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PDF 8V97051 Data sheet ( Hoja de datos )
| Número de pieza | 8V97051 | |
| Descripción | Low Power Wideband Fractional RF Synthesizer / PLL | |
| Fabricantes | IDT | |
| Logotipo |  |
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Low Power Wideband Fractional
RF Synthesizer / PLL
8V97051
Datasheet
General Description
The 8V97051 is a high performance Wideband RF Synthesizer / PLL
optimized for use as the local oscillator (LO) in Multi-Carrier,
Multi-mode FDD & TDD Base Station radio card. It is offered in a
compact 5x5, 32-VFQFN package.
The 8V97051 Wideband RF Synthesizer / PLL offers a default
Fractional Mode with the option to use it with an Integer mode. It
requires an external loop filter.
The 8V97051 with integrated Voltage Controlled Oscillator (VCO)
supports output frequencies from 34.375MHz to 4400MHz and
maintains superior phase noise and spurious performance.
RF_OUT[A:B] output drivers have independently programmable
output power ranging from –4dBm to +7dBm. The RF_OUT outputs
can be muted. The mute function is accessible via a SPI command
or mute pin.
The operation of the 8V97051 is controlled by writing to registers
through a 3-wire SPI interface. The 8V97051 also has an additional
option that allows users to read back values from registers by
configuring the MUX_OUT pin as a SDO for the SPI interface. The
SPI interface is compatible with 1.8V logic and tolerant to 3.3V.
In multi-service base stations, very low noise oscillators are required
to generate a large variety of frequencies to the mixers while
maintaining excellent phase noise performance and low power. The
8V97051 offers a large tuning range capable of providing multi-band
local oscillator (LO) frequency synthesis in multi-mode base stations,
thus limiting the use of multiple narrow band RF Synthesizers and
reducing the BOM complexity and cost. The device can operate over
-40°C to +85°C industrial temperature range.
Features
• Dual Differential Outputs
• Output frequency range: 34.375MHz to 4400MHz (continuous
range)
• RF Output Divide by 1, 2, 4, 8, 16, 32, 64
• Open Drain Outputs (see Output Distribution Section)
• Fractional-N synthesizer (also supports Integer-N mode)
• 16-bit integer and 12-bit fractional
(16-bit fractional when using the extended registers)
• 3- or 4-wire SPI interface (compatible with 3.3V and 1.8V)
• Single 3.3V supply
• Logic compatibility: 1.8V
• Programmable output power level: -4dBm to +5dBm
(up to +7 when using the extended registers)
• Mute Function
• Ultra low PN for 1.1GHz LO: -143dBc/Hz @ 1MHz Offset, (typical)
• Lock Detect Indicators
• Input Reference frequency: 5MHz to 310MHz
• Power Consumption: 380mW (typical) (RF_OUTB disabled)
• 32-Lead, 5x5 VFQFN package
• Automatic VCO band selection (Autocal feature)
• -40°C to +85°C ambient operating temperature
• Supports case temperature 105°C operations
• Lead-free (RoHS 6) packaging
Applications
• Wireless Infrastructure
• Test Equipment
• CATV Equipment
• Military and Aerospace
• Wireless LAN
• Clock Generation
©2016 Integrated Device Technology, Inc.
1
Revision 4, September 22, 2016
1 page  
8V97051 Datasheet
AC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Table 15A. AC Characteristics, VDDX = VDDA = 3.3V ± 5%, TA = -40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Table 15B. RF_OUT[A:B] Phase Noise and Jitter Characteristics, VDDX = VDDA = 3.3V ± 5%, TA = -40°C to 85°C . . . . . . . . . . . . . . . . .39
Phase Noise at 156.25MHz (3.3V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Phase Noise at 1.76GHz (3.3V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Phase Noise Performance (Open Loop) at 1.1GHz (3.3V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Phase Noise Performance (Open Loop) at 1.65GHz (3.3V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Phase Noise Performance (Open Loop) at 2.3GHz (3.3V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Phase Noise Performance (Open Loop) at 3.8GHz (3.3V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Loop Filter Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
2nd Order Loop Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 11. Typical 2nd Order Loop Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
3rd Order Loop Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 12. Typical 3rd Order Loop Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Recommendations for Unused Input and Output Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Schematic Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Figure 13A. An 8V97051 General Application Schematic Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Figure 13B. Schematic Example for Driving Single Ended Mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Table 16. Thermal Resistance JA for 32 Lead VFQFN, Forced Convection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Case Temperature Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Reliability Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Table 17A. JA vs. Air Flow Table for a 32 lead VFQFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Table 17B. JB vs. Air Flow Table for a 32 lead VFQFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Transistor Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
32-Lead VFQFN Package Outline and Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
32-Lead VFQFN Package Outline and Package Dimensions (Continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Table 18. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Table 19. Pin 1 Orientation in Tape and Reel Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Revision History Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
©2016 Integrated Device Technology, Inc.
