ZL40804DCF1

ZL40804
6 GHz Fixed Modulus ÷ 4
Data Sheet
Features
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•
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March 2006
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
Prescaler Modulus
•
Description
ZL40804 – Divide by 4
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.
Applications
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•
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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
DC to 6 GHz PLL applications
HyperLan
LMDS
Instrumentation
Satellite Communications
Fibre Optic Communications; OC48, OC192
Ultra Low Jitter Clock Systems
See Figure 1 and Application Note for RF Prescalers
for more details.
VCC IN
VCC OUT
8
1
50 Ohm
OUTPUT
7
6
OUTPUT B
Vref
Div N
400 Ohm
INPUT
2
INPUT B
3
•
20mA
GND
GND
5
4
Figure 1 - Functional Block Diagram
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Copyright 2003-2006, Zarlink Semiconductor Inc. All Rights Reserved.
ZL40804
Data Sheet
V cc IN
1
8
V cc O U T
IN P U T
2
7
OU TPU T
IN P U T B a r
3
6
O U T PU T B ar
GND
4
5
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 3: 100pF
R source:
C 4: 100pF
C 2: 10nF
V cc
1
8
2
7
3
6
4
5
C 5: 10nF
C 6: 10nF
R load
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
Data Sheet
Circuit Options
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
I/O Circuits
Vcc_In
Vref
•
1.0nH
Input bar
1.0nH
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•
•
•
0.5pF
•
1.0nH
0.8pF
•
Output Bar
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20mA
10mA
•
Output
1.0nH
•
•
0.2pF
•
400 Ohm
Input
400 Ohm
0.5pF
•
50 Ohm
•
50 Ohm
•
•
•
Gnd
Figure 4 - Input and Output Equivalent Circuit
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Zarlink Semiconductor Inc.
Gnd
ZL40804
Data Sheet
ZL40804 Phase Noise / Offset Frequency
T =25C, Vcc =3.6V, Pin=-6dBm
Phase Noise dBC/Hz
-125
-130
-135
-140
5GHz
3GHz
-145
1GHz
-150
-155
100
1000
10000
100000
Offset Frequency
Figure 5 - ZL40804 Typical Phase Noise
Absolute Maximum Ratings
Parameter
1
Supply voltage
2
RFin
3
All I/O ports
4
Storage temperature
5
ESD protection
Symbol
Min.
Max.
Units
Vcc
- 0.5
6
V
12
dBm
-0.5
Vcc+0.5
V
-55
150
°C
2
kV
TST
Comments
Mil-std 883B / 3015 cat1
Operating Range
Characteristic
Min.
Typ.
Max.
Units
Supply Voltage (Vcc)
3.3
3.6
V
RFin Frequency Range
0.1
6
GHz
Operating Junction Temperature
-40
+125
°C
Comments
Junc’n to Amb’t resistance Theta Ja
150
°C/W
4 layer FR4 Board
Junc’n to Case resistance Theta Jc
60
°C/W
4 layer FR4 Board
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Zarlink Semiconductor Inc.
ZL40804
Data Sheet
AC/DC Characteristics
Electrical Characteristics†
Characteristic
Pin
Min.
Icc_in (Supply current)
1
Icc_out (Supply current)
8
36
Input frequency
2,3
1
Input sensitivity
2,3
Input overload
2,3
Phase Noise
Typ.
Max.
0.35
Conditions
mA
96
mA
6
GHz
RMS sinewave,
-10
dBm
fin = 1 GHz to 6 GHz, Note 1
10
dBm
fin = 1 GHz to 6 GHz, Note 1
6,7
-150
dBC/Hz
@ 10 KHz Offset Fin = 3 GHz
Output voltage
6,7
1
Vp-p
Differential Into 50 ohm pull up resistors
Output power
6,7
dBm
fin = 1 GHz to 6 GHz, Pin = -10 dBm,
Note 2
Output t-rise
6,7
110
ps
fin = 1 GHz to 6 GHz, Pin = -10 dBm
Output t-fall
6,7
110
ps
fin = 1 GHz to 6 GHz, Pin = -10 dBm
T – prop delay
2,6
250
ps
50% IN to 50% OUT
0.1
ps
-20
4
-7
Jitter
Output Duty Cycle
Input. Edge Speed
6,7
61
Units
45
-2
50
2
55
500
%
V/us
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.
