19-1669; Rev 0; 4/00 MAX5183 Evaluation Kit Features ♦ Fast Evaluation and Performance Testing ♦ SMA Coaxial Connectors for Clock and Data Inputs ♦ Performance-Optimized Four-Layer PC Board with Separate Analog and Digital Power and Ground Connections ♦ On-Board Differential to Single-Ended Conversion Circuitry ♦ Fully Assembled and Tested with MAX5183BEEI Ordering Information PART TEMP. RANGE MAX5183EVKIT 0°C to +70°C IC PACKAGE 28 QSOP Component List DESIGNATION QTY C1, C4, C8, C10, C12, C14, C18, C21, C23, C25 10 C2, C3, C6, C7, C9, C11, C13, C16, C17, C19, C20, C22, C24 13 DESCRIPTION 0.1µF, 10V ceramic capacitors C5, C15 0 R1–R10, R13, R14 12 49.9Ω ±1% resistors R11, R12, R30, R44 4 100Ω ±1% resistors R15, R45 2 200Ω ±1% resistors R16–R25, R28, R29, R35, R36, R41, R42, R43 0 Not installed, optional termination resistors for shunt configuration R26, R27, R31, R39 4 4 24Ω, ±5% resistors 402Ω ±1% resistors (Note: Install to evaluate the current-output DACs MAX5180, MAX5182, MAX5186, and MAX5188.) DESCRIPTION R43 0 10kΩ ±1% resistor, not supplied (Note: Install to evaluate the currentoutput DACs MAX5180, MAX5182, MAX5186, and MAX5188.) JU1–JU7 7 3-pin headers D0–D9, CLK, CS 12 Female SMA connectors L1 1 Ferrite bead Panasonic EXC-CL3216U1 OUT1P, OUT1N, OUT2P, OUT2N, REFO, AVDD, AGND, DVDD, DGND, VCC, VEE 11 Test points U1 1 Maxim MAX5183BEEI dual DAC U2, U3 U4, U5 4 Maxim MAX4108ESA low-distortion amplifiers None 1 PC board None 1 MAX5183 data sheet 10µF, 16V tantalum capacitors 2pF ceramic capacitors, optional output bandwidth-limiting capacitors (not supplied) R35, R36, R41, R42 DESIGNATION QTY None 1 MAX5183 EV kit data sheet T1, T2 2 Baluns, Coilcraft TTWB1010-1 VOUT1, VOUT2 2 Scope-probe jacks ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Evaluates: MAX5180/82/83/85/86/88/89/91 General Description The MAX5183 evaluation kit (EV kit) is designed to simplify evaluation of the 8-bit and 10-bit, dual, 40MHz, simultaneous-update or alternate-phase-update MAX5180/MAX5183, MAX5182/MAX5185, MAX5186/ MAX5189, and MAX5188/MAX5191 digital-to-analog converters (DACs). The board contains all circuitry necessary for evaluating the dynamic performance of these high-speed converters, including a circuit to convert the DAC’s differential outputs into single-ended outputs. Since the design combines high-speed analog and digital circuitry, the board layout calls for special precautions and design features. Connector pads for power supplies (AVDD, DVDD, VCC, and VEE), DAC and amplifier outputs (OUT1P, OUT1N, VOUT1, OUT2P, OUT2N, and VOUT2), and SMA connectors for the digital and control inputs (D0–D9, CS, CLK) simplify connection to the EV kit. The four-layer board layout is optimized for best dynamic performance. The MAX5183 dual, 10-bit, 40MHz, simultaneousupdate DAC is installed on the EV kit board. The kit can be used to evaluate the MAX5180, MAX5182, MAX5185, MAX5186, MAX5188, MAX5189, or MAX5191 with minor component changes. Evaluates: MAX5180/82/83/85/86/88/89/91 MAX5183 Evaluation Kit Quick Reference The EV kit is delivered fully assembled, tested, and sealed in an antistatic bag. To ensure proper operation, open the antistatic bag only at a static-safe work area and follow the instructions listed below. Do not turn on the power supplies until all power connections to the EV kit are established. Figure 1 shows a typical evaluation setup for single-ended output operation: 1) Connect a -5V power supply to the pad marked VEE. Connect the supply’s ground to the AGND pad. This negative supply for the MAX4108 amplifiers may also be connected to ground for singlesupply operation. 