Part A
ADF4153ABRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6452 PCS
- Package
- TSSOP-16
- Series
- Clock-Timing - Clock Generators, PLLs, Frequency Synthesizers
Replacement verdict
Compatible functional replacement candidate
The ADF4153ABRUZ and ADF4110BRU are both fractional-N PLL frequency synthesizers in a TSSOP-16 package with a compatible 3-wire serial interface and overlapping supply voltage ranges, making them a viable functional replacement candidate. However, the ADF4153ABRUZ offers a higher maximum RF input frequency and a wider operating temperature range, while the ADF4110BRU provides a higher maximum phase detector frequency. Designers should validate loop filter component values and charge pump current settings against the target application before substituting one for the other.
Package Type
High match
Serial Interface
High match
Supply Voltage Range
Validation required
Maximum RF Input Frequency
Validation required
Parts at a glance
Part B
ADF4110BRU
Công ty 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 | ADF4153ABRUZ | ADF4110BRU | Why it matters |
|---|---|---|---|
| Function Type | Fractional-N PLL frequency synthesizer | Integer-N PLL frequency synthesizer | Fractional-N allows finer frequency resolution without changing the reference, while integer-N requires a different loop design; this is the most fundamental substitutability difference. |
| Maximum RF Input Frequency | 4 GHz | 550 MHz | The maximum operating frequency determines whether the part can be used in the target band; the ADF4153 covers much higher frequencies. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 5.5 V | A wider supply range offers flexibility with 5 V systems; the ADF4153 is limited to 3.3 V operation. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Package compatibility affects PCB footprint and assembly; both share the same TSSOP footprint here. |
| Normalized Phase Noise Floor | -216 dBc/Hz | -211 dBc/Hz | Lower phase noise floor improves spectral purity of the synthesized signal, which is critical for RF system performance. |
| Programmable Modulus / Fractional Resolution | Fractional modulus 2 to 4095 (25-bit) | Integer-N only (no fractional modulus) | Fractional capability enables fine frequency steps and lower spurs; integer-N parts cannot achieve the same resolution without changing reference frequency. |
| Charge Pump Current | Programmable, up to 5 mA | Programmable, up to 5 mA | Charge pump current affects loop filter design and lock time; matching values ease loop redesign when substituting. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range compatibility ensures the part works in the same environmental conditions. |
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 | ADF4153ABRUZ | ADF4110BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Fractional N 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 | 4GHz | 550MHz |
| Divider / Multiplier | No/Yes | 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 primary functional differences between the ADF4153ABRUZ and the ADF4110BRU?
The ADF4153ABRUZ is a fractional-N frequency synthesizer with an integrated voltage-controlled oscillator (VCO) covering 2.2 GHz to 4.4 GHz, while the ADF4110BRU is an integer-N PLL frequency synthesizer without an integrated VCO, designed for use with an external VCO up to 550 MHz. The ADF4153ABRUZ supports fractional-N operation for finer frequency resolution, whereas the ADF4110BRU uses integer-N architecture.
Are the ADF4153ABRUZ and ADF4110BRU pin-compatible or package-compatible?
No. The ADF4153ABRUZ is supplied in a 20-lead TSSOP (RU-20) package, and the ADF4110BRU is supplied in a 16-lead TSSOP (RU-16) package. The different pin counts and pin functions prevent direct PCB footprint compatibility between the two devices.
What is the maximum operating frequency of each device?
The ADF4153ABRUZ integrates a VCO with an output frequency range of 2.2 GHz to 4.4 GHz. The ADF4110BRU is an integer-N PLL synthesizer specified for RF input frequencies up to 550 MHz, requiring an external VCO for the target frequency band.
Do both devices support the same serial interface for programming?
Both devices use a 3-wire serial interface (CLK, DATA, LE) for register programming, but their register maps and programming sequences differ because the ADF4153ABRUZ includes fractional-N registers (including modulus and fractional value settings) that the integer-N ADF4110BRU does not have. Firmware written for one device is not directly transferable to the other without modification.
What are the typical power supply requirements for each part?
The ADF4153ABRUZ operates from a 2.7 V to 3.3 V supply for the PLL section, with the integrated VCO requiring a separate supply in the same range. The ADF4110BRU operates from a 2.7 V to 5.5 V supply. Designers should verify the exact supply rail requirements against the respective manufacturer datasheets before finalizing the power design.
Can the ADF4110BRU be used as a drop-in replacement for the ADF4153ABRUZ in an existing design?
No. The devices differ in package pin count (16 vs 20 leads), frequency range, architecture (integer-N vs fractional-N with integrated VCO), and register map. A direct drop-in replacement is not possible; a redesign of the PCB footprint, loop filter, and control firmware would be required.
Which device is better suited for low phase noise applications requiring fine frequency steps?
The ADF4153ABRUZ, as a fractional-N synthesizer, supports finer frequency resolution through fractional modulus settings, which is advantageous when small frequency steps are required. The ADF4110BRU, being integer-N, has frequency resolution limited by the phase detector comparison frequency. Final phase noise performance depends on loop filter design, reference source, and VCO characteristics, and should be evaluated against the datasheet phase noise specifications for each device.