AZP52 Low Phase Noise Sine Wave / CMOS to LVPECL Buffer / Translator www.azmicrotek.com FEATURES DESCRIPTION • The AZP52 is a sine wave/CMOS to LVPECL buffer/translator optimized for very low phase noise (-165dBc/Hz). It is particularly useful in converting crystal or SAW based oscillators into LVPECL outputs greater than 800MHz of bandwidth. For greater bandwidth, refer to the AZP63. • The AZP52 is one of a family of parts that provide options of fixed ÷1, fixed ÷2 and selectable ÷1, ÷2 modes as well as active high enable or active low enable to oscillator designers. Refer to Table 2 for the comparison of parts within the AZP5x and AZP63 family. • • LVPECL outputs optimized for very low phase noise (-165dBc/Hz) Greater than 800MHz bandwidth Fixed ÷2 output 3.0V to 3.6V operation BLOCK DIAGRAM VDD APPLICATIONS • • pull-up PECL clock sources Crystal or SAW based oscillators with LVPECL output EN (active high) D Q Q ÷2 Rbias PACKAGE AVAILABILITY • SC70-6 o Green/RoHS Compliant/Pb-Free GND VDD/2 Order Number 1 AZP52SG Package Marking SC70-6 C <Date Code>2 1 Tape & Reel - Add 'R1' at end of order number for 7in (1k parts), 'R2' (2.5k) for 13in 2 See www.azmicrotek.com for date code format www.azmicrotek.com +1-480-962-5881 Request a Sample 1630 S Stapley Dr, Suite 127 Mesa, AZ 85204 USA Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator PIN DESCRIPTION AND CONFIGURATION Table 1 - Pin Description Name VDD GND D EN Type Power Power Input Input Function Positive Supply Negative Supply Sine or CMOS Input Enable 5 Q Output LVPECL Output 6 Q Output LVPECL Output VDD 1 GND 2 D 3 C<Date Code> Pin 1 2 3 4 6 Q 5 Q 4 EN Figure 1 – Pin Configuration ENGINEERING NOTES FUNCTIONALITY The AZP52 is one of a family of parts that provide options of fixed ÷1, fixed ÷2 and selectable ÷1, ÷2 modes as well as active high enable or active low enable to oscillator designers. Table 2 details the differences between the parts to assist designers in selecting the optimal part for their design. Table 3 lists the specific AZP52 functional operation. Figure 2 plots the S-parameters of the D input. S-parameter and IBIS model files for the AZP52 are also available for download. Table 2 - AZP51-54 & AZP63 Family Part Number Divide Ratio EN Logic AZP51 AZP52 AZP53 AZP54 AZP63 ÷1 ÷2 Selectable ÷1 or ÷2 ÷1 Selectable ÷1 or ÷2 active HIGH active HIGH selectable active LOW selectable www.azmicrotek.com +1-480-962-5881 Request a Sample EN pullup/pull-down Pull-up Pull-up selectable Pull-down selectable Bandwidth > 800MHz > 800MHz > 800MHz > 800MHz ≥ 1GHz 2 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator Table 3 - AZP52 Functional Operation Inputs EN Part Number Outputs D High, NC1 AZP52 Low 1 Not connected 2 Don't care 3 Tri-State 4 Every other clock cycle Q 4 Q High4 Low Low High High4 Low4 X2 Z3 Z3 Figure 2- S11, Parameters, D Input www.azmicrotek.com +1-480-962-5881 Request a Sample 3 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator INPUT TERMINATION The D input bias is VDD/2 fed through an internal 10kΩ resistor. For clock applications, an input signal of at least 750mVpp ensures the AZP52 meets AC specifications. The input should also be AC coupled to maintain a 50% duty cycle on the outputs. The input can be driven to any voltage between 0V and VDD without damage or waveform degradation. Input signal D 10kΩ A/R VDD/2 Figure 3 - Input Termination OUTPUT TERMINATION TECHNIQUES The LVPECL compatible output