2) Connect a +3V power supply to the pad marked AVDD. Connect the supply’s ground to the pad marked AGND. 3) Connect a +5V power supply to the pad marked VCC. Connect the supply’s ground to the pad marked AGND. 4) Connect a +3V power supply to the pad marked DVDD. Connect the supply’s ground to the pad marked DGND. DAC Differential Outputs The MAX5180/MAX5182/MAX5186/MAX5188 currentoutput DACs are designed to supply full-scale output currents of 1mA into 400Ω loads, in parallel with a capacitive load of 5pF. The MAX5183/MAX5185/ MAX5189/MAX5191 voltage-output DACs have on-chip 400Ω resistors that restore the array currents to proportional, differential voltages of ±400mV full scale. These differential output voltages are then used to drive a balun transformer or a low-distortion, high-speed operational amplifier (such as the MAX4108 devices and transformers supplied in the EV kit, Figure 2) to convert the differential voltage into a single-ended voltage. Alternately, outputs may be derived directly from the amplifier outputs or the DAC outputs (Tables 3, 4). The MAX5183 EV kit is shipped with the necessary external circuitry to operate the installed MAX5183 voltage-output DAC. The full-scale output current-set resistor (R43) and the 402Ω conversion resistors (R35, R36, R41, R42) are not required for any of the voltage-output DACs and are therefore not installed on the MAX5183 EV kit. 5) Connect a word or pattern generator (e.g., Tektronix/Sony DG2020A) with the digitized pattern of a sinusoidal input signal to the digital data and control inputs (D0–D9, DACEN, REN, PD, and CS). 6) Connect an appropriate low-phase-noise clock signal generator (e.g., HP 8662A) to the clock input pin (CLK) of the DAC. 7) Connect the inputs of a four-channel digital oscilloscope (e.g., Tektronix TDS648B) to the outputs of OUT1P, OUT1N, OUT2P, and OUT2N, or connect two input channels to the pads marked VOUT1 and VOUT2 to observe the reconstructed output waveforms. AVDD fCLK = 40MHz CLK HP 8662A CLOCK SOURCE SYNC DG2020 CS CONTROL SIGNAL PATTERN/WORD DIGITAL GENERATOR INPUTS D0–D7*/D0–D9** AGND MAX5183 VEE EV Kit DGND DVDD 8) Ensure jumpers JU1–JU7 are configured to the default settings as shown in Tables 1–4. Tables 1 and 2 are for jumpers 1-3 only. 9) Turn on the supplies and signal sources. VCC +3V ANALOG SUPPLY +5V ANALOG SUPPLY ANALOG GROUND -5V ANALOG SUPPLY POWER SUPPLIES DIGITAL GROUND +3V DIGITAL SUPPLY VOUT1 VOUT2 DIGITAL SCOPE Detailed Description Digital Inputs The MAX5183 EV kit board includes high-frequency SMA connectors for the digital data, clock, and controlline inputs (D0–D9, CS, CLK). Each of these matchedimpedance signal lines provides on-board series 50Ω termination resistors located in the signal path of the digital inputs to DGND. Optionally, 50Ω termination resistors to DGND may be user installed. 2 *APPLIES TO 8-BIT VERSIONS: MAX5186/MAX5188/MAX5189/MAX5191. **APPLIES TO 10-BIT VERSIONS: MAX5180/MAX5182/MAX5183/MAX5185. Figure 1. Typical EV Kit Test Setup for Single-Ended Operation _______________________________________________________________________________________ MAX5183 Evaluation Kit Standby Mode To place the DAC in standby mode (Table 2), connect digital inputs PD and DACEN to DGND by setting jumpers JU2 and JU3 to locations 2-3. In standby, both the reference and the control amplifier are active, with the current array inactive. To exit this condition, pull DACEN high with PD held