Part A
ADF4159CCPZ-RL7
ADI公司
- Lifecycle
- Active
- Stock
- 5050 件
- Package
- WFQFN-24
- Series
- 時鐘定時-時鐘發生器、PLL、頻率合成器
Replacement verdict
Compatible functional replacement candidate
The ADF4159CCPZ-RL7 is a functional upgrade candidate for the ADF4158CCPZ, sharing the same LFCSP-24 footprint, 3.0 V to 3.6 V supply range, and fractional-N PLL architecture, while extending the maximum RF input frequency to 13 GHz and adding ramp generation capability. Designers should validate loop filter and register map differences before substituting in existing ADF4158CCPZ designs.
Package Type
High match
Supply Voltage Range
High match
Maximum RF Input Frequency
Validation required
Register Map Compatibility
Validation required
Parts at a glance
Part B
ADF4158CCPZ
ADI公司
- Lifecycle
- Active
- Stock
- 1970 件
- Package
- WFQFN-24
- Series
- 時鐘定時-時鐘發生器、PLL、頻率合成器
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 | ADF4159CCPZ-RL7 | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 6.1 GHz | 13 GHz | Determines the highest frequency the PLL can synthesize; the ADF4159 supports roughly double the upper frequency range, enabling higher-band applications. |
| Modulation Capability | FMCW ramps and frequency shift keying (FSK) | FMCW ramps, FSK, and phase shift keying (PSK) | Defines which modulation schemes are available for radar and signal-generation designs; the ADF4159 adds PSK support for more advanced waveform generation. |
| Maximum Ramp/Modulation Rate | Up to 25 MHz/µs ramp rate capability | Up to 100 MHz/µs ramp rate capability | Faster ramp rates allow wider-bandwidth FMCW chirps, improving range resolution in radar systems; the ADF4159 supports significantly faster ramps. |
| Phase Frequency Detector (PFD) Frequency | Up to 32 MHz | Up to 110 MHz | A higher PFD frequency enables wider loop bandwidth and lower in-band phase noise; the ADF4159 supports a much higher PFD rate. |
| Normalized Phase Noise Floor | -222 dBc/Hz (typical) | -224 dBc/Hz (typical) | Lower phase noise floor translates to cleaner synthesized signals; the ADF4159 offers a slightly better noise floor for demanding applications. |
| Maximum RF Output Frequency (Fundamental) | 6.1 GHz | 13 GHz | Sets the usable output band of the synthesizer; the ADF4159 covers higher frequencies, making it suitable for mmWave and higher-band radar front ends. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 3.3 V | Both devices operate from the same supply range, so power-supply design is interchangeable between the two parts. |
| Package | 24-lead LFCSP (4 mm × 4 mm) | 24-lead LFCSP (4 mm × 4 mm) | Identical package and footprint allow drop-in board-level substitution without layout changes. |
| Interface | 3-wire SPI | 3-wire SPI | Same serial control interface means firmware and host communication can be reused across both parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4159CCPZ-RL7 | ADF4158CCPZ |
|---|---|---|
| Part Status | Active | Active |
| PLL | Yes | Yes |
| Input | CMOS, TTL | CMOS, TTL |
| Output | CMOS | Clock |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 13GHz | 6.1GHz |
| Divider / Multiplier | Yes/Yes | Yes/Yes |
| Voltage - Supply | 1.62V ~ 3.45V | 2.7V ~ 3.3V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Type | - | Fractional N Synthesizer (RF) |
Frequently asked questions
What are the key differences between the ADF4158CCPZ and the ADF4159CCPZ-RL7?
Both are fractional-N frequency synthesizers in a 24-lead LFCSP package, but they differ in maximum RF output frequency and modulation capabilities. The ADF4158 operates up to 6.1 GHz and is optimized for frequency-modulated continuous wave (FMCW) radar with programmable ramp generation, while the ADF4159 operates up to 13 GHz and supports higher-frequency ramp generation for radar and test applications. The ADF4159CCPZ-RL7 is supplied in tape-and-reel packaging, whereas the ADF4158CCPZ is typically supplied in trays.
Are the ADF4158CCPZ and ADF4159CCPZ-RL7 pin-compatible?
Both devices are offered in a 24-lead LFCSP package with the same footprint, and their pin functions are largely aligned per the respective datasheets. However, designers should verify the pin assignments and external component requirements against each datasheet before considering a layout-compatible substitution, since RF port configuration and supply decoupling may differ.
What is the maximum RF output frequency of each device?
The ADF4158 has a maximum RF output frequency of 6.1 GHz. The ADF4159 has a maximum RF output frequency of 13 GHz. Designs requiring operation above 6.1 GHz must use the ADF4159.
Which device is better suited for FMCW radar ramp generation?
Both devices integrate ramp generation for FMCW radar. The ADF4158 is specified for ramp generation up to its 6.1 GHz output range, while the ADF4159 extends ramp generation capability to 13 GHz, making it suitable for higher-frequency radar and instrumentation designs. Selection depends on the required operating frequency and ramp timing specifications in each datasheet.
Do both parts support fractional-N operation?
Yes. Both the ADF4158 and ADF4159 are fractional-N frequency synthesizers, supporting programmable fractional modulus and integer-N operation as described in their respective datasheets.
What packaging difference exists between the ADF4158CCPZ and ADF4159CCPZ-RL7?
Both parts use the 24-lead LFCSP package. The ADF4158CCPZ suffix denotes the standard tray packaging, while the ADF4159CCPZ-RL7 suffix denotes tape-and-reel packaging in reels of 7-inch format, which is preferable for automated high-volume assembly.
Can the ADF4158CCPZ be replaced by the ADF4159CCPZ-RL7 in an existing design?
Direct replacement requires validation. Although both share the 24-lead LFCSP footprint, the ADF4159 supports a higher maximum output frequency (13 GHz versus 6.1 GHz) and may have different register maps, ramp parameters, and external matching requirements. The design must be re-verified against the ADF4159 datasheet, including loop filter, RF matching, and SPI programming, before substitution.
What supply voltage do these synthesizers require?
Both the ADF4158 and ADF4159 operate from a nominal 3.3 V supply, with an analog and digital supply range specified in their datasheets (typically 2.7 V to 3.3 V). Designers should consult the respective datasheet electrical specifications for exact limits and decoupling requirements.