EVAL-ADCMP565BPZ

Evaluation Board for Dual Ultrafast Voltage Comparator EVAL-ADCMP565 threshold outputs where they must be jumpered to either the inverting or noninverting input for each comparator. FEATURES Standard SMA input/output connections High speed testing capability Dual ADCMP565 voltage comparator included Banana jack power supplies DC/AC inputs All ac inputs, including the latch enables, should be directly connected using a 50 Ω source and 50 Ω cable with SMA connectors. Likewise, the Q outputs should be monitored using an instrument that provides a 50 Ω termination. Note that this board is designed to enable full testing capability for both sides of the dual comparator. If testing only one side, no attention needs to be paid to the untested side. Latches, inputs, and outputs can be left unconnected on the unused side. APPLICATIONS General evaluation of the ADCMP565 Dual voltage comparator Assist future PCB layouts using the ADCMP565 ADCMP565 DEVICE DESCRIPTION PRODUCT DESCRIPTION The ADCMP565 evaluation board provides users with a straightforward means of examining the performance capabilities of the ADCMP565. It also enables general functionality of the ADCMP565. Currently, the evaluation board accommodates high performance testing; however, it has not yet been fully optimized to enable the highest bandwidth operations produced by the ADCMP565. A fast, high precision differential input stage permits consistent propagation delay with a wide variety of signals in the commonmode range from −2.0 V to +3.0 V. Outputs are complementary digital signals fully compatible with ECL 10 K and 10 KH logic families. The outputs provide sufficient drive current to directly drive transmission lines terminated in 50 Ω to −2 V. A latch input is included, which permits tracking, track-and-hold, or sample-and-hold modes of operation. 05823-018 Banana jacks are used to supply all necessary power to the evaluation board. The ADCMP565 requires supplies of −5.2 V and +5.0 V. The ADCMP565 evaluation board uses a −4.0 V supply that provides appropriate ECL termination for the outputs. Two dc threshold inputs are also user-supplied. If a dc threshold is desired, the two are routed on the board to The ADCMP565 is an ultrafast voltage comparator fabricated on Analog Devices’ proprietary XFCB process. The device features 300 ps propagation delay with less than 50 ps overdrive dispersion. Overdrive dispersion, a particularly important characteristic of high speed comparators, is a measure of the difference in propagation delay under differing overdrive conditions. Figure 1. Evaluation Board Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. EVAL-ADCMP565 TABLE OF CONTENTS Features ...................................................................................... 1 Outputs ..................................................................................3 Applications............................................................................... 1 Evaluation Board Layout .........................................................4 Product Description................................................................. 1 Typical Connection Diagram..............................................4 ADCMP565 Device Description............................................ 1 Schematic...............................................................................5 Revision History ....................................................................... 2 Layers .....................................................................................7 Evaluation Board Hardware .................................................... 3 Ordering Information ............................................................13 Power Supplies ...................................................................... 3 Ordering Guide...................................................................13 Inputs ..................................................................................... 3 ESD Caution........................................................................13 Latches ................................................................................... 