ETC ZL40815

ZL40815
10GHz Fixed Modulus ÷ 4
Data Sheet
Features
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Issue 1
Very High Operating Speed
Operation down to DC with Square Wave Input
Low Phase Noise (Typically better than 150dBc/Hz at 1 kHz)
5V Single Supply Operation
Low Power Dissipation: 420mW (Typ)
Surface Mount Plastic Package With Exposed
Pad (See Application Notes)
Applications
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•
•
•
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DC to 10 GHz PLL applications
HyperLan
LMDS
Instrumentation
Satellite Communications
Fibre Optic Communications; OC48, OC192
Ultra Low Jitter Clock Systems
November 2002
Ordering Information
ZL40815/DCE (tubes)
8 lead e-pad SOIC
ZL40815/DCF (tape and reel) 8 lead e-pad SOIC
-40°C to +85°C
Description
The ZL40815 is one of a range of 5V supply, very high
speed, low power prescalers for professional
applications with a fixed modulus of divide by 4. The
dividing elements are static D type flip flops, and
therefore, allow operation down to DC if the drive signal
is a pulse waveform with fast risetimes. The output
stage has internal 50 ohm pull up giving a 1V p-p
output. See application notes for more details
VCC OUT
VCC IN
1
8
50R
7
OUTPUT
6
OUTPUT B
/4
400R
INPUT
INPUT B
2
20mA
3
4,5
GND
Figure 1 - Block Diagram
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ZL40815
Data Sheet
Pin Connections - Top View
Vcc INPUT
1
8
Vcc OUTPUT
INPUT
2
7
OUTPUT
INPUT B
3
6
OUTPUT B
4
5
GND
GND
SOIC (N) E-Pad
Applications Configuration
Figure 2 shows a recommended application configuration. This example shows the devices set up for single ended
operation.
Vcc 5V
R3:100ohm
C8:10nF
C3:100pF
1
8
2
7
C1:10uF
C6:10nF
C4:100pf
R1:50ohm
C2:10nF
3
6
4
5
C5:100pf
C7:10nF
R2:50ohm
Example Configuration for Single ended operation
Figure 2 - 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. R3 (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.
4. R2 (50 Ohm) and C7 (10 nF) will help to balance the current drawn from the power supply and may reduce voltage transients on the power supply line.
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
Evaluation Boards From Zarlink Semiconductor
Zarlink Semiconductor provide a prescaler evaluation board. 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. 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
Symbol
Min
1
Supply voltage
2
Prescaler Input Voltage
2.5
3
ESD protection (Static Discharge)
2k
4
Storage temperature
5
Maximum Junction Temp
6
Thermal characteristics
Max
Units
6.5
V
(Vdd_IO+5%)
Vp-p
Vcc
-65
TST
TJmax
THja
V
+150
°C
+125
°C
58.6
°C/W
multi-layer PCB
AC/DC Electrical Characteristics
Electrical Characteristics (Tamb = 25C, Vcc = 5V)†
Characteristic
Pin
Min.
Typ.
Supply current
1
0.35
Supply current
8
102
Input frequency
2,3
Input sensitivity
2,3
-8
Input sensitivity
2,3
-15
Input sensitivity
2,3
-10
Input overload
2,3
Input overload
2,3
Input Edge Speed
2,3
Output voltage
6,7
Output power
6,7
Phase Noise (10kHz
offset)
6,7
O/P Duty Cycle
6,7
Max.
Input stage bias current
130
mA
Divider and output stages
11
GHz
RMS sinewave, see Note 1
dBm
fin = 1GHz to 2GHz
-10
dBm
fin = 2GHz to 9.5GHz
0
dBm
fin = 11GHz
8
dBm
fin = 1GHz to 4GHz
11
dBm
fin = 5GHz to 11GHz
V/ìs
For <2GHz operation.
Vp-p
Differential Into 50ohm pullup resistors
dBm
Single-ended output, fin = 2GHz to 10GHz,
pwr ip= -10dBm
900
1
-1
1.2
-152
45
Conditions
mA
2
-3
Units
50
dBc/Hz
55
Fin = 5GHz, pwr ip = 0dBm
See graph, figure TBD
%
† The following characterization test method incremented the amplitude over the entire range of frequency and ensures that there are no
"holes" in the characteristic.
† The following characteristics are guaranteed by either production test or design.
Note 1: Input sensitivity and output power values assume 50 Ohm source and load impedances.
Zarlink Semiconductor Inc.
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ZL40815
Data Sheet
Typical input sensitivity (sinewave drive) @ +25 Deg C
20.00
Vin into 50 Ohm (dBm)
10.00
0.00
GUARANTEED
OPERATING WINDOW
25C
MAX (Typ)
-10.00
-20.00
Input frequency extends to DC if the
source has an edge speed of 900 V/us or
or more
less
-30.00
-40.00
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Input Frequency (GHz)
Electrical Characteristics (Vcc = 5V ±5%, Tamb = -40 to +85C)†
Characteristic
Pin
Min.
