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ZL40813/14/18
13.5GHz Fixed Modulus Dividers
Data Sheet
Features
•
•
•
•
•
Very High Operating Speed
Low Phase Noise (Typically better than
-146dBc/Hz at 10kHz offset)
5V Single Supply Operation
Low Power Dissipation: 500mW (Typ)
Surface Mount Plastic Package with Exposed
Pad (See Application Notes)
Ordering Information
ZL40813/DCE
ZL40813/DCF
ZL40814/DCE
ZL40814/DCF
ZL40818/DCE
ZL40818/DCF
(tubes)
8 pin SOIC
(tape and reel) 8 pin SOIC
(tubes)
8 pin SOIC
(tape and reel) 8 pin SOIC
(tubes)
8 pin SOIC
(tape and reel) 8 pin SOIC
July 2003
Prescaler Modulus
•
•
•
ZL40813 - Divide by 8
ZL40814 - Divide by 16
ZL40818 - Divide by 4
-40°C to +85°C
Description
The ZL40813, 14 and 18 are 5V supply, very high
speed low power prescalers for professional
applications with a fixed modulus of 8, 16, or 4
respectively. The dividing elements are dynamic D type
flip flops and allow operation from 10.5GHz to 13.5GHz
with a sinewave input (Note these prescalers are not
suitable for D.C. operation). The output stage has
internal 50 ohm pull up giving a 1v p-p output. See
application notes for more details.
Applications
•
•
•
•
•
•
10.5 to 13.5GHz PLL applications
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, Zarlink Semiconductor Inc. All Rights Reserved.
ZL40813/14/18
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
Figure 2 - Pin Connections - Top View
1.0
Application Configuration
Figure 3 shows a recommended application configuration. This example shows the devices set up for single-ended
input and differential output operation.
R2:100 Ohm
C8:10nF
C3:100pF
1
C4:100pF
C5:100pF
R1:50 Ohm
2
3
4
8
C6:100pF
7
6
C7:100pF
5
RL:50 Ohm
C2:10nF
C1:10uF
Figure 3 - 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. R2 (100 Ohm) and C8 (10 nF) can be included if further power supply decoupling is required for the first stage
biasing circuit. This may optimise 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.
2
Zarlink Semiconductor Inc.
ZL40813/14/18
2.0
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
Prescalar Input Voltage
ESD protection (Static
Discharge)
Storage Temperature
Maximum Junction Temp.
Thermal Characteristics
T
ST
T
J
max
TH
JA
58.6
Symbol
Vcc
2.5
2k
-65
+150
+125
Min
Max
6.5
(vdd_IO+5%)
Units
V
Vp-p
V
ºC
ºC
ºC/W
multi-layer PCB
AC/DC Electrical Characteristics (Tamb = 25C, Vcc = 5V)
†
Characteristic
Supply current
Supply current
Supply current
Supply current
Pin
1
8
8
8
58
61
61
Min.
Typ.
0.35
93
96
100
130
134
134
Max.
Units
mA
mA
mA
mA
Conditions
Input stage bias current
‡
ZL40813 Div8
ZL40814 Div16
ZL40818 Div4
† These characteristics are guaranteed by either production test or design.
‡ 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 3,).
3
Zarlink Semiconductor Inc.
ZL40813/14/18
Input and Output Characteristics
†
Characteristic
Input frequency
Input sensitivity
Input overload
Output voltage
Output power
Phase Noise
(10kHz offset)
O/P Duty Cycle
Pin
2,3
2,3
2,3
6,7
6,7
6,7
6,7
45
-6
10
Min.
8.5
-2
14
1
-1
-140
50
55
Typ.
Max.
14.5
2
Units
GHz
dBm
dBm
Vp-p
dBm
dBc/Hz
%
Conditions
RMS sinewave
‡
fin = 10.5GHz to 13.5Ghz
fin = 10.5GHz to 13.5Ghz
Data Sheet
Differential Into 50ohm pullup resistors
fin = 10.5GHz to 13.5GHz
fin = 10GHz, pwr ip = 0dBm
See graphs, Figure 7 to Figure 9
Differential output
† These characteristics are guaranteed by either production test or design.
† Input sensitivity and output power values assume 50 Ohm source and load impedances.
‡ The device characterisation test method incremented the amplitude over the entire range of frequency and ensures that there are no "holes"
in the characteristic.
For details of the test set-up, refer to the Application Note for RF Prescalers.
ZL40814 Typical I nput Sensitivity (Sinewave Drive) @ +25DegC
20.00
10.00
Guaranteed Operating Window
0.00
Vin i nto 50 Ohm(dBm)
-10.00
-20.00
-30.00
-40.00
8
9
10
11
12
Frequency (GHz)
13
14
15
16
Figure 4 - Graph of Input Sensitivity @ +25 Deg C
4
Zarlink Semiconductor Inc.
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