Part A
ADF4107BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2399 PCS
- Series
- Clock-Timing - Clock Generators, PLLs, Frequency Synthesizers
Replacement verdict
Compatible functional replacement candidate
The ADF4107BRU and ADF4117BRU 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 ADF4117BRU offers a lower maximum RF input frequency (1.2 GHz versus 7 GHz) and a lower maximum PFD frequency (55 MHz versus 104 MHz), so it can serve as a functional substitute for the ADF4107BRU only in applications operating within its reduced frequency limits. Designers must validate RF input frequency, PFD frequency, and loop filter component values before substituting.
Maximum RF Input Frequency
Validation required
Maximum PFD Frequency
Validation required
Package Type
High match
Supply Voltage Range
High match
Parts at a glance
Part B
ADF4117BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6977 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 | ADF4107BRU | ADF4117BRU | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 4 GHz | 1.2 GHz | Determines the highest frequency the PLL synthesizer can operate at; the ADF4107 supports much higher frequency bands than the ADF4117. |
| Prescaler | 4/5, 8/9 | 8/9, 16/17, 32/33 | The prescaler ratio affects the achievable division range and loop performance; different options mean different frequency planning flexibility. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 5.5 V | A wider supply range allows the ADF4117 to operate in 5 V systems, while the ADF4107 is limited to 3.3 V nominal supplies. |
| Maximum Operating Frequency (PFD) | 55 MHz | 55 MHz | Phase frequency detector rate influences loop bandwidth and settling time; both parts share the same PFD limit. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Identical package and pinout allow drop-in board compatibility between the two devices. |
| Number of Programmable Counters | Dual (A and B) | Dual (A and B) | Dual modulus counters enable flexible N-division; both parts offer the same counter architecture. |
| Charge Pump Current (Programmable) | Up to 5 mA | Up to 5 mA | Charge pump current sets loop gain and phase noise performance; matching values support similar loop filter design. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range ensures reliable operation in harsh environments; both parts are rated identically. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4107BRU | ADF4117BRU |
|---|---|---|
| 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 | 7GHz | 1.2GHz |
| Divider / Multiplier | No/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 |
| Base Product Number | ADF4107 | - |
| Digi Key Programmable | Not Verified | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the ADF4107BRU and ADF4117BRU PLL frequency synthesizers?
Both are Analog Devices integer-N PLL frequency synthesizers in 16-lead TSSOP packages, but they differ in maximum RF input frequency and prescaler architecture. The ADF4107BRU operates up to 7 GHz with a 4/5 or 8/9 dual-modulus prescaler, while the ADF4117BRU operates up to 1.2 GHz with a fixed 32/33 prescaler. The ADF4107 also supports a wider RF input frequency range and different charge pump and phase detector characteristics per the respective datasheets.
Are the ADF4107BRU and ADF4117BRU pin-compatible?
Both devices are offered in a 16-lead TSSOP (RU suffix) package with the same pin count, but pin functions and assignments must be verified against each device's official datasheet before assuming drop-in compatibility. Analog Devices datasheets should be consulted to confirm the pinout for each specific part.
What is the maximum RF input frequency for each device?
Per Analog Devices datasheets, the ADF4107BRU supports RF input frequencies up to 7 GHz, while the ADF4117BRU supports RF input frequencies up to 1.2 GHz. The applicable maximum depends on the prescaler setting and supply voltage specified in each datasheet.
What prescaler options are available on the ADF4107BRU versus the ADF4117BRU?
The ADF4107BRU offers selectable 4/5 and 8/9 dual-modulus prescaler options, allowing flexibility across a wide frequency range. The ADF4117BRU uses a fixed 32/33 dual-modulus prescaler. These differences affect modulus selection and loop design for a given output frequency.
Can the ADF4117BRU be used as a direct replacement for the ADF4107BRU in an existing design?
Not without verification. Because the two devices differ in maximum RF input frequency (7 GHz vs 1.2 GHz), prescaler architecture, and potentially register and pin details, a direct substitution requires confirming that the target design's frequency plan, loop filter, and register programming are compatible with the ADF4117BRU per its datasheet.
What supply voltage range do the ADF4107BRU and ADF4117BRU require?
Both devices are specified for a 3.0 V to 3.6 V supply range per Analog Devices datasheets. Designers should confirm the exact operating conditions and any additional supply requirements in the respective datasheet before finalizing a design.
Do both parts use the same serial interface for programming?
Both the ADF4107BRU and ADF4117BRU use a three-wire serial interface (CLK, DATA, LE) for register programming, consistent with the Analog Devices ADF41xx family. However, register bit definitions and programming sequences should be verified individually against each device's datasheet, as they are not guaranteed to be identical.