3 REVISION HISTORY 1/06—Revision 0: Initial Version Rev. 0 | Page 2 of 16 EVAL-ADCMP565 EVALUATION BOARD HARDWARE POWER SUPPLIES INPUTS Power is supplied via color-coded banana jack plugs and all are decoupled on the board. There are four separate input pins on the ADCMP565. Likewise, there are four input SMA connectors distinctively labeled on this evaluation board. AC signals should be directly applied to one of these four input SMAs. If a dc threshold is desired, a small network is supplied that allows one dc source to be connected to any input pin and then changed as desired. The actual threshold is supplied via the blue banana jacks on both COMP A and COMP B. A connection is then from the banana jack (DC THRESHOLD IN) to an SMA connector (DC THRESHOLD OUT). From this point, the threshold can be jumpered using an SMA cable to any input pin desired. • Red is +5 V. • Yellow is –5.2 V. • Green is –4 V. The –4 V is not required by the part. Rather, this voltage is used to provide proper on-board ECL terminations for the part. • Two black jacks are for ground. • Two blue jacks are labeled DC THRESHOLD IN. For proper use of the blue jacks, see the Inputs section. Table 1. Connector Functions Name J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 TP1 (Black) TP2 (Red) TP3 (Yellow) TP4 (Green) TP5 (Blue) TP6 (Blue) TP9 (Black) Function Threshold_A Out Threshold_B Out QAbar QA QB QBbar LEAbar LEA LEBbar LEB IB+ IA+ IA− IB− GND VCC VEE −4V Threshold_A In Threshold_B In GND Note that every input trace continues by the pin and through a 50 Ω resistor to ground. This provides the option of using high speed AD signals for every input being used. If using a dc threshold on one of the input pins is desired, it is advisable to remove the 50 Ω resistor for that pin depending on how much current the supply can deliver. R1, R2, R3, and R4 correspond respectively to inputs IB, IA, IB, and IA. LATCHES Each half of the dual comparator has a latch enable and an inverted latch enable pin. These pins should be directly driven by connecting a source to each SMA connector. It is important to remember that the latches cannot be left unconnected. Proper levels must be provided for the ADCMP565 to function correctly. For correct logic levels in both compare and latch modes, please refer to the pin description in the ADCMP565 data sheet. OUTPUTS A resistor network on each output trace provides a very accurate ECL 50 Ω path to the output SMA connectors. By using any SMA-compatible cable, the outputs can be monitored on the 50 Ω equipment of the user’s choice. Rev. 0 | Page 3 of 16 EVAL-ADCMP565 EVALUATION BOARD LAYOUT The EVAL-ADCMP565 is designed to ensure that a high fidelity 50 Ω environment is maintained from input to output. Trace widths are carefully matched with the PCB material to produce a 50 Ω transmission line. Trace lengths are matched exactly for all inputs and latches. All outputs are also matched in length to each other. For specific part/pin information on the ADCMP565, please refer to the data sheet. TYPICAL CONNECTION DIAGRAM 50Ω SIGNAL SOURCES COAX JUMPER DC POWER SUPPLIES 50Ω SCOPE INPUTS THRESHOLD VOLTAGE ADCMP565 COAX JUMPER 50Ω SIGNAL SOURCES Figure 2. Rev. 0 | Page 4 of 16 05823-002 THRESHOLD VOLTAGE EVAL-ADCMP565 SCHEMATIC J3 J4 J6 J5 2OB AGND AGND AGND 20B AGND 20A R6 2OA 49. 9 R7 R5 49. 9 49. 9 0 J9 R19 R11 R8 49. 9 AGND - 4V R13 R15 100 100 R14 R18 4 18 GND 5 17 L EB AGND J10 7 15 L EB VEE 8 14 V CC R1 6 L EA 49. 9 16 ADCMP565 0 20 . 1UF OB R9 0 R10 49. 9 AGND C15 GND 6 AGND C14 L EA AGND J7 1 OA 3 . 1UF . 1UF 100 OB OA 19 100 C13 2 C12 AGND 49. 9 - 4V . 1UF J8 R2 4 R17 49. 9 AGND C19 13 12 11 9 C21 AGND 10 AGND AGND AGND IB IA . 1UF C20 IA 0 AGND R1 2 . 1UF C18 IB VEE 100PF VCC 100PF AGND AGND AGND R4 R3 R2 49. 9 R1 49. 9 AGND J13 AGND 49. 9 49. 9 J12 J11 J14 AGND AGND Figure 3.EVAL-ADCMP565 Schematic, Page 1 of 2 Rev. 0 | Page 5 of 16 AGND 05823-003 AGND EVAL-ADCMP565 TP2 RED 1 VCC TP1 BLK + C26 10µF C10 0.1µF C7 0.1µF C8 0.1µF C9 0.1µF 1 TP3 AGND YEL 1 VEE + TP4 C27 10µF C11 0.1µF C16 0.1µF C17 0.1µF C22 0.1µF AGND GRN 1 –4V + TP5 C28 10µF C25 0.1µF AGND J1 THRESHOLD_A + C29 10µF C4 0.1µF C5 0.1µF C6 0.1µF AGND BLU THRESHOLD_B 1 TP9 C24 0.1µF BLU 1 TP6 C23 0.1µF BLK + C30 10µF C1 0.1µF C2 0.1µF J2 C3 0.1µF AGND Figure 4. EVAL-ADCMP565 Schematic, Page 2 of 2 Rev. 0 | Page 6 of 16 05823-004 1 EVAL-ADCMP565 LAYERS 05823-006 05823-007 ADCMP565 The ADCMP565 evaluation board consists of eight layers (including both signal and power planes). The following pages represent these layers. Figure 6. Primary Solder Mask Figure 5. Primary Silkscreen Rev. 0 | Page 7 of 16 Figure 7. Layer 1 (Signal) 05823-009 05823-008 EVAL-ADCMP565 Figure 8. Layer 2 (GND 1) Rev. 0 | Page 8 of 16 05823-010 05823-011 EVAL-ADCMP565 Figure 10. Layer 4 (VEE) Figure 9. Layer 3 (−4 V) Rev. 0 | Page 9 of 16 05823-012 05823-013 EVAL-ADCMP565 Figure 12. Layer 6 (VCC) Figure 11. Layer 5 (GND2) Rev. 0 | Page 10 of 16 Figure 13. Layer 7 (GND 3) 05823-015 05823-014 EVAL-ADCMP565 Figure 14. Layer 8 (Signal) Rev. 0 | Page 11 of 16 Figure 15. Secondary Solder Mask 05823-017 05823-016 EVAL-ADCMP565 Figure 16. Secondary Silkscreen Rev. 0 | Page 12 of 16 EVAL-ADCMP565 ORDERING INFORMATION ORDERING GUIDE Model EVAL-ADCMP565BP Description Evaluation Board ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. 0 | Page 13 of 16 EVAL-ADCMP565 NOTES Rev. 0 | Page 14 of 16 EVAL-ADCMP565 NOTES Rev. 0 | Page 15 of 16 EVAL-ADCMP565 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB05823-0-1/06(0) Rev. 0 | Page 16 of 16