| ADF41513, usable for 26.5GHz LO implementation
| ADP1031, Flyback-Inverting-Buck Power Rail Provided

Implementing a 26.5GHz local oscillator
Ultra-low noise frequency synthesizer ADF41513
The ADF41513 is an ultra-low noise frequency synthesizer that can be used to implement a high-frequency local oscillator (LO) of 26.5 GHz in the up/down conversion area of a wireless receiver and transmitter.


This product is suitable for applications such as test and measurement equipment, wireless infrastructure, microwave P2P, and multipoint RF.

The ADF41513 is designed using a high-performance SiGe BiCMOS process and typically exhibits a phase noise level of -235 dBc/Hz.

The phase frequency detector (PFD) can operate up to 250 MHz (integer-N mode) and 125 MHz (real-N mode) for improved phase noise and spurious performance.

The variable coefficient Σ-Δ modulator enables very high resolution implementation when using 49-bit divided values.

ADF41513 is an integer-N PLLIt can be used as a real-N PLL with fixed factors for sub-Hz frequency resolution or variable factors for accurate sub-Hz frequency resolution.

If this frequency synthesizer is used with an external loop filter, a VCO (voltage controlled oscillator), a perfect PLL can be implemented.

Since it supports a bandwidth of 26.5GHz, there is no need for frequency multipliers or dividers, so the system architecture is simple and costs can be reduced.

The ADF41513 is supplied in a compact 24-pin 4mm x 4mm LFCSP package.


ADP1031 PMU, provides 3 isolated power rails
The ADP1031 is a high-performance isolated micro power management unit (PMU) that combines an isolated flyback DC/DC regulator, an inverting DC/DC regulator, and a buck DC/DC regulator to provide three isolated power rails.

In addition, the ADP1031 includes four high-speed SPI isolated channels and three general-purpose isolators for channel-to-channel applications requiring low heat generation and small solution size.

Key applications include industrial automation, process control, instrumentation, data acquisition systems, data, and electricalOriginal insulation, etc. are included.

The ADP1031, operating within an input voltage range of +4.5V to +60V, generates an isolated output voltage of +6V to +28V (variable version) or +21V to +24V (fixed version) to VOUT1.

VOUT2 generates a buck output voltage of +5.15V, +5.0V, or +3.3V that can be programmed before shipment, and VOUT3 generates an adjustable output voltage of -24V to -5V.

Basically, the ADP1031 flyback regulator operates at a switching frequency of 250 kHz, and the buck and inverting regulators operate at 125 kHz.

All three of these regulators have frequency phase shifted between each channel to reduce EMI.

The ADP1031 can be driven by an external oscillator in the range of 350kHz to 750kHz to facilitate noise filtering in sensitive applications.

The digital isolator embedded in the ADP1031 uses ADI's iCoupler chip-scale transformer technology, which is optimized for low power and low EMI radiation. The ADP1031 is supplied as a 41-pin LFCSP measuring 9mm x 7mm, with a junction temperature range of -40°C to +125°C.