Part A
ADF4110BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2777 Stückzahl
- Package
- TSSOP-16
- Series
- Clock-Timing mit Taktgeneratoren, PLLs, Frequenzsynthesizer
Replacement verdict
Compatible functional replacement candidate
The ADF4110BRUZ and ADF4116BRU are both single-channel integer-N PLL frequency synthesizers from Analog Devices in the same 16-lead TSSOP package, sharing a common pinout and 3 V to 5.5 V supply range, so the ADF4116BRU can serve as a functional replacement candidate for the ADF4110BRUZ in many designs. However, the two devices differ in maximum RF input frequency and programmable modulus range, so the target frequency plan and loop configuration must be validated before substitution.
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
ADF4116BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6377 Stückzahl
- 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 | ADF4110BRUZ | ADF4116BRU | Why it matters |
|---|---|---|---|
| Maximum Operating Frequency | 1.0 GHz | 1.2 GHz | Determines the highest RF input frequency the PLL synthesizer can lock to; a higher limit allows use in higher-band applications. |
| Number of Programmable Modulus Prescaler | Dual-modulus 8/9, 16/17, 32/33, 64/65 | Dual-modulus 8/9, 16/17, 32/33, 64/65 | Prescaler options affect the achievable division ratios and loop performance across different frequency bands. |
| RF Input Sensitivity | -10 dBm typical | -10 dBm typical | Defines the minimum RF input power needed for reliable operation; lower sensitivity requirements ease system-level design. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail and whether the device can operate from common 3.3 V or 5 V supplies. |
| Package / Mounting Type | 16-TSSOP (Surface Mount) | 16-TSSOP (Surface Mount) | Package and mounting style must match the PCB footprint for a drop-in replacement. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Ensures the device meets the environmental requirements of the target application. |
| 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; programmability allows loop optimization. |
| Phase Detector Frequency | Up to 55 MHz | Up to 55 MHz | Sets the maximum comparison frequency, which affects phase noise and reference spurious performance. |
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 | ADF4110BRUZ | ADF4116BRU |
|---|---|---|
| Part Status | Active | Obsolete |
| Digi Key Programmable | - | Not Verified |
| 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 | 550MHz | 550MHz |
| Divider / Multiplier | Yes/No | Yes/No |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | ADF4116 |
Frequently asked questions
What are the key differences between the ADF4110BRUZ and ADF4116BRU?
The ADF4110BRUZ is a fractional-N PLL frequency synthesizer with an integrated VCO, while the ADF4116BRU is an integer-N PLL frequency synthesizer without an integrated VCO. The ADF4110BRUZ supports fractional-N operation for finer frequency resolution, whereas the ADF4116BRU requires an external VCO and operates in integer-N mode.
Are the ADF4110BRUZ and ADF4116BRU pin-compatible?
No, they are not pin-compatible. The ADF4110BRUZ is housed in a 16-lead TSSOP package, while the ADF4116BRU is housed in a 16-lead TSSOP package as well, but the pin functions differ due to the integrated VCO in the ADF4110BRUZ versus the external VCO interface in the ADF4116BRU. Designers must verify pin assignments against the respective datasheets before considering any layout reuse.
What is the frequency range of the ADF4110BRUZ integrated VCO?
The ADF4110BRUZ integrates a VCO with a fundamental frequency range of approximately 2.4 GHz to 2.7 GHz, and it includes divide-by-2 and divide-by-4 prescalers to extend the usable output range down to approximately 600 MHz. Designers should confirm the exact tuning range and prescaler settings from the official Analog Devices datasheet for their specific operating conditions.
Does the ADF4116BRU include an integrated VCO?
No, the ADF4116BRU does not include an integrated VCO. It is an integer-N PLL synthesizer that requires an external VCO and loop filter to complete the frequency synthesis loop. This makes the ADF4116BRU more flexible for custom VCO selection but requires additional board space and design effort compared to the ADF4110BRUZ.
What is the maximum operating frequency of the ADF4116BRU?
The ADF4116BRU supports RF input frequencies up to 1.2 GHz at the RF input port, with an on-chip prescaler (8/9 or 16/17) to accommodate higher VCO frequencies. The exact maximum frequency depends on the selected prescaler and external VCO. Designers should refer to the Analog Devices ADF4116 datasheet for verified limits under specific supply and temperature conditions.
Can the ADF4110BRUZ and ADF4116BRU share the same reference input?
Both devices accept a reference input signal, typically from a TCXO or crystal oscillator, and both include a reference divider. However, the ADF4110BRUZ supports fractional-N operation with a programmable modulus, while the ADF4116BRU uses integer-N division. The reference input specifications (frequency, amplitude, and input impedance) should be verified separately from each datasheet to ensure compatibility with the chosen reference source.
Which device is better suited for low phase noise applications?
The ADF4116BRU, as an integer-N synthesizer with an external VCO, can achieve lower phase noise when paired with a high-performance external VCO and optimized loop filter, because integer-N architectures typically offer better in-band phase noise performance than fractional-N architectures. The ADF4110BRUZ, with its integrated VCO and fractional-N capability, offers convenience and finer resolution but may exhibit higher fractional spurs. The best choice depends on the specific phase noise and spur requirements of the application, and both should be evaluated against verified datasheet phase noise plots.
What supply voltage do the ADF4110BRUZ and ADF4116BRU require?
Both the ADF4110BRUZ and ADF4116BRU operate from a single supply voltage of 2.7 V to 3.3 V, with a nominal 3.0 V or 3.3 V rail. The ADF4110BRUZ also includes an integrated VCO that operates from the same supply. Designers should confirm the exact supply voltage range and current consumption from the respective Analog Devices datasheets, as these parameters may vary by grade and operating conditions.