MAX2870_V1 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – 23.5MHz to 6000MHz Fractional Integer-N Synthesizer/VCO

19-6250; Rev 1; 7/12
EVALUATION KIT AVAILABLE
MAX2870
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer /VCO
General Description
The MAX2870 is an ultra-wideband phase-locked
loop (PLL) with integrated voltage control oscillators
(VCOs) capable of operating in both integer-N and
fractional-N modes. When combined with an external
reference oscillator and loop filter, the MAX2870 is
a high-performance frequency synthesizer capable
of synthesizing frequencies from 23.5MHz to 6.0GHz
while maintaining superior phase noise and spurious
performance.
The ultra-wide frequency range is achieved with the
help of multiple integrated VCOs covering 3000MHz to
6000MHz, and output dividers ranging from 1 to 128.
The device also provides dual differential output drivers,
which can be independently programmable to deliver
-4dBm to +5dBm output power. Both outputs can be
muted by either software or hardware control.
The MAX2870 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, 5mm x 5mm, 32-pin TQFN
package, and operates over an extended -40NC to +85NC
temperature range.
Applications
Wireless Infrastructure
Test and Measurement
Satellite Communications
Wireless LANs/CATV
Military and Aerospace
PMAR /LMAR/Public
Safety Radio
Clock Generation
Benefits and Features
S Integer and Fractional-N Modes
S Manual or Automatic VCO Selection
S 3000MHz to 6000MHz Fundamental VCO
S Output Binary Buffers/Dividers for Extended
Frequency Range
 1/2/4/8/16/32/64/128
 23.5MHz to 6000MHz
S High-Performance PFD
 105MHz in Integer-N Mode
 50MHz in Fractional-N Mode
S Reference Frequency Up to 200MHz
S Operates from +3.0V to +3.6V Supply
S Dual Programmable Outputs
 -4dBm to +5dBm
S Analog and Digital Lock Detect Indicators
S Hardware and Software Shutdown Control
S Compatible with 1.8V Control Logic
Ordering Information appears at end of data sheet.
Typical Application Circuit appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX2870.related.
Functional Diagram
MAX2870
REF_IN
CLK
DATA
LE
MUX
R COUNTER
X2
SPI AND
REGISTERS
INTEGER
FRAC
MODULUS
DIVIDE-BY-2
MUX
VCO
DIV-BY-
1 / 2 /4 / 8 / 16
MAIN
MODULATOR
N COUNTER
MUX
MUX
LOCK DETECT
CHARGE
PUMP
DIV-BY-
1 / 2 /4 / 8
MUX
MUX_OUT
LD
CP_OUT
CP_GND
TUNE
RFOUTA_P
RFOUTA_N
RFOUT_EN
RFOUTB_P
RFOUTB_N
For pricing, delivery, and ordering information, please contact Maxim Direct
  1
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.