Document Outline
- Features
- Applications
- Description
- Pin Connections - Top View
- Applications Configuration
- Figure 2 - Recommended circuit configuration
- Evaluation Boards From Zarlink Semiconductor
- AC/DC Electrical Characteristics
- Electrical Characteristics (Tamb = 25C, Vcc = 5V)
- Figure 3 - Input Sensitivity @ +25 C
- Electrical Characteristics (Vcc = 5V 5%, Tamb = -40 to +85C)
- Input and Output Characteristics
- Figure 4 - Input Sensitivity @ -40, +25, +70 and +85 C
- Phase Noise Measurement Graphs
- Figure 5 - ZL40815 Phase Noise vs Offset Frequency
- Figure 6 - ZL40815 Phase Noise vs Input Frequency
- Single Ended Output Power
- Figure 7 - Pout, Freq, Temp @ Vcc = 4.75 V
- Figure 8 - Pout, Freq, Temp @ Vcc = 5 V
- Figure 9 - Pout, Freq, Temp @ Vcc = 5.25 V
- Figure 10 - Input Impedance of 10 GHz Prescalers
- Figure 11 - Input Impedance of 10 GHz Prescalers (Typical)
- Oscillographs of the Divider Output Waveforms
- 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
- 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
- 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.
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)
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
March 2006
Ordering Information
ZL40815DCE
8 Pin SOP/SOIC
Tubes, Bake & Drypack
ZL40815DCF
8 Pin SOP/SOIC
Tape & Reel,
Bake & Drypack
ZL40815DCF1
8 Pin SOP/SOIC*
Tape & Reel,
Bake & Drypack
ZL40815DCE1
8 Pin SOP/SOIC*
Tubes, Bake & Drypack
*Pb Free Matte Tin
-40
C to +85
C
ZL40815
10GHz Fixed Modulus
4
Data Sheet
Figure 1 - Block Diagram
Vref
Div 4
20mA
50 Ohm
400 Ohm
VCC IN
VCC OUT
OUTPUT
OUTPUT B
INPUT
INPUT B
GND
GND
1
2
3
4
8
7
6
5
ZL40815
Data Sheet
2
Zarlink Semiconductor Inc.
Pin Connections - Top View
Applications Configuration
Figure 2 shows a recommended application configuration. This example shows the devices set up 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 volt-
age transients on the power supply line.
Vcc INPUT
INPUT
INPUT B
GND
Vcc OUTPUT
OUTPUT
OUTPUT B
GND
1
2
3
4
5
6
7
8
SOIC (N) E-Pad
1
8
7
2
3
6
5
4
C2:10nF
C4:100pf
C5:100pf
C6:10nF
C7:10nF
Vcc 5V
Example Configuration for Single ended operation
C1:10uF
R2:50ohm
R1:50ohm
C3:100pF
R3:100ohm
C8:10nF
ZL40815
Data Sheet
3
Zarlink Semiconductor Inc.
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.
AC/DC Electrical Characteristics
Note 1: 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.
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Units
1
Supply voltage
Vcc
6.5
V
2
Prescaler Input Voltage
2.5
(Vdd_IO+5%)
Vp-p
3
ESD protection (Static Discharge)
2k
V
4
Storage temperature
T
ST
-65 +150
C
5
Maximum Junction Temp
T
J
max
+125
C
6
Thermal characteristics
TH
ja
58.6
C/W
multi-layer PCB
Electrical Characteristics
(Tamb = 25C, Vcc = 5V)
Characteristic
Pin
Min.
Typ.
Max.
Units
Conditions
Supply current
1
0.35
mA
Input stage bias current
Supply current
8
102
130
mA
Divider and output stages
Input frequency
2,3
2
11
GHz
RMS sinewave (see Note 1)
Input sensitivity
2,3
-8
dBm
fin = 1 GHz to 2 GHz
Input sensitivity
2,3
-15
-10
dBm
fin = 2 GHz to 9.5 GHz
Input sensitivity
2,3
-10
0
dBm
fin = 11 GHz
Input overload
2,3
8
dBm
fin = 1 GHz to 4 GHz
Input overload
2,3
11
dBm
fin = 5 GHz to 11 GHz
Input Edge Speed
2,3
900
V/s
For <2 GHz operation.
Output voltage
6,7
1
Vp-p
Differential Into 50 ohm pullup resistors
Output power
6,7
-3
-1
1.2
dBm
Single-ended output, fin = 2 GHz to 10 GHz,
pwr ip= -10 dBm
Phase Noise (10kHz
offset)
6,7
-146
dBc/Hz
Fin = 5 GHz, pwr ip = 0 dBm
See Figure 7 and Figure 8.
O/P Duty Cycle
6,7
45
50
55
%
ZL40815
Data Sheet
4
Zarlink Semiconductor Inc.
Figure 3 - Input Sensitivity @ +25C
Note 1: 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)
Electrical Characteristics
(Vcc = 5V 5%, Tamb = -40 to +85C)
Characteristic
Pin
Min.
Typ.
Max.
Units
Conditions
Supply current
1
0.35
mA
Input stage bias current (see Note 1)
Supply current
8
73
102
131
mA
-40C 5.25 V
Supply current
8
59
83
106
mA
-40C 4.75 V
Supply current
8
81
112
142
mA
+25C 5.25 V
Supply current
8
65
91
116
mA
+25C 4.75 V
Supply current
8
87
121
156
mA
+85C 5.25 V
Supply current
8
67
96
125
mA
+85C 4.75 V
or more
Typical input sensitivity (sinewave drive) @ +25 Deg C
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Input Frequency (GHz)
V
i
n
in
t
o
5
0
O
h
m
(d
B
m
)
25C
MAX (Typ)
GUARANTEED
OPERATING WINDOW
Input frequency extends to DC if the
source has an edge speed of 900 V/us or less
ZL40815
Data Sheet
5
Zarlink Semiconductor Inc.
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.
Figure 4 - Input Sensitivity @ -40, +25, +70 and +85C
Input and Output Characteristics
Characteristic
Pin
Min.
Typ.
Max.
Units
Conditions
Input sensitivity
2,3
-15
-10
dBm
Tamb = 85C, Fin = 2 to 8 GHz
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/s
For <2GHz Operation, see Note 1
Output voltage
6,7
1
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
110
ps
or more
Typical input sensitivity (sinewave drive) @ -40 to +85 Deg C
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Input Frequency (GHz)
V
i
n
in
to
5
0
O
h
m
(
d
B
m
)
85C
70
25C
-40C
MAX (Typ)
GUARANTEED
OPERATING WINDOW
85 Deg C
70 Deg C
25 Deg C
Input frequency extends to DC if the
source has an edgespeed of 900 V/us or less
ZL40815
Data Sheet
6
Zarlink Semiconductor Inc.
Phase Noise Measurement Graphs
Figure 5 - ZL40815 Phase Noise vs Offset Frequency
Figure 6 - ZL40815 Phase Noise vs Input Frequency
ZL40815 Phase Noise vs Offset
Pin = 0dBm, Vcc = 5.25V, Temp = 25DegC
-150
-145
-140
-135
-130
0.1
1
10
100
Offset Frequency (kHz)
P
h
ase N
o
i
se (
d
B
c
/
H
z
)
5GHz
2GHz
ZL40815 Phase Noise vs Input Frequency
Pin = 0dBm, Vcc = 5.25V, Temp = 25 DegC
-150
-145
-140
-135
-130
0
1
2
3
4
5
6
Input Frequency (GHz)
P
h
ase N
o
i
se (
d
B
c
/
H
z
)
100Hz
1kHz
10kHz
100kHz
ZL40815
Data Sheet
7
Zarlink Semiconductor Inc.
Single Ended Output Power
The following graphs show how the output power varies with supply.
Differential output power will be 3 dB.
Figure 7 - Pout, Freq, Temp @ Vcc = 4.75 V
ZL8015_dev1_Pout_Frequency_sweep, Vcc = 4.75v
-6
-5
-4
-3
-2
-1
0
1
2
1000000000
10000000000
i/p frequency (Hz)
o/p level (dBm)
Device 1,Temperature = -40C
Device 1,Temperature = 25C
Device 1,Temperature = 85C
ZL40815
Data Sheet
8
Zarlink Semiconductor Inc.
Figure 8 - Pout, Freq, Temp @ Vcc = 5 V
Frequency_sweep, Vcc = 5v
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
1000000000
10000000000
i/p frequency (MHz)
o/p level (dBm)
Device 1,Temperature = -40C
Device 1,Temperature = 25C
Device 1,Temperature = 85C
ZL40815
Data Sheet
9
Zarlink Semiconductor Inc.
Figure 9 - Pout, Freq, Temp @ Vcc = 5.25 V
ZL40815_Pout_Frequency_sweep, Vcc = 5.25v
-6
-5
-4
-3
-2
-1
0
1
2
1000000000
10000000000
i/p frequency (Hz)
o/p level (dBm)
Device 1,Temperature = -40C
Device 1,Temperature = 25C
Device 1,Temperature = 85C
ZL40815
Data Sheet
10
Zarlink Semiconductor Inc.
Figure 10 - Input Impedance of 10 GHz Prescalers
Figure 11 - Input Impedance of 10 GHz Prescalers (Typical)
10GHz Prescaler Input Impedance, VCC=5V
-50
-40
-30
-20
-10
0
10
20
30
40
50
2
3
4
5
6
7
8
9
10
Frequency (GHz)
Ohms
REAL
IMAGE
10GHz Prescaler Input Impedance, VCC=5V
-50
-40
-30
-20
-10
0
10
20
30
40
50
2
3
4
5
6
7
8
9
10
Frequency (GHz)
Ohm
s
REAL
IMAGE
ZL40815
Data Sheet
11
Zarlink Semiconductor Inc.
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
ZL40815
Data Sheet
12
Zarlink Semiconductor Inc.
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
c Zarlink Semiconductor 2003 All rights reserved.
APPRD.
ISSUE
DATE
ACN
Package Code
Previous package codes
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However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such
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not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in
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2
C components conveys a licence under the Philips I
2
C Patent rights to use these components in and I
2
C System, provided that the system
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2
C Standard Specification as defined by Philips.
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Copyright Zarlink Semiconductor Inc. All Rights Reserved.
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