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 ADF4169CCPZ-RL7 are both fractional-N PLL synthesizers in a compatible 24-lead LFCSP package with overlapping supply and temperature ranges, making the ADF4169CCPZ-RL7 a viable functional replacement candidate for the ADF4158CCPZ in many designs. However, the ADF4169 offers a higher maximum RF input frequency and faster phase detector operation, so the designer must validate loop filter, reference, and register configuration against the target application before substituting.
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-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2632 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 | ADF4158CCPZ | ADF4169CCPZ-RL7 | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 6.1 GHz | 13.5 GHz | Determines the highest frequency the PLL can synthesize; the ADF4169 supports roughly double the upper frequency range, enabling higher-band applications. |
| Maximum PFD Frequency | 32 MHz | 125 MHz | A higher phase-frequency detector rate allows wider loop bandwidth and faster settling, which is critical for frequency-hopping and radar ramp applications. |
| Normalized Phase Noise (PN1Hz) | -220 dBc/Hz | -224 dBc/Hz | Lower normalized phase noise yields cleaner spectral output; the ADF4169 offers about 4 dB improvement, benefiting sensitive RF systems. |
| Maximum Ramp/Modulation Clock | 25 MHz | 50 MHz | Governs how fast frequency ramps can be clocked; a faster ramp clock supports steeper or finer-resolution chirps in FMCW radar. |
| Ramp/Modulation Resolution | 12-bit | 12-bit | Defines the step granularity of frequency ramps; both share the same resolution, so ramp linearity performance is comparable. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 3.3 V | Both operate from the same analog/digital supply range, allowing drop-in compatibility in existing 3 V designs. |
| Package | 24-Lead LFCSP (4x4 mm) | 24-Lead LFCSP (4x4 mm) | Identical package and footprint enable direct PCB substitution without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Matching industrial temperature ranges ensure equivalent environmental robustness for both parts. |
| Interface | 3-wire SPI | 3-wire SPI | Same serial interface protocol simplifies firmware reuse and host controller compatibility. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4158CCPZ | ADF4169CCPZ-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| PLL | Yes | Yes |
| Main Purpose | - | FMCW Radar |
| Input | CMOS, TTL | CMOS |
| Output | Clock | Clock |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 6.1GHz | 13.5GHz |
| Voltage - Supply | 2.7V ~ 3.3V | 2.7V ~ 3.45V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Type | Fractional N Synthesizer (RF) | - |
| Divider / Multiplier | Yes/Yes | - |
Frequently asked questions
What are the key differences between the ADF4158CCPZ and the ADF4169CCPZ-RL7?
The ADF4158CCPZ is a 6.1 GHz fractional-N PLL synthesizer with integrated waveform generation (ramp/FSK/PSK) capability, while the ADF4169CCPZ-RL7 is a 13.5 GHz fractional-N PLL synthesizer that also integrates waveform generation. The ADF4169 offers a higher maximum RF input frequency (13.5 GHz vs 6.1 GHz) and a higher maximum phase detector frequency (125 MHz vs 32 MHz), making it suitable for higher-frequency applications such as radar and high-bandwidth systems.
Are the ADF4158CCPZ and ADF4169CCPZ-RL7 pin-compatible?
No. Both devices are offered in a 24-lead LFCSP package, but the ADF4169CCPZ-RL7 has additional functionality and a different pin configuration to support its higher frequency range and features. A direct drop-in replacement is not possible; the PCB layout and pin assignments must be verified against each device's datasheet before substitution.
What is the maximum RF output frequency of each device?
The ADF4158CCPZ supports RF input frequencies up to 6.1 GHz. The ADF4169CCPZ-RL7 supports RF input frequencies up to 13.5 GHz. Both are fractional-N synthesizers intended for use with external VCOs or as part of a complete PLL loop.
Do both devices support frequency ramp and modulation functions?
Yes. Both the ADF4158CCPZ and ADF4169CCPZ-RL7 integrate waveform generation capability, supporting frequency ramp (sawtooth/triangular), FSK, and PSK modulation. This makes both parts suitable for radar, test equipment, and communications applications requiring modulated PLL outputs.
What is the maximum phase detector frequency for each part?
The ADF4158CCPZ has a maximum phase detector frequency of 32 MHz. The ADF4169CCPZ-RL7 supports a maximum phase detector frequency of 125 MHz, allowing higher loop bandwidth and faster settling in demanding applications.
What package and operating temperature range do these devices use?
Both the ADF4158CCPZ and ADF4169CCPZ-RL7 are supplied in a 24-lead LFCSP package and are specified for operation over the industrial temperature range of −40°C to +85°C. The ADF4169CCPZ-RL7 is supplied in tape-and-reel format (RL7 suffix).
Which device should be selected for a higher-frequency radar design?
For designs requiring RF input frequencies above 6.1 GHz, the ADF4169CCPZ-RL7 is the appropriate choice because it supports up to 13.5 GHz and a 125 MHz phase detector frequency. The ADF4158CCPZ is limited to 6.1 GHz and 32 MHz phase detector frequency, so it is better suited to lower-frequency applications.