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 ADF4153BRU are both single PLL frequency synthesizers in a 16-lead TSSOP package with a compatible 3-wire serial interface and overlapping 2.7 V to 3.3 V supply range, making the ADF4153BRU a viable functional replacement candidate for the ADF4107BRU in many designs. However, the two devices differ in maximum operating frequency, modulus resolution, and phase detector characteristics, so the replacement must be validated against the target loop bandwidth, frequency plan, and phase noise budget before adoption.
Maximum Operating Frequency
Validation required
Fractional Modulus Resolution
Validation required
Package Type
High match
Serial Interface
High match
Parts at a glance
Part B
ADF4153BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6126 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 | ADF4153BRU | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 4 GHz | 4 GHz | Determines the highest frequency the PLL synthesizer can operate at; both support up to 4 GHz. |
| Number of Programmable Modulus Bits (Fractional) | Integer-N only | Fractional-N (25-bit) | Fractional-N capability allows finer frequency resolution and lower phase noise compared to integer-N architectures. |
| Phase Detector Frequency | Up to 104 MHz | Up to 32 MHz | Higher phase detector frequency generally enables faster lock times and lower in-band phase noise. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 3.3 V | Both operate over the same supply range, allowing similar power supply design. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Identical package footprint enables drop-in board compatibility. |
| Charge Pump Current | Programmable (up to 5 mA) | Programmable (up to 5 mA) | Charge pump current affects loop filter design and lock time; both offer programmable current up to 5 mA. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Both support industrial temperature ranges, suitable for the same environments. |
| Interface | 3-wire SPI | 3-wire SPI | Same serial interface simplifies firmware and microcontroller compatibility. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4107BRU | ADF4153BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Type | Clock/Frequency Synthesizer (RF) | Fractional N 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 | 4GHz |
| Divider / Multiplier | No/No | No/Yes |
| Voltage - Supply | 2.7V ~ 3.3V | 2.7V ~ 3.3V |
| 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 functional differences between the ADF4107BRU and ADF4153BRU?
The ADF4107BRU is an integer-N PLL frequency synthesizer with an integrated prescaler, operating up to 7 GHz, while the ADF4153BRU is a fractional-N PLL synthesizer operating up to 4 GHz. The ADF4153BRU supports fractional-N operation for finer frequency resolution, whereas the ADF4107BRU uses integer-N architecture.
Do the ADF4107BRU and ADF4153BRU use the same package and pinout?
Both devices are offered in a 16-lead TSSOP package (RU suffix). However, pin functions and register maps differ between the two devices, so they are not pin-for-pin drop-in replacements despite sharing the same package outline.
What is the maximum RF input frequency for each device?
The ADF4107BRU supports RF input frequencies up to 7 GHz. The ADF4153BRU supports RF input frequencies up to 4 GHz. Designs requiring operation above 4 GHz must use the ADF4107BRU or another device rated for the target frequency.
Which device offers fractional-N operation?
The ADF4153BRU is a fractional-N PLL synthesizer, allowing finer frequency step resolution than integer-N architectures. The ADF4107BRU is an integer-N synthesizer and does not provide fractional-N operation.
Are the ADF4107BRU and ADF4153BRU software register compatible?
No. The two devices have different register maps and programming interfaces. Firmware and register configurations written for one device cannot be reused directly for the other without modification according to the respective datasheets.
Can the ADF4153BRU directly replace the ADF4107BRU in an existing design?
Not directly. Although both are 16-lead TSSOP devices, differences in maximum operating frequency (4 GHz vs 7 GHz), PLL architecture (fractional-N vs integer-N), and register maps require design and firmware validation before any substitution.
What supply voltage range do these devices require?
Both the ADF4107BRU and ADF4153BRU operate from a nominal 3 V supply, with an operating range of 2.7 V to 3.3 V as specified in their respective manufacturer datasheets.