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 ADF4169CCPZ and ADF4158CCPZ are both fractional-N PLL synthesizers in a compatible 24-lead LFCSP package and share the same 3.0 V to 3.6 V supply range, making the ADF4169CCPZ a viable functional replacement candidate for the ADF4158CCPZ in many designs. However, the ADF4169CCPZ offers a higher maximum RF input frequency and faster phase detector operation, so the system clocking, loop filter, and register configuration must be revalidated before substitution.
Package Type
High match
Supply Voltage Range
High match
Maximum RF Input Frequency
Validation required
Phase Detector Frequency
Validation required
Parts at a glance
Part B
ADF4169CCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2362 Stückzahl
- Package
- WFQFN-24
- Series
- Takt- und anwendungsspezifisch
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4169CCPZ | ADF4158CCPZ | Why it matters |
|---|---|---|---|
| Frequency Range (Max) | 6.1 GHz | 6.1 GHz | Both cover the same upper frequency, so RF band coverage is equivalent for high-band designs. |
| Maximum RF Input Frequency (REFIN) | 6.1 GHz | 6.1 GHz | Determines the highest external reference or RF signal the PLL can accept directly. |
| Modulation / Waveform Generation | FMCW ramps with programmable sawtooth and triangular profiles | FMCW ramps with programmable sawtooth and triangular profiles | Both support frequency-modulated continuous-wave ramping, critical for radar and swept-frequency applications. |
| Phase Detector Frequency (Max) | 125 MHz | 125 MHz | Higher PFD frequency enables wider loop bandwidth and lower in-band phase noise. |
| Normalized Phase Noise Floor | -224 dBc/Hz | -224 dBc/Hz | Sets the achievable phase-noise performance of the synthesizer in the loop. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Defines the required power rail; identical range means the same supply design can be reused. |
| Package / Pin Count | 32-Lead LFCSP | 32-Lead LFCSP | Same package and pin count allows drop-in PCB compatibility if pinouts match. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature range supports the same environmental qualification. |
| Interface | 3-wire SPI | 3-wire SPI | Same serial control interface simplifies firmware and host-controller reuse. |
| Charge Pump Current (Programmable) | Up to 5 mA | Up to 5 mA | Charge pump current range affects loop filter design and lock time; matching values ease 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 | ADF4158CCPZ | ADF4169CCPZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Fractional N Synthesizer (RF) | - |
| PLL | Yes | - |
| Input | CMOS, TTL | - |
| Output | Clock | - |
| Number of Circuits | 1 | - |
| Ratio - Input: Output | 2:1 | - |
| Differential - Input: Output | Yes/No | - |
| Frequency - Max | 6.1GHz | - |
| Divider / Multiplier | Yes/Yes | - |
| Voltage - Supply | 2.7V ~ 3.3V | - |
| Operating Temperature | -40°C ~ 125°C | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
What are the key differences between the ADF4169CCPZ and ADF4158CCPZ?
The ADF4169CCPZ is a 13.5 GHz fractional-N/integer-N PLL synthesizer with integrated VCO, while the ADF4158CCPZ is a 6.1 GHz fractional-N PLL synthesizer without an integrated VCO. The ADF4169CCPZ integrates a fundamental VCO covering approximately 6.1 GHz to 13.5 GHz, whereas the ADF4158CCPZ requires an external VCO. Both are housed in a 24-lead LFCSP package and share a similar register architecture, but the ADF4169CCPZ targets higher frequency applications with its integrated VCO.
Are the ADF4169CCPZ and ADF4158CCPZ pin-compatible?
No. Although both devices are offered in a 24-lead LFCSP package, they are not pin-compatible. The ADF4169CCPZ includes integrated VCO-related pins and RF output structures that differ from the ADF4158CCPZ, which provides charge pump and external VCO interface pins. A direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
What is the maximum RF output frequency of each device?
The ADF4169CCPZ supports RF output frequencies up to 13.5 GHz through its integrated VCO. The ADF4158CCPZ, being a PLL synthesizer without an integrated VCO, has a maximum PFD frequency of 32 MHz and its output frequency is determined by the external VCO used; the device itself does not specify an RF output frequency limit beyond the external VCO and prescaler constraints.
Do both devices support fractional-N operation?
Yes. Both the ADF4169CCPZ and ADF4158CCPZ are fractional-N PLL synthesizers supporting fractional-N and integer-N modes. Both include a 25-bit fixed-modulus fractional divider and support programmable modulus in fractional mode, allowing fine frequency resolution for their respective applications.
What are the typical applications for each device?
The ADF4169CCPZ is typically used in high-frequency applications such as microwave point-to-point links, satellite communications, radar, and test equipment where an integrated VCO up to 13.5 GHz is beneficial. The ADF4158CCPZ is commonly used in wireless infrastructure, microwave backhaul, and instrumentation where an external VCO is preferred for flexibility in frequency planning.
What supply voltage and current consumption do these devices require?
Both the ADF4169CCPZ and ADF4158CCPZ operate from a 3.0 V to 3.6 V supply. The ADF4169CCPZ integrates a VCO, which increases its overall current consumption compared to the ADF4158CCPZ, which only powers the PLL synthesizer core. Exact current figures should be taken from the respective manufacturer datasheets, as they depend on operating mode and configuration.
Can the ADF4158CCPZ be used to generate frequencies above 6.1 GHz?
Yes, provided an external VCO and appropriate prescaler are used. The ADF4158CCPZ itself does not have an integrated VCO, so its output frequency is determined by the external VCO connected to it. The device supports a maximum PFD frequency of 32 MHz and includes a programmable prescaler, enabling operation with external VCOs at higher frequencies within the limits defined in the datasheet.
Do both devices support phase resync and fast lock features?
Both the ADF4169CCPZ and ADF4158CCPZ support phase resync and fast lock features, including programmable charge pump current, fast lock switch, and phase resync circuitry. These features help reduce lock time and maintain phase coherence in frequency-hopping applications. Refer to the respective datasheets for specific timing and configuration details.