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 ADF4360-1BCPRL7 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 ADF4360-1BCPRL7 is a lower-frequency integer-N PLL synthesizer with an integrated VCO covering 2050 MHz to 2450 MHz. Their frequency range, architecture, package, and control interface differ substantially, so substitution requires full redesign and validation.
Different frequency range
Different synthesizer architecture
Different package and footprint
Different control interface
Parts at a glance
Part B
ADF4360-1BCPRL7
ADI公司
- Lifecycle
- Active
- Stock
- 9613 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 | ADF4360-1BCPRL7 | Why it matters |
|---|---|---|---|
| Function | 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 4.4 GHz (RF output) | 2.05 GHz to 2.45 GHz | The operating band must cover the target application frequency; the ADF4355 covers a much wider range than the ADF4360-1. |
| Maximum RF Output Frequency | 4.4 GHz | 2.45 GHz | Higher output frequency enables higher-band applications that the lower-frequency part cannot reach. |
| Package | 32-Lead LFCSP (5 mm x 5 mm) | 24-Lead LFCSP (4 mm x 4 mm) | Different package footprints and pinouts prevent direct drop-in board replacement. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Both operate from the same nominal 3.3 V rail, so power-supply design is compatible. |
| Phase Detector Frequency | Up to 125 MHz | Up to 8 MHz | A higher phase detector frequency enables wider loop bandwidth and faster lock times, affecting dynamic performance. |
| Frequency Resolution | Fractional-N with fine resolution (sub-Hz achievable with modulus) | Integer-N only, resolution limited by phase detector frequency | Fractional-N provides much finer channel spacing, which is critical for narrow-band and agile frequency planning. |
| Output Power | Programmable, approximately -4 dBm to +5 dBm | Approximately -13 dBm to -4 dBm (typical) | Output power level affects link budget and whether external amplification is required. |
| Control Interface | 3-wire SPI (serial) with additional lock detect and mux pins | 3-wire SPI (serial) | Both use SPI, but register maps and control details differ, requiring firmware changes when substituting. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4355BCPZ | ADF4360-1BCPRL7 |
|---|---|---|
| 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 is the fundamental difference between the ADF4355BCPZ and the ADF4360-1BCPRL7?
The ADF4355BCPZ is a wideband fractional-N/integer-N PLL frequency synthesizer with an integrated VCO covering 54 MHz to 13.6 GHz, while the ADF4360-1BCPRL7 is a complete integer-N PLL synthesizer with an integrated VCO covering 2.05 GHz to 2.45 GHz. The ADF4355BCPZ offers fractional-N operation and a much wider frequency range, whereas the ADF4360-1BCPRL7 is an integer-N only device with a narrower, fixed VCO band.
Are the ADF4355BCPZ and ADF4360-1BCPRL7 pin-to-pin or package compatible?
No. The ADF4355BCPZ is supplied in a 32-lead LFCSP (5 mm × 5 mm) package, while the ADF4360-1BCPRL7 is supplied in a 24-lead LFCSP (4 mm × 4 mm) package. The pin counts, package footprints, and pin functions differ, so they are not drop-in replacements for each other.
What is the frequency range of each device?
The ADF4355BCPZ integrates a VCO with a fundamental range of 3.4 GHz to 6.8 GHz and, through internal dividers, provides output coverage from 54 MHz to 13.6 GHz. The ADF4360-1BCPRL7 integrates a VCO covering 2.05 GHz to 2.45 GHz with a specified output range of 2.05 GHz to 2.45 GHz.
Do both devices support fractional-N synthesis?
No. The ADF4355BCPZ supports both fractional-N and integer-N modes with a 25-bit modulus fractional divider. The ADF4360-1BCPRL7 is an integer-N PLL synthesizer only and does not provide fractional-N operation.
How do the phase noise and normalized noise floor specifications compare?
The ADF4355BCPZ specifies a normalized phase noise floor of −230 dBc/Hz (fractional-N) and −227 dBc/Hz (integer-N) in its datasheet. The ADF4360-1BCPRL7 specifies a normalized phase noise floor of −219 dBc/Hz. The ADF4355BCPZ therefore offers a lower normalized noise floor, though actual in-band and out-of-band phase noise depends on loop filter design, reference, and operating frequency.
What are the supply voltage and current consumption differences?
The ADF4355BCPZ operates from a 3.3 V analog and digital supply with a charge pump supply up to 5 V, and its datasheet specifies a typical total current consumption of approximately 75 mA depending on configuration. The ADF4360-1BCPRL7 operates from a 3.0 V to 3.6 V supply and typically draws about 45 mA. Exact current depends on programmed settings and output configuration.
Which device is better suited for wideband applications such as instrumentation or microwave point-to-point links?
The ADF4355BCPZ is the appropriate choice for wideband and microwave applications because its integrated VCO and divider chain cover 54 MHz to 13.6 GHz with fractional-N capability. The ADF4360-1BCPRL7 is limited to the 2.05 GHz to 2.45 GHz band and integer-N operation, making it suitable for narrowband applications such as certain wireless infrastructure and ISM-band designs rather than wideband microwave synthesis.
Can the ADF4360-1BCPRL7 be used as a direct substitute for the ADF4355BCPZ in an existing design?
No. Beyond the package and pinout differences, the ADF4360-1BCPRL7 cannot cover the ADF4355BCPZ frequency range, lacks fractional-N mode, and has different register maps and control interfaces. Substitution would require a complete redesign of the RF path, loop filter, and firmware, and would only be valid if the target frequency falls within 2.05 GHz to 2.45 GHz.