AD5162EVAL

256-Position SPI Compatible Dual Digital Potentiometer AD5162 Evaluation Board User Manual 5 Steps To Setup The Evaluation Board… 1. Install AD5162 Software 3. Open AD5162 RevA.exe 4. Provide Power SupplyOr Use Power from Parallel Port