ZL40812 ZL40812/DCE ZL40812/DCF OC192 ZLE40008 ZLE40810

10GHz Fixed Modulus ÷ 16 Data Sheet Features · · · · · · July 2003 Very High

ZL40812 ZL40812 10GHz Fixed Modulus ÷ 16 Data Sheet Features · · · · · · July 2003 Very High Operating Speed Operation down to DC with Square Wave Input Low Phase Noise (Typically better than 152dBc/Hz at 10kHz) 5V Single Supply Operation Low Power Dissipation: 500mW (Typ) Surface Mount Plastic Package With Exposed Pad (See Application Notes Ordering Information ZL40812/DCE ZL40812/DCE (tubes) 8 lead e-pad SOIC ZL40812/DCF ZL40812/DCF (tape and reel) 8 lead e-pad SOIC -40°C to +85°C Description Description The ZL40812 ZL40812 is one of a range of 5V supply, very high speed low power prescalers for professional applications with a fixed modulus of divide by 16. 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 pp output. See application notes for more details. Applications · · · · · · · DC to 10 GHz PLL applications HyperLan LMDS Instrumentation Satellite Communications Fibre Optic Communications; OC48, OC192 OC192 Ultra Low Jitter Clock Systems VCC IN VCC OUT 1 8 50 Ohm OUTPUT 7 6 OUTPUT B Vref Div 16 400 Ohm INPUT 2 INPUT B 3 20mA GND GND 4 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. ZL40812 ZL40812 Data Sheet Pin Connection - 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 Application 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 7 C6:10nF C4:100pf 3 R1:50ohm C1:10uF 8 2 C2:10nF 4 C7:10nF 6 5 C5:100pf 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 2 Zarlink Semiconductor Inc. ZL40812 ZL40812 Data Sheet Evaluation Boards From Zarlink Semiconductor Zarlink Semiconductor provides prescaler evaluation boards. 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, type No. ZLE40008 ZLE40008. Fully populated evaluation boards are also available, type No. ZLE40810 ZLE40810. 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 1 Supply Voltage 2 Prescaler Input Voltage 3 ESD protection (Static Discharge) 4 Storage temperature 5 Maximum Junction Temp 6 Thermal Characteristics Min Vcc Max Units 6.5V 2.5 2 150 ºC ºC 58.6 Thja kV 125 -65 TST Vp-p °C/W multi-layer PCB AC/DC Electrical Characteristics Electrical Characteristics (Tamb = 25C, Vcc = 5V) Characteristic Pin Min. Typ. Supply current 1 8 100 Input frequency 2,3 Input sensitivity 2,3 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 Units -8 Input sensitivity Max. 0.35 Supply current Conditions mA 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