Part A
ADF4002BCPZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3484 ПКС
- Package
- WFQFN-20
- Series
- Часовое время - Часовые генераторы, PLL, частотные синтезаторы
Replacement verdict
Not a drop-in replacement
The ADF4002BCPZ and ADF4007BCP are not drop-in replacements for one another. Although both are integer-N PLL frequency synthesizers in a 20-lead LFCSP package, they differ in maximum operating frequency, phase detector frequency, and input sensitivity, so the ADF4007BCP cannot directly substitute for the ADF4002BCPZ without a full design review and validation.
Different maximum RF input frequency
Different phase detector frequency
Different input sensitivity
Different supply current
Parts at a glance
Part B
ADF4007BCP
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6630 ПКС
- Package
- WFQFN-20
- Series
- Часовое время - Часовые генераторы, PLL, частотные синтезаторы
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4002BCPZ | ADF4007BCP | Why it matters |
|---|---|---|---|
| Function Type | PLL Frequency Synthesizer (integer-N) | PLL Frequency Synthesizer (integer-N) | Both are integer-N PLL synthesizers, but their internal architecture and intended application differ, affecting direct substitutability. |
| Maximum RF Input Frequency | 400 MHz | 1 GHz | The maximum input frequency determines the highest reference or VCO frequency the device can accept, directly limiting usable frequency range. |
| Supply Voltage Range | 2.7 V to 3.3 V | 3.0 V to 3.6 V | Compatible supply voltage ranges are required for the part to operate correctly in a given system rail. |
| Package | 20-Lead LFCSP (4x4 mm) | 20-Lead LFCSP (4x4 mm) | Package and footprint must match for a drop-in replacement on an existing PCB. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | The temperature range must cover the target application environment for reliable operation. |
| Number of PLLs | 1 | 1 | Single-PLL architecture in both parts means the same system topology can be used, but other specs still govern substitution. |
| Programmable Charge Pump Current | Yes | Yes | Adjustable charge pump current allows loop filter optimization; both support it, easing loop design reuse. |
| Interface | 3-wire serial (SPI-compatible) | 3-wire serial (SPI-compatible) | A matching serial control interface allows the same microcontroller firmware to drive either device. |
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 | ADF4002BCPZ | ADF4007BCP |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Clock/Frequency Synthesizer (RF), Phase Detector | Clock/Frequency Synthesizer (RF) |
| PLL | Yes with Bypass | Yes |
| Input | CMOS, TTL | CMOS |
| Output | Clock | Clock |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 400MHz | 7.5GHz |
| Divider / Multiplier | Yes/No | Yes/No |
| Voltage - Supply | 2.7V ~ 3.3V | 2.7V ~ 3.3V |
| 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 ADF4002BCPZ and the ADF4007BCP?
The ADF4002BCPZ is a single integer-N/fractional-N PLL frequency synthesizer with an integrated phase detector and programmable charge pump, while the ADF4007BCP is a dedicated integer-N frequency synthesizer with a fixed divide-by-2 prescaler and a higher maximum operating frequency. The ADF4002BCPZ supports fractional-N operation and a wider range of programmable reference and feedback dividers, whereas the ADF4007BCP is optimized for integer-N applications requiring a fixed prescaler.
Are the ADF4002BCPZ and ADF4007BCP pin-compatible?
No. The ADF4002BCPZ is supplied in a 20-lead LFCSP package, while the ADF4007BCP is supplied in a 20-lead LFCSP package as well, but the pin functions and internal architecture differ between the two devices. Pin assignments and control register maps are not interchangeable, so the PCB layout and software must be designed specifically for each part.
What is the maximum operating frequency of each device?
The ADF4002BCPZ has a maximum RF input frequency of 400 MHz at the RF input pins. The ADF4007BCP has a maximum RF input frequency of 1.2 GHz, supported by its integrated fixed divide-by-2 prescaler. The higher frequency capability of the ADF4007BCP makes it suitable for applications requiring higher VCO or reference frequencies.
Do both devices support fractional-N operation?
No. The ADF4002BCPZ supports both integer-N and fractional-N operation, with programmable fractional modulus and phase resync features. The ADF4007BCP is an integer-N synthesizer only and does not support fractional-N mode. This is a fundamental architectural difference that affects loop filter design, spurious performance, and frequency resolution.
What are the supply voltage and power consumption specifications?
Both the ADF4002BCPZ and ADF4007BCP operate from a supply voltage range of 2.7 V to 3.3 V. The ADF4002BCPZ typically consumes approximately 5.5 mA at 3 V, while the ADF4007BCP typically consumes approximately 7 mA at 3 V. Exact current consumption depends on the programmed charge pump current and operating mode, and should be verified against the respective manufacturer datasheets.
Can the ADF4002BCPZ directly replace the ADF4007BCP in an existing design?
No, a direct replacement is not possible without design changes. The two devices differ in frequency range, fractional-N capability, register map, and pin functions. The ADF4002BCPZ cannot operate at the 1.2 GHz input frequency supported by the ADF4007BCP, and the ADF4007BCP lacks the fractional-N features of the ADF4002BCPZ. Schematic, layout, and firmware changes would be required.
What are the typical applications for each device?
The ADF4002BCPZ is typically used in applications requiring fine frequency resolution and fractional-N synthesis, such as wireless infrastructure, test equipment, and clock generation. The ADF4007BCP is typically used in integer-N applications requiring higher input frequencies, such as local oscillator generation in microwave radios and high-frequency signal sources. Application suitability should be confirmed against each device's datasheet specifications.