Evaluation Board for ADCMP572/ ADCMP573/ADCMP580/ADCMP581/ADCMP582 EVAL-ADCMP572/573/580/581/582 GENERAL DESCRIPTION EVALUATION BOARD DESCRIPTION This document provides an overview and suggested lab test setups of the evaluation board for Analog Devices’ new ADCMP572/ ADCMP573/ADCMP580/ADCMP581/ADCMP582 comparator products. Because these comparators represent state of the art, general-purpose comparator technology, it is important that their performance characteristics be evaluated using the highest bandwidth components available. The evaluation board provides a relatively high quality environment in which to make such measurements. All five device types are fully released to production. Figure 1 is a photograph of the top of the evaluation board. It is fabricated using a high quality dielectric material between the ground plane and signal layers in order to maintain high signal integrity. All input and output signals are brought on to the board with 2.9 mm RF connectors, and transmission line paths are kept as close to 50 Ω as possible. PACKAGE LIST • Evaluation board with component installed • Schematic This document should be used in conjunction with the ADCMP57x/ADCMP58x data sheets that contain full technical details on the device specifications and operation. The same PCB is used to evaluate the ADCMP572, ADCMP573, ADCMP580, ADCMP581, and ADCMP580. 05821-001 EVALUATION BOARD Figure 1. ADCMP572/ADCMP573/ADCMP580/ADCMP581/ADCMP5822 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-ADCMP572/573/580/581/582 TABLE OF CONTENTS General Description ......................................................................... 1 Setup Input Signals........................................................................8 Evaluation Board Description......................................................... 1 Connect Output Signals ...............................................................8 Package List ....................................................................................... 1 Jumper Setup......................................................................................9 Evaluation Board .............................................................................. 1 Test Setup......................................................................................... 10 Revision History ............................................................................... 2 Additional Support..................................................................... 10 Using the Evaluation Board............................................................. 3 Schematics ....................................................................................... 11 Measurements ............................................................................... 3 Ordering Information.................................................................... 20 Setting Up the Evaluation Board .................................................... 4 Ordering Guide .......................................................................... 