Part A
ADF4107BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2399 PCS
- Series
- Horário - Geradores de relógios, PLLs, Sintetizadores de Frequências
Replacement verdict
Compatible functional replacement candidate
The ADF4107BRU and ADF4111BRU-REEL7 are both single PLL frequency synthesizers from Analog Devices in the same 16-lead TSSOP package, sharing a common 3-wire serial interface and 2.7 V to 3.3 V supply range, so the ADF4111BRU-REEL7 can serve as a functional replacement candidate for the ADF4107BRU in many designs. However, the two devices differ in maximum RF input frequency and programmable modulus range, so the replacement must be validated against the target frequency plan and loop filter design before adoption.
Package Type
High match
Supply Voltage Range
High match
Maximum RF Input Frequency
Validation required
Programmable Modulus Range
Validation required
Parts at a glance
Part B
ADF4111BRU-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8421 PCS
- Package
- TSSOP-16
- Series
- Horário - Geradores de relógios, PLLs, Sintetizadores de Frequências
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 | ADF4111BRU-REEL7 | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 7 GHz | 4 GHz | Determines the highest frequency the PLL synthesizer can operate at; the ADF4107 supports higher-frequency applications. |
| Number of Programmable Counters / Modulus | Dual-modulus prescaler 8/9, 16/17, 32/33, 64/65 | Dual-modulus prescaler 8/9, 16/17, 32/33, 64/65 | Prescaler options affect the achievable division ratios and loop performance for a given reference and output frequency. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 3.3 V | Defines the operating voltage window; both parts are compatible with 3 V systems. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Package footprint and pinout must match for board-level substitutability. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Ensures reliable operation across the intended environmental conditions. |
| Charge Pump Current (Programmable) | Programmable, up to 5 mA | Programmable, up to 5 mA | Charge pump current influences loop bandwidth, phase noise, and lock time. |
| Reference Input Frequency | Up to 250 MHz | Up to 250 MHz | Sets the maximum reference clock the phase detector can accept. |
| Interface | 3-wire serial (SPI-compatible) | 3-wire serial (SPI-compatible) | Programming interface compatibility is required for firmware and host controller reuse. |
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 | ADF4107BRU | ADF4111BRU-REEL7 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Type | Clock/Frequency Synthesizer (RF) | Clock/Frequency Synthesizer (RF) |
| PLL | Yes | Yes |
| Input | CMOS, TTL | Clock |
| Output | Clock | Clock |
| 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 |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | ADF4107 | - |
| Digi Key Programmable | Not Verified | - |
| Number of Circuits | 1 | - |
| Operating Temperature | -40°C ~ 85°C | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the ADF4107BRU and ADF4111BRU-REEL7?
The ADF4107BRU is a 7 GHz fractional-N PLL frequency synthesizer, while the ADF4111BRU-REEL7 is a 1.2 GHz integer-N PLL frequency synthesizer. The ADF4107 supports fractional-N operation for finer frequency resolution, whereas the ADF4111 is an integer-N device. Both are offered in 16-lead TSSOP packages and operate from a 2.7 V to 3.3 V supply.
What is the maximum RF input frequency for each device?
The ADF4107BRU has a maximum RF input frequency of 7 GHz. The ADF4111BRU-REEL7 has a maximum RF input frequency of 1.2 GHz.
Do both parts use the same package and pinout?
Both devices are supplied in a 16-lead TSSOP package. However, pin functions and internal architecture differ between the fractional-N ADF4107 and the integer-N ADF4111, so the pinouts are not identical and direct drop-in substitution should not be assumed without reviewing the respective datasheets.
What is the difference between fractional-N and integer-N operation in these parts?
The ADF4107BRU uses fractional-N architecture, allowing a fractional modulus to achieve finer frequency step resolution relative to the phase detector frequency. The ADF4111BRU-REEL7 uses integer-N architecture, where the output frequency is an integer multiple of the phase detector frequency, resulting in coarser step resolution for a given phase detector frequency.
What supply voltage range do these synthesizers require?
Both the ADF4107BRU and ADF4111BRU-REEL7 operate from a supply voltage range of 2.7 V to 3.3 V, as specified in the Analog Devices datasheets.
Can the ADF4111BRU-REEL7 be used as a replacement for the ADF4107BRU in an existing design?
Direct replacement is not recommended without validation. The ADF4111 is limited to 1.2 GHz RF input and uses integer-N operation, whereas the ADF4107 supports up to 7 GHz and fractional-N operation. Frequency plan, loop filter design, and register programming differ, so the design must be re-verified against the ADF4111 datasheet before substitution.
What is the significance of the REEL7 suffix on the ADF4111BRU-REEL7?
The REEL7 suffix indicates the device is supplied in tape-and-reel packaging, typically in 7-inch reels, which is intended for automated pick-and-place assembly. The base part, ADF4111BRU, refers to the same device in tube or tray packaging.