Part A
ADF4106BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4854 Stückzahl
- Package
- TSSOP-16
- Series
- Clock-Timing mit Taktgeneratoren, PLLs, Frequenzsynthesizer
Replacement verdict
Compatible functional replacement candidate
The ADF4106BRU and ADF4110BRU-REEL are both integer-N PLL frequency synthesizers from Analog Devices in the same 16-lead TSSOP package, sharing identical supply voltage ranges, interface type, and pinout. The ADF4110BRU-REEL offers a higher maximum RF input frequency (550 MHz vs 6 GHz for the ADF4106BRU), making it a viable functional substitute in lower-frequency applications, though the ADF4106BRU is preferred where higher frequency operation is required. Designers should validate the frequency plan and loop filter against the target specifications before substitution.
Maximum RF Input Frequency
Validation required
Package Type
High match
Supply Voltage Range
High match
Interface Type
High match
Parts at a glance
Part B
ADF4110BRU-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3382 Stückzahl
- Package
- TSSOP-16
- 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 | ADF4106BRU | ADF4110BRU-REEL | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 6 GHz | 550 MHz | Defines the highest frequency the PLL synthesizer can operate at; the ADF4106 supports much higher frequencies, so it is not a drop-in replacement for higher-band designs using the ADF4110. |
| Prescaler | 8/9, 16/17, 32/33, 64/65 | 32/33 | The prescaler ratio affects the achievable division range and loop characteristics; the ADF4106 offers multiple selectable prescalers while the ADF4110 is fixed at 32/33. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail; the ADF4110 tolerates higher supply voltages, so it can be used in 5 V systems where the ADF4106 cannot. |
| Normalized Phase Noise Floor | -219 dBc/Hz | -211 dBc/Hz | A lower phase noise floor yields cleaner synthesized signals; the ADF4106 provides better noise performance, which matters for sensitive RF applications. |
| Maximum RF Input Frequency (Reference) | 6 GHz | 550 MHz | Confirms the frequency ceiling difference; designs targeting bands above 550 MHz cannot substitute the ADF4110 for the ADF4106. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Package footprint and pinout must match for board-level interchangeability; both share the same TSSOP package, easing physical substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures the device meets the environmental requirements of the target application; identical ranges mean equivalent thermal robustness. |
| Charge Pump Current (Programmable) | 0.625 mA to 5 mA | 0.625 mA to 5 mA | Charge pump current sets loop bandwidth and lock time; matching ranges allow similar loop filter design and dynamic performance. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4106BRU | ADF4110BRU-REEL |
|---|---|---|
| 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 are the key differences between the ADF4106BRU and ADF4110BRU-REEL?
The ADF4106BRU is a 6 GHz PLL frequency synthesizer with a 10-bit programmable reference divider and a 16-bit programmable feedback counter, while the ADF4110BRU-REEL is a 550 MHz PLL frequency synthesizer with a 14-bit programmable reference divider and a 16-bit programmable feedback counter. The ADF4106BRU supports higher RF input frequencies, whereas the ADF4110BRU-REEL is optimized for lower-frequency applications.
Are the ADF4106BRU and ADF4110BRU-REEL pin-compatible?
Both devices are offered in a 16-lead TSSOP package (RU suffix), and Analog Devices documents them with the same pinout for the TSSOP option. However, designers should verify the pin functions against the respective datasheets before substituting, since electrical specifications and internal divider configurations differ.
What is the maximum RF input frequency for each device?
The ADF4106BRU has a maximum RF input frequency of 6 GHz. The ADF4110BRU-REEL has a maximum RF input frequency of 550 MHz. These values are specified in the respective Analog Devices datasheets.
What supply voltage range do the ADF4106BRU and ADF4110BRU-REEL require?
Both devices operate from a single supply of 2.7 V to 3.3 V, as specified in the Analog Devices datasheets for the ADF4106 and ADF4110 families.
What is the difference in the reference divider between the two parts?
The ADF4106BRU features a 10-bit programmable reference counter (R counter), allowing reference division ratios up to 1023. The ADF4110BRU-REEL features a 14-bit programmable reference counter, allowing reference division ratios up to 16383. This affects the achievable phase detector comparison frequency and step size for a given reference input.
Can the ADF4110BRU-REEL be used as a drop-in replacement for the ADF4106BRU in an existing 6 GHz design?
No. The ADF4110BRU-REEL has a maximum RF input frequency of 550 MHz, so it cannot operate at the higher RF frequencies supported by the ADF4106BRU (up to 6 GHz). Additionally, the reference divider bit width differs, so loop filter and register settings would need to be recalculated.
What package and ordering options are available for these parts?
Both the ADF4106BRU and ADF4110BRU-REEL are supplied in a 16-lead TSSOP package. The ADF4106BRU is typically ordered in tube form, while the ADF4110BRU-REEL suffix indicates tape-and-reel packaging for automated assembly. Designers should confirm current ordering codes with Analog Devices or an authorized distributor.