Overview
Features and Benefits
- IDD total, 7.5 mA
- Bandwidth RF/IF, 2.4 GHz/1.0 GHz
- 2.7 V to 3.3 V power supply
- Separate VP allows extended tuning voltage
- Programmable dual modulus prescaler RF and IF: 8/9, 16/17, 32/33, 64/65
- Programmable charge pump currents
- 3-wire serial interface
- Analog and digital lock detect
- Fastlock mode
- Power-down mode
- 20-lead TSSOP and 20-lead LFCSP packages
Product Details
The ADF4212L is a dual frequency synthesizer that can be used to implement local oscillators (LO) in the up-conversion and down-conversion sections of wireless receivers and transmitters. It can provide the LO for both the RF and IF sections. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, a programmable reference divider, programmable A and B counters, and a dual modulus prescaler (P/P + 1). The A (6-bit) and B (12-bit) counters, in conjunction with the dual modulus prescaler (P/P + 1), implement an N divider (N = BP + A). In addition, the 15-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with external loop filters and voltage controlled oscillators (VCOs).
Control of all the on-chip registers is via a simple 3-wire interface with 1.8 V compatibility. The devices operate with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.
Applications
- Wireless handsets (GSM, PCS, DCS, DSC1800, CDMA, WCDMA)
- Base stations for wireless Radio (GSM, PCS, DCS, CDMA, WCDMA)
- Wireless LANS
- Cable TV tuners (CATV)
- Communications test equipment
Product Categories
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.
Documentation & Resources
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FAQs7/26/2017
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Phase-Locked Loops for High-Frequency Receivers and Transmitters - Part 37/1/1999 Analog Dialogue
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Phase-Locked Loops for High-Frequency Receivers and Transmitters - Part 25/1/1999 Analog Dialogue
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Phase-Locked Loops for High-Frequency Receivers and Transmitters - Part 13/1/1999 Analog Dialogue
Tools & Simulations
Design Tools
ADIsimRF
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.
ADIsimPLL™
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.
Product Recommendations
ADF4212L Companion Parts
Recommended Linear Regulators
- For ultalow noise, 3V applications, 200 mA output: ADP151.
- For a step up, 3V to 5V regulator: ADP1613.
- For high accuracy, 5V applications: ADP3334.
- For ultralow noise, 3V applications,150 mA output: ADP150.
Recommended Divide-by-4 Prescaler
- For a low noise, low power, fixed RF block: ADF5001.
Recommended Modulators/Demodulators
Recommended PLL Active Filter
- For an ultralow noise, rail-to-rail amplifier: OP184.
