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
The ADF4157 is a 6 GHz fractional-N frequency synthesizer designed for applications such as satellite communications terminals, radar equipment, and wireless handsets. It features a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider to allow subhertz frequency resolution at 6 GHz.
The device operates with a power supply ranging from 2.7 V to 3.3 V and includes cycle slip reduction circuitry for faster lock times without requiring modifications to the loop filter. Control of all on-chip registers is achieved via a simple 3-wire serial interface.
| RF Input Frequency | 0.5/6.0 GHz min/max |
|---|---|
| Power Supply Voltage | 2.7 V to 3.3 V |
| Phase Noise Floor | -137 dBc/Hz typ @ 10 MHz PFD frequency |
| Operating Temperature Range (Industrial) | -40°C to +85°C |
The maximum RF input frequency is 6.0 GHz.
The device operates between -40°C and +85°C.
The RF input frequency can reach a maximum of 6.0 GHz.
The high value is typically 5 mA when using a 5.1 kΩ resistor.