ZARLINK ZL40815DCF

ZL40815
10GHz Fixed Modulus ÷ 4
Data Sheet
Features
•
•
•
•
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•
March 2006
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
-40°C to +85°C
Description
Applications
•
•
•
•
•
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8 Pin SOP/SOIC
8 Pin SOP/SOIC
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
DC to 10 GHz PLL applications
HyperLan
LMDS
Instrumentation
Satellite Communications
Fibre Optic Communications; OC48, OC192
Ultra Low Jitter Clock Systems
VCC IN
VCC OUT
8
1
50 Ohm
OUTPUT
7
6
OUTPUT B
Vref
Div 4
400 Ohm
INPUT
2
INPUT B
3
20mA
GND
GND
4
5
Figure 1 - Block Diagram
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Copyright 2003-2006, Zarlink Semiconductor Inc. All Rights Reserved.
ZL40815
Data Sheet
Pin Connections - Top View
Vcc INPUT
1
8
Vcc OUTPUT
INPUT
2
7
OUTPUT
INPUT B
3
6
OUTPUT B
4
5
GND
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.
Vcc 5V
R3:100ohm
C8:10nF
C3:100pF
1
8
2
7
C1:10uF
C6:10nF
C4:100pf
R1:50ohm
C2:10nF
3
6
4
5
C7:10nF
C5:100pf
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 µF) 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
Data Sheet
Evaluation Boards From Zarlink Semiconductor
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
Symbol
Min.
1
Supply voltage
2
Prescaler Input Voltage
2.5
3
ESD protection (Static Discharge)
2k
4
Storage temperature
5
Maximum Junction Temp
6
Thermal characteristics
Max.
Units
6.5
V
(Vdd_IO+5%)
Vp-p
Vcc
-65
TST
TJmax
V
+150
°C
+125
°C
58.6
THja
°C/W
multi-layer PCB
AC/DC Electrical Characteristics
Electrical Characteristics (Tamb = 25C, Vcc = 5V)†
Characteristic
Pin
Min.
Typ.
Supply current
1
0.35
Supply current
8
102
Input frequency
2,3
Input sensitivity
2,3
-8
Input sensitivity
2,3
-15
Input sensitivity
2,3
-10
Input overload
2,3
Input overload
2,3
Input Edge Speed
2,3
Output voltage
6,7
Output power
6,7
Phase Noise (10kHz
offset)
6,7
O/P Duty Cycle
6,7
Note 1:
Max.
Units
mA
Input stage bias current
130
mA
Divider and output stages
11
GHz
RMS sinewave (see Note 1)
dBm
fin = 1 GHz to 2 GHz
-10
dBm
fin = 2 GHz to 9.5 GHz
0
dBm
fin = 11 GHz
8
dBm
fin = 1 GHz to 4 GHz
11
dBm
fin = 5 GHz to 11 GHz
V/ìs
For <2 GHz operation.
Vp-p
Differential Into 50 ohm pullup resistors
dBm
Single-ended output, fin = 2 GHz to 10 GHz,
pwr ip= -10 dBm
2
900
1
-3
-1
1.2
-146
45
Conditions
50
dBc/Hz
55
Fin = 5 GHz, pwr ip = 0 dBm
See Figure 7 and Figure 8.
%
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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ZL40815
Data Sheet
Typical input sensitivity (sinewave drive) @ +25 Deg C
20.00
Vin into 50 Ohm (dBm)
10.00
0.00
GUARANTEED
OPERATING WINDOW
25C
MAX (Typ)
-10.00
-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 @ +25°C
Electrical Characteristics (Vcc = 5V ±5%, Tamb = -40 to +85C)†
Characteristic
Pin
Min.
Typ.
Supply current
1
Supply current
8
73
102
Supply current
8
59
Supply current
8
Supply current
Max.
Units
mA
Input stage bias current (see Note 1)
131
mA
-40°C 5.25 V
83
106
mA
-40°C 4.75 V
81
112
142
mA
+25°C 5.25 V
8
65
91
116
mA
+25°C 4.75 V
Supply current
8
87
121
156
mA
+85°C 5.25 V
Supply current
8
67
96
125
mA
+85°C 4.75 V
Note 1:
0.35
Conditions
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
Data Sheet
Input and Output Characteristics†
Characteristic
Pin
Min.
Typ.
Max.