20 Connect Power.............................................................................. 4 ESD Caution................................................................................ 20 Connect Inputs ............................................................................. 8 REVISION HISTORY 2/06—Revision 0: Initial Version Rev. 0 | Page 2 of 20 EVAL-ADCMP572/573/580/581/582 USING THE EVALUATION BOARD MEASUREMENTS Table 1. Basic Equipment The same PCB is used to evaluate both ADCMP57x and ADCMP58x families. The Setting Up the Evaluation Board section describes the measurements that can be performed with this evaluation board. Description Power Supply with Three Outputs Pulse Generator Signal Analyzer Source Meter Matched High Speed Cables with 2.9 mm Connectors 1 2 Example Equipment 1 Agilent E3631A Quantity 2 HP8133A, Agilent 81134A CSA 8000 with 80E04 sampling head 2 Keithley 2400 SourceMeter, Keithley 238 high current source-measure unit Insulated Wire Inc. kps1501-180-kps Florida RF LABS LAB-FLEX 160 2Y194 1 1 1 4 Equipment used to generate example measurements within this document. 20 GHz sampling head used for all time measurements. Rev. 0 | Page 3 of 20 EVAL-ADCMP572/573/580/581/582 SETTING UP THE EVALUATION BOARD CONNECT POWER Several power supply levels must be provided to the board for VCCI, VCCO, VEE, VTT, CGND (the comparator’s GND pin), and GND via the banana jacks. Make a direct connection from the DUT output pins to the oscilloscope because any transmission line discontinuity degrades performance. The flexible power supply scheme of the ADCMP572/ADCMP573 comparators can be confusing with VTT at system ground. The GND pin on the comparator is no longer at GND dc potential, except for the ADCMP580, and, therefore, is named CGND on the board. Because of this, VTT is always at GND and therefore, VCCO = VTT (GND) + 2.0 V for the ECL/PECL ADCMP573/ADCMP581/ ADCMP582, and VCCO = VTT = GND for the CML type ADCMP572 and GND = CGND = VTT only for the CML ADCMP580, as detailed in Table 2 through Table 4. Table 2. ADCMP580/ADCMP581 Power Supply Connections Pin No. 5, 16 9, 12 13 14 8 15 ADCMP580 (CML) 1 5.0 V 0.0 V −5.0 V −5.0 V 0V 0.0 V 0V Mnemonic VCCI (Red) GND (Purple) (also CGND for these devices) VEE (Orange) HYS (Orange) VTT (Green) CGND (Brown) 3 GND Plane (Black) 4 ADCMP581(NECL) 2 7.0 V 2.0 V −3.0 V −3.0 V 0V 2.0 V 0V 1 VCCI = 5.0 V, VCCO = 0 V, VEE = −5.0 V. VCCI = 5.0 V, VCCO = 0 V, VEE = −5.0 V. 3 CGND is the comparator ground (Pin 15) renamed. 4 GND is always system ground. 2 VCCI VCCI VP 2 GND + VTP VP 9, 12 11 ADCMP580 VN VTN HYS 14 13 15 8 + 9, 12 11 ADCMP581 10 VTN VTT LE INPUT HYS LE INPUT Q OUTPUT – 4 14 13 15 7 6 8 VTT LE INPUT LE INPUT VEE GND 05821-023 VEE GND NOTES 1. FOR ADCMP580 CGND = GND. 3 Q OUTPUT RSECL Q OUTPUT VN 7 6 GND Q OUTPUT – 4 2 CML 10 3 5, 16 1 NOTES 1. GND HERE BECOMES BOARD CGND. Figure 3. ADCMP581 Power Supply Connections Figure 2. ADCMP580 Power Supply Connections Rev. 0 | Page 4 of 20 05821-024 VTP 5, 16 1 EVAL-ADCMP572/573/580/581/582 Table 3. ADCMP582 Power Supply Connections Pin No. 5, 16 9, 12 13 14 8 15 Mnemonic VCCI (Red) VCCO (Purple) VEE (Orange) HYS VTT (Green) CGND (Brown) 3 GND Plane (Black) 4 ADCMP582(PECL) 1 2.0 V 2.0 V −8.0 V −8.0 V 0V −3.0 V 0V ADCMP582(PECL) 2 3.7 V 2.0 V −6.3 V −6.3 V 0V −1.3 V 0V ADCMP582(PECL) 4.5 V 2.0 V −5.5 V −5.5 V 0V −0.5 V 0V 1 VCCI = 5.0 V, VCCO = 5.0 V, VEE = −5.0 V. VCCI = 5.0 V, VCCO = 3.3 V, VEE = −5.0 V. 3 CGND is the comparator ground (Pin 15) renamed. 