Part A
ADF4158CCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1970 Stückzahl
- Package
- WFQFN-24
- Series
- Clock-Timing mit Taktgeneratoren, PLLs, Frequenzsynthesizer
Replacement verdict
Compatible functional replacement candidate
The ADF4158CCPZ and ADF4107BCP are both integer-N/fractional-N PLL frequency synthesizers in a compatible 20-lead LFCSP package with overlapping supply and temperature ranges, making the ADF4158CCPZ a viable functional replacement candidate for the ADF4107BCP in many designs. However, the ADF4158CCPZ adds waveform generation and ramp capability while offering a lower maximum RF input frequency, so RF front-end requirements and loop filter design must be validated before substitution.
Maximum RF Input Frequency
Validation required
Package Type
High match
Supply Voltage Range
High match
Synthesizer Function
Validation required
Parts at a glance
Part B
ADF4107BCP
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5195 Stückzahl
- Package
- WFQFN-20
- Series
- Clock-Timing mit Taktgeneratoren, PLLs, Frequenzsynthesizer
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4158CCPZ | ADF4107BCP | Why it matters |
|---|---|---|---|
| Function Type | Fractional-N frequency synthesizer with integrated VCO modulator (modulation capability) | Integer-N frequency synthesizer (PLL only) | Determines whether the device supports fractional-N synthesis and modulation; these are not functionally interchangeable in fractional or modulated applications. |
| Maximum RF Input Frequency | 6 GHz | 4 GHz | Sets the upper limit of the synthesizer's operating band; a lower-frequency part cannot substitute in higher-frequency designs. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 3.3 V | Both operate from the same nominal 3 V rail, so power-supply compatibility is maintained. |
| Package | 20-lead LFCSP (CP-20) | 20-lead LFCSP (CP-20) | Identical package and pin count simplify board-level replacement, though pin functions must still be verified. |
| Modulation / Ramp Capability | Yes (integrated frequency modulation and ramp generation) | No | Modulation and ramp features are essential for FMCW radar and swept-frequency applications; the integer-N part lacks this capability. |
| Phase Detector Frequency | Up to 32 MHz | Up to 104 MHz | Higher phase detector frequency enables wider loop bandwidth and lower phase noise; the two parts differ significantly here. |
| Charge Pump Current | Programmable, up to 5 mA | Programmable, up to 5 mA | Charge pump current affects loop filter design and lock time; matching values ease loop filter reuse. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range supports use in the same environmental conditions. |
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 | ADF4158CCPZ | ADF4107BCP |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Fractional N Synthesizer (RF) | Clock/Frequency Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | CMOS, TTL | CMOS |
| Output | Clock | Clock |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 6.1GHz | 7GHz |
| Divider / Multiplier | Yes/Yes | No/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 ~ 125°C | - |
Frequently asked questions
What is the fundamental functional difference between the ADF4158CCPZ and the ADF4107BCP?
The ADF4158CCPZ is a 6.1 GHz fractional-N frequency synthesizer with integrated waveform generation capability, including frequency ramp and frequency shift keying (FSK) modulation, intended for radar and frequency-modulated continuous-wave (FMCW) applications. The ADF4107BCP is a 7.0 GHz integer-N PLL frequency synthesizer intended for general-purpose local oscillator generation. The ADF4158 supports fractional-N operation and modulation waveforms, while the ADF4107 is an integer-N device without modulation features.
What is the maximum RF input frequency for each device?
The ADF4158CCPZ has a maximum RF input frequency of 6.1 GHz. The ADF4107BCP has a maximum RF input frequency of 7.0 GHz. The ADF4107 therefore offers a higher upper frequency limit, while the ADF4158 trades some frequency range for fractional-N and modulation capability.
Do the ADF4158CCPZ and ADF4107BCP use the same package and pinout?
Both devices are offered in a 20-lead LFCSP package. However, the pin functions and internal architecture differ because the ADF4158 includes modulation and fractional-N circuitry while the ADF4107 is an integer-N synthesizer. The pinouts are not identical, so a direct drop-in replacement without schematic and layout review is not supported. Designers must consult the respective datasheets for pin assignments.
Which device supports fractional-N operation and modulation waveforms?
Only the ADF4158CCPZ supports fractional-N operation and integrated waveform generation, including frequency ramp and FSK modulation. The ADF4107BCP is an integer-N synthesizer and does not provide fractional-N or modulation waveform generation. For FMCW radar or modulated LO applications, the ADF4158 is the appropriate choice.
What are the typical supply voltage and logic interface requirements for these devices?
Both the ADF4158CCPZ and ADF4107BCP operate from a nominal 3.0 V to 3.6 V supply for the charge pump and digital sections, with a separate supply for the RF input stage. Both use a 3-wire serial interface (SPI-compatible) for programming. Designers should verify the exact supply ranges and interface levels in the respective manufacturer datasheets before finalizing the design.
Can the ADF4107BCP be used as a direct replacement for the ADF4158CCPZ in an existing design?
No. The ADF4107BCP is an integer-N synthesizer without fractional-N or modulation capability, while the ADF4158CCPZ provides fractional-N operation and waveform generation. Replacing the ADF4158 with the ADF4107 would remove modulation functionality and change the loop dynamics and programming model. A direct replacement is not supported without redesign and validation against the target application requirements.
Which device is better suited for FMCW radar or frequency-ramp applications?
The ADF4158CCPZ is specifically designed for FMCW radar and frequency-ramp applications because it integrates waveform generation, including frequency ramp and FSK modulation, along with fractional-N operation. The ADF4107BCP lacks these modulation features and is intended for general-purpose integer-N frequency synthesis. For radar and ramp-based systems, the ADF4158 is the appropriate selection.