ZL40804
6 GHz Fixed Modulus
÷
4
Data Sheet
Features
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•
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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
-40°C to +85°C
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
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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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Zarlink Semiconductor Inc.
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
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50 Ohm
•
50 Ohm
•
0.5pF
0.5pF
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•
•
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1.0nH
1.0nH
Output
Input
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•
1.0nH
0.2pF
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0.8pF
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20mA
10mA
Output Bar
Input bar
1.0nH
Gnd
•
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Gnd
Figure 4 - Input and Output Equivalent Circuit
3
Zarlink Semiconductor Inc.
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
T
ST
-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
4
Zarlink Semiconductor Inc.
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.
5
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