4 GND is always system ground. 2 VCCI VTP VP 5, 16 1 2 VCCO + 9, 12 11 ADCMP582 RSPECL 10 VN VTN HYS 3 Q OUTPUT Q OUTPUT – 4 14 13 15 7 6 8 VTT LE INPUT LE INPUT NOTES 1. GND HERE BECOMES BOARD CGND. Figure 4. ADCMP582 Power Supply Connections Rev. 0 | Page 5 of 20 05821-025 VEE GND EVAL-ADCMP572/573/580/581/582 Table 4. ADCMP572 Power Supply and Input Translation Pin VCCI VCCO CGND VTP_F/VTN_F VTT VP/VN LE/LE AGND (This is not a pin in the part.) Case 1 1 0.0 V 0.0 V −3.3 V 0V 0.0 V −3.5V < VN/VP <−2.1V 0.0 V/−0.4 V 0.0 V Case 2 2 1.9 V 0.0 V −3.3 V 0V 0.0 V −3.5 V < VP/VN < −0.1 V 0.0 V/−0.4 V 0.0 V Case 3 3 0.0 V 0.0 V −5.2 V 0V 0.0 V −5.4 V < VP/VN < −2.0 V 0.0 V/−0.4 V 0.0 V 1 VCCI = VCCO = 3.3 V. VCCI = 5.2 V, VCCO = 3.3 V. 3 VCCI = VCCO = 5.2 V. 2 VCCI VTP VP 5, 16 1 2 VCCO + 9, 12 11 ADCMP572 RSPECL 10 VN VTN HYS 3 Q OUTPUT Q OUTPUT – 4 14 13 15 7 6 8 VTT LE INPUT LE INPUT NOTES 1. GND HERE BECOMES BOARD CGND. Figure 5. ADCMP572 Power Supply Connections Rev. 0 | Page 6 of 20 05821-021 GND GND EVAL-ADCMP572/573/580/581/582 Table 5. ADCMP573 Power Supply and Input Translation Pin VCCI VCCO CGND VTP_F/VTN_F VTT VP/VN LE/LE AGND This is not a pin in the part. Case 1 1 2.0 V 2.0 V −1.3 V 0V 0.0 V −1.5V < VN/VP < −0.1 V 1.2 V/0.8V 0.0 V Case 2 2 3.9 V 2.0 V −1.3 V 0V 0.0 V −1.5 V < VP/VN < +1.9 V 1.2 V/0.8 V 0.0 V Case 3 3 2.0 V 2.0 V −3.2 V 0V 0.0 V −3.4 V < VP/VN < 0.0 V 1.2 V/0.8 V 0.0 V 1 VCCI = VCCO = 3.3 V. VCCI = 5.2 V, VCCO = 3.3 V. 3 VCCI = VCCO = 5.2 V. 2 VCCI VTP VP 5, 16 1 2 VCCO + 9, 12 11 ADCMP573 CML 10 VN VTN HYS 3 Q OUTPUT Q OUTPUT – 4 14 13 15 7 6 8 VTT LE INPUT LE INPUT Figure 6. ADCMP573 Power Supply Connections Rev. 0 | Page 7 of 20 05821-022 GND GND NOTES 1. GND HERE BECOMES BOARD CGND. EVAL-ADCMP572/573/580/581/582 Set voltage termination VTP_F and VTN_F to GND to terminate the on-chip, 50 Ω input resistors. CONNECT INPUTS Connect the differential output of the generator to the differential comparator input pins of the device, VP and VN. Leave the hysteresis control pin, HYS, open for zero hysteresis or connect the HYS pin to VEE with a suitably sized resistor to add the desired amount of hysteresis. Connect the differential data output of the generator to the differential latch input of the device, LE and LE. CONNECT OUTPUT SIGNALS SETUP INPUT SIGNALS Connect the output of the comparator, Q and QB, to the signal analyzer. The sampling head must have an internal 50 Ω termination to ground. Input and latch levels must be shifted consistently with the power supplies (see Table 4 through Table 7). Table 6. ADCMP580/ADCMP581 Input Signal and Latch Setup Pin 2, 3 1, 4 6, 7 1 2 Mnemonic VP/VN VTP_F/VTN_F (Blue) LE/LE ADCMP580 (CML) 1 −2.0 V < VP/VN < +3.0 V 0V 0.0 V/−0.4 V ADCMP581(NECL) 2 0.0 V < VP/VN < +5.0 V 0V 0.8 V/0.4 V VCCI = 5.0 V, VCCO = 0 V, VEE = −5.0 V. VCCI = 5.0 V, VCCO = 0 V, VEE = −5.0V. Table 7. ADCMP582 Input Signal and Latch Setup Pin Mnemonic ADCMP582(PECL) 1 ADCMP582(PECL) 2 ADCMP582(PECL) 3 2, 3 VP/VN −5.0 V < VP/VN < 0.0 V −3.3 V < VP/VN < 1.7 V −2.5 V < VP/VN < 2.5 V 1, 4 VTP_F/VTN_F (Blue) 0V 0V 0V 6, 7 LE/LE 0.8 V/0.4 V 0.8 V/0.4 V 0.8 V/0.4 V 1 2 3 VCCI = 5.0 V, VCCO = 5.0 V, VEE = −5.0 V VCCI = 5.0 V, VCCO = 3.3 V, VEE = −5.0 V VCCI = 5.0 V, VCCO = 2.5 V, VEE = −5.0 V Rev. 0 | Page 8 of 20 EVAL-ADCMP572/573/580/581/582 JUMPER SETUP This evaluation board works with five different comparators, the ADCMP572/ADCMP573 and the ADCMP580/ ADCMP581/ADCMP582. To reduce the number of wires to the power supply, jumpers are provided wherever comparator supplies might be rerouted. When a comparator is mounted onto the board, the jumpers should be set properly for that product. The user does not have to adjust Jumper 1, Jumper 2, and Jumper 3 unless a new device type is soldered onto the board. If the evaluation board is to be used for a different comparator type than was mounted on the board originally, pull all the jumpers to prevent errors. Once the new part type is installed, the jumpers can be reinstalled. Table 8 gives the correct jumper settings and resulting banana jack connections for each of the comparator products. Set conservative current limits on all power supplies. Table 8. Jumper Connections Jumper P1 P2 P3 P4/P5 P4 P5 ADCMP572/ADCMP573 Short 1, 2 (TP10) Short 2, 3 (TP9) Short 1, 2 (TP2/GND) Short 2, 3 Short 2, 3 Short 1, 2 Short 1, 2 Short 2, 3 ADCMP580/ADCMP581 Short 2, 3 (TP6) Short 1, 2 (TP10) Short 1, 2 (TP2/GND) Short 2, 3 Short 2, 3 Short 1, 2 Short 1, 2 Short 2, 3 Rev. 0 | Page 9 of 20 ADCMP582 Short 2, 3 (TP6) Short 2, 3 (TP9) Short 1, 2 (TP2/GND) Short 2, 3 Short 2, 3 Short 1, 2 Short 1, 2 Short 2, 3 Conditions Device VEE/GND Device VCCO Device VTT VP/VN as a differential input Drive VP Drive VN DC Bias VN DC Bias VP EVAL-ADCMP572/573/580/581/582 TEST SETUP ADDITIONAL SUPPORT Figure 2 shows Analog Devices’ test configuration setup that was used for much of the initial engineering evaluation. It is provided here as a guideline and to assist in replicating our setup. For further support regarding the ADCMP572/ADCMP573 and ADCMP580/ADCMP581/ADCMP582 comparators and/or evaluation boards, refer to www.analog.com. 80E04 TRIGGER PICOSECOND PULSE LABS 5361 5x PICKOFF TEE AGILENT E3631A TRIPLE POWER SUPPLY LE LE VN Q VP Q FLORIDA RF LAB-FLEX 160 2Y 194 KEITHLEY 2400 SOURCE METER 05821-001 ADCMP58x EVALUATION BOARD Figure 7. Typical Test Setup for Measuring Performance Rev. 0 | Page 10 of 20 MOLEX22-03-2031 CGND TP1 RED 1 JP1 OPEN .1UF APLANE 11 12 2 C50 C9 .1UF APLANE APLANE VEE_CGND C49 .1UF RED C5 VEE/GND Q VCC0_1 9 10 C48 TP4 VTP VP Q VCC0_2 .1UF C29 1 C69 P4 2 VN C31 .1UF 1 APLANE 3 .1UF C4 APLANE VP 4 1 VN 2 1 P1 3 CGND