Part A
ADF4355BCPZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4953 個数
- Package
- WFQFN-32
- Series
- クロックタイミング - クロックジェネレータ、PLL、周波数シンセサイザ
Replacement verdict
Not a drop-in replacement
The ADF4360-9BCPZ and ADF4355BCPZ are not functionally interchangeable. The ADF4355BCPZ offers a substantially wider frequency range, integrated VCO with fractional-N capability, and a different supply and package configuration, while the ADF4360-9BCPZ is a lower-frequency integer-N synthesizer with an external inductor-based VCO. Designers must revalidate loop filter, reference, and layout considerations before considering any substitution.
Different frequency range
Different synthesizer architecture
Different package and pinout
Different supply requirements
Parts at a glance
Part B
ADF4360-9BCPZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1808 個数
- Package
- WFQFN-24
- Series
- クロックタイミング - クロックジェネレータ、PLL、周波数シンセサイザ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4360-9BCPZ | ADF4355BCPZ | Why it matters |
|---|---|---|---|
| Function Type | Integer-N PLL frequency synthesizer with integrated VCO | Fractional-N / Integer-N PLL frequency synthesizer with integrated VCO | Fractional-N capability allows finer frequency resolution and faster settling, which is a fundamental architectural difference affecting substitutability. |
| Frequency Range | 65 MHz to 400 MHz | 54 MHz to 4400 MHz | The much wider tuning range of the ADF4355 covers higher frequency bands, so it can replace the ADF4360-9 only if the target band falls within the narrower range. |
| Maximum RF Output Frequency | 400 MHz | 4400 MHz | Applications requiring output above 400 MHz cannot use the ADF4360-9, making this a hard limit for direct substitution. |
| Supply Voltage | 3.0 V to 3.6 V | 3.15 V to 3.45 V | Slightly different supply windows affect power-rail compatibility and whether the part can drop into an existing 3.3 V design without rework. |
| Package | 24-Lead LFCSP (4 mm x 4 mm) | 32-Lead LFCSP (5 mm x 5 mm) | Different package footprint and pin count mean the PCB layout must be redesigned; the parts are not drop-in compatible. |
| Phase Detector Frequency | Up to 8 MHz | Up to 125 MHz | A higher phase detector frequency enables faster lock times and lower in-band phase noise, a key performance differentiator. |
| Frequency Resolution | Integer-N only (resolution tied to phase detector frequency) | Fractional-N with fine resolution (down to sub-Hz with modulus) | Fractional-N allows much finer channel spacing without reducing phase detector frequency, which the integer-N ADF4360-9 cannot achieve. |
| Control Interface | 3-wire serial (SPI-compatible) | 3-wire serial (SPI-compatible) with additional register set | Although both use serial control, register maps and programming sequences differ, requiring firmware changes when substituting. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both parts suit the same environmental conditions, so thermal constraints do not block substitution. |
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 | ADF4355BCPZ | ADF4360-9BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Fanout Distribution, Fractional N, Integer N, Clock/Frequency Synthesizer (RF) | Fanout Distribution, Integer N Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | Clock | CMOS, TTL |
| Output | Clock | Clock |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:2 | 1:2 |
| Differential - Input: Output | Yes/Yes | No/No |
| Frequency - Max | 6.8GHz | 400MHz |
| Divider / Multiplier | Yes/Yes | Yes/No |
| Voltage - Supply | 3.15V ~ 3.45V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADF4360-9BCPZ and the ADF4355BCPZ?
The ADF4360-9BCPZ is an integrated integer-N synthesizer and VCO operating from 65 MHz to 400 MHz with a fixed on-chip VCO, while the ADF4355BCPZ is a wideband fractional-N/integer-N PLL synthesizer with an integrated VCO covering 54 MHz to 13.6 GHz. The ADF4355BCPZ offers fractional-N operation, wider frequency coverage, and higher integration, whereas the ADF4360-9BCPZ is a simpler integer-N solution for lower-frequency applications.
Do the ADF4360-9BCPZ and ADF4355BCPZ use the same package and pinout?
No. The ADF4360-9BCPZ is supplied in a 24-lead LFCSP package, while the ADF4355BCPZ is supplied in a 32-lead LFCSP package. The pin counts and pin functions differ, so they are not pin-compatible and cannot be dropped into the same PCB land pattern.
What is the output frequency range of each device?
The ADF4360-9BCPZ integrates a VCO with an output frequency range of 65 MHz to 400 MHz. The ADF4355BCPZ integrates a VCO with a fundamental output range of 3.4 GHz to 6.8 GHz, and its output frequency range extends from 54 MHz to 13.6 GHz through internal dividers and doubler stages.
Which device supports fractional-N synthesis?
The ADF4355BCPZ supports both fractional-N and integer-N operation with a 25-bit modulus, enabling fine frequency resolution. The ADF4360-9BCPZ is an integer-N synthesizer and does not provide fractional-N operation.
How do the supply voltage and power consumption compare?
The ADF4360-9BCPZ operates from a 3.0 V to 3.6 V supply. The ADF4355BCPZ operates from a 3.15 V to 3.45 V analog supply and a 1.71 V to 1.89 V digital supply. Exact current consumption differs by configuration and should be confirmed from the respective manufacturer datasheets.
Can the ADF4360-9BCPZ be used as a direct replacement for the ADF4355BCPZ?
No. The two devices differ in package, pinout, frequency range, synthesis architecture, and supply requirements. A direct replacement is not possible; any substitution requires a full redesign and validation against the target application.
Which device is better suited for high-frequency applications?
The ADF4355BCPZ is suited for high-frequency applications because its integrated VCO and output stages cover up to 13.6 GHz. The ADF4360-9BCPZ is limited to 400 MHz and is intended for lower-frequency designs.