Units
Conditions
-15
-10
dBm
Tamb = 85C, Fin = 2 to 8 GHz
Input sensitivity
2,3
Input overload
2,3
2
5
dBm
fin = 2 GHz
Input overload
2,3
2
8
dBm
fin = 4 GHz
Input overload
2,3
5
13
dBm
fin = 9 GHz
Input overload
2,3
5
11
dBm
fin = 10 GHz
Input Edge Speed
2,3
900
V/ìs
For <2GHz Operation, see Note 1
Output voltage
6,7
Vp-p
Differential Into 50 ohm pullup resistors
Output power
6,7
-4
-1
2
dBm
Single-ended output, fin = 2 GHz to
10GHz, pwr ip= -10dBm
O/P Duty Cycle
6,7
45
50
55
%
Trise and Tfall
6,7
1
110
ps
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
Vin into 50 Ohm (dBm)
10.00
0.00
GUARANTEED
OPERATING WINDOW
85C
70
25C
-40C
MAX (Typ)
-10.00
-20.00
Input frequency extends to DC if the
or more
source has an edgespeed of 900 V/us or
less
-30.00
-40.00
0
1
2
3
4
5
6
7
8
9
10
11
Input Frequency (GHz)
Figure 4 - Input Sensitivity @ -40, +25, +70 and +85°C
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13
ZL40815
Data Sheet
Phase Noise Measurement Graphs
Phase Noise (dBc/Hz)
ZL40815 Phase Noise vs Offset
Pin = 0dBm, Vcc = 5.25V, Temp = 25DegC
-130
-135
5GHz
-140
2GHz
-145
-150
0.1
1
10
100
Offset Frequency (kHz)
Figure 5 - ZL40815 Phase Noise vs Offset Frequency
Phase Noise (dBc/Hz)
ZL40815 Phase Noise vs Input Frequency
Pin = 0dBm, Vcc = 5.25V, Temp = 25 DegC
-130
-135
100Hz
1kHz
-140
10kHz
100kHz
-145
-150
0
1
2
3
4
5
6
Input Frequency (GHz)
Figure 6 - ZL40815 Phase Noise vs Input Frequency
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ZL40815
Data Sheet
Single Ended Output Power
The following graphs show how the output power varies with supply.
Differential output power will be 3 dB.
ZL8015_dev1_Pout_Frequency_sweep, Vcc = 4.75v
o/p level (dBm)
Device 1,Temperature = -40°C
Device 1,Temperature = 85°C
Device 1,Temperature = 25°C
2
1
0
-1
-2
-3
-4
-5
-6
1000000000
10000000000
i/p frequency (Hz)
Figure 7 - Pout, Freq, Temp @ Vcc = 4.75 V
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
Frequency_sweep, Vcc = 5v
o/p level (dBm)
Device 1,Temperature = -40°C
Device 1,Temperature = 85°C
Device 1,Temperature = 25°C
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
1000000000
10000000000
i/p frequency (MHz)
Figure 8 - Pout, Freq, Temp @ Vcc = 5 V
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
ZL40815_Pout_Frequency_sweep, Vcc = 5.25v
o/p level (dBm)
Device 1,Temperature = -40°C
Device 1,Temperature = 85°C
Device 1,Temperature = 25°C
2
1
0
-1
-2
-3
-4
-5
-6
1000000000
10000000000
i/p frequency (Hz)
Figure 9 - Pout, Freq, Temp @ Vcc = 5.25 V
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
10GHz Prescaler Input Impedance, VCC=5V
50
40
REAL
30
20
Ohms
10
0
-10
IMAGE
-20
-30
-40
-50
2
3
4
5
6
7
8
9
10
9
10
Frequency (GHz)
Figure 10 - Input Impedance of 10 GHz Prescalers
10GHz Prescaler Input Impedance, VCC=5V
50
40
REAL
30
20
Ohms
10
0
-10
IMAGE
-20
-30
-40
-50
2
3
4
5
6
7
8
Frequency (GHz)
Figure 11 - Input Impedance of 10 GHz Prescalers (Typical)
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ZL40815
Data Sheet
Oscillographs of the Divider Output Waveforms
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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ZL40815
Figure 14 and Figure 15 show the output waveforms with a lower input frequency.
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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Data Sheet
Package Code
c Zarlink Semiconductor 2003 All rights reserved.
ISSUE
ACN
DATE
APPRD.
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TECHNICAL DOCUMENTATION - NOT FOR RESALE