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The MAX2871ETJ device is a 23.5MHz to 6000MHz fractional N division frequency synthesizer /VCO.

Product Introduction:

The MAX2871 is an ultra-wideband phase-locked loop (PLL) with an integrated voltage controlled oscillator (VCO) that operates in both integer and fractional N division modes. When used in combination with external reference oscillators and loop filters, the MAX2871 is a high-performance frequency synthesizer capable of synthesizing frequencies from 23.5MHz to 6.0GHz while maintaining excellent phase noise and spurious performance.

With multiple integrated Vcos covering the 3000MHz to 6000MHz range, and with output dividers from 1 to 128, the ultra-wide frequency range is possible. The device also offers dual differential output drivers that can be programmed independently to provide output power from -1dBm to +8dBm. Both outputs can be silenced by software or hardware control.

The MAX2871 is controlled by a four-wire serial interface and is compatible with 1.8V control logic. The device also has an improved feature mix and better overall phase noise performance, and is fully pin and software compatible with the MAX2870.

Function diagram of MAX2871ETJ:

Product features:

The output binary buffer/divider supports extended frequency range

The frequency division ratio is 1/2/4/8/16/32/64/128

23.5MHz to 6000MHz

High performance frequency phase discriminator (PFD) and reference frequency reduce spectrum noise

PFD up to 140MHz

Reference frequency up to 210MHz

Normalized in-band phase noise as low as -230 DBC /Hz reduces the system's background noise contribution

Manual or automatic VCO selection allows for fast switching

Output phase reset and adjustment allows multiple frequency synthesizers to synchronize

An on-chip temperature sensor with a 7-bit ADC ensures a reasonable choice of VCO

Cycle reduction and quick lock feature increase accuracy and speed up sampling

Maintaining a VCO lock over the entire temperature range enables burr free operation

The dual differential programmable output fully improves the flexibility of use

Product Application:

Clock generation

Microwave radio

Test and measurement

Wireless infrastructure