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부품번호 | MAX2871 기능 |
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기능 | 23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO | ||
제조업체 | Maxim Integrated | ||
로고 | |||
전체 28 페이지수
MAX2871
EVALUATION KIT AVAILABLE
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer/VCO
General Description
The MAX2871 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 MAX2871 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 programmed to deliver -1dBm to
+8dBm differential output power. Both outputs can be
muted by either software or hardware control.
The MAX2871 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 -40°C to +85°C
temperature range.
The MAX2871 has an improved feature set and better overall
phase noise and is fully pin- and software- compatible with
the MAX2870.
Applications
●● Wireless Infrastructure
●● Test and Measurement
●● Clock Generation
●● Microwave Radios
Functional Diagram
Benefits and Features
●● Output Binary Buffers/Dividers Enable Extended
Frequency Range
• Divider Ratios of 1/2/4/8/16/32/64/128
• 23.5MHz to 6000MHz
●● High-Performance Phase Frequency Detector (PFD)
and Reference Frequency Reduces Spectral Noise
• PFD Up to 140MHz
• Reference Frequency Up to 210MHz
●● Low Normalized Inband Phase Noise of -230dBc/Hz
Reduces System Noise Floor Contribution
●● Manual/Automatic VCO Selection Permits Fast
Switching
●● Output Phase Reset and Adjustment Allow
Synchronization of Multiple Synthesizers
●● On-Chip Temperature Sensor with 7-Bit ADC Ensures
Optimum VCO Selection
●● Cycle Slip Reduction and Fast Lock Features
Improve Accuracy and Acquisition Time
●● VCO Lock Maintained Over Entire Temperature
Range Provides Glitch-Free Operation
●● Dual Differential Programmable Outputs Maximize
Flexibility of Use
Ordering Information and Typical Application Circuit
appears at end of data sheet.
MAX2871
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
N COUNTER
MAIN
MODULATOR
MUX
MUX
LOCK DETECT
CHARGE
PUMP
DIV-BY-
1/ 2 /4 /8
MUX
MUX
LD
CP_OUT
GND_CP
TUNE
RFOUTA_P
RFOUTA_N
RFOUT_EN
RFOUTB_P
RFOUTB_N
19-7106; Rev 2; 5/16
MAX2871
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer /VCO
AC Electrical Characteristics (continued)
(Measured using MAX2871 EV Kit. VCC_ = 3V to 3.6V, VGND_ = 0V, fREF_IN = 50MHz, fPFD = 25MHz, fRFOUT_ = 6000MHz,
TA = -40°C to +85°C. Typical values measured at VCC_ = 3.3V, TA = +25°C, register settings 00780000, 20000141, 01005E42,
00000013, 610F423C, 01400005; unless otherwise noted.) (Note 2)
PARAMETER
Spurious Signals Due to PFD Frequency
VCO Tune Voltage
TEMPERATURE SENSOR AND ADC
ADC Resolution
Temperature Sensor Accuracy
CONDITIONS
50kHz loop bandwidth
MIN TYP MAX UNITS
-88 dBc
0.5
VCC_
- 0.5
V
7 Bits
3 °C
DIGITAL I/O CHARACTERISTICS
(VCC_ = +3V to +3.6V, VGND_ = 0V, TA = -40°C to +85°C. Typical values at VCC_ = 3.3V, TA = +25°C.) (Note 2)
PARAMETER
CONDITIONS
MIN TYP
SERIAL INTERFACE INPUTS (CLK, DATA, LE, CE, RFOUT_EN)
Input Logic-Level Low
Input Logic-Level High
Input Current
Input Capacitance
VIL
VIH
IIH/IIL
0.4
1.5
-1
1
SERIAL INTERFACE OUTPUTS (MUX, LD)
Output Logic-Level Low
Output Logic-Level High
Output Current Level High
0.3mA sink current
0.3mA source current
VCC -
0.4
0.5
MAX
+1
0.4
UNITS
V
V
µA
pF
V
V
mA
www.maximintegrated.com
Maxim Integrated │ 4
4페이지 MAX2871
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer /VCO
Typical Operating Characteristics (continued)
(Measured with MAX2871 EV Kit. VCC_ = 3.3V, VGND_ = 0V, fREF_IN = 50MHz, TA = +25°C, see the Testing Conditions Table.)
2113.5MHz FRACTIONAL-N PHASE NOISE
vs. FREQUENCY (LOW-SPUR MODE)
-70 toc10
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
1k
10k 100k 1M
FREQUENCY (Hz)
10M 100M
SUPPLY CURRENT vs. OUTPUT POWER
SETTING (ONE CHANNEL ACTIVE, 3GHz)
160 toc13
150
140
130
120
110
100
90
80 TA = +25˚C
TA = +85˚C
70 TA = -40˚C
60
00 01 10 11
PWR SETTING
2679.4MHz FRACTIONAL-N PHASE NOISE
vs. FREQUENCY (LOW-NOISE MODE)
-70 toc11
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
1k
10k 100k 1M 10M 100M
FREQUENCY (Hz)
250
230
210
190
170
150
130
110
90
70
50
10
SUPPLY CURRENT vs. FREQUENCY
(ONE CHANNEL ACTIVE,
MAXIMUM OUTPUT POWER)
toc14
TA = +25˚C
TA = +85˚C
TA = -40˚C
100 1k
FREQUENCY (MHz)
10k
SUPPLY CURRENT vs. FREQUENCY
(TWO CHANNELS ACTIVE,
MAXIMUM OUTPUT POWER)
300 toc16
280 TA = +25˚C
TA = +85˚C
260 TA = -40˚C
240
220
200
180
160
140
120
100
10
100 1K
FREQUENCY (MHz)
10K
3.85
3.84
3.83
3.82
3.81
3.8
3.79
3.78
3.77
3.76
3.75
0
2679.4MHz FRACTIONAL-N PHASE NOISE
vs. FREQUENCY (LOW-SPUR MODE)
-70 toc12
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
1k
10k 100k 1M
FREQUENCY (Hz)
10M 100M
SUPPLY CURRENT vs. OUTPUT POWER
SETTING (TWO CHANNELS ACTIVE, 3GHz)
toc15
200
180
160
140
120
TA = +25˚C
100 TA = +85˚C
TA = -40˚C
80
00 01 10
PWR SETTING
11
PLL LOCK vs. TIME
toc17
FASTLOCK OFF
FASTLOCK ON
50 100
TIME (µs)
150
200
www.maximintegrated.com
Maxim Integrated │ 7
7페이지 | |||
구 성 | 총 28 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
MAX2870 | 23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO | Maxim Integrated |
MAX2871 | 23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO | Maxim Integrated |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |