Part A
ADF4360-1BCPZ
ADI公司
- Lifecycle
- Active
- Stock
- 1269 件
- Package
- WFQFN-24
- 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 ADF4360-1BCPZ are not drop-in replacements for one another. Although both are Analog Devices fractional-N PLL frequency synthesizers, they differ fundamentally in integration level, frequency range, supply architecture, and package footprint, so a direct board-level substitution is not feasible without redesign.
Different frequency range
Integrated VCO vs external VCO
Different package footprint
Different supply architecture
Parts at a glance
Part B
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
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 | ADF4360-1BCPZ | Why it matters |
|---|---|---|---|
| Frequency Range (Max) | 4400 MHz | 2450 MHz | Determines the highest output frequency the synthesizer can generate; the ADF4355 covers a much wider band including higher RF/microwave applications. |
| Frequency Range (Min) | 53.125 MHz | 2050 MHz | Defines the lowest usable output frequency; the ADF4355 can operate at much lower frequencies, while the ADF4360-1 is limited to a narrow high band. |
| Integrated VCO | Yes | Yes | Both integrate a VCO, simplifying design and reducing external component count, though their VCO tuning ranges differ significantly. |
| Output Frequency Divider / Prescaler | Dual modulus prescaler 4/5, 8/9 with programmable dividers | Fixed divide-by-2 output stage | Affects the flexibility of generating multiple output frequencies from a single VCO band; the ADF4355 offers more programmable division options. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Both operate from a similar 3.3 V nominal supply, so power rail compatibility is maintained between the two parts. |
| Package | 32-Lead LFCSP (5 mm x 5 mm) | 24-Lead LFCSP (4 mm x 4 mm) | Different footprint and pin count mean the two devices are not drop-in PCB compatible and require separate layout designs. |
| Control Interface | 3-wire SPI (serial) | 3-wire SPI (serial) | Both use a similar serial programming interface, easing firmware porting, though register maps differ. |
| Phase Noise (typical) | Lower phase noise (approx. -110 dBc/Hz at 100 kHz offset, 4 GHz) | Higher phase noise (approx. -90 dBc/Hz at 100 kHz offset) | Phase noise impacts signal purity and spectral performance; the ADF4355 provides superior noise performance for demanding RF systems. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings ensure both parts suit the same environmental conditions. |
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 | ADF4360-1BCPZ | ADF4355BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Fanout Distribution, Integer N Synthesizer (RF) | Fanout Distribution, Fractional N, Integer N, Clock/Frequency Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | CMOS, TTL | Clock |
| Output | Clock | Clock |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:2 | 1:2 |
| Differential - Input: Output | No/No | Yes/Yes |
| Frequency - Max | 2.45GHz | 6.8GHz |
| Divider / Multiplier | Yes/No | Yes/Yes |
| Voltage - Supply | 3V ~ 3.6V | 3.15V ~ 3.45V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the fundamental difference between the ADF4355BCPZ and the ADF4360-1BCPZ?
The ADF4355BCPZ is an integrated fractional-N PLL and VCO synthesizer with an output frequency range of 54 MHz to 4400 MHz, while the ADF4360-1BCPZ is an integrated integer-N PLL and VCO synthesizer with an output frequency range of 2050 MHz to 2450 MHz. The ADF4355BCPZ supports fractional-N operation and a wider frequency range, whereas the ADF4360-1BCPZ is an integer-N device with a narrower, higher-frequency band.
Are the ADF4355BCPZ and ADF4360-1BCPZ pin-compatible or package-compatible?
No. The ADF4355BCPZ is supplied in a 32-lead LFCSP package, while the ADF4360-1BCPZ is supplied in a 24-lead LFCSP package. The different lead counts and pin assignments mean they are not pin-compatible and cannot be dropped into the same PCB land pattern without redesign.
What are the output frequency ranges of the ADF4355BCPZ and ADF4360-1BCPZ?
The ADF4355BCPZ has an output frequency range of 54 MHz to 4400 MHz. The ADF4360-1BCPZ has an output frequency range of 2050 MHz to 2450 MHz. The ADF4355BCPZ covers a much wider range, including the band covered by the ADF4360-1BCPZ.
Does the ADF4355BCPZ support fractional-N synthesis while the ADF4360-1BCPZ does not?
Yes. The ADF4355BCPZ is a fractional-N synthesizer, which allows finer frequency resolution and lower phase noise performance through fractional division. The ADF4360-1BCPZ is an integer-N synthesizer, so its frequency resolution is limited by the phase detector comparison frequency and integer divider ratios.
What are the supply voltage requirements for the ADF4355BCPZ and ADF4360-1BCPZ?
The ADF4355BCPZ operates from a 3.3 V supply (with a nominal range of 3.15 V to 3.45 V) for its analog and digital sections, and includes an on-chip regulator for the VCO. The ADF4360-1BCPZ operates from a 3.3 V supply (nominally 3.0 V to 3.6 V). Both are 3.3 V-class devices, but the exact specified limits should be confirmed in the respective datasheets before design.
Can the ADF4360-1BCPZ be used as a direct replacement for the ADF4355BCPZ in an existing design?
No. The two devices differ in package size and pin count (32-lead vs 24-lead LFCSP), frequency range, synthesis architecture (fractional-N vs integer-N), and register/programming interface. A direct replacement is not possible; any substitution requires a PCB redesign and firmware changes validated against the manufacturer datasheets.
Which device is better suited for wideband applications requiring coverage below 2 GHz?
The ADF4355BCPZ is the appropriate choice because its output frequency range extends down to 54 MHz and up to 4400 MHz. The ADF4360-1BCPZ is specified only for 2050 MHz to 2450 MHz and does not cover frequencies below 2 GHz, so it is not suitable for wideband applications requiring sub-2 GHz coverage.
Do both devices integrate a VCO on-chip?
Yes. Both the ADF4355BCPZ and the ADF4360-1BCPZ are integrated PLL and VCO synthesizers, meaning the voltage-controlled oscillator is included on the die. This reduces external component count compared with discrete PLL-plus-external-VCO designs, though external loop filter components are still required for both devices.