Document Outline
- Features
- Prescaler Modulus
- Applications
- Description
- Figure 1 - Functional Block Diagram
- Figure 2 - Pin Connections Top View
- Application Configuration
- Figure 3 - Recommended circuit configuration
- Circuit Options
- Input & Output Circuit
- Figure 4 - Input and Output Equivalent Circuit
- Figure 5 - ZL40803 Typical Phase Noise
- Absolute Maximum Ratings
- Operating Range
- AC/DC Electrical Characteristics
- Figure 6 - Typical Input Sensitivity (sine wave drive)
- Figure 7 - Single Ended AC Coupled Single Termination
- Figure 8 - ZL40803 Phase Noise vs Input Frequency
- Figure 9 - ZL40803 Pout vs Input Frequency (Vcc = 3.3V, T=25C, T=85C)
- Figure 10 - ZL40803 Pout vs Input Frequency (Vcc = 3.6V, T=25C, T=85C)
- Single Ended or Differential Load
- Figure 11 - ZL40803 Single Ended Out @ 5GHz +2dBm
- Figure 12 - ZL40803 Differential Out @ 5GHz +2dBm
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.
Features
3.45V Single Supply Operation
Low Power Dissipation: 250mW typ
Broadband: DC to 6GHz
SSB Phase Noise: 147dBc/Hz @ 10KHz
Pout 0dBm
Surface Mount Plastic Package: 8 SOIC
Prescaler Modulus
ZL40803 Divide by 2
Applications
DC to 6 GHz PLL applications
HyperLan
LMDS
Instrumentation
Satellite Communications
Fibre Optic Communications; OC48, OC192
Ultra Low Jitter Clock Systems
Description
The ZL40803 are Bipolar 3.45V supply, very low power
prescalers for professional applications with a fixed
modulus of 2. The ultra low close in (1KHz 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 6GHz.
See Figure 1 and Application Note for RF Prescalers for
more details.
July 2003
Ordering Information
ZL40803/DCA (tubes)
8 pin SOIC
ZL40803/DCB (tape and reel) 8 pin SOIC
-40
C to +85
C
ZL40803
6 GHz Fixed Modulus
2
Data Sheet
Figure 1 - Functional Block Diagram
Vref
Div N
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
ZL40803
Data Sheet
2
Zarlink Semiconductor Inc.
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.
Figure 3 - Recommended circuit configuration
This represents the circuit used to complete characterisation. 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. ZLE40803.
1
2
3
4
8
7
6
5
Vcc IN
INPUT
INPUT Bar
GND
Vcc OUT
OUTPUT
OUTPUT Bar
GND
SOIC (N)
Application Diagram
C5: 10nF
C2: 10nF
C1: 1nF
C6: 10nF
1
2
3
4
8
7
6
5
C3: 100pF
C4: 100pF
Rsource:
Rload
Rfilter
Note: Dotted Components Optional
Vcc
ZL40803
Data Sheet
3
Zarlink Semiconductor Inc.
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 s 0.35mA. 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
Figure 4 - Input and Output Equivalent Circuit
I/O Circuits
50 O
h
m
50 O
h
m
10mA
0.5pF
1.0nH
1.0nH
0.5pF
Vcc_Out
Output
Output Bar
Gnd
Vref
Gnd
Input
Input bar
Vcc_In
1.0nH
1.0nH
0.2pF
400
O
h
m
400
O
h
m
0.8pF
20mA
ZL40803
Data Sheet
4
Zarlink Semiconductor Inc.
Figure 5 - ZL40803 Typical Phase Noise
Absolute Maximum Ratings
Characteristic
Min
Max
Units
Comments
Supply Voltage (Vcc)
- 0.5
6
V
RFin
12
dBm
All I/O ports
-0.5V
Vcc+0.5
V
Storage Temperature
-55
150
C
ESD protection
2KV
Mil-std 883B / 3015 cat1
Operating Range
Characteristic
Min
Typ
Max
Units
Comments
Supply Voltage (Vcc)
3.3
3.6
V
RFin Frequency Range
0.1
6
GHz
Operating Junction Temperature
-40
+125
C
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
ZL40803 Phase Noise / Offset Frequency
T = 25C, Vcc =3.6V, Pin = -6dBm
-155
-150
-145
-140
-135
-130
-125
100
1000
10000
Frequency in Hz
Phase Noise in dBC/Hz
5GHz
3GHz
1GHz
ZL40803
Data Sheet
5
Zarlink Semiconductor Inc.
