sp5730中文资料_数据手册_IC数据表

Description
The SP5730 is a single chip frequency synthesiser designed for tuning systems up to 1·3GHz and is optimised for digital terrestrial applications. The RF preamplifier interfaces direct with the RF programmable divider, which is of MN1A construction so giving a step size equal to the loop comparison frequency and no
Features
•Complete 1·3 GHz Single Chip System for Digital T errestrial Television Applications
•Selectable Reference Division Ratio, Compatible with DTT Requirements
•Optimised for Low Phase Noise, with Comparison Frequencies up to 4 MHz •No RF Prescaler
•Selectable Reference/Comparison Frequency Output •Four Selectable I 2C Addresses
•I 2C Fast Mode Compliant with 3·3V and 5V Logic Levels
•Four Switching Ports
•Functional Replacement for SP5659 (except ADC)•Pin Compatible with SP5655
•Power Consumption 120mW with V CC = 5·5V , all Ports off •ESD Protection 2kV min., MIL-STD-883B Method 3015Cat.1 (Normal ESD handling procedures should be observed)
Applications
•Digital Satellite, Cable and Terrestrial Tuning Systems •Communications Systems
prescaler phase noise degradation over the full RF operating range. The comparison frequency is obtained either from an on-chip crystal controlled oscillator, or from an external source. The oscillator frequency, f REF , or phase comparator frequency, f COMP , can be switched to the REF/COMP output providing a reference for a second frequency synthesiser. The synthesiser is controlled via an 12C bus and is fast mode compliant. It can be hard wired to respond to one of four addresses to enable two or more synthesisers to be used on a common bus. The device contains four switching ports P0 - P3.
SP5730
1.3 GHz Low Phase Noise Frequency Synthesiser
Data S heet
November 2004
Figure 1 - SP5730 block diagram
Absolute Maximum Ratings
All voltages are referred to V EE = 0V Supply voltage, V CC RF differential input voltage All I/O port DC offsets SDA and SCL DC offset Storage temperature Junction temperature QP16 thermal resistance Chip to ambient, θJA Chip to case, θJC -0·3V to +7V 2·5Vp-p -0·3 to V CC +0·3V -0·3 to 6V -55°C to +150°C +150°C 80°C/W 20°C/W
Ordering Information
SP5730A/KG/QP1T 16 Pin QSOP Tape & Reel SP5730A/KG/QP1S 16 Pin QSOP Tubes SP5730A/KG/MP1S 16 Pin SOIC Tubes SP5730A/KG/MP2S 16 Pin SOIC*Tubes
SP5730A/KG/QP2T 16 Pin QSOP*Tape & Reel SP5730A/KG/MP1T 16 Pin SOIC Tape & Reel SP5730A/KG/MP2T 16 Pin SOIC*Tape & Reel SP5730A/KG/QP2S 16 Pin QSOP*
Tubes
*Pb Free Matte Tin
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2001-2004, Zarlink Semiconductor Inc. All Rights Reserved.
https://
2
SP5730
Datasheet
100MHz to 1·3GHz, see Figure 350MHz to 100MHz, see Figure 3
See Figure 45V I 2C logic selected 3·3V I 2C logic selected 5V I 2C logic selected 3·3V I 2C logic selected Input voltage = V CC Input voltage = V EE V CC = V EE I SINK = 3mA I SINK = 6mA
See Table 7, V PIN1 = 2V
V PIN1 = 2V, V CC = 15·0V, T AMB = 25°C V PIN16 = 0·7V
See Figure 5 for application
Sinewave coupled via 10nF blocking capacitor Sinewave coupled via 10nF blocking capacitor AC coupled, see Note 20·5 to 20MHz
Enabled by bit RE = 1
f COMP = 2MHz, SSB, See Note 4f COMP = 125kHz, SSB, See Note 4
See Table 2
Supply current RF input
Input voltage Input impedance SDA, SCL
Input high voltage Input low voltage Input high current Input low current Leakage current Input hysteresis SDA output voltage SCL clock rate Charge pump Output current Output leakage Drive output current Crystal Frequency
External reference Input frequency Drive level
Buffered REF/COMP Output amplitude Output impedance Phase Detector
Comparison frequency Equivalent phase noise at phase detector RF division ratio
Reference division ratio
Table 1 - Electrical Characteristics
Test Conditions: T AMB = -40°C to +85°C, V CC = 4·5V to 5·5V. These characteristics are guaranteed by either
production test or design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated.
Figure 2 - Pin connections - top view
Characteristic Conditions
Max.Min.
