Part A
AD9851BRSZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1354 ПКС
- Package
- SSOP-28
- Series
- Интерфейс - прямой цифровой синтез (DDS)
Replacement verdict
Compatible functional replacement candidate
The AD9851BRSZRL and AD9851BRSZ are functionally equivalent direct digital synthesizer devices from Analog Devices, sharing identical core specifications including resolution, clock speed, supply voltage, and package type. The only meaningful distinction is the delivery format, with the RL suffix denoting tape-and-reel packaging versus the tube format of the base part number. For design-in and production purposes, either device can serve as a direct substitute, provided the assembly process accommodates the respective packaging format.
Package Type
High match
Resolution and Clock Speed
High match
Supply Voltage
High match
Packaging Format
Validation required
Parts at a glance
Part B
AD9851BRSZRL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6594 ПКС
- Package
- SSOP-28
- Series
- Интерфейс - прямой цифровой синтез (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 | AD9851BRSZRL | AD9851BRSZ | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures identical silicon design and process, supporting functional substitutability. |
| Function | Direct Digital Synthesizer (DDS) with integrated 10-bit DAC | Direct Digital Synthesizer (DDS) with integrated 10-bit DAC | Identical core function confirms the parts are interchangeable for the same DDS application. |
| Package / Case | 28-SSOP (0.209", 5.30mm width) | 28-SSOP (0.209", 5.30mm width) | Same package and footprint allow drop-in replacement on an existing PCB layout. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Matching supply range ensures compatibility with the same power rail design. |
| Maximum Clock Frequency | 180 MHz | 180 MHz | Same maximum clock supports identical output frequency range and spectral performance. |
| DAC Resolution | 10 bit | 10 bit | Identical DAC resolution yields the same output amplitude quantization and SFDR characteristics. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Same temperature rating ensures equivalent reliability across the same environmental conditions. |
| Packaging / Reel | Tape & Reel (RL suffix) | Tube / Tray | Different packaging affects assembly line handling and inventory format, though the device itself is identical. |
| Ordering Quantity / MOQ | Reel quantity (typically 1500 pcs per reel) | Tube quantity (typically 47 pcs per tube) | Different minimum order quantities impact procurement planning and cost for production runs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9851BRSZ | AD9851BRSZRL |
|---|---|---|
| Part Status | Active | Active |
| Resolution(Bits) | 10 b | 10 b |
| Masterfclk | 180 MHz | 180 MHz |
| Tuning Word Width(Bits) | 32 b | 32 b |
| Voltage - Supply | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AD9851BRSZ and AD9851BRSZRL?
The AD9851BRSZ and AD9851BRSZRL are functionally identical devices; the difference is packaging format. AD9851BRSZ is supplied in tube/tray packaging, while the AD9851BRSZRL suffix "RL" denotes tape-and-reel packaging for automated assembly. Both use the same 28-lead SSOP package and share identical electrical specifications.
Are the AD9851BRSZ and AD9851BRSZRL electrically interchangeable?
Yes. Both variants are the same AD9851 direct digital synthesizer die in a 28-lead SSOP package, with identical pinout, supply voltage range (2.7 V to 5.25 V), and 180 MHz clock capability. They differ only in shipping packaging, so they are electrically and functionally interchangeable.
What is the maximum clock frequency of the AD9851?
The AD9851 supports a maximum system clock of 180 MHz. An internal 6x reference clock multiplier allows a lower-frequency reference (for example, 30 MHz) to be multiplied up to the 180 MHz system clock.
What is the resolution of the AD9851 DDS?
The AD9851 provides 32-bit frequency tuning resolution and a 10-bit on-chip digital-to-analog converter (DAC). This yields a frequency resolution of approximately 0.04 Hz with a 180 MHz system clock.
What supply voltage does the AD9851 require?
The AD9851 operates from a single supply of 2.7 V to 5.25 V. It is commonly operated at 3.3 V or 5 V, and the digital interface is compatible with both logic levels.
What is the difference between the AD9851 and the AD9850?
The AD9851 is an enhanced version of the AD9850. Key differences include an on-chip 6x reference clock multiplier (allowing a 180 MHz system clock from a 30 MHz reference) and operation down to 2.7 V, whereas the AD9850 requires a higher minimum supply and lacks the clock multiplier.
Does the AD9851 include an on-chip comparator?
Yes. The AD9851 integrates a high-speed comparator that can convert the sinusoidal DAC output into a square wave, enabling the device to be used as a clock generator or for other square-wave output applications.
What package do the AD9851BRSZ and AD9851BRSZRL use?
Both variants are supplied in a 28-lead SSOP (Shrink Small Outline Package). The package and pinout are identical between the two ordering codes; only the delivery format (tube/tray versus tape-and-reel) differs.