at DGND by leaving jumper JU3 in location 2-3 and changing jumper JU2 to location 1-2. Shutdown Mode For lowest power consumption, the MAX5183 EV kit provides a shutdown mode (Table 2) in which the reference, control amplifier, and current array are inactive and the converter’s supply current is reduced to 1µA. To enter this mode, connect PD to DVDD by changing jumper JU3 to location 1-2. To return to active mode, connect PD to DGND by changing jumper JU3 to location 2-3, and connect DACEN to DVDD by changing jumper JU2 to location 1-2. Power Supplies The EV kit features separate analog and digital power and ground connections for best dynamic performance. It is not necessary to connect the analog and digital grounds together externally. The two grounds are connected together at a single point on the MAX5183 EV kit (at ferrite bead L1). The power-supply connectors are located at the top of the board. Table 1. Selecting Reference Mode REN JUMPER (JU1) POSITION REFERENCE MODE 1-2 Connect external precision reference at REFO. 2-3* Internal +1.2V bandgap reference active *Indicates default jumper state Table 2. Selecting Power-Down Mode PD JUMPER (JU3) POSITION DACEN JUMPER (JU2) POSITION POWER-DOWN MODE 1-2 X Shutdown 2-3 2-3 Standby 2-3* 1-2* Normal operation X = Don’t care *Indicates default jumper state Table 3. Alternate Output Drive (OUT1N, OUT1P) Selection JU4 POSITION JU5 POSITION 1-2 1-2 2-3 2-3 Buffered outputs from amplifier MAX4108 (U2, U4) Table 4. Alternate Output Drive (OUT2N, OUT2P) Selection JU6 POSITION JU7 POSITION Evaluating the MAX518x Family The MAX5183 EV kit may be used to evaluate other MAX518x family 8-bit and 10-bit dual DACs. The changes required for this are listed in Table 5. When evaluating the MAX5186/MAX5189 (dual, 8-bit DACs with simultaneous update) and the MAX5188/ MAX5191 (dual, 8-bit DACs with alternate-phase update), input data bits D0 and D1 must be connected to DGND to ensure proper operation. OUT1N, OUT1P PADS Direct DAC outputs for voltage-output MAX5183 (U1) OUT2N, OUT2P PADS 1-2 1-2 Direct DAC outputs for voltage-output MAX5183 (U1) 2-3 2-3 Buffered outputs from amplifier MAX4108 (U3, U5) _______________________________________________________________________________________ 3 Evaluates: MAX5180/82/83/85/86/88/89/91 DAC Reference Options The MAX5183 family features an on-chip +1.2V precision bandgap reference, which can be activated by connecting the reference enable pin REN to DGND. For this purpose, jumper JU1 must remain in location 2-3 (Table 1), which is the default location used when the board is shipped. To disable the internal reference, connect REN to DVDD by placing jumper JU1 in location 1-2. A temperaturestable external reference may now be applied at the REFO pad to set the full-scale current/voltage output. Evaluates: MAX5180/82/83/85/86/88/89/91 MAX5183 Evaluation Kit Board Layout The EV kit is a 4-layer board design (Table 6), optimized for high-speed signals. The EV kit board uses FR4 epoxy dielectric material with a relative dielectric constant of ε r = 4.2 to 4.9. A proper FR4 design requires 14mils foil thickness for each 1oz copper layer and 0.1mm dielectric thickness between the layers. All high-speed signals are routed through 50Ω impedance-matched transmission lines. The line width for these signal lines is 14mils, with a ground plane height of 8mils. The MAX5183 EV kit has a total board thickness of 0.062in (1.57mm), using four copper layers. The board layout separates the analog and digital portions of the