Value
Typ.Units Pin 22300300
5·53·51·5110-1010
0·40·6400
±10
20
200·5327671213,14
4,5
4511162,33
11
12·54032·300
0·40·52
20·256
16
±30.352504mA
mVrms mVrms V V V V µA µA µA V V V kHz
nA mA MHz MHz Vp-p Vp-p Ω
MHz
dBc/Hz dBc/Hz cont…
-152-158https://
3
SP5730
Datasheet
Table 1 - Electrical Characteristics (continued)
2
30-10
Characteristic
V PORT = 0·7V
V PORT = V CC See Note 1See T able 5V IN = V CC V IN = V EE See Note 3
5V I 2C logic level selected 3·3V I 2C logic level selected V IN = V EE to V CC
Conditions
Max.
Min.
Value
Units
mA µA mA µA V V µA
Typ.
10
1-0·5
V CC 1·510
Output Ports P3 - P0Sink current Leakage current Address select Input high current Input low current Logic level select Input high level Input low level Input current
Pin 6-9
10
6
NOTES
1.Output ports high impedance on power-up, with SDA and SCL at logic ‘0’.
2.If the REF/COMP output is not used, the output should be left open circuit or connected to V CC and disabled by setting RE = ‘0’.
3.Bi-dectional port. When used as an output, the input logic state is ignored. When used as an input, the port should be switched into high impedance (off) state.
4.Figures measured at 2kHz deviation, SSB (within loop bandwidth).
Functional Description
The SP5730 contains all the elements necessary, with the exception of a frequency reference, loop filter and external high voltage transistor, to control a varactor tuned local oscillator, so forming a complete PLL frequency synthesised source. The device allows for operation with a high comparison frequency and is fabricated in high speed logic, which enables the generation of a loop with good phase noise performance. It can also be operated with comparison frequencies appropriate for frequency offsets as required in digital terrestrial television (DTT)receivers.
The RF input signal is fed to an internal preamplifier, which provides gain and reverse isolation from the divider signals. The output of the preamplifier interfaces with the 15-bit fully programmable divider which is of MN1A architecture, where the dual modulus prescaler is 48/9,the A counter is 3 bits, and the M counter is 12 bits.The output of the programmable divider is applied to the phase comparator where it is compared in both phase and frequency domains with the comparison frequency.This frequency is derived either from the on-chip crystal controlled oscillator or from an external reference source.In both cases the reference frequency is divided down to the comparison frequency by the reference divider which is programmable into 1 of 29 ratios as detailed inTable 2.The output of the phase detector feeds a charge pump and loop amplifier section, which when used with an external high voltage transistor and loop filter, integrates the current pulses into the varactor line voltage.
The programmable divider output f PD /2 can be switched to port P0 by programming the device into test mode.The test modes are described inT able 6.
Programming
The SP5730 is controlled by an I 2C data bus and is compatible with both standard and fast mode formats and with I 2C data generated from nominal 3·3V and 5V sources. The I 2C logic level is selected by the bi-directional port P3/ LOGLEV. 5V logic levels are selected by connecting P3/ LOGLEV to V CC or leaving it open circuit;3·3V logic levels are set by connecting P3/LOGLEV to ground. If this port is used as an input the P3 data should be programmed to high impedance. If used as an output only 5V logic levels can be used, in which case the logic state imposed by the port on the input is ignored.Data and clock are fed in on the SDA and SCL lines respectively as defined by I 2C bus format . The synthesiser can either accept data (write mode), or send data (read mode). The LSB of the address byte (R/W) sets the device into write mode if it is low, and read mode if it is high.Tables 3 and 4 illustrate the format of the data. The device can be programmed to respond to several addresses,which enables the use of more than one synthesiser in an I 2C bus system. Table 5 shows how the address is selected by applying a voltage to the address input.When the device receives a valid address byte, it pulls the SDA line low during the acknowledge period, and during following acknowledge periods after further data bytes are received.
When the device is programmed into read mode, the controller accepting the data must be pulled low during all status byte acknowledge periods to read another status byte. If the controller fails to pull the SDA line low during this period, the device generates an internal STOP condition, which inhibits further reading.
https://
4
SP5730
Datasheet
Write mode
With reference to T able 3, bytes 2 and 3 contain frequency information bits 214-20 inclusive. Bytes 4 and 5 control the reference divider ratio (see T able 2), charge pump setting (see Table 7), REF/COMP output (see T able 8),output ports and test modes (see Table 6).
After reception and acknowledgement of a correct address (byte 1), the first bit of the following byte determines whether the byte is interpreted as a byte 2 or
4, a logic ‘0’ indicating byte 2, and a logic ‘1’ indicating byte 4. Having interpreted this byte as either byte 2 or 4,the following data byte will be interpreted as byte 3 or 5respectively. Having received two complete data bytes,additional data bytes can be entered, where byte interpretation follows the same procedure, without re-addressing the device. This procedure continues until a STOP condition is received. The STOP condition can be generated after any data byte; if, however, it occurs during a byte transmission, the previous byte data is retained.T o facilitate smooth fine tuning, the frequency data bytes are only accepted by the device after all 15 bits of frequency data have been received, or after the generation of a STOP condition.