5
September 22, 2016
5 Page 
8V97051 Datasheet
Phase and Frequency Detector (PFD) and Charge
Pump
The phase detector compares the outputs from the R counter and
from the N counter and generates an output corresponding to the
phase and frequency difference between the two inputs the PFD. The
charge pump current is programmable through the serial port (SPI)
to several different levels.
The PFD offers an anti-backlash function that helps to avoid any
dead zone in the PFD transfer function.
VDD
D1
Q1
REF_IN x (1+D)/R
ICP
DELAY
CP_OUT
VDD
D1
Q1
FB
ICP
Figure 2. Simplified PFD Circuit using D-type Flip-flop
The Band Select logic operates between 125kHz and 500kHz. The
Band Select clock divider needs to be set to divide down the PFD
frequency to between 125kHz to 500kHz (logic maximum frequency).
PFD Frequency
The VCO Band Selection can be used while operating at PFD
frequencies up to 310MHz.
If the application requires the PFD frequency to be higher than
125MHz, the user can use one of the following two techniques
(Technique A is the recommended procedure):
A.The user can use the extended register ExtBndSelDiv[4:1] bits
(Bits[D6:D3]) in Register 6. These additional band select divider
bits extend the band select divider from 8-bits (available in
Register 4) to 12-bits. The four additional band select divider bits
in Register 4 are the most significant bits of the divide value. For
proper VCO band selection, the PFD frequency divided by the
band select divide value must be 500kHz and 125kHz.
B.If choosing this second technique, the user must follow the
three following steps:
1. Disable the Phase Adjust function by setting the bit D28 In
Register 1 to 0, keep the PFD frequency lower than 125MHz,
and program the desired VCO frequency.
2. Enable the phase adjust function by setting
BAND_SEL_DISABLE (Bit D28 in Register 1) to 1.
3. Set the desired PFD frequency and program the relevant
R divider and N counter values.
In either technique, the Lock Detect Precision should be
programmed to be lower than the PFD period using the bit [D7] in
Register 2 and the bits [D27:D26] in Register 6 (Refer to Table 4A,
Page 9).
External Loop Filter
The 8V97051 requires an external loop filter. The design of that filter
is application specific. For additional information, refer to the
Applications Information section.
Phase Detector Polarity
The phase detector polarity is set by bit D6 in Register 2. This bit
should be set to 1 when using a passive loop filter or a non-inverting
active loop filter. If an inverting active filter is used, this bit should be
set to 0.
Charge Pump High-Impedance
In order to put the charge pump into three-state mode, the user must
set the bit D4 [CP HIGHZ] in Register 2 to 1. This bit should be set to
0 for normal operation.
Integrated Low Noise VCO
The VCO function of the 8V97051 consists in three separate VCOs.
This allows keeping narrow tuning ranges for the VCOs while offering
a large frequency tuning range for VCO core. Keeping narrow VCO
tuning ranges allows for lower VCO sensitivity (KVCO), which results
in the best possible VCO phase noise and spurious performance.
The user does not have to select the different VCO bands. The VCO
band select logic of the 8V97051 will automatically select the most
suitable band of operation at power up or when Register 0 is written.
Output Distribution Section
The 8V97051 device provides two outputs. These two outputs can
generate the same frequency (fVCO / M0) or two integer related
different frequencies (in this case, RF_OUTB would generate a
frequency equal to the VCO frequency and RF_OUTA would
generate fVCO / M0).
©2016 Integrated Device Technology, Inc.
11
September 22, 2016
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet 8V97051.PDF ] | |
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