Part A
ADF4106BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4854 PCS
- Package
- TSSOP-16
- Series
- Clock-Timing - Clock Generators, PLLs, Frequency Synthesizers
Replacement verdict
Compatible functional replacement candidate
The ADF4106BRU and ADF4110BRU are both single PLL frequency synthesizers from Analog Devices in the same 16-lead TSSOP package, sharing a common pinout and 3 V supply architecture, so the ADF4110BRU can serve as a functional replacement candidate for the ADF4106BRU in many designs. However, the two devices differ in maximum operating frequency and RF input sensitivity, and the ADF4110BRU offers a lower maximum RF input frequency, so the replacement must be validated against the target frequency plan and loop filter design before adoption.
Maximum Operating Frequency
Validation required
Package Type
High match
Supply Voltage Range
High match
RF Input Sensitivity
Validation required
Parts at a glance
Part B
ADF4110BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4814 PCS
- Package
- TSSOP-16
- Series
- Clock-Timing - Clock Generators, PLLs, Frequency Synthesizers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4106BRU | ADF4110BRU | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 6 GHz | 1.1 GHz | Defines the highest frequency the PLL synthesizer can operate at; the ADF4106 supports much higher frequency bands, so it is not a direct substitute in high-frequency designs. |
| Minimum RF Input Frequency | 0.5 GHz | 0.08 GHz | Determines the lowest usable input frequency; the ADF4110 can operate at much lower frequencies, affecting low-band applications. |
| Maximum PFD Frequency | 104 MHz | 55 MHz | The phase frequency detector maximum rate affects loop bandwidth, phase noise, and switching speed; a higher PFD allows faster settling and lower in-band noise. |
| Normalized Phase Noise Floor | -219 dBc/Hz | -211 dBc/Hz | A lower normalized phase noise floor yields better overall phase noise performance, which is critical for spectral purity in RF systems. |
| Normalized 1/f Noise (PN1/f) | -113 dBc/Hz | -110 dBc/Hz | Flicker noise close to the carrier impacts close-in phase noise; lower 1/f noise improves performance in narrow-loop-bandwidth designs. |
| Maximum RF Input Frequency (Prescaler) | 6 GHz | 1.1 GHz | The integrated prescaler limits the maximum input frequency; the ADF4106's higher prescaler range enables operation in microwave bands. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 5.5 V | The wider supply range of the ADF4110 allows operation at 5 V systems, while the ADF4106 is limited to 3.3 V, affecting system compatibility. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Package compatibility ensures the same PCB footprint can be used, which is important for drop-in replacement considerations. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings mean both parts suit the same environmental conditions, so thermal design does not constrain 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 | ADF4106BRU | ADF4110BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Type | Clock/Frequency Synthesizer (RF) | Clock/Frequency Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | CMOS, TTL | CMOS, TTL |
| Output | Clock | Clock |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 6GHz | 550MHz |
| Divider / Multiplier | Yes/No | Yes/No |
| Voltage - Supply | 2.7V ~ 3.3V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary functional difference between the ADF4106BRU and ADF4110BRU?
Both are integer-N PLL frequency synthesizers in 16-lead TSSOP packages, but they differ in maximum RF input frequency and prescaler architecture. The ADF4106BRU operates up to 6 GHz with a 8/9, 16/17, 32/33, or 64/65 dual-modulus prescaler, while the ADF4110BRU operates up to 550 MHz with an 8/9 or 16/17 dual-modulus prescaler, per Analog Devices datasheets.
Are the ADF4106BRU and ADF4110BRU pin-compatible?
Yes. Both devices are specified in the same 16-lead TSSOP (RU suffix) package with the same pinout, as documented in the Analog Devices ADF4106 and ADF4110 datasheets, allowing a common PCB footprint.
Can the ADF4110BRU be used as a drop-in replacement for the ADF4106BRU?
Not universally. Although pin-compatible, the ADF4110BRU has a lower maximum RF input frequency (550 MHz vs 6 GHz) and different prescaler options, so substitution is only valid when the target design operates within the ADF4110BRU's frequency range and its prescaler settings are supported.
What is the maximum RF input frequency for each device?
The ADF4106BRU supports RF input frequencies up to 6 GHz. The ADF4110BRU supports RF input frequencies up to 550 MHz, according to the respective Analog Devices datasheets.
Do both devices share the same digital interface and supply voltage range?
Yes. Both the ADF4106BRU and ADF4110BRU use a 3-wire serial interface (CLK, DATA, LE) and operate from a 2.7 V to 3.3 V supply, as specified in the Analog Devices datasheets for both parts.
What are the prescaler options available on each device?
The ADF4106BRU offers dual-modulus prescaler options of 8/9, 16/17, 32/33, and 64/65. The ADF4110BRU offers 8/9 and 16/17 dual-modulus prescaler options, per the Analog Devices datasheets.
Are the ADF4106BRU and ADF4110BRU suitable for the same application classes?
They serve overlapping but distinct applications. The ADF4106BRU is intended for higher-frequency systems such as wireless infrastructure and microwave radios up to 6 GHz, while the ADF4110BRU targets lower-frequency applications such as wireless handsets and base station equipment up to 550 MHz, based on Analog Devices product documentation.