Part A
ADF4159CCPZ-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5050 Stückzahl
- Package
- WFQFN-24
- Series
- Clock-Timing mit Taktgeneratoren, PLLs, Frequenzsynthesizer
Replacement verdict
Not a drop-in replacement
The ADF4159CCPZ-RL7 and ADF4107BCP are not functionally interchangeable despite sharing a common LFCSP package family. The ADF4159 is a 13 GHz fractional-N synthesizer with integrated ramp generation and modulation capability, while the ADF4107 is a 7 GHz integer-N PLL frequency synthesizer. Their maximum operating frequency, synthesizer architecture, and feature sets differ fundamentally, so the ADF4107BCP cannot serve as a direct substitute for the ADF4159CCPZ-RL7 in ramp-modulation or fractional-N applications.
Different synthesizer architecture
Different maximum frequency
Different modulation features
Different package footprint
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 | ADF4159CCPZ-RL7 | ADF4107BCP | Why it matters |
|---|---|---|---|
| Function Type | Fractional-N / Integer-N PLL synthesizer with integrated VCO modulator (ramp generation) | Integer-N PLL frequency synthesizer | Defines the core capability; a fractional-N ramp-capable device cannot be directly substituted by an integer-N-only synthesizer for FMCW/radar applications. |
| Maximum RF Input Frequency | 13 GHz | 7 GHz | Determines the highest frequency the prescaler/PLL can lock to; a lower limit restricts use in higher-band microwave systems. |
| Maximum PFD Frequency | 110 MHz | 104 MHz | Higher phase-frequency detector rates allow wider loop bandwidths and lower in-band phase noise, affecting synthesizer performance. |
| Modulus / Fractional Resolution | 25-bit fractional modulus (programmable) | Integer-N only (no fractional modulus) | Fractional resolution enables fine frequency steps and ramp generation; integer-N devices cannot achieve sub-PFD step sizes. |
| Integrated VCO | No (external VCO required) | No (external VCO required) | Both require an external VCO, so board-level design for the VCO interface is comparable between the two parts. |
| Supply Voltage | 3.0 V to 3.6 V | 2.7 V to 3.3 V | Operating voltage range affects power rail compatibility and must be verified against the system supply before substitution. |
| Package | 32-lead LFCSP (5 mm x 5 mm) | 20-lead LFCSP (4 mm x 4 mm) | Different footprint and pin count mean the PCB layout cannot be shared; a redesign is required for substitution. |
| Ramp / Sweep Generation | Yes (integrated ramp generation for FMCW) | No | Integrated ramp capability is essential for radar/FMCW applications and is absent in the integer-N device. |
| Phase Noise (Normalized, typical) | -220 dBc/Hz (normalized floor, typical) | -219 dBc/Hz (normalized floor, typical) | Normalized phase noise floor indicates synthesizer noise contribution; similar values suggest comparable noise performance in a given loop. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4159CCPZ-RL7 | ADF4107BCP |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | - | Clock/Frequency Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | CMOS, TTL | CMOS |
| Output | CMOS | Clock |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 13GHz | 7GHz |
| Divider / Multiplier | Yes/Yes | No/No |
| Voltage - Supply | 1.62V ~ 3.45V | 2.7V ~ 3.3V |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Circuits | 1 | - |
| Operating Temperature | -40°C ~ 125°C | - |
Frequently asked questions
What are the primary functional differences between the ADF4159CCPZ-RL7 and the ADF4107BCP?
The ADF4159CCPZ-RL7 is a 13 GHz fractional-N frequency synthesizer featuring a 25-bit fixed-modulus fractional divider and integrated ramp generation for FMCW radar applications. The ADF4107BCP is a 7 GHz integer-N PLL frequency synthesizer with a programmable dual-modulus prescaler (8/9, 16/17, 32/33, 64/65) and a 4-bit reference counter, intended for general-purpose integer-N synthesis.
Do the ADF4159CCPZ-RL7 and ADF4107BCP share the same package and pinout?
Both devices are offered in a 20-lead LFCSP package, but they are not pin-for-pin interchangeable. The ADF4159CCPZ-RL7 includes additional pins for ramp and modulation functions (such as TXDATA and CLK), and the register map and control interface differ from the ADF4107BCP. PCB layout and firmware must be redesigned accordingly.
What is the maximum RF input frequency for each device?
The ADF4159CCPZ-RL7 supports RF input frequencies up to 13 GHz. The ADF4107BCP supports RF input frequencies up to 7 GHz. Designs requiring operation above 7 GHz must use the ADF4159CCPZ-RL7 or an external prescaler with the ADF4107BCP.
Which device supports fractional-N operation and ramp generation?
Only the ADF4159CCPZ-RL7 supports fractional-N operation, with a 25-bit fixed-modulus fractional divider, and includes integrated ramp generation for FMCW radar and frequency sweep applications. The ADF4107BCP is an integer-N synthesizer and does not provide fractional division or ramp generation.
Are the reference input and phase detector specifications the same for both parts?
No. The ADF4159CCPZ-RL7 has a maximum phase detector frequency of 32 MHz and a reference input frequency up to 250 MHz. The ADF4107BCP has a maximum phase detector frequency of 104 MHz and a reference input frequency up to 250 MHz. The higher phase detector frequency of the ADF4107BCP supports wider loop bandwidths in integer-N designs.
Can the ADF4159CCPZ-RL7 be used as a drop-in replacement for the ADF4107BCP in an existing integer-N design?
No. Although both are 20-lead LFCSP synthesizers, the ADF4159CCPZ-RL7 uses a different register map, requires fractional-N configuration, and includes ramp-related pins not present on the ADF4107BCP. A direct drop-in replacement is not possible without schematic, layout, and firmware changes validated against the respective datasheets.
What are the typical supply voltage and current consumption for each device?
Both devices operate from a nominal 3.0 V to 3.6 V supply. The ADF4159CCPZ-RL7 typically draws about 35 mA from the 3.3 V supply (excluding the VCO and external circuitry). The ADF4107BCP typically draws about 20 mA from the 3.3 V supply. Actual current depends on configuration and external components.
Which device is better suited for FMCW radar and which for general-purpose frequency synthesis?
The ADF4159CCPZ-RL7 is specifically designed for FMCW radar and frequency-modulated applications due to its integrated ramp generation, 13 GHz operation, and fractional-N capability. The ADF4107BCP is better suited for general-purpose integer-N frequency synthesis up to 7 GHz where low phase noise and simple integer-N operation are required.