AC/DC Electrical Characteristics
These characteristics are guaranteed by design and characterisation over the following range of operating conditions unless otherwise stated:
Tamb = -40C to + 85C, Vcc = 3.3V to 3.6V.
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.
Electrical Characteristics
Characteristic
Pin
Min.
Typ.
Max.
Units
Conditions
Icc_in (Supply current)
1
0.35
mA
Icc_out (Supply current)
8
44
72
110
mA
Input frequency
2,3
1
6
GHz
RMS sinewave,
Input sensitivity
2,3
-20
-10
dBm
fin = 1GHz to 6GHz, Note1
Input overload
2,3
4
10
dBm
fin = 1GHz to 6GHz, Note1
Phase Noise
6,7
-150
dBC/Hz
@ 10KHz Offset Fin = 3GHz
Output voltage
6,7
1
Vp-p
Differential Into 50 ohm pull up
resistors
Output power
6,7
-7
-2
2
dBm
fin = 1GHz to 6GHz, Pin = -10dBm,
Note 2
Output t-rise
6,7
110
ps
fin = 1GHz to 6GHz, Pin = -10dBm
Output t-fall
6,7
110
ps
fin = 1GHz to 6GHz, Pin = -10dBm
T prop delay
2,6
250
ps
50% IN to 50% OUT
Jitter
6,7
0.1
ps
Output Duty Cycle
6,7
45
50
55
%
fin = 1GHz to 6GHz, In = -10dBm
Input. Edge Speed
2,3
500
V/us
For < 1GHz input operation
ZL40803
Data Sheet
6
Zarlink Semiconductor Inc.
Figure 6 - Typical Input Sensitivity (sine wave drive)
Figure 7 - Single Ended AC Coupled Single Termination
T yp ic al In p u t S e n s itiv ity (S in e wa v e D riv e )
-3 5
-3 0
-2 5
-2 0
-1 5
-1 0
-5
0
5
1 0
1 5
0
1
2
3
4
5
6
7
8
9
In p u t F re q u e n c y (G Hz )
V
i
n
in
to
5
0
O
h
m (d
B
m
)
G u aran te ed O p eratin g R an g e
-40C to 85 C
E d g e
S p e e d
>5 00 V /us
Vcc out
Gnd
50
O
h
m
50
O
h
m
50
O
h
m
50
O
h
m
Transmission Line
Pre-scaler Output
Optional
Balance
ZL40803
Data Sheet
7
Zarlink Semiconductor Inc.
Figure 8 - ZL40803 Phase Noise vs Input Frequency
Figure 9 - ZL40803 Pout vs Input Frequency
(Vcc = 3.3V, T=25C, T=85C)
ZL40803 Phase Noise / Fin
T =25C, Vcc = 3.6V, Pin = -6dBm
-150
-145
-140
-135
-130
-125
0
1
2
3
4
5
6
Fin in GHz
P
h
ase No
i
se i
n
d
BC/
Hz
100
1000
10000
100000
ZL40803 Frequency_sweep, Vcc = 3.3v
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
1.00E+09
1.00E+10
i/p frequency (Hz)
o/
p l
e
v
e
l
(d
Bm
)
Device 2,Temperature = -40C
Device 2,Temperature = 25C
Device 2,Temperature = 85C
ZL40803
Data Sheet
8
Zarlink Semiconductor Inc.
Figure 10 - ZL40803 Pout vs Input Frequency
(Vcc = 3.6V, T=25C, T=85C)
Frequency_sweep, Vcc = 3.6v
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
1.00E+09
1.00E+10
i/p frequency (Hz)
o/
p l
e
v
e
l
(d
B
m
)
Device 2,Temperature = -40C
Device 2,Temperature = 25C
Device 2,Temperature = 85C
ZL40803
Data Sheet
9
Zarlink Semiconductor Inc.
Single Ended or Differential Load
Figures 11 and 12 illustrate the output waveform when measured differential and single ended with a 5GHz
waveform at the input at a level of +2dBm. 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 3dB.
Differential Operation reduces the radiated EMI in the system and reduces the susceptibility to common mode
system noise.
Figure 11 - ZL40803 Single Ended Out @ 5GHz +2dBm
ZL40803
Data Sheet
10
Zarlink Semiconductor Inc.
Figure 12 - ZL40803 Differential Out @ 5GHz +2dBm
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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
conforms to the I
2
C Standard Specification as defined by Philips.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright Zarlink Semiconductor Inc. All Rights Reserved.
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