Typ.
Supply current
1
Supply current
8
73
102
Supply current
8
59
Supply current
8
Supply current
Max.
0.35
Units
Conditions
mA
Input stage bias current, see Note 1
131
mA
-40 degC 5.25V
83
106
mA
-40 degC 4.75V
81
112
142
mA
+25 degC 5.25V
8
65
91
116
mA
+25 degC 4.75V
Supply current
8
87
121
156
mA
+85 degC 5.25V
Supply current
8
67
96
125
mA
+85 degC 4.75V
† The characteristics are guaranteed by design and characterisation over the range of operating conditions unless otherwise stated:
‡ (Input Frequency range 1 to 10GHz rms Sinewave)
Note 1: 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 9).
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
Input and Output Characteristics†
Value
Characteristic
Pin
Units
Min.
Input sensitivity
2,3
Input overload
2,3
2
Input overload
2,3
Input overload
Typ.
Max.
-15
-10
Conditions
dBm
Tamb = 85C, Fin = 2 to 8 GHz
5
dBm
fin = 2 GHz
2
8
dBm
fin = 4 GHz
2,3
5
13
dBm
fin = 9 GHz
Input overload
2,3
5
11
dBm
fin = 10 GHz
Input Edge Speed
2,3
900
V/ìs
For <2GHz Operation, see Note 1
Output voltage
6,7
Vp-p
Differential Into 50ohm pullup resistors
Output power
6,7
-4
-1
2
dBm
Single-ended output, fin = 2GHz to
10GHz, pwr ip= -10dBm
O/P Duty Cycle
6,7
45
50
55
%
Trise and Tfall
6,7
1
110
ps
Note 1: Input sensitivity and output power values assume 50 Ohm source and load impedances.
Input sensitivity and output power values assume 50 Ohm source and load impedances.
For details of the test set-up, refer to the Application Note for RF Prescalers.
Zarlink Semiconductor Inc.
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ZL40815
Data Sheet
The following graph summarises the Input and Output Characteristics table.
Typical input sensitivity (sinewave drive) @ -40 to +85 Deg C
20.00
85 Deg C
70 Deg C
25 Deg C
Vin into 50 Ohm (dBm)
10.00
0.00
GUARANTEED
OPERATING WINDOW
85C
70
25C
-40C
MAX (Typ)
-10.00
-20.00
Input frequency extends to DC if the
source has an edgespeed of 900 V/us or
or more
less
-30.00
-40.00
0
1
2
3
4
5
6
7
8
9
10
11
12
Input Frequency (GHz)
Single Ended Output Power
The following graphs show how the output power varies with supply.
Differential output power will be 3dB.
ZL8015_dev1_Pout_Frequency_sweep, Vcc = 4.75v
o/p level (dBm)
Device 1,Temperature = -40°C
Device 1,Temperature = 85°C
Device 1,Temperature = 25°C
2
1
0
-1
-2
-3
-4
-5
-6
1000000000
10000000000
i/p frequency (Hz)
Figure 3 - Pout, Freq, Temp @ Vcc = 4.75V
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Zarlink Semiconductor Inc.
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ZL40815
Data Sheet
Frequency_sweep, Vcc = 5v
o/p level (dBm)
Device 1,Temperature = -40°C
Device 1,Temperature = 85°C
Device 1,Temperature = 25°C
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
1000000000
10000000000
i/p frequency (MHz)
Figure 4 - Pout, Freq, Temp @ Vcc = 5V
ZL40815_Pout_Frequency_sweep, Vcc = 5.25v
o/p level (dBm)
Device 1,Temperature = -40°C
Device 1,Temperature = 85°C
Device 1,Temperature = 25°C
2
1
0
-1
-2
-3
-4
-5
-6
1000000000
10000000000
i/p frequency (Hz)
Figure 5 - Pout, Freq, Temp @ Vcc = 5.25V
Zarlink Semiconductor Inc.
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ZL40815
Data Sheet
Oscillographs of the divider output waveforms
The following oscillographs show that the low-level feedthrough of the input waveform can be further reduced by
summing the two output pins of the device differentially, refer to Figure 6 and Figure 7.
Figure 6 - Feedthrough of the input single-ended-output configuration
VCC = 5V, Vin = 2dBm, Fin = 10GHz
Figure 7 - Feedthrough of the input using differential output configuration
VCC = 5V, Vin = 2dBm, Fin = 10GHz
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Zarlink Semiconductor Inc.
ZL40815
Data Sheet
Figure 8 and Figure 9 show the output waveforms with a lower input frequency.
Figure 8 - Differential output with small input amplitute waveform
VCC = 4.75V, Vin = 10dBm, Fin = 5GHz
Figure 9 - Differential output with lower frequency input
VCC = 4.75V, Vin = 10dBm, Fin = 2GHz
Zarlink Semiconductor Inc.
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ZL40815
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Data Sheet
Zarlink Semiconductor Inc.
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Copyright 2002, Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE