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 ADF4360-2BCPRL7 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
Different VCO integration
Different package footprint
Different supply architecture
Parts at a glance
Part B
ADF4360-2BCPRL7
ADI公司
- Lifecycle
- Active
- Stock
- 5844 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 | ADF4360-2BCPRL7 | 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 capability allows finer frequency resolution and faster settling, so the two parts are not functionally interchangeable in fractional-N designs. |
| Frequency Range | Up to 6.8 GHz (VCO output) | 1.05 GHz to 1.20 GHz | The operating band must cover the target LO frequency; the ADF4360-2 is limited to roughly 1.1 GHz while the ADF4355 reaches microwave bands. |
| Supply Voltage | 3.0 V to 3.6 V (analog and digital) | 3.0 V to 3.6 V | Both operate from a 3.3 V rail, so power-supply compatibility is maintained across 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 PCB layout must be redesigned; they are not drop-in replacements. |
| Output Frequency Divider | Programmable divide-by-1/2/4/8/16/32/64 | Programmable divide-by-1/2 | Wider divider range on the ADF4355 enables lower output frequencies from the same VCO core, affecting usable output range. |
| Phase Detector Frequency | Up to 125 MHz | Up to 8 MHz | A higher phase detector frequency improves phase noise and loop bandwidth, giving the ADF4355 better noise performance. |
| Control Interface | 3-wire SPI (32-bit register writes) | 3-wire SPI (24-bit register writes) | Register width and programming sequence differ, so firmware must be rewritten when swapping parts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings allow use in the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4355BCPZ | ADF4360-2BCPRL7 |
|---|---|---|
| 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 | 2.17GHz |
| 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 differences between the ADF4355BCPZ and the ADF4360-2BCPRL7?
The ADF4355BCPZ is a wideband fractional-N/integer-N PLL synthesizer with an integrated VCO covering 54 MHz to 13.6 GHz, while the ADF4360-2BCPRL7 is an integer-N PLL synthesizer with an integrated VCO covering 1850 MHz to 2170 MHz. The ADF4355BCPZ offers a much wider frequency range and fractional-N capability, whereas the ADF4360-2BCPRL7 is a fixed-frequency-range integer-N device.
What is the output frequency range of each device?
The ADF4355BCPZ covers an output frequency range of 54 MHz to 13.6 GHz. The ADF4360-2BCPRL7 covers 1850 MHz to 2170 MHz.
Do both devices include an integrated VCO?
Yes, both the ADF4355BCPZ and the ADF4360-2BCPRL7 integrate a VCO on-chip, which reduces external component count and board space.
What are the package differences between the ADF4355BCPZ and ADF4360-2BCPRL7?
The ADF4355BCPZ is supplied in a 32-lead LFCSP package. The ADF4360-2BCPRL7 is supplied in a 24-lead LFCSP package. The different pin counts and footprints mean they are not drop-in replacements for each other.
Can the ADF4355BCPZ and ADF4360-2BCPRL7 be used interchangeably in an existing design?
No. The two devices differ in frequency range, synthesizer architecture (fractional-N vs integer-N), package footprint, and pin configuration. A direct substitution is not possible without redesigning the RF matching, loop filter, and PCB layout.
Which device is better suited for wideband applications?
The ADF4355BCPZ is better suited for wideband applications because its integrated VCO covers 54 MHz to 13.6 GHz and it supports fractional-N synthesis, allowing fine frequency resolution across a broad range. The ADF4360-2BCPRL7 is limited to the 1850 MHz to 2170 MHz band.
What synthesizer architecture does each device use?
The ADF4355BCPZ uses a fractional-N/integer-N architecture. The ADF4360-2BCPRL7 uses an integer-N architecture.
Do both devices support SPI-compatible control interfaces?
Yes, both the ADF4355BCPZ and the ADF4360-2BCPRL7 are programmed through a serial interface compatible with SPI, allowing register configuration from a host microcontroller or FPGA.