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ZL40804 6 GHz Fixed Modulus / 4
Data Sheet Features
* * * * * 3.45 V Single Supply Operation Low Power Dissipation: 210 mW typ Broadband: DC to 6 GHz SSB Phase Noise: -148 dBc/Hz @ 10 KHz Pout 3 dBm
ZL40804/DCA ZL40804/DCB ZL40804DCE1 ZL40804DCF1
March 2006
Ordering Information 8 pin SOIC Tubes 8 pin SOIC Tape and Reel 8 Pin SOIC* Trays, Bake & Drypack 8 Pin SOIC* Trays, Bake & Drypack *Pb Free Matte Tin -40C to +85C
Prescaler Modulus
* ZL40804 - Divide by 4
Description
The ZL40804 are Bipolar 3.45 V supply, very low power prescalers for professional applications with a fixed modulus of 4. The ultra low close in (10 KHz offset) SSB phase noise performance is ideal for narrow band communications systems or systems with ultra low jitter budgets such as next generation fibre optic communications. The devices are broadband from DC to 6 GHz. See Figure 1 and Application Note for RF Prescalers for more details.
Applications
* * * * * * * DC to 6 GHz PLL applications HyperLan LMDS Instrumentation Satellite Communications Fibre Optic Communications; OC48, OC192 Ultra Low Jitter Clock Systems
VCC IN 1 50 Ohm
VCC OUT 8
OUTPUT 7 6 OUTPUT B Vref Div N
400 Ohm INPUT 2 INPUT B 3
*
20mA
GND 4
GND 5
Figure 1 - Functional Block Diagram 1
Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2003-2006, Zarlink Semiconductor Inc. All Rights Reserved.
ZL40804
Data Sheet
V cc IN IN P U T IN P U T B a r GND
1 2 3 4
8 7 6 5
V cc O U T OU TPU T O U T PU T B ar GND
S O IC (N )
Figure 2 - Pin Connections - Top View
Application Configuration
Figure 3 shows a recommended application configuration. This example shows the device set up for single ended operation.
A pplication D iagram
C 1: 1nF R filter C 2: 10nF
V cc
8 7 6 5 C 6: 10nF R load C 5: 10nF
C 3: 100pF
1 2 3
R source:
C 4: 100pF
4
N ote: D otted C om ponents O ptional
Figure 3 - Recommended Circuit Configuration This represents the circuit used to complete characterization. The tabulated Electrical performance is guaranteed using this application circuit. Unpopulated evaluation boards are available, type No. ZLE40008. A fully populated evaluation board is also available, type No. ZLE40804.
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ZL40804
Circuit Options
Data Sheet
The application circuit includes some optional components that may be required to improve tolerance of system noise present in the application. Dummy R source may be added to the inverting input to provide a better matched source impedance at the input. This will improve the rejection of common mode noise present within the system. Dummy R load may be added to the inverting output to provide better matched load at the output. This will reduce the radiated EMI at the output and reduce the Output Noise present on the supply rail. Rfilter can be inserted between the Vcc_In and the Vcc_out to provide additional filtering to the input Vcc. The input Vcc powers the input bias reference only and can be a sensitive point to system noise. The nominal input current at Vcc_In is 0.35 mA. An alternative would be to use an inductive choke. C1 is additional Supply Filtering and should be added with Rfilter. The IC includes 10pF of on Chip Supply Filtering.
Input & Output Circuit
Figure 4 shows the equivalent input and output circuit.
*
Vcc_Out
Vcc_In Vref
I/O Circuits
400 Ohm 400 Ohm
*
*
50 Ohm
*
50 Ohm
*
0.5pF
0.5pF
* *
*
*
1.0nH 1.0nH
Output
Input
* *
1.0nH 0.2pF
* * *
0.8pF
* *
20mA 10mA
Output Bar
Input bar
1.0nH
Gnd
*
*
Gnd
Figure 4 - Input and Output Equivalent Circuit
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ZL40804
Data Sheet
ZL40804 Phase Noise / Offset Frequency
T =25C, Vcc =3.6V, Pin=-6dBm
-125 Phase Noise dBC/Hz -130 -135 -140 -145 -150 -155 100 1000 10000 100000 Offset Frequency
Figure 5 - ZL40804 Typical Phase Noise
5GHz 3GHz 1GHz
Absolute Maximum Ratings Parameter 1 2 3 4 5 Supply voltage RFin All I/O ports Storage temperature ESD protection TST -0.5 -55 Symbol Vcc Min.
