ZL40800 and ZL40802
6 GHz Fixed Modulus Prescalers
÷
8 and
÷
16
Data Sheet
Features
•
•
•
•
•
3.45V Single Supply Operation
Low Power Dissipation: 190mW typ
Broadband: DC to 6GHz
SSB Phase Noise (–153dBc/Hz @ 10KHz)
Pout 3dBm
Ordering Information
ZL40800/DCA
ZL40800/DCB
ZL40802/DCA
ZL40802/DCB
(tubes)
8 pin
(tape and reel) 8 pin
(tubes)
8 pin
(tape and reel) 8 pin
-40°C to 85°C
SOIC
SOIC
SOIC
SOIC
July 2003
Prescaler Modulus
•
•
ZL40800 – Divide by 8
ZL40802 – Divide by 16
Description
The ZL40800 and ZL40802 are Bipolar 3.45V supply,
very low power prescalers for professional applications
with a fixed modulus of 8 or 16. 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.
Applications
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•
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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
200 Ohm
VCC OUT
8
OUTPUT
7
6
OUTPUT B
Vref
Div N
400 Ohm
INPUT
2
INPUT B
3
•
10mA
GND
4
GND
5
Figure 1 - 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.
ZL40800 and ZL40802
Data Sheet
Vcc IN
INPUT
INPUT Bar
GND
1
2
3
4
8
7
6
5
Vcc OUT
OUTPUT
OUTPUT Bar
GND
SOIC (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.
Application Diagram
C1: 1nF
Rfilter
R1: 400
R2: 400
C2: 10nF
C3: 100pF
1
2
3
8
7
6
5
C5: 10nF
Rsource:
C4: 100pF
4
C6: 10nF
Rload
Note: Dotted Components Optional
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. Fully populated evaluation boards are also
available, type Nos. ZLE40800 and ZLE40802.
2
Zarlink Semiconductor Inc.
ZL40800 and ZL40802
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.
R1 and R2 400 Ohm Pull ups
are added to increase the headroom present at the amplifier output. This enhances
the operation at maximum supply and temperature. An alternative is to provide an inductive choke in place of R1
and R2.
These components provide a parallel DC Path to Vcc increasing the bandwidth of the output stage and providing a
virtually flat output power across frequency. See Fig 12 and 13.
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 and 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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•
200 Ohm
•
200 Ohm
•
0.5pF
0.5pF
Input
•
•
•
•
•
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1.0nH
1.0nH
Output
1.0nH
0.2pF
•
•
•
0.8pF
•
•
10mA
Output Bar
Input bar
1.0nH
Gnd
Gnd
•
•
Figure 4 - Input and Output Equivalent Circuit
3
Zarlink Semiconductor Inc.
ZL40800 and ZL40802
Increase Output Power Output Match and Narrow Band Operating Range
Data Sheet
The device has been characterised with a mismatch at the output. This is a broadband configuration. 3dB more
output power is available if the application matches the load to the output impedance.
ZL40802 Phase Noise vs Offset Freq
Pin = -6dBm, Vcc = 3.6V, Temp = 25C @ 1,3 & 5GHz
Phase Noise in dBC/Hz
-130
-135
-140
-145
-150
-155
-160
100
1000
10000
100000
Offset Frequency in Hz
Figure 5 - ZL40802 Typical Phase Noise
5GHz
3GHz
1GHz
Absolute Maximum Ratings
Parameter
1
2
3
4
5
Supply voltage
RFin
All I/O ports
ESD protection
Storage temperature
-0.5
2k
-55
+150
Symbol
Vcc
Min
-0.5
Max
6
12
+0.5
Units
V
dBm
V
V
Mil-std 883B / 3015 cat1
°C
Operating Ranage
Parameter
1
2
3
4
5
Supply voltage
RFin Frequency Range
Operating Junction Temperature
Junc’n to Amb’t resistance
Junc’n to Amb’t resistance
Rth (j-a)
Rth (j-c)
Symbol
Vcc
Min
3.3
0.1
-40
150
60
Max
3.6
6
125
Units
V
GHz
°C
°C/W
4 layer FR4 Board
°C/W
4 layer FR4 Board
4
Zarlink Semiconductor Inc.
ZL40800 and ZL40802
AC/DC Electrical Characteristics
Electrical Characteristics
†
Characteristic
Icc_in (Supply current)
Icc_out (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
Pin
1
8
8
2,3
2,3
2,3
6,7
6,7
6,7
6,7
6,7
2,6
6,7
6,7
2,3
45
500
-7
4
29
31
1
-20
10
-150
1
-2
110
110
250
0.1
50
55
2
Min.
Typ.
0.35
52
55
86
89
6
-10
Max.
Units
mA
mA
mA
GHz
dBm
dBm
dBC/Hz
Vp-p
dBm
ps
ps
ps
ps
%
V/us
Conditions
Data Sheet
ZL40800 Div8 & ZL40802 Div16
ZL40800 Div8
ZL40802 Div16
RMS sinewave,
fin = 1GHz to 6GHz, Note 1
fin = 1GHz to 6GHz, Note 1
@ 1KHz Offset Fin = 3GHz
Differential Into 50ohm pull up
resistors
fin = 1GHz to 6GHz, Pin = -10dBm
Note 2
fin = 1GHz to 6GHz, Pin = -10dBm
fin = 1GHz to 6GHz, Pin = -10dBm
50% IN to 50% OUT
fin = 1GHz to 6GHz, In = -10dBm
For < 1GHz input operation
† 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
5
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