MOLEX22-03-2031 APLANE VCC0 MOLEX22-03-2031 CGND MOLEX22-03-2031 VEE 2 1 P2 3 2 1 P3 3 Q Q APLANE J5 2.9mm APLANE J6 2.9mm Figure 8. Schematic, Main VTP VTN VCC0_CGND VTT_GND VTT_PLANE Rev. 0 | Page 11 of 20 APLANE J2 VTN APLANE APLANE C26 .1UF C18 .1UF 2 3 APLANE J1 .1UF 2.9mm U1 APLANE .1UF .1UF .1UF C27 C24 2.9mm APLANE RED APLANE J4 .1UF .1UF TP5 VTT C60 APLANE APLANE J3 .1UF 2.9mm C25 P5 C3 .1UF APLANE 2.9mm 8 APLANE .1UF C30 C22 C1 .1UF 1 RH HYS GND LE 13 LEB 7 14 6 LE .1UF C23 1 C64 .1UF .1UF C7 VCCI APLANE VCC_1 15 LE C2 VCC_2 16 5 VCCI C8 2 APLANE .1UF .1UF 1 C20 .1UF APLANE C16 VTP_F VTN_F MOLEX22-03-2031 3 C21 C70 .1UF C17 .1UF NOTES 1. OUTPUT SWING WILL BE APPROXIMATELY 400 mVp-p AS SEEN AT THE CONNECTOR INTO A 50 Ω LOAD. 2. 2.9mm CONNECTOR MOUNTING SCREWS WILL NEED ADHESIVE. 3. A SELECTION OF RESISTORS TO BE PROVIDED FOR POSSIBLE INSERTION INTO JP1. 4. MAKE JP1'S MOUNTING HOLES LARGE ENOUGH FOR COTO CUPS. 5. 0µA–500µA FLOATING/OPEN IS NORMAL OPERATING MODE. .1UF 05821-005 EVAL-ADCMP572/573/580/581/582 SCHEMATICS .1UF .1UF APLANE Rev. 0 | Page 12 of 20 APLANE Figure 9. Schematic, Bypass Capacitors .1UF C86 ORG 1 TP6 APLANE .1UF C43 .1UF C54 .1UF C11 .1UF C14 .1UF C13 .1UF C12 .1UF C15 10UF C19 1 .1UF C62 1 1 RED 05821-006 APLANE .1UF BLK .1UF TP3 C53 .1UF C52 .1UF C51 10UF C71 1 1 .1UF C61 .1UF C59 .1UF C58 1UF C68 10UF VCCI C85 .1UF C75 .1UF C76 .1UF VTN_F .1UF C84 APLANE .1UF C87 .1UF C74 .1UF C63 .1UF C57 .1UF C56 .1UF C55 APLANE C82 1 BLU 1UF C79 10UF C6 .1UF 1 TP13 .1UF C81 .1UF C80 1 C72 .1UF C67 .1UF C73 1UF C77 10UF C10 VEE .1UF C83 .1UF C36 .1UF C35 .1UF C33 .1UF C34 .1UF C32 1UF 1UF C78 C65 10UF C37 C66 EVAL-ADCMP572/573/580/581/582 TP7 TP9 VIO VCC0 TP2 BLK APLANE APLANE APLANE TP11 VTT_PLANE GRN APLANE TP12 BLU VTP_F APLANE TP10 BRN CGND EVAL-ADCMP572/573/580/581/582 05821-007 PC BOARD 05821-008 Figure 10. Bottom Signal Layer Figure 11. GND Plane Rev. 0 | Page 13 of 20 05821-009 EVAL-ADCMP572/573/580/581/582 05821-010 Figure 12. VCC Plane Figure 13. GND Plane Rev. 0 | Page 14 of 20 05821-011 EVAL-ADCMP572/573/580/581/582 05821-012 Figure 14. Miscellaneous DC Plane Figure 15. GND Plane Rev. 0 | Page 15 of 20 05821-013 EVAL-ADCMP572/573/580/581/582 05821-014 Figure 16. Upper Plane Figure 17. Top Rev. 0 | Page 16 of 20 05821-015 EVAL-ADCMP572/573/580/581/582 05821-016 Figure 18. Solder Mask Figure 19. Solder Mask Rev. 0 | Page 17 of 20 EVAL-ADCMP572/573/580/581/582 05821-017 SILKSCREENS 05821-018 Figure 20. Silkscreen Bottom Figure 21. Silkscreen Top Rev. 0 | Page 18 of 20 EVAL-ADCMP572/573/580/581/582 05821-019 COMPONENTS 05821-020 Figure 22 Bottom Components Figure 23. Top Components Rev. 0 | Page 19 of 20 EVAL-ADCMP572/573/580/581/582 ORDERING INFORMATION ORDERING GUIDE Model EVAL-ADCMP572BCP EVAL-ADCMP573BCP EVAL-ADCMP580BCP EVAL-ADCMP581BCP EVAL-ADCMP582BCP Package Description Evaluation Board Evaluation Board Evaluation Board Evaluation Board 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. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB05821–0–2/06(0) Rev. 0 | Page 20 of 20