- 0.5
Max. 6 12 Vcc+0.5 150 2
Units V dBm V C kV
Comments
Mil-std 883B / 3015 cat1
Operating Range Characteristic Supply Voltage (Vcc) RFin Frequency Range Operating Junction Temperature Junc'n to Amb't resistance Theta Ja Junc'n to Case resistance Theta Jc Min. 3.3 0.1 -40 150 60 Typ. Max. 3.6 6 +125 Units V GHz C C/W C/W
4 layer FR4 Board 4 layer FR4 Board
Comments
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ZL40804
AC/DC Characteristics
Electrical Characteristics Characteristic Icc_in (Supply current) Icc_out (Supply current) Input frequency Input sensitivity Input overload Phase Noise Output voltage Output power Output t-rise Output t-fall T - prop delay Jitter Output Duty Cycle Input. Edge Speed 6,7 45 500 Pin 1 8 2,3 2,3 2,3 6,7 6,7 6,7 6,7 6,7 2,6 -7 4 36 1 -20 10 -150 1 -2 110 110 250 0.1 50 55 2 Min. Typ. 0.35 61 96 6 -10 Max. Units mA mA GHz dBm dBm dBC/Hz Vp-p dBm ps ps ps ps % V/us RMS sinewave, Conditions
Data Sheet
fin = 1 GHz to 6 GHz, Note 1 fin = 1 GHz to 6 GHz, Note 1 @ 10 KHz Offset Fin = 3 GHz Differential Into 50 ohm pull up resistors fin = 1 GHz to 6 GHz, Pin = -10 dBm, Note 2 fin = 1 GHz to 6 GHz, Pin = -10 dBm fin = 1 GHz to 6 GHz, Pin = -10 dBm 50% IN to 50% OUT
fin = 1 GHz to 6 GHz, In = -10 dBm For < 1 GHz input operation
These characteristics are guaranteed by design and characterization over the following range of operating conditions unless otherwise stated: Tamb = -40C to +85C, Vcc = 3.3 V to 3.6 V Note 1: Pin = power measured into 50 ohm Load from 50 ohm Source. Note 2: Pout Single Ended AC coupled Single 50 ohm Termination. For details of the test set-up, refer to the Application Note for RF Prescalers.
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ZL40804
Data Sheet
Typical Input Sensitivity (Sinewave Drive) 15 10 Vin into 50 Ohm (dBm) 5 0 -5 -10 -15 -20 -25 -30 -35 0 1 2 3 4 5 6 7 8 9
Edge Speed >500V/us
Guaranteed Operating Range -40C to 85C
Input Frequency (GHz)
Figure 6 - Typical Input Sensitivity (sine wave drive)
Vcc out
50 Ohm
50 Ohm
Transmission Line 50 Ohm 50 Ohm Optional Balance
Gnd Pre-scaler Output
Figure 7 - Single Ended AC Coupled Single Termination
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ZL40804
Data Sheet
ZL40804 Phase Noise / Fin -125 Phase Noise in dBC/Hz -130 -135 -140 -145 -150 -155 0 2 Fin in GHz
Figure 8 - ZL40804 Phase Noise vs Input Frequency
100 1000 10000 100000
4
6
ZL40804_Dev1 Frequency_sweep, Vcc = 3.3v Device 1,Temperature = -40C 2 1 0 o/p level (dBm) -1 -2 -3 -4 -5 -6 0.E+00 Device 1,Temperature = 25C Device 1,Temperature = 85C
1.E+09
2.E+09
3.E+09
4.E+09
5.E+09
6.E+09
7.E+09
8.E+09
i/p frequency (MHz)
Figure 9 - ZL40804 Pout vs Input Frequency (Vcc = 3.3 V, T=25C, T=85C)
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Zarlink Semiconductor Inc.
ZL40804
Data Sheet
ZL40804_Dev1 Frequency_sweep, Vcc = 3.3v Device 1,Temperature = -40C 2 1 0 o/p level (dBm) -1 -2 -3 -4 -5 -6 0.E+00 1.E+09 2.E+09 3.E+09 4.E+09 5.E+09 6.E+09 7.E+09 8.E+09 i/p frequency (MHz)
Figure 10 - ZL40804 Pout / Input Frequency (Vcc = 3.6 V, T=25C, T=85C)
Device 1,Temperature = 25C
Device 1,Temperature = 85C
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6GHz Prescaler Input Impedance, VCC=3.3V
50 40 30 REAL 20 10 Ohms 0 -10 -20 IMAGE -30 -40 -50 1 2 3 4 Frequency (GHz) 5 6
Data Sheet
7
Figure 11 - Input Impedance of 6 GHz Prescalers
6GHz Prescaler Input Impedance, VCC=3.3V
50 40 30 REAL 20 10 Ohms 0 -10 -20 IMAGE -30 -40 -50 1 2 3 4 Frequency (GHz) 5 6 7
Figure 12 - Input Impedance of 6 GHz Prescalers (Typical)
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ZL40804
Single Ended or Differential Load
Data Sheet
Figures 11 and 12 illustrate the output waveform when measured differential and single ended with a 5 GHz waveform at the input at a level of +2 dBm. The single ended output contains some input frequency break through which contributes to the distortion present. This is a common mode signal which is rejected if the output is taken differentially. Differential operation also provides an additional 6 dB output power. Differential Operation reduces the radiated EMI in the system and reduces the susceptibility to common mode system noise.
Figure 13 - ZL40804 Single Ended Out @ 3 GHz +2 dBm
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ZL40804
Data Sheet
Figure 14 - ZL40804 Differential Out @ 5 GHz +2 dBm
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