Evaluation Board Manual

NBSG86ABAEVB Evaluation Board Manual for NBSG86A http://onsemi.com EVALUATION BOARD MANUAL DESCRIPTION What measurements can you expect to make? This document describes the NBSG86A evaluation board The following measurements can be performed in the and the appropriate lab test setups. It should be used in conjunction with the device data sheet, which includes single–ended (Note 1) or differential mode of operation: specifications and a full description of device operation. • Frequency Performance The board is used to evaluate the NBSG86A • Output Amplitude (VOH /VOL) GigaComm™ differential Smart Gate multi-function logic • Output Rise and Fall Time gate, which can be configured as an AND/NAND, • Output Skew OR/NOR, XOR/XNOR, or 2:1 MUX. The OLS input of the • Eye pattern generation NBSG86A is used to program the peak–to–peak output amplitude between 0 and 800 mV in five discrete steps. • Jitter The board is implemented in two layers and provides a • VIHCMR (Input High Common Mode Range) high bandwidth 50 W controlled impedance environment for higher performance. The first layer or primary trace layer is 5 mils thick Rogers RO6002 material, which is engineered to have equal electrical length on all signal traces fromwww.DataSheet4U.com the NBSG86A device to the sense output. The second layer is 32 mils thick copper ground plane. For standard lab setup and test, a split (dual) power supply is required enabling the 50 W impedance from the scope to NOTE: 1. Single- ended meas urements can only be made at be used as termination of the ECL signals, where VTT is the VCC - VEE = 3.3 V using this board setup. system ground (VCC = 2.0 V, VTT = VCC - 2.0 V and VEE is -0.5 V or -1.3 V, see Setup 1). Figure 1. NBSG86A Evaluation Board © Semiconductor Components Industries, LLC, 2003 1 March, 2003 - Rev. 0 Publication Order Number: NBSG86ABAEVB/D NBSG86ABAEVB Setup for Time Domain Measurements Table 1. Basic Equipment Needed Description Power Supply with 2 Outputs Oscilloscope Differential Signal Generator Matched High Speed Cables with SMA Connectors Power Supply Cables with Clips Example Equipment (Note 1) HP6624A TDS8000 with 80E01 Sampling Head (Note 2) HP 8133A, Advantest D3186 Storm, Semflex Qty. 1 1 1 8 3 / 4 (Note 3) 1. This equipment was used to obtain the measurements included in this document. 2. The 50 GHz sample module was used in order to obtain accurate and repeatable rise, fall, and jitter measurements. 3. Additional power supply cable with clip is needed when output level select (OLS) tested (see device data sheet). AND/NAND Function Setup OUT VTT = 0 V VCC = 2.0 V VCC Oscilloscope OUT Signal Generator OUT1 GND SEL D1 D1 Q Channel 1 OUT1 SEL Amplitude = 400 mV Offset = 660 mV TRIGGER VEE = -1.3 V (3.3 V op) OLS* or VTT = 0 V VCC = 2.0 V VEE = -0.5 V (2.5 V op) *See NBSG86A data sheet pg 2. OLS Q VEE Channel 2 D0 D0 TRIGGER Figure 2. NBSG86A Board Setup - Time Domain (AND/NAND Function) Connect Power Step 1: 1a. Connect the following supplies to the evaluation board via surface mount clips. Power Supply Summary Table 3.3 V Setup VCC = 2.0 V VTT = GND VEE = -1.3 V 2.5 V Setup VCC = 2.0 V VTT = GND VEE = -0. 5V http://onsemi.com 2 NBSG86ABAEVB AND/NAND Function Setup (continued) Connect the Inputs Step 2: For Differential Mode (3.3 V and 2.5 V operation) 2a: Connect the differential outputs of the generator to the differential inputs of the device (D1/D1 and SEL/SEL). 2b: Connect the DO input to VTT. 2c: Connect the DO input to VCC. 2d: Connect the generator trigger to the oscilloscope trigger. For Single-Ended Mode (3.3 V operation only) 2a: Connect an AC-coupled output of the generator to the desired differential input of the device. 2b: Connect the unused differential input of the device to VTT (GND) through a 50 W resistor. 2c: Connect the DO input to VTT. 2d: Connect the DO input to VCC. 2e: Connect the generator trigger to the oscilloscope trigger. All Function Setups Connect OLS (Output Level Select) to the required voltage to obtain desired output amplitude. Refer to the NBSG86A device data sheet page 2 OLS voltage table. Setup Input Signal Step 3: 3a: Set the signal generator amplitude to 400 mV. Note that the signal generator amplitude can vary from 75 mV to 900 mV to produce a 400 mV DUT output. 3b: Set the signal generator offset to 660 mV (the center of a nominal RSECL output). Note that the VIHCMR (Input High Voltage Common Mode Range) allows the signal generator offset to vary as long as VIH is within the VIHCMR range. Refer to the device data sheet for further information. 