MAX2880 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Cycle Slip Reduction and Fast Lock

MAX2880
EVALUATION KIT AVAILABLE
250MHz to 12.4GHz, High-Performance,
Fractional/Integer-N PLL
General Description
The MAX2880 is a high-performance phase-locked
loop (PLL) capable of operating in both integer-N and
fractional-N modes. Combined with an external reference
oscillator, loop filter, and VCO, the device forms an ultra-
low noise and low-spur frequency synthesizer capable of
accepting RF input frequencies of up to 12.4GHz.
The MAX2880 consists of a high-frequency and low-
noise-phase frequency detector (PFD), precision charge
pump, 10-bit programmable reference counter, 16-bit
integer N counter, and 12-bit variable modulus fractional
modulator.
The MAX2880 is controlled by a 3-wire serial interface
and is compatible with 1.8V control logic. The device is
available in a lead-free, RoHS-compliant, 20-pin TQFN
and 16-pin TSSOP packages, and operates over an
extended -40°C to +85°C temperature range.
Applications
●● Microwave Point-to-Point Systems
●● Wireless Infrastructure
●● Satellite Communications
●● Test and Measurement
●● RF DAC and ADC Clocks
Functional Diagram
Benefits and Features
●● Integer and Fractional-N Modes
●● 250MHz to 12.4GHz Broadband RF Input
●● Normalized In-Band Noise Floor
• -229dBc/Hz in Integer Mode
• -227dBc/Hz in Fractional Mode
●● -10dBm to +5dBm Wide Input Sensitivity
●● Low-Noise Phase Frequency Detector
• 125MHz in Fractional Mode
• 140MHz in Integer Mode
●● Reference Frequency Up to 210MHz
●● Operates from +2.8V to +3.6V Supply
●● Cycle Slip Reduction and Fast Lock
●● Software and Hardware Shutdown
●● Software Lock Detect
●● On-Chip Temperature Sensor
●● Compatible with +1.8V Control Logic
●● Phase Adjustment
Ordering Information appears at end of data sheet.
VCP
REF
REF
DIV
x2
÷2
DAT
LE
SPI AND REGISTERS
CLK
12-BIT
FRAC
12-BIT
MOD
16-BIT
INT
PROGRAMMABLE MAIN
MODULATOR
MUX I/O
+
N
COUNTER
PFD
CP
CP
LD
RFINN
RFINP
÷2
CE
MUX
MAX2880
MUX
19-6871; Rev 1; 11/15