ADF4193 Low Phase Noise, Fast Settling PLL Frequency Synthesizer
The ADF4193 frequency synthesizer can be used to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. Its architecture is specifically designed to meet the GSM/EDGE lock time requirements for base stations. It consists of a low noise, digital phase frequency detector (PFD), and a precision differential charge pump. There is also a differential amplifier to convert the differential charge pump output to a single-ended voltage for the external voltage-controlled oscillator (VCO).
The Σ-Δ-based fractional interpolator, working with the N divider, allows programmable modulus fractional-N division. Additionally, the 4-bit reference (R) counter and on-chip frequency doubler allow selectable reference signal (REFIN) frequencies at the PFD input. A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and a VCO. The switching architecture ensures that the PLL settles inside the GSM time slot guard period, removing the need for a second PLL and associated isolation switches. This decreases cost, complexity, PCB area, shielding, and characterization on previous ping-pong GSM PLL architectures.
Applications
- GSM/EDGE base stations
- PHS base stations
- Instrumentation and test equipment
Features and BenefitsNew, fast settling, fractional-N PLL architectureSingle PLL replaces ping-pong synthesizersFrequency hop across GSM band in 5 µs with phase settled by 20 µs0.5° rms phase error at 2 GHz RF outputDigitally programmable output phaseRF input range up to 3.5 GHz3-wire serial interfaceOn-chip, low noise differential amplifierPhase noise figure of merit: –216 dBc/HzLoop filter design possible using ADIsimPLL™Qualified for automotive applications | |
Data Sheets
Application Notes
User Guides
Frequently Asked Questions
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADF4193BCPZ Production | 32 ld LFCSP (5x5mm) w/3.1mm exposed pad | OTH 490 | -40 to 85C | 5.51 | 4.88 | Y |
| ADF4193BCPZ-RL Production | 32 ld LFCSP (5x5mm) w/3.1mm exposed pad | REEL 5000 | -40 to 85C | 0 | 0 | Y |
| ADF4193BCPZ-RL7 Production | 32 ld LFCSP (5x5mm) w/3.1mm exposed pad | REEL 1500 | -40 to 85C | 0 | 4.88 | Y |
| ADF4193WCCPZ-RL7 Production | 32 ld LFCSP (5x5mm) w/3.1mm exposed pad | REEL 1500 | -40 to 105C | 0 | 7.5 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EV-ADF4193SD1Z | Evaluation board with 1.8 GHz VCO and loop filter components populated | 165 | Y |
| EV-ADF4193SD2Z | Evaluation board without VCO or loop filter components | 140 | Y |
| EVAL-SDP-CS1Z | SDP-S Controller Board - Interface to EV-ADF4193SD1Z and EV-ADF4193SD2Z (also required) | 49 | Y |
Reference Materials