3c: Set the generator output for a square wave clock signal with a 50% duty cycle, or for a PRBS data signal. Connect Output Signals Step 4: 4a: Connect the outputs of the evaluation board (Q, Q) to the oscilloscope. The oscilloscope sampling head must have internal 50 W termination to ground. NOTE: Where a single output is being used, the unconnected output for the pair must be terminated to VTT through a 50 W resistor for best operation. Unused pairs may be left unconnected. Since VTT = 0 V, a standard 50 W SMA termination is recommended. http://onsemi.com 3 NBSG86ABAEVB OR/NOR Function Setup V = 2.0 V VTT = 0 V VTT = 0 V CC VCC = 2.0 V Oscilloscope GND Signal Generator Amplitude = 400 mV Offset = 660 mV OUT SEL Q Channel 1 D1 D1 VCC OUT SEL OUT1 OLS D0 OUT1 OLS* TRIGGER *See NBSG86A data sheet pg 2. D0 Q VEE Channel 2 VEE = -1.3 V (3.3 V op) or VEE = -0.5 V (2.5 V op) TRIGGER Figure 3. NBSG86A Board Setup - Time Domain (OR/NOR Function) Connect Power Step 1: 1a: Connect the following supplies to the evaluation board via surface mount clips. Power Supply Summary Table 3.3 V Setup VCC = 2.0 V VTT = GND VEE = -1.3 V 2.5 V Setup VCC = 2.0 V VTT = GND VEE = -0.5 V http://onsemi.com 4 NBSG86ABAEVB OR/NOR Function Setup (continued) Connect the Inputs Step 2: For Differential Mode (3.3 V and 2.5 V operation) 2a: Connect the differential outputs of the generator to the differential inputs of the device (D0/D0 and SEL/SEL). 2a: Connect the D1 input to VTT. 2b: Connect the D1 input to VCC. 2e: Connect the generator trigger to the oscilloscope trigger. For Single-Ended Mode (3.3 V operation only) 2a: Connect an AC-coupled output of the generator to the desired differential input of the device. 2b: Connect the unused differential input of the device to VTT (GND) through a 50 W resistor. 2c: Connect the D1 input to VTT. 2d: Connect the D1 input to VCC. 2e: Connect the generator trigger to the oscilloscope trigger. All Function Setups Connect OLS (Output Level Select) to the required voltage to obtain desired output amplitude. Refer to the NBSG86A device data sheet page 2 OLS voltage table. Setup Input Signal Step 3: 3a: Set the signal generator amplitude to 400 mV. Note that the signal generator amplitude can vary from 75 mV to 900 mV to produce a 400 mV DUT output. 3b: Set the signal generator offset to 660 mV (the center of a nominal RSECL output). Note that the VIHCMR (Input High Voltage Common Mode Range) allows the signal generator offset to vary as long as VIH is within the VIHCMR range. Refer to the device data sheet for further information. 3c: Set the generator output for a square wave clock signal with a 50% duty cycle, or for a PRBS data signal. Connect Output Signals Step 4: 4a: Connect the outputs of the evaluation board (Q, Q) to the oscilloscope. The oscilloscope sampling head must have internal 50 W termination to ground. NOTE: Where a single output is being used, the unconnected output for the pair must be terminated to VTT through a 50 W resistor for best operation. Unused pairs may be left unconnected. Since VTT = 0 V, a standard 50 W SMA termination is recommended. http://onsemi.com 5 NBSG86ABAEVB XOR/XNOR Function Setup OUT1 VTT = 0 V VCC = 2.0 V Oscilloscope OUT1 Signal Generator Amplitude = 400 mV OUT Offset = 660 mV OUT OUT1 GND D1 D1 VCC SEL Q Channel 1 SEL OLS Q VEE Channel 2 D0 D0 OUT1 TRIGGER OLS* VEE = -1.3 V (3.3 V op) or VEE = -0.5 V (2.5 V op) TRIGGER *See NBSG86A data sheet pg 2. Figure 4. NBSG86A Board Setup - Time Domain (XOR/XNOR Function) Connect Power Step 1: 1a: Connect the following supplies to the evaluation board via surface mount clips. Power Supply Summary Table 3.3 V Setup VCC = 2.0 V VTT = GND VEE = -1.3 V 2.5 V Setup VCC = 2.0 V VTT = GND VEE = -0.5 V http://onsemi.com 6 NBSG86ABAEVB XOR/XNOR Function Setup (continued) Connect the Inputs Step 2: For Differential Mode (3.3 V and 2.5 V operation) 2a: Connect the differential outputs of the generator to the differential inputs of the device (OUT OUT to SEL/SEL; OUT1/OUT1 to DO&D1/D0&D1 respectively). Step 2e: Connect the generator trigger to the oscilloscope trigger. For Single-Ended Mode (3.3 V operation only) 2a: Connect an AC-coupled output of the generator to the desired differential input of the device. 2b: Connect the unused differential input of the device to VTT (GND) through a 50 W resistor. 2e: Connect the generator trigger to the oscilloscope trigger. All Function Setups Connect OLS (Output Level Select) to the required voltage to obtain desired output amplitude. Refer to the NBSG86A device data sheet page 2 OLS voltage table. Setup Input Signal Step 3: 3a: Set the signal generator amplitude to 400 mV. Note that the signal generator amplitude can vary from 75 mV to 900 mV to produce a 400 mV DUT output. 3b: Set the signal generator offset to 660 mV (the center of a nominal RSECL output). Note that the VIHCMR (Input High Voltage Common Mode Range) allows the signal generator offset to vary as long as VIH is within the VIHCMR range. Refer to the device data sheet for further information. 3c: Set the generator output for a square wave clock signal with a 50% duty cycle, or for a PRBS data signal. Connect Output Signals Step 4: 4a: Connect the outputs of the evaluation board (Q, Q) to the oscilloscope. The oscilloscope sampl