Part A
ADF4106BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2980 Stückzahl
- Package
- TSSOP-16
- Series
- Clock-Timing mit Taktgeneratoren, PLLs, Frequenzsynthesizer
Replacement verdict
Compatible functional replacement candidate
The ADF4106BRUZ and ADF4112BRU are both single PLL frequency synthesizers in the same TSSOP-16 package and share a common functional architecture, making the ADF4112BRU a viable functional replacement candidate for the ADF4106BRUZ in many designs. However, the two devices differ in maximum operating frequency and supply voltage range, so the replacement should be validated against the target application's RF and power requirements before adoption.
Maximum Operating Frequency
Validation required
Supply Voltage Range
Validation required
Package Type
High match
Function Architecture
High match
Parts at a glance
Part B
ADF4112BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4577 Stückzahl
- Package
- TSSOP-16
- 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 | ADF4106BRUZ | ADF4112BRU | Why it matters |
|---|---|---|---|
| Maximum RF Input Frequency | 6 GHz | 3 GHz | Determines the highest frequency the PLL synthesizer can lock to; the ADF4106 supports higher-frequency VCOs and applications. |
| Maximum PFD (Phase Frequency Detector) Frequency | 104 MHz | 55 MHz | A higher PFD frequency allows wider loop bandwidth and faster settling, affecting phase noise and lock time performance. |
| RF Input Sensitivity Range | -10 dBm to +5 dBm (typical) | -5 dBm to +5 dBm (typical) | Defines the input power window over which the prescaler reliably divides; affects compatibility with different VCO output levels. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 5.5 V | Determines system power rail compatibility; the ADF4112 supports 5 V systems while the ADF4106 is limited to 3.3 V. |
| Supply Current (typical) | 7.5 mA | 4.5 mA | Affects power budget and thermal design; the ADF4112 consumes less current, beneficial for low-power designs. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Footprint and pinout compatibility; identical package allows potential board-level substitution with minimal layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Ensures reliable operation across industrial temperature environments; identical range means equivalent environmental robustness. |
| Prescaler | Dual-modulus 8/9, 16/17, 32/33, 64/65 | Dual-modulus 8/9, 16/17, 32/33, 64/65 | Prescaler options determine achievable division ratios and loop frequency planning; identical options mean equivalent synthesis flexibility. |
| Charge Pump Current (programmable) | 0.625 mA to 5 mA | 0.625 mA to 5 mA | Charge pump current sets loop gain and affects phase noise and settling; identical range allows similar loop filter design. |
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 | ADF4106BRUZ | ADF4112BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | 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 | 6GHz | 3GHz |
| Divider / Multiplier | Yes/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 |
Frequently asked questions
What are the key differences between the ADF4106BRUZ and ADF4112BRU?
The ADF4106BRUZ is a 6 GHz PLL frequency synthesizer with a 24-bit modulus, while the ADF4112BRU is a 3 GHz PLL synthesizer with a 13-bit modulus. The ADF4106BRUZ supports higher RF input frequencies and offers finer frequency resolution, whereas the ADF4112BRU is limited to lower frequency operation and coarser modulus resolution.
Are the ADF4106BRUZ and ADF4112BRU pin-compatible?
Both devices are offered in 16-lead TSSOP packages (RU suffix), and their pinouts are functionally similar as PLL synthesizers. However, direct substitution requires verification of the specific pin functions and external loop filter component values against the respective datasheets, since the internal charge pump and modulus settings differ.
What is the maximum RF input frequency for each device?
The ADF4106BRUZ supports RF input frequencies up to 6 GHz. The ADF4112BRU supports RF input frequencies up to 3 GHz. Designs requiring operation above 3 GHz must use the ADF4106BRUZ or another higher-frequency device.
How do the modulus resolutions of the two synthesizers compare?
The ADF4106BRUZ features a 24-bit modulus (fractional-N), enabling finer frequency step resolution. The ADF4112BRU uses a 13-bit modulus, which provides coarser resolution. This difference affects the achievable frequency step size and phase noise performance in a given design.
Can the ADF4112BRU be used as a drop-in replacement for the ADF4106BRUZ?
No. The ADF4112BRU has a lower maximum RF input frequency (3 GHz vs 6 GHz) and a different modulus resolution (13-bit vs 24-bit). A drop-in replacement is not valid without revalidating the RF frequency plan, loop filter design, and register configuration against the ADF4112BRU datasheet.
What package type do both devices use?
Both the ADF4106BRUZ and ADF4112BRU are supplied in 16-lead TSSOP packages, indicated by the RU suffix in the part number. The BRUZ suffix on the ADF4106BRUZ denotes RoHS-compliant packaging, while the ADF4112BRU part number does not carry the Z suffix.
Do both devices require an external loop filter?
Yes. Both the ADF4106BRUZ and ADF4112BRU are PLL frequency synthesizers that require an external loop filter and external VCO to form a complete frequency synthesis loop. The loop filter component values must be calculated separately for each device based on its charge pump current, modulus, and target loop bandwidth.