Read mode
When the device is in read mode, the status byte read from the device takes the form shown in Table 4.Bit 1 (POR) is the power-on reset indicator, and this is set to a logic ‘1’ if the V CC supply to the device has dropped below 3V (at 25°C ), e.g. when the device is initially turned on. The POR is reset to ‘0’ when the read sequence is terminated by a STOP command. When POR is set high this indicates the programmed information may be corrupted and the device reset to power up condition.Bit 2 (FL) indicates whether the device is phase locked, a logic’1’is present if the device is locked, and a logic ‘0’ if it is not.
Programable features
•RF programmable divider Function as described above.
•Reference programmable divider Function as described above.
•Charge pump current The charge pump current can be programmed by bits C1 and C0 within data byte 5,as defined in T able 7.
•Test mode The test modes are invoked by setting bits RE, RS, T1 and T0 as described in Table 6.
•Reference/Comparison frequency output The reference frequency f REF or comparison frequency f COMP can be switched to the REF/COMP output,function as defined in Table 8. RE and RS default to logic’1’during device power up, thus enabling the comparison frequency f COMP at the REF/COMP output.
Table 2 - Reference division ratios
00000000111111110000000011111111
R300001111000011110000111100001111
R200110011001100110011001100110011
R101010101010101010101010101010101
R0Division ratio 248163264128256Illegal state
510204080160320Illegal state
612244896192384Illegal state
7142856112224448
00000000000000001111111111111111
R4https://
5
SP5730
Datasheet
Address
Programmable divider Programmable divider Control data Control data
10271C1
Byte 1Byte 2Byte 3Byte 4Byte 5
121426T1C0
021325T0RE
021224R4RS
021123R3P3
MA121022R2P2
MA02921R1P1
02820R0P0
A A A A A Table 3 - Write data format (MS
B transmitted first)
MSB LSB Key to Table 3.A Acknowledge bit
MA1, MA0Variable address bits (see Table 5)214-20Programmable division ratio control bits R4-R0Reference division ratio select (see T able 2)C1, C0Charge pump current select (see Table 7)RE Reference oscillator output enable RS REF/COMP output select when RE=1 (see Table 8)T1-T0Test mode control bits (see Table 6)P3-P0P3, P2, P1 and P0 port output states
Address Status byte
1POR
Byte 1Byte 2
1FL
00
00
00
MA10
MA00
10
A A
MSB
LSB
Table 4 - Read data format (MSB transmitted first)
Key to table 4,A Acknowledge bit
MA1, MA0Variable address bits (see T able 5)POR Power On Reset indicator FL Phase lock flag
Table 5 - Address selection
* Programmed by connecting a 15k Ω resistor from pin 10 to V CC
011
MA10 to 0·1V CC Open circuit
0·4V CC to 0·6V CC *0·9V CC to V CC
Address input voltage level MA00101
Current (µA)
0011
0101
C1C0Min.Typ.Max.±116±247±517±1087
±155±330±690±1450
±194±412±862±1812
Table 7 - Charge pump current
* Clocks need to be present on crystal and RF inputs to enable
charge pump test modes and to toggle Status byte bit FL. X = don’t care
Table 6 - T est modes
RE•RS Test mode description 01X X X
T100011
T000101
Normal operation
Normal operation, P0 = f PD /2Charge pump sink*, FL = ‘0’Charge pump source*, FL = ‘0’Charge pump disabled*, FL = ‘1’
Table 8 - REF/COMP output
011
RE REF/COMP output
RS X 01
High impedance f REF selected f COMP selected
X = don’t care
https://
SP5730Datasheet
Figure 3 - Typical RF input sensitivity
Figure 4 - RF input impedance
Figure 5 - Crystal oscillator application 6
SP5730
Datasheet Array
Figure 6 - SP5730 evaluation board
7
8
SP5730
Datasheet
Table 9 - Component values for Figure 6
C22C23C24LED 1LED 2R1R4R5R6R7R8R9R10R11R12R13R14S1T1VCO X1
C1C2C3C4C5C6C7C8C9C10C11C12C13C14C15C16C17C18C19C20C21
Component
18pF 2·2nF 68pF 1nF 1nF 10nF 100nF 4·7µF 100nF 100pF 1nF 100pF 100pF 4·7nF 100pF 4·7µF 10nF 39pF 100pF 1nF 1nF
Value/type Component 100pF 4·7µF 1nF HLMPK-150HLMPK-1504·7k Ω4·7k Ω4·7k Ω4·7k Ω13·3k Ω22k Ω1k Ω0Ω16Ω16Ω16Ω68ΩSW DIP-2BCW31POS_9004MHz
Value/type https://
SP5730 Datasheet。