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ZL40804
Data Sheet
Typical Input Sensitivity (Sinewave Drive)
15
5
0
Edge
Speed
>500V/us
-5
-10
Guaranteed Operating Range
-40C to 85C
-15
-20
-25
-30
-35
1
2
3
4
5
6
7
Input Frequency (GHz)
Figure 6 - Typical Input Sensitivity (sine wave drive)
Vcc out
50 Ohm
50 Ohm
Transmission Line
50 Ohm
0
50 Ohm
Vin into 50 Ohm (dBm)
10
Gnd
Optional
Balance
Pre-scaler Output
Figure 7 - Single Ended AC Coupled Single Termination
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Zarlink Semiconductor Inc.
8
9
ZL40804
Data Sheet
ZL40804 Phase Noise / Fin
Phase Noise in dBC/Hz
-125
-130
100
1000
-135
-140
10000
100000
-145
-150
-155
0
2
4
6
Fin in GHz
Figure 8 - ZL40804 Phase Noise vs Input Frequency
ZL40804_Dev1 Frequency_sweep, Vcc = 3.3v
Device 1,Temperature = -40°C
Device 1,Temperature = 25°C
Device 1,Temperature = 85°C
2
1
o/p level (dBm)
0
-1
-2
-3
-4
-5
-6
0.E+00
1.E+09
2.E+09
3.E+09
4.E+09
5.E+09
6.E+09
i/p frequency (MHz)
Figure 9 - ZL40804 Pout vs Input Frequency
(Vcc = 3.3 V, T=25C, T=85C)
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Zarlink Semiconductor Inc.
7.E+09
8.E+09
ZL40804
Data Sheet
ZL40804_Dev1 Frequency_sweep, Vcc = 3.3v
Device 1,Temperature = -40°C
Device 1,Temperature = 25°C
Device 1,Temperature = 85°C
2
1
o/p level (dBm)
0
-1
-2
-3
-4
-5
-6
0.E+00
1.E+09
2.E+09
3.E+09
4.E+09
5.E+09
6.E+09
i/p frequency (MHz)
Figure 10 - ZL40804 Pout / Input Frequency
(Vcc = 3.6 V, T=25C, T=85C)
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Zarlink Semiconductor Inc.
7.E+09
8.E+09
ZL40804
Data Sheet
6GHz Prescaler Input Impedance, VCC=3.3V
50
40
30
REAL
20
Ohms
10
0
-10
-20
IMAGE
-30
-40
-50
1
2
3
4
5
6
7
Frequency (GHz)
Figure 11 - Input Impedance of 6 GHz Prescalers
6GHz Prescaler Input Impedance, VCC=3.3V
50
40
30
REAL
20
Ohms
10
0
-10
-20
IMAGE
-30
-40
-50
1
2
3
4
5
Frequency (GHz)
Figure 12 - Input Impedance of 6 GHz Prescalers (Typical)
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6
7
ZL40804
Data Sheet
Single Ended or Differential Load
Figures 11 and 12 illustrate the output waveform when measured differential and single ended with a 5 GHz
waveform at the input at a level of +2 dBm. The single ended output contains some input frequency break through
which contributes to the distortion present. This is a common mode signal which is rejected if the output is taken
differentially.
Differential operation also provides an additional 6 dB output power.
Differential Operation reduces the radiated EMI in the system and reduces the susceptibility to common mode
system noise.
Figure 13 - ZL40804 Single Ended Out @ 3 GHz +2 dBm
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ZL40804
Figure 14 - ZL40804 Differential Out @ 5 GHz +2 dBm
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Data Sheet
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