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ZL40815 10GHz Fixed Modulus / 4
Data Sheet Features
* * * * * * Very High Operating Speed Operation down to DC with Square Wave Input Low Phase Noise (Typically better than -146 dBc/Hz at 10 kHz) 5 V Single Supply Operation Low Power Dissipation: 510 mW (Typ) Surface Mount Plastic Package With Exposed Pad (See Application Notes)
Ordering Information ZL40815DCE ZL40815DCF ZL40815DCF1 ZL40815DCE1 Tubes, Bake & Drypack Tape & Reel, Bake & Drypack 8 Pin SOP/SOIC* Tape & Reel, Bake & Drypack 8 Pin SOP/SOIC* Tubes, Bake & Drypack *Pb Free Matte Tin -40C to +85C 8 Pin SOP/SOIC 8 Pin SOP/SOIC
March 2006
Applications
* * * * * * * DC to 10 GHz PLL applications HyperLan LMDS Instrumentation Satellite Communications Fibre Optic Communications; OC48, OC192 Ultra Low Jitter Clock Systems
Description
The ZL40815 is one of a range of 5 V supply, very high speed, low power prescalers for professional applications with a fixed modulus of divide by 4. The dividing elements are static D type flip flops, and therefore, allow operation down to DC if the drive signal is a pulse waveform with fast risetimes. The output stage has internal 50 ohm pull up giving a 1 V p-p output. See application notes for more details
VCC IN 1 50 Ohm
VCC OUT 8
OUTPUT 7 6 OUTPUT B Vref Div 4
400 Ohm INPUT 2 INPUT B 3 20mA
GND 4
GND 5
Figure 1 - 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.
ZL40815
Pin Connections - Top View
Data Sheet
Vcc INPUT INPUT INPUT B GND
1 2 3 4
8 7 6 5
Vcc OUTPUT OUTPUT OUTPUT B GND
SOIC (N) E-Pad
Applications Configuration
Figure 2 shows a recommended application configuration. This example shows the devices set up for single ended operation.
R3:100ohm C8:10nF C3:100pF 1 2 C4:100pf 3 R1:50ohm C5:100pf 4 5 6 8 7 C6:10nF C7:10nF C2:10nF C1:10uF
Vcc 5V
R2:50ohm
Example Configuration for Single ended operation
Figure 2 - Recommended circuit configuration The above circuit diagram shows some components in dotted lines. These are optional in many applications. 1. C1 (10 F) and C2 (10 nF) power supply decoupling capacitors may be available on the board already. 2. R3 (100 Ohm) and C8 (10 nF) can be included if further power supply decoupling is required for the first stage biasing circuit. This may optimize the noise and jitter performance. The values are suggestions and may have to be modified if the existing supplies are particularly noisy. 3. R1 (50 Ohm), in series with C5 (100 pF), may reduce feedthrough of the input signal to the output. 4. R2 (50 Ohm) and C7 (10 nF) will help to balance the current drawn from the power supply and may reduce voltage transients on the power supply line.
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Zarlink Semiconductor Inc.
ZL40815
Evaluation Boards From Zarlink Semiconductor
Data Sheet
Zarlink Semiconductor provides prescaler evaluation boards. These are primarily for those interested in performing their own assessment of the operation of the prescalers.The boards are supplied unpopulated and may be assembled for single ended or differential input and output operation, type No. ZLE40008. Fully populated evaluation boards are also available, type No. ZLE40810. Once assembled, all that is required is an RF source and a DC supply for operation. The inputs and outputs are connected via side launch SMA connectors. Absolute Maximum Ratings Parameter 1 2 3 4 5 6 Supply voltage Prescaler Input Voltage ESD protection (Static Discharge) Storage temperature Maximum Junction Temp Thermal characteristics TST TJmax THja 58.6 Symbol Vcc 2.5 2k -65 +150 +125 Min. Max. 6.5 (Vdd_IO+5%) Units V Vp-p V C C C/W multi-layer PCB
AC/DC Electrical Characteristics
Electrical Characteristics (Tamb = 25C, Vcc = 5V) Characteristic Supply current Supply current Input frequency Input sensitivity Input sensitivity Input sensitivity Input overload Input overload Input Edge Speed Output voltage Output power Phase Noise (10kHz offset) O/P Duty Cycle
Note 1:
Pin 1 8 2,3 2,3 2,3 2,3 2,3 2,3 2,3 6,7 6,7 6,7 6,7
Min.