circuit. Matched 50Ω impedance transmission lines are used for all high-speed digital inputs. The digital inputs are arranged in a half circle to match the line lengths between DAC inputs and the pattern and clock generators’ SMA connectors. The lengths of these 50Ω transmission lines are matched to within 50mils to minimize layout-dependent data skew. Wherever large ground planes are used, care is taken to ensure that the analog planes do not overlap with any digital planes. This eliminates the possibility of capacitively coupling digital noise through the circuit board to sensitive analog areas. 4 Table 5. Evaluating All Dual, 8-Bit/10-Bit DACs in the MAX518x Family DEVICE INSTALLED ON THE EV KIT R35, R36, R41, R42, R43 MAX5180 Installed MAX5182 Installed MAX5183* Not installed MAX5185 Not installed MAX5186 Installed MAX5188 Installed MAX5189 Not installed MAX5191 Not installed *As shipped Table 6. EV Kit PC Board Layers LAYER DESCRIPTION Layer I, Top Components, jumpers, SMA connectors, digital 50Ω microstrip lines, 50Ω termination resistors, DVDD, VCC Layer II, Digital Ground Plane Digital ground, DGND Layer III, Analog Ground Plane Analog ground, AGND Layer IV, Bottom Components, 50Ω termination resistors, AVDD, VEE _______________________________________________________________________________________ _______________________________________________________________________________________ JU2 3 1 2 DVDD VOUT1 SCOPE JACK R15 200Ω T1 DVDD 4 6 1 2 DVDD 3 1 2 R12 100Ω R11 100Ω JU1 3 JU3 3 1 COILCRAFT TTWB1010-1 TYPE A D1 CS R26 24Ω D2 D0 CLK C21, 10µF C20, 0.1µF C19 0.1µF C18 10µF 6 5 R1 49.9Ω 2 VEE VEE R18 OPEN R2 49.9Ω R14 49.9Ω 2 3 VEE 4 U2 3 R3 49.9Ω 7 U4 5 R13 49.9Ω 8 6 C4 10µF C3 0.1µF 8 7 C2 0.1µF R31 24Ω R17 OPEN VCC VCC R16 OPEN OUT1P JU5 3 2 1 R36 OPEN R35 OPEN JU4 R29 OPEN C5 OPEN 3 2 1 R28 OPEN OUT1N 6 DACEN 3 OUT1N 2 OUT1P AGND 14 D2 13 D1 12 D0 L1 DGND D3 15 D4 16 D5 17 D6 18 D7 19 D8 20 D9 21 REFR 24 REFO 25 OUT2N 26 OUT2P 27 CREF2 28 AGND DGND 23 4 11 REN 10 N.C. 9 CLK 8 CS 7 PD 22 DVDD C9 0.1µF R43 OPEN AVDD C16 0.1µF DVDD C10 10µF DVDD MAX5183 5 AVDD 1 CREF1 C6 0.1µF AVDD C7 0.1µF C8 10µF AVDD AVDD R25 OPEN JU7 R42 OPEN OUT2P R22 OPEN REFO R41 OPEN JU6 R23 OPEN C15 OPEN 1 3 2 3 1 2 R24 OPEN C17 0.1µF OUT2N R21 OPEN R20 OPEN 2 3 VEE 4 U3 7 C12 10µF R5 49.9Ω R7 49.9Ω R9 49.9Ω R27 24Ω 7 R4 49.9Ω R6 49.9Ω R8 49.9Ω R10 49.9Ω C25 10µF C22 6 0.1µF 8 C24 0.1µF C14 10µF C23 10µF C11 0.1µF 8 6 C13 5 0.1µF U5 R19 OPEN VCC VEE 3 2 VCC R39 24Ω D3 D5 D7 D9 D4 D6 D8 R44 100Ω R30 100Ω 3 4 R45 200Ω COILCRAFT TTWB1010-1 TYPE A 1 T2 6 SCOPE JACK VOUT2 Evaluates: MAX5180/82/83/85/86/88/89/91 C1 10µF VCC MAX5183 Evaluation Kit Figure 2. MAX5183 EV Kit Schematic 5 Evaluates: MAX5180/82/83/85/86/88/89/91 MAX5183 Evaluation Kit 1.0" Figure 3. MAX5183 EV Kit Component Placement Guide— Component Side 1.0" Figure 5. MAX5183 EV Kit PC Board Layout—Component Side (Layer I) 6 1.0" Figure 4. MAX5183 EV Kit Component Placement Guide— Solder Side 1.0" Figure 6. MAX5183 EV Kit PC Board Layout—DGND Plane (Layer II) _______________________________________________________________________________________ MAX5183 Evaluation Kit Evaluates: MAX5180/82/83/85/86/88/89/91 1.0" 1.0" Figure 7. MAX5183 EV Kit PC Board Layout—AGND Plane (Layer III) Figure 8. MAX5183 EV Kit PC Board Layout—Solder Side (Layer IV) _______________________________________________________________________________________ 7 Evaluates: MAX5180/82/83/85/86/88/89/91 MAX5183 Evaluation Kit NOTES Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.