Linear Technology offers frequency synthesiser for applications such as avionics
Linear Technology
LTC6946 frequency synthesiser
The LTC6946 frequency synthesiser from Linear Technology is suitable for improving the performance of multiband basestations that support LTE, W-CDMA, UMTS, CDMA, GSM and WiMAX standards — as well as point-to-point broadband wireless access, military, avionics, and high-performance test and measurement applications.
The device is part of the Interger-N series of high-performance frequency synthesisers that feature a phase-locked loop (PLL), which includes a reference divider, phase-frequency detector with phase-locked indicator, ultralow noise charge pump and integer feedback divider.
Additionally, the PLL circuit is coupled to a low noise VCO — which requires no additional components — and internal self-calibration that the company says ensures optimum VCO resonator tuning.
The PLLWizard PC-based design tool is offered to enable interactive control and interface with the synthesiser’s evaluation board. It also allows designers to perform simulations and optimisation, and interactively verify their designs using the actual demonstration circuit.
Click here to download the data sheet.
Key specifications
- 226dBc/Hz normalised closed-loop in-band phase noise
- -274dBc/Hz normalised in-band 1/f noise
- -157dBc/Hz wideband output phase noise floor
- -103dBc spurious output
- On-chip output divider can be programmed from 1–6 to extend frequency coverage down to 373MHz
- Integrates a low-noise 5.7GHz phase-locked loop
- Programmable charge pump offers up to 11.2mA output current
- LTC6946-1 operates within a frequency range of 2.240–3.740GHz
- LTC6946-2 from 3.080–4.910GHz
- LTC6946-3 has a range of 3.840–5.790GHz
- All versions function within a full case temperature range of -40°C to 105°C
- They are offered in a 4 x 5mm, 28-lead plastic QFN package
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