Typ. 0.35 102
Max.
Units mA
Conditions Input stage bias current Divider and output stages RMS sinewave (see Note 1) fin = 1 GHz to 2 GHz fin = 2 GHz to 9.5 GHz fin = 11 GHz fin = 1 GHz to 4 GHz fin = 5 GHz to 11 GHz For <2 GHz operation. Differential Into 50 ohm pullup resistors Single-ended output, fin = 2 GHz to 10 GHz, pwr ip= -10 dBm Fin = 5 GHz, pwr ip = 0 dBm See Figure 7 and Figure 8.
130 11
mA GHz dBm
2 -8 -15 -10 8 11 900 1 -3 -1 -146 45 50
-10 0
dBm dBm dBm dBm V/is Vp-p
1.2
dBm dBc/Hz
55
%
Input sensitivity and output power values assume 50 Ohm source and load impedances.
The following characterization test method incremented the amplitude over the entire range of frequency and ensures that there are no "holes" in the characteristic. The following characteristics are guaranteed by either production test or design.
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Zarlink Semiconductor Inc.
ZL40815
Typical input sensitivity (sinewave drive) @ +25 Deg C
20.00
Data Sheet
10.00
Vin into 50 Ohm (dBm)
0.00
GUARANTEED OPERATING WINDOW
-10.00
25C MAX (Typ)
-20.00 Input frequency extends to DC if the or more source has an edge speed of 900 V/us or less -30.00
-40.00 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Input Frequency (GHz)
Figure 3 - Input Sensitivity @ +25C
Electrical Characteristics (Vcc = 5V 5%, Tamb = -40 to +85C)
Characteristic Supply current Supply current Supply current Supply current Supply current Supply current Supply current
Note 1:
Pin 1 8 8 8 8 8 8
Min.
Typ. 0.35
Max.
Units mA
Conditions Input stage bias current (see Note 1) -40C 5.25 V -40C 4.75 V +25C 5.25 V +25C 4.75 V +85C 5.25 V +85C 4.75 V
73 59 81 65 87 67
102 83 112 91 121 96
131 106 142 116 156 125
mA mA mA mA mA mA
Pin 1 is the Vcc pin for the 1 st stage bias current. In some applications e.g., if the power supply is noisy, it may be advantageous to add further supply decoupling to this pin (i.e., an additional R, C filter, see diagram of the recommended circuit configuration, figure 9).
The characteristics are guaranteed by design and characterisation over the range of operating conditions unless otherwise stated: (Input Frequency range 1 to 10 GHz rms Sinewave)
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ZL40815
Input and Output Characteristics Characteristic Input sensitivity Input overload Input overload Input overload Input overload Input Edge Speed Output voltage Output power O/P Duty Cycle Trise and Tfall Pin 2,3 2,3 2,3 2,3 2,3 2,3 6,7 6,7 6,7 6,7 -4 45 2 2 5 5 900 1 -1 50 110 2 55 Min. Typ. -15 5 8 13 11 Max. -10 Units dBm dBm dBm dBm dBm V/is Vp-p dBm % ps Conditions
Data Sheet
Tamb = 85C, Fin = 2 to 8 GHz fin = 2 GHz fin = 4 GHz fin = 9 GHz fin = 10 GHz For <2GHz Operation, see Note 1 Differential Into 50 ohm pullup resistors Single-ended output, fin = 2 GHz to 10GHz, pwr ip= -10dBm
Note 1: Input sensitivity and output power values assume 50 Ohm source and load impedances. Input sensitivity and output power values assume 50 Ohm source and load impedances.
For details of the test set-up, refer to the Application Note for RF Prescalers. The following graph summarizes the Input and Output Characteristics table.
