ZL40804 6 GHz Fixed Modulus ÷ 4 Data Sheet Features 3.45V Single Supply Operation Low Power Dissipation: 210mW typ Broadband: DC to 6GHz SSB Phase Noise: –150dBc/Hz @ 10KHz Pout 3dBm Prescaler Modulus Description ZL40804 – Divide by 4 Applications DC to 6 GHz PLL applications HyperLan LMDS Instrumentation Satellite Communications Fibre Optic Communications; OC48, OC192 Ultra Low Jitter Clock Systems The ZL40804 are Bipolar 3.45V supply, very low power prescalers for professional applications with a fixed modulus of 4. The ultra low close in (10KHz 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. Vcc_Out Vcc_In Block Diagram Vref Input Div N Output Output Bar 400 • • • • • • • -40°C to +85°C 200 • October 2002 Ordering Information ZL40804-DCA (tubes) 8 pin SOIC ZL40804-DCB (tape and reel) 8 pin SOIC 200 • • • • • Issue 1 10mA Input bar Gnd Gnd Figure 1 - Functional Block Diagram 1 ZL40804 Data Sheet Vcc IN 1 8 Vcc OUT INPUT 2 7 OUTPUT INPUT Bar 3 6 OUTPUT Bar GND 4 5 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. A pplication D iagram C 1: 1nF R filter C 3: 100pF R source: C 4: 100pF C 2: 10nF V cc 1 2 8 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 characterisation. The tabulated Electrical performance is guaranteed using this application circuit. A blank application board is available. 2 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 0.35mA. 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 Fig 4 shows the equivalent input and output circuit. Vcc_Out 1.0nH 0.2pF Input bar 1.0nH 400 Ohm Input 400 Ohm 0.5pF 0.5pF 50 Ohm Vref 50 Ohm I/O Circuits Vcc_In 1.0nH Output Output Bar 0.8pF 1.0nH 10mA Gnd Gnd Figure 4 - Input and Output Equivalent Circuit Zarlink Semiconductor Inc. 3 ZL40804 Data Sheet ZL40804 Phase Noise / Offset Frequency T =25C, Vcc =3.6V, Pin=-6dBm Phase Noise dBC/Hz -125 -130 -135 5GHz -140 3GHz -145 1GHz -150 -155 100 1000 10000 Offset Frequency Figure 5 - ZL40804 Typical Phase Noise 4 Zarlink Semiconductor Inc. 100000 ZL40804 Data Sheet 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 Zarlink Semiconductor Inc. 5 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 = 1GHz to 6GHz, Note 1 10 dBm fin = 1GHz to 6GHz, Note 1 6,7 -150 dBC/Hz @ 10KHz Offset Fin = 3GHz Output voltage 6,7 1 Vp-p Differential Into 50ohm pull up resistors Output power 6,7 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 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 = 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. 6 Zarlink Semiconductor Inc. ZL40804 Data Sheet Typical Input Sensitivity (Sinewave Drive) 15 5 0 Edge Speeed >500V/us -5 Guaranteed Operating Range -40C to 85C -10 -15 -20 -25 -30 -35 1 2 3 4 5 6 7 8 9 Input Frequency (GHz) Figure 6 - Typical Input Sensitivity (sine wave drive) Single Ended AC coupled Single Termination Vcc out 50 Ohm Gnd 50 Ohm Transmission Line 50 Ohm 0 50 Ohm Vin into 50 Ohm (dBm) 10 Optional Balance Pre-scaler Output Figure 7 - Single Ended AC Coupled Single Termination Zarlink Semiconductor Inc. 7 ZL40804 Data Sheet ZL40804 Phase Noise / Fin Phase Noise in dBC/Hz -125 -130 -135 100 1000 10000 100000 -140 -145 -150 -155 0 1 2 3 4 5 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 7.E+09 i/p frequency (MHz) Figure 9 - ZL40804 Pout vs Input Frequency (Vcc = 3.3V, T=25C, T=85C) 8 Zarlink Semiconductor Inc. 8.E+09 ZL40804 Data Sheet ZL40804_Dev1 Frequency_sweep, Vcc = 3.6v Device 1,Temperature = -40°C Device 1,Temperature = 25°C Device 1,Temperature = 85°C 3 o/p level (dBm) 2 1 0 -1 -2 -3 -4 0.E+00 1.E+09 2.E+09 3.E+09 4.E+09 5.E+09 6.E+09 7.E+09 8.E+09 i/p frequency (MHz) Figure 10 - ZL40804 Pout / Input Frequency (Vcc = 3.6V, T=25C, T=85C) Zarlink Semiconductor Inc. 9 ZL40804 Data Sheet 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 6dB output power. Differential Operation reduces the radiated EMI in the system and reduces the susceptibility to common mode system noise. Figure 11 - ZL40804 Single Ended Out @ 3GHz +2dBm 10 Zarlink Semiconductor Inc. ZL40804 Data Sheet Figure 12 - ZL40804 Differential Out @ 5GHz +2dBm Zarlink Semiconductor Inc. 11 ZL40804 12 Data Sheet Zarlink Semiconductor Inc. For more information about all Zarlink products visit our Web Site at www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is believed to be reliable. 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