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ZL40803 6 GHz Fixed Modulus / 2
Data Sheet 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 Ordering Information ZL40803/DCA (tubes) 8 pin SOIC ZL40803/DCB (tape and reel) 8 pin SOIC -40C to +85C
January 2003
Prescaler Modulus
ZL40803 - Divide by 2
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.
Applications
* * * * * * * 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
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ZL40803
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 1 2 3 4 8 7 6 5 C2: 10nF
Vcc
C5: 10nF
C3: 100pF
Rsource:
C4: 100pF
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. A blank application board is available.
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Zarlink Semiconductor Inc.
Data Sheet
Circuit Options
ZL40803
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
*
Vcc_Out
Vcc_In Vref
I/O Circuits
400 Ohm 400 Ohm
*
0.5pF
*
50 Ohm
*
50 Ohm
*
0.5pF 1.0nH 1.0nH
Output
*
Input
* * Input bar
*
*
*
1.0nH 0.2pF 1.0nH
* * *
0.8pF
* *
20mA 10mA
Output Bar
Gnd
Gnd
*
*
Figure 4 - Input and Output Equivalent Circuit
Zarlink Semiconductor Inc.
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ZL40803
Data Sheet
ZL40803 Phase Noise / Offset Frequency T = 25C, Vcc =3.6V, Pin = -6dBm Phase Noise in dBC/Hz -125 -130 -135 -140 -145 -150 -155 100 1000 10000 5GHz 3GHz 1GHz
Frequency in Hz
Figure 5 - ZL40803 Typical Phase Noise Absolute Maximum Ratings Characteristic Supply Voltage (Vcc) RFin All I/O ports Storage Temperature ESD protection 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 -0.5V -55 2KV Min - 0.5 Max 6 12 Vcc+0.5 150 Units V dBm V C Mil-std 883B / 3015 cat1 Comments
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Zarlink Semiconductor Inc.
Data Sheet AC/DC Electrical 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 Pin 1 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 44 1 -20 10 -150 1 -2 110 110 250 0.1 50 55 2 Min. Typ. 0.35 72 110 6 -10 Max. Units mA mA GHz dBm dBm dBC/Hz Vp-p dBm ps ps ps ps % V/us RMS sinewave,
ZL40803
Conditions
fin = 1GHz to 6GHz, Note1 fin = 1GHz to 6GHz, Note1 @ 10KHz Offset Fin = 3GHz Differential Into 50 ohm 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.
For details of the test set-up, refer to the Application Note for RF Prescalers.
Zarlink Semiconductor Inc.
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ZL40803
Data Sheet
T ypic a l Inp u t S en s itiv ity (Sin ewav e D riv e ) 15 10 Vin into 50 Ohm (dBm) 5 0 -5 -1 0 -1 5 -2 0 -2 5 -3 0 -3 5 0 1 2 3 4 5 6 7 8 9 In pu t F re q ue n c y (G Hz )
Edge Speed >5 0 0 V /us
G u aran teed O p eratin g R an g e -40C to 85C
Figure 6 - Typical Input Sensitivity (sine wave drive)
Vcc out
50 Ohm
50 Ohm
Transmission Line 50 Ohm 50 Ohm Optional Balance
Gnd Pre-scaler Output
Figure 7 - Single Ended AC Coupled Single Termination
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Zarlink Semiconductor Inc.
Data Sheet
ZL40803
ZL40803 Phase Noise / Fin T =25C, Vcc = 3.6V, Pin = -6dBm
Phase Noise in dBC/Hz
-125 -130 -135 -140 -145 -150 100 1000 10000 100000
0
1
2
3 Fin in GHz
4
5
6
Figure 8 - ZL40803 Phase Noise vs Input Frequency
ZL40803 Frequency_sweep, Vcc = 3.3v Device 2,Temperature = -40C 2 1 0 o/p level (dBm) -1 -2 -3 -4 -5 -6 -7 -8 1.00E+09 i/p frequency (Hz) 1.00E+10 Device 2,Temperature = 25C Device 2,Temperature = 85C
Figure 9 - ZL40803 Pout vs Input Frequency (Vcc = 3.3V, T=25C, T=85C)
Zarlink Semiconductor Inc.
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ZL40803
Data Sheet
Frequency_sweep, Vcc = 3.6v Device 2,Temperature = -40C Device 2,Temperature = 85C 4 3 2 1 o/p level (dBm) 0 -1 -2 -3 -4 -5 -6 -7 -8 1.00E+09 i/p frequency (Hz) 1.00E+10 Device 2,Temperature = 25C
Figure 10 - ZL40803 Pout vs Input Frequency (Vcc = 3.6V, T=25C, T=85C)
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Zarlink Semiconductor Inc.
Data Sheet Single Ended or Differential Load
ZL40803
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
Zarlink Semiconductor Inc.
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ZL40803
Data Sheet
Figure 12 - ZL40803 Differential Out @ 5GHz +2dBm
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Zarlink Semiconductor Inc.
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