Typical input sensitivity (sinewave drive) @ -40 to +85 Deg C
20.00 85 Deg C 70 Deg C 25 Deg C
10.00
Vin into 50 Ohm (dBm)
0.00 GUARANTEED OPERATING WINDOW -10.00 85C 70 25C -40C MAX (Typ)
-20.00 Input frequency extends to DC if the or less source has an edgespeed of 900 V/us or more -30.00
-40.00 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Input Frequency (GHz)
Figure 4 - Input Sensitivity @ -40, +25, +70 and +85C
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Zarlink Semiconductor Inc.
ZL40815
Phase Noise Measurement Graphs
Data Sheet
ZL40815 Phase Noise vs Offset Pin = 0dBm, Vcc = 5.25V, Temp = 25DegC
Phase Noise (dBc/Hz) -130 -135 -140 -145 -150 0.1 1 10 100 Offset Frequency (kHz) 5GHz 2GHz
Figure 5 - ZL40815 Phase Noise vs Offset Frequency
ZL40815 Phase Noise vs Input Frequency Pin = 0dBm, Vcc = 5.25V, Temp = 25 DegC
Phase Noise (dBc/Hz) -130 -135 -140 -145 -150 0 1 2 3 4 5 6 Input Frequency (GHz) 100Hz 1kHz 10kHz 100kHz
Figure 6 - ZL40815 Phase Noise vs Input Frequency
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Zarlink Semiconductor Inc.
ZL40815
Single Ended Output Power
The following graphs show how the output power varies with supply. Differential output power will be 3 dB.
Data Sheet
ZL8015_dev1_Pout_Frequency_sweep, Vcc = 4.75v Device 1,Temperature = -40C Device 1,Temperature = 85C 2 1 0 -1 -2 -3 -4 -5 -6 1000000000 i/p frequency (Hz)
Figure 7 - Pout, Freq, Temp @ Vcc = 4.75 V
Device 1,Temperature = 25C
o/p level (dBm)
10000000000
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
Frequency_sweep, Vcc = 5v Device 1,Temperature = -40C Device 1,Temperature = 85C
5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
Device 1,Temperature = 25C
o/p level (dBm)
1000000000 i/p frequency (MHz)
Figure 8 - Pout, Freq, Temp @ Vcc = 5 V
10000000000
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Zarlink Semiconductor Inc.
ZL40815
ZL40815_Pout_Frequency_sweep, Vcc = 5.25v Device 1,Temperature = -40C Device 1,Temperature = 85C 2 1 0 -1 -2 -3 -4 -5 -6 1000000000 i/p frequency (Hz)
Figure 9 - Pout, Freq, Temp @ Vcc = 5.25 V
Data Sheet
Device 1,Temperature = 25C
o/p level (dBm)
10000000000
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Zarlink Semiconductor Inc.
ZL40815
10GHz Prescaler Input Impedance, VCC=5V
50 40 REAL 30 20 10 Ohms 0 -10 IMAGE -20 -30 -40 -50 2 3 4 5 6 Frequency (GHz) 7 8 9
Data Sheet
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Figure 10 - Input Impedance of 10 GHz Prescalers
10GHz Prescaler Input Impedance, VCC=5V
50 40 REAL 30 20 10 Ohms 0 -10 IMAGE -20 -30 -40 -50 2 3 4 5 6 Frequency (GHz) 7 8 9 10
Figure 11 - Input Impedance of 10 GHz Prescalers (Typical)
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Zarlink Semiconductor Inc.
ZL40815
Oscillographs of the Divider Output Waveforms
Data Sheet
The following oscillographs show that the low-level feedthrough of the input waveform can be further reduced by summing the two output pins of the device differentially, refer to Figure 12 and Figure 13.
Figure 12 - Feedthrough of the input single-ended-output configuration VCC = 5 V, Vin = 2 dBm, Fin = 10 GHz
Figure 13 - Feedthrough of the input using differential output configuration VCC = 5 V, Vin = 2 dBm, Fin = 10 GHz
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Zarlink Semiconductor Inc.
ZL40815
Figure 14 and Figure 15 show the output waveforms with a lower input frequency.
Data Sheet
Figure 14 - Differential output with small input amplitude waveform VCC = 4.75 V, Vin = 10 dBm, Fin = 5 GHz
Figure 15 - Differential output with lower frequency input VCC = 4.75 V, Vin = 10 dBm, Fin = 2 GHz
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c Zarlink Semiconductor 2003 All rights reserved.
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