Features and Benefits
- RF bandwidth to 6 GHz
- 25-bit fixed modulus allows subhertz frequency resolution
- 2.7 V to 3.3 V power supply
- Separate VP allows extended tuning voltage
- Programmable charge pump currents
- 3-wire serial interface
- Digital lock detect
- Power-down mode
- Pin compatible with the following frequency synthesizers: ADF4110/ADF4111/ADF4112/ADF4113 ADF4106/ADF4153/ADF4154/ADF4156
- Cycle slip reduction for faster lock times
Product DetailsThe ADF4157 is a 6 GHz fractional-N frequency synthesizer with a 25-bit fixed modulus, allowing subhertz frequency resolution at 6 GHz. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a Σ-Δ based fractional interpolator to allow programmable fractional-N division. The INT and FRAC values define an overall N divider, N = INT + (FRAC/225). The ADF4157 features cycle slip reduction circuitry, which leads to faster lock times without the need for modifications to the loop filter.
Control of all on-chip registers is via a simple 3-wire interface. The device operates with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.
- Satellite communications terminals, radar equipment
- Instrumentation equipment
- Personal mobile radio (PMR)
- Base stations for mobile radio
- Wireless handsets
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
This page contains ordering information for the evaluation board used to evaluate the ADF4157 High Resolution 6 GHz Fractional-N Frequency Synthesizer.
This evaluation board requires an SDP Controller board for connection to the PC. The SDP controller board connects to the PC via USB 2.0. The evaluation board will connect to the SDP controller board. The evaluation board cannot be connected directly to the PC. The evaluation software running on the PC will communicate through the SDP Controller board, to the evaluation board. The SDP Controller board is a separate list item in the ordering guide below (EVAL-SDP-CS1Z). If you have not previously purchased an SDP Controller board, please do so to ensure a full evaluation setup.
Software & Systems Requirements
Tools & Simulations
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
ADF4157 Companion Parts
Recommended Linear Regulators
- For a step up, 3V to 5V regulator: ADP1613.
- For high accuracy, 5V applications: ADP3334.
- For ultalow noise, 3V applications, 200mA output: ADP151.
- For ultralow noise, 3V applications,150mA output: ADP150.
Recommended Divide-by-4 Prescaler
- For a low noise, low power, fixed RF block: ADF5001.
Recommended PLL Active Filter
- For an ultralow noise, rail-to-rail amplifier: OP184.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.