stage of the AZP52 uses a current drive topology to maximize switching speed as illustrated below in Figure 4. Two current source PMOS transistors (M1-M2) feed the output pins. M5 is an NMOS current source which is switched by M3 and M4. When M4 is on, M5 takes current from M2. This produces an output current of 5.1mA (low output state). M3 is off, and the entire 21.1mA flows through the output pin. The associated output voltage swings match LVPECL levels when external 50Ω resistors terminate the outputs. Both Q and Q ¯ should always be terminated identically to avoid waveform distortion and circulating current caused by unsymmetrical loads. This rule should be followed even if only one output is in use. VDD (+3.3 V) Output Stage Vbp External Circuitry M2 M1 21.1mA 21.1mA Q Q M4 M3 D Vbn 21.1mA - High 5.1mA - Low M5 50Ω 50Ω VTT = VDD - 2.0V 16mA Figure 4 - Typical Output Termination www.azmicrotek.com +1-480-962-5881 Request a Sample 4 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator DUAL SUPPLY LVPECL OUTPUT TERMINATION The standard LVPECL loads are a pair of 50Ω resistors connected between the outputs and VDD-2.0V (Figure 4). The resistors provide both the DC and the AC loads, assuming 50Ω interconnect. If an additional supply is available within the application, a four resistor termination configuration is possible (Figure 5). VDD (+3.3 V) Output Stage Vbp VDD (+3.3 V) M2 M1 External Circuitry 130Ω 130Ω 82Ω 82Ω 21.1mA 21.1mA Q Q M4 M3 D 21.1mA - High 5.1mA - Low M5 Vbn 16mA Figure 5 - Dual Supply Output Termination THREE RESISTOR TERMINATION Another termination variant eliminates the need for the additional supply (Figure 6). Alternately three resistors and one capacitor accomplish the same termination and reduce power consumption. VDD (+3.3 V) Output Stage Vbp External Circuitry M2 M1 21.1mA 21.1mA Q Q M4 M3 D 21.1mA - High 5.1mA - Low 50Ω 0.01µF Vbn M5 50Ω 50Ω 16mA Figure 6 - Three Resistor Termination www.azmicrotek.com +1-480-962-5881 Request a Sample 5 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator EVALUATION BOARD (EBP53) Arizona Microtek’s evaluation board EBP53 provides the most convenient way to test and prototype AZP52 series circuits. Built for the AZP53Q 1.5x1.0 mm package, it is designed to support both dual and single supply operation. Dual supply operation (VDD=+2.0V, VSS=-1.3V) enables direct coupling to 50Ω time domain test equipment (Figure 7). VDD (+2.0 V) Output Stage Vbp Test Equipment Terminations M2 M1 21.1mA 21.1mA Q Q M4 M3 D Vbn 21.1mA - High 5.1mA - Low 50Ω 50Ω M5 16mA VSS (-1.3 V) Figure 7 - Split Supply LVPECL Output Termination AC TERMINATION Clock applications or phase noise/frequency domain testing scenarios typically require AC coupling. Figure 8 below shows the AC coupling technique. The 200Ω resistors form the required DC loads, and the 50Ω resistors provide the AC termination. The parallel combination of the 200Ω and 50Ω resistors results in a net 40Ω AC load termination. In many cases this will work well. If necessary, the 50Ω resistors can be increased to about 56Ω. Alternately, bias tees combined with current setting resistors will eliminate the lowered AC load impedance. The 50Ω resistors are typically connected to ground but can be connected to the bias level needed by the succeeding stage. www.azmicrotek.com +1-480-962-5881 Request a Sample 6 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 VDD (+3.3 V) Output Stage Vbp 21.1mA M4 M3 Vbn External Circuitry M2 M1 21.1mA D Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator 21.1mA - High 5.1mA - Low Q 0.01µF Q 0.01µF 200Ω 50Ω 200Ω M5 50Ω GND or VT 16mA Figure 8 - AC Termination PERFORMANCE DATA Table 4 - Absolute Maximum Ratings Absolute Maximum Ratings are those values beyond which device life may be impaired. Symbol Characteristic Rating Unit VDD Power Supply 0 to +5.5 V VI Input Voltage -0.5 to VDD + 0.5 V TA Operating Temperature Range -40 to +85 °C TSTG Storage Temperature Range -65 to +150 °C ESDHBM Human Body Model 2500 V ESDMM Machine Model 200 V ESDCDM Charged Device Model 2500 V www.azmicrotek.com +1-480-962-5881 Request a Sample 7 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator Table 5 - DC Characteristics DC Characteristics (VDD = 3.0V to 3.6V unless otherwise specified, TA = -40 to 85 °C) Symbol Characteristic Conditions -40 C VOH VOL 1 Output HIGH Voltage 25 C 1 Output LOW Voltage VDD = 3.3V Min Typ Unit Max 2.05 2.415 2.05 2.48 85 C 2.05 2.54 -40 C 1.365 1.615 1.43 1.68 1.49 1.74 EN=Low -10 10 μA 2 0.8 V 25 C VDD = 3.3V 85 C V V IZ Output Leakage Current, Tri-state2 VIH High Level Input Voltage EN VIL Low Level Input Voltage EN IPD Pull-down Current EN -2.2 μA RBIAS Bias Resistor D Input to Internal VDD/2 Reference 10k Ω IDD Power Supply Current 22 D Input ≤ VIL Power Supply Current IDDZ V 1 Outputs Tri-state 35 mA 8 mA EN=Low 1 Specified with outputs terminated through 50Ω resistors to VDD - 2V or Thevenin equivalent. 2 Measured at Q /Q pins. Table 6 - AC Characteristics AC Characteristics (VDD = 3.0V to 3.6V, TA = -40 to 85 °C) AC Specifications guaranteed by design Symbol tr / t f Characteristic Output Rise/Fall Min Typ Max Unit 250 ps 1,2 80 (20% - 80%) fMAX Maximum Input Frequency - Sine wave2 1300 MHz VINMAX Maximum Recommended Input Signal VDD Vpp VINMIN Minimum Recommended Input Signal 0.2 tPLH Propagation Delay 938 1614 ps tPHL Propagation Delay 938 1614 ps jRMS RMS Jitter: 12kHz - 20MHz, 155MHz Center Freq nP 1,2 Phase Noise - 1MHz offset Vpp 36 fs -165 dBc/Hz 1 Specified with outputs terminated through 50Ω resistors to VCC - 2V or Thevenin equivalent. 2 1.5 v p-p sine wave input, AC coupled to D pin. www.azmicrotek.com +1-480-962-5881 Request a Sample 8 Mar 2013, Rev 2.2 Arizona Microtek, Inc. AZP52 Low Phase Noise Sine Wave/CMOS to LVPECL Buffer/Translator PACKAGE DIAGRAM SC70-6 Green/RoHS compliant/Pb-Free MSL=1 Arizona Microtek, Inc. reserves the right to change circuitry and specifications at any time without prior notice. Arizona Microtek, Inc. makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Arizona Microtek, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Arizona Microtek, Inc. does not convey any license rights nor the rights of others. Arizona Microtek, Inc. products are not designed, intended or authorized for use as components in systems intended to support or sustain life, or for any other application in which the failure of the Arizona Microtek, Inc. product could create a situation where personal injury or death may occur. Should Buyer purchase or use Arizona Microtek, Inc. products for any such unintended or unauthorized application, Buyer shall indemnify and hold Arizona Microtek, Inc. and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Arizona Microtek, Inc. was negligent regarding the design or manufacture of the part. www.azmicrotek.com +1-480-962-5881 Request a Sample 9 Mar 2013, Rev 2.2