STF4169 is an 18GHz fractional N frequency synthesizer with modulation and fast waveform generation capabilities. The device uses a fixed modulus of 25 bits to provide sub hertz frequency resolution.
STF4169 can achieve programmable modular decimal N frequency division. The INT and FRAC registers can form a total N divider (N=INT+(FRAC/225)).
STF4169 can be used to achieve frequency shift keying (FSK) modulation. There are also some available frequency scanning modes that can generate various waveforms in the frequency domain, such as sawtooth and triangular waves, for automatic scanning. STF4169 has the function of inserting 8-bit FSK modulation signals between two adjacent slopes, which can improve anti-interference ability.
STF4169 can further shorten the locking time without modifying the loop filter. All on chip registers are controlled through a simple three wire interface. STF4169 uses a single power supply from 3.0 V to 3.45 V, which can be turned off when not in use.
Frequency modulated continuous wave (FMCW) radar
Communication testing equipment
Communication infrastructure
RF bandwidth up to 18 GHz
High speed and low speed frequency modulated continuous wave (FMCW) slope occurrence
25 bit fixed modulus provides sub hertz frequency resolution
Frequency and phase discriminator (PFD) with a maximum frequency of 50MHz
Normalized phase noise base (FOM): − 224 dBc/Hz
Frequency shift keying (FSK) function
Sawtooth and triangular wave shapes occur
Slope and Frequency Shift Keying (FSK) Overlay
Ramp delay, frequency read back, and interrupt functions
Power supply: 3.0 V to 3.45 V
Integrated Linear Voltage Stabilizer (LDO)
Programmable charge pump current
Integrated universal SPI three wire serial interface
Digital lock detection
ESD performance: 2000V HBM, 1500V CDM
Package size: QFN24 4mm x 4mm
Compatible with ADF4159/69 series and LMX2492 series
Consultation immediately
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