The 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 registers 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.

Applications

Satellite communications terminals, radar equipment

Instrumentation equipment

Personal mobile radio (PMR)

Base stations for mobile radio

Wireless handsets

Part#	Modulation Mode	Output Frequency Range	Maximum Data Rate (kbps)	Programmable Output Power	+10dBm Pwr Consumption	Package	Price* (1000-4999)
ADF7010	FSK/ASK/GFSK	902-928 MHz	76	-20dBm to +10dBm	30mA	24-Lead Tssop	$1.67
ADF7011	FSK/ASK/GFSK	433-435MHz, 866-870MHz	76	-20dBm to +10dBm	30mA	24-Lead Tssop	$1.67
ADF7012	FSK/ASK/GFSK	50-1000 MHz	150	-16dBm to +13dBm	21mA	24-Lead Tssop	$1.50
ADF7020	FSK/ASK/GFSK	431-478 MHz, 862-956 MHz	200	-16dBm to +13dBm	19mA	48-Lead CSP	$2.20
ADF7020-1	ASK/FSK/OOK, FSK/ASK/GFSK	135MHz to 650MHz.	200	-16dBm to +13dBm	27mA	48-Lead CSP	$2.20
ADF7021	2FSK, 3FSK, 4FSK	80-650 MHz, 862-940 MHz	25	-16dBm to +13dBm	28mA	48-Lead CSP	$2.85
ADF7021-N	2FSK, 3FSK, 4FSK	80-650 MHz, 842-916 MHz	24	-16dBm to +13dBm	29.2mA	48-Lead CSP	$2.85
ADF7025	FSK	431-464 MHz, 862-870 MHz , 902-928 MHz	384	-16dBm to +13dBm	27mA	48-Lead CSP	$2.85
ADF7901	ASK/FSK/OOK	369.5MHz-395.9MHz	20	'+5dBm to +14dBm	21mA	24-Lead Tssop	$1.50
ADF7902	FSK	369.5MHz-395.9MHz	2	-	-	24-Lead Tssop	$1.50

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

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.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.