package type do the AD9858BSVZ and AD9852ASVZ use?
Both the AD9858BSVZ and AD9852ASVZ are supplied in 80-lead TQFP (thin quad flat pack) packages. The package footprint dimensions are similar, but pin assignments are not identical, so PCB layouts must be designed specifically for each device.