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 ADF4360-1BCPRL are not functionally interchangeable. The ADF4355BCPZ is a wideband fractional-N synthesizer with an integrated VCO covering 54 MHz to 13.6 GHz, while the ADF4360-1BCPRL is a lower-frequency integer-N synthesizer with an integrated VCO covering 2050 MHz to 2450 MHz. Their frequency range, synthesis architecture, package footprint, and control interface differ fundamentally, so substituting one for the other requires a complete board and firmware redesign rather than a drop-in swap.
Different frequency range
Different synthesis architecture
Different package footprint
Different control interface
Parts at a glance
Part B
ADF4360-1BCPRL
ADI公司
- Lifecycle
- Active
- Stock
- 3330 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 | ADF4360-1BCPRL | 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, so the two parts are not functionally interchangeable in fractional-N designs. |
| Frequency Range | Up to 6.8 GHz (RF output range approximately 53.125 MHz to 6800 MHz) | Approximately 2.05 GHz to 2.45 GHz | The operating band determines whether the device can cover the target application frequency; the ranges differ substantially. |
| Maximum RF Output Frequency | 6.8 GHz | 2.45 GHz | A higher maximum output frequency enables higher-band applications that the lower-frequency part cannot support. |
| Supply Voltage | 3.0 V to 3.6 V (analog and digital), charge pump up to 5.5 V | 3.0 V to 3.6 V | Supply requirements affect power-rail design and compatibility; the ADF4355 offers a higher charge-pump supply option. |
| Package | 32-lead LFCSP (5 mm x 5 mm) | 24-lead LFCSP (4 mm x 4 mm) | Different package footprints and pin counts require different PCB layouts, preventing drop-in replacement. |
| Phase Detector / PFD Frequency | Up to 125 MHz | Up to 8 MHz | A higher phase-detector frequency generally yields lower in-band phase noise and faster lock times. |
| Modulus / Fractional Capability | Fractional-N with programmable modulus (12-bit) | Integer-N only | Fractional-N capability enables finer channel spacing without changing the reference, which the integer-N part cannot provide. |
| Output Divider / Prescaler | Programmable dual-modulus prescaler (4/5, 8/9) and output dividers | Fixed dual-modulus prescaler (8/9) | Programmable prescalers and dividers give more flexibility in frequency planning and output range. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both share the same industrial temperature range, so thermal environment is not a differentiator. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4355BCPZ | ADF4360-1BCPRL |
|---|---|---|
| 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 ADF4360-1BCPRL?
The ADF4355BCPZ is an integrated integer-N/fractional-N PLL with an integrated VCO operating from 3.4 GHz to 6.8 GHz, featuring a 24-bit fractional modulus and a phase detector frequency up to 125 MHz. The ADF4360-1BCPRL is an integer-N PLL with an integrated VCO operating from 2050 MHz to 2450 MHz, with a fixed modulus and a maximum phase detector frequency of 8 MHz. The ADF4355BCPZ supports fractional-N synthesis and wider frequency coverage, while the ADF4360-1BCPRL is an integer-N synthesizer optimized for a narrower band.
What is the frequency range of each device?
The ADF4355BCPZ integrated VCO covers 3.4 GHz to 6.8 GHz, with output dividers allowing lower frequencies. The ADF4360-1BCPRL integrated VCO covers 2050 MHz to 2450 MHz. The ADF4355BCPZ provides significantly wider fundamental frequency coverage than the ADF4360-1BCPRL.
Do these devices support fractional-N synthesis?
The ADF4355BCPZ supports both integer-N and fractional-N operation with a 24-bit fractional modulus. The ADF4360-1BCPRL is an integer-N only synthesizer and does not support fractional-N operation. This is a fundamental architectural difference between the two parts.
What are the package and pin count differences?
The ADF4355BCPZ is supplied in a 32-lead LFCSP package. The ADF4360-1BCPRL is supplied in a 24-lead LFCSP package. The different package sizes and pin counts mean the two devices are not footprint-compatible and cannot be dropped into the same PCB land pattern.
What are the supply voltage requirements for each device?
The ADF4355BCPZ operates from a nominal 3.3 V supply for its analog and digital sections, with a separate charge pump supply. The ADF4360-1BCPRL operates from a nominal 3.3 V supply. Designers should consult the respective manufacturer datasheets for exact supply ranges and decoupling requirements before finalizing a design.
Can the ADF4360-1BCPRL be used as a direct drop-in replacement for the ADF4355BCPZ?
No. The two devices differ in package size and pin count (32-lead versus 24-lead LFCSP), frequency range, fractional-N capability, and phase detector frequency. They are not pin-compatible or footprint-compatible, and a direct drop-in replacement is not possible without a PCB redesign and revalidation of the loop filter and synthesis requirements.
Which device is better suited for wideband frequency synthesis applications?
The ADF4355BCPZ is better suited for wideband synthesis because its integrated VCO covers 3.4 GHz to 6.8 GHz and it supports fractional-N operation with a 24-bit modulus, enabling fine frequency resolution across a broad range. The ADF4360-1BCPRL is limited to the 2050 MHz to 2450 MHz band and integer-N operation, making it more appropriate for narrower-band applications.
What is the maximum phase detector frequency for each device?
The ADF4355BCPZ supports a phase detector frequency up to 125 MHz. The ADF4360-1BCPRL supports a maximum phase detector frequency of 8 MHz. This difference affects loop bandwidth, settling time, and phase noise performance in a given design.