Part A
ADF4355BCPZ
ADI公司
- Lifecycle
- Active
- Stock
- 4953 件
- Package
- WFQFN-32
- Series
- 時鐘定時-時鐘發生器、PLL、頻率合成器
Replacement verdict
Not a drop-in replacement
The ADF4355BCPZ and ADF4360-1BCP are not drop-in replacements for one another. The ADF4355BCPZ is a wideband fractional-N/integer-N PLL synthesizer with an integrated VCO covering 54 MHz to 13.6 GHz, while the ADF4360-1BCP is a complete integer-N PLL synthesizer with an integrated VCO centered at 2.05 GHz to 2.45 GHz. They differ in frequency range, control interface, package footprint, and supply architecture, so a direct board-level substitution is not possible without redesign.
Different frequency range
Different control interface
Different package footprint
Different supply architecture
Parts at a glance
Part B
ADF4360-1BCP
ADI公司
- Lifecycle
- Active
- Stock
- 729 件
- Package
- WFQFN-24
- Series
- 時鐘定時-時鐘發生器、PLL、頻率合成器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4355BCPZ | ADF4360-1BCP | Why it matters |
|---|---|---|---|
| Function Type | Fractional-N / Integer-N PLL frequency synthesizer with integrated VCO | Integer-N PLL frequency synthesizer with integrated VCO | Fractional-N support allows finer frequency resolution and faster settling, while integer-N only supports step sizes equal to the phase detector frequency. |
| Frequency Range | Up to 6.8 GHz (RF output) | 2.05 GHz to 2.45 GHz | The output frequency range determines which applications and bands each synthesizer can directly cover. |
| Maximum RF Output Frequency | 6.8 GHz | 2.45 GHz | A higher maximum frequency enables operation in higher bands such as C-band and microwave links. |
| Phase Detector Frequency (Max) | 125 MHz | 8 MHz | A higher phase detector frequency improves phase noise performance and allows wider loop bandwidths. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Supply voltage compatibility ensures the device can be powered from the same rail as surrounding circuitry. |
| Package | 32-Lead LFCSP (5 mm x 5 mm) | 24-Lead LFCSP (4 mm x 4 mm) | Package footprint and pin count affect PCB layout and whether a drop-in replacement is possible. |
| Control Interface | 3-wire SPI (serial) | 3-wire SPI (serial) | A compatible serial interface simplifies firmware reuse and host processor connection. |
| Integrated VCO | Yes | Yes | An integrated VCO reduces external component count and board area for the synthesizer. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range compatibility ensures reliable operation in harsh environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4355BCPZ | ADF4360-1BCP |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Fanout Distribution, Fractional N, Integer N, Clock/Frequency Synthesizer (RF) | Fanout Distribution, Integer N Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | Clock | CMOS |
| Output | Clock | Clock |
| Ratio - Input: Output | 1:2 | 1:2 |
| Differential - Input: Output | Yes/Yes | No/No |
| Frequency - Max | 6.8GHz | 2.45GHz |
| Divider / Multiplier | Yes/Yes | Yes/No |
| Voltage - Supply | 3.15V ~ 3.45V | 3V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Circuits | 1 | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key architectural differences between the ADF4355BCPZ and the ADF4360-1BCP?
The ADF4355BCPZ is a fractional-N/integer-N PLL frequency synthesizer with an integrated VCO covering 54 MHz to 13.6 GHz, while the ADF4360-1BCP is an integer-N PLL synthesizer with an integrated VCO covering 2.05 GHz to 2.45 GHz. The ADF4355BCPZ offers a much wider frequency range and fractional-N capability, whereas the ADF4360-1BCP is limited to integer-N operation within a narrower band.
Are the ADF4355BCPZ and ADF4360-1BCP pin-to-pin or package compatible?
No. The ADF4355BCPZ is supplied in a 32-lead LFCSP package, while the ADF4360-1BCP is supplied in a 24-lead LFCSP package. The different package sizes, pin counts, and pin assignments prevent direct pin-to-pin substitution.
What is the maximum RF output frequency of each device?
The ADF4355BCPZ supports RF output frequencies from 54 MHz up to 13.6 GHz. The ADF4360-1BCP supports an output frequency range of 2.05 GHz to 2.45 GHz. The ADF4355BCPZ therefore covers a substantially higher and wider frequency range.
Do both devices support fractional-N synthesis?
No. The ADF4355BCPZ supports both fractional-N and integer-N operation. The ADF4360-1BCP is an integer-N PLL synthesizer and does not support fractional-N operation.
How do the supply voltage requirements compare?
The ADF4355BCPZ operates from a nominal 3.3 V supply for its analog and digital sections, with a separate charge pump supply. The ADF4360-1BCP operates from a 3.0 V to 3.6 V supply. Both are 3.3 V-class devices, but the ADF4355BCPZ includes additional supply domains that must be considered in the design.
Can the ADF4360-1BCP be used as a drop-in replacement for the ADF4355BCPZ in an existing design?
No. The two devices differ in package, pin count, frequency range, synthesis architecture, and register map. A drop-in replacement is not possible; any substitution requires a redesign of the PCB layout, loop filter, and control software, followed by validation against the manufacturer datasheets.
Which device is better suited for wideband applications requiring output above 3 GHz?
The ADF4355BCPZ is the appropriate choice, as its integrated VCO and output range extend to 13.6 GHz. The ADF4360-1BCP is limited to 2.45 GHz maximum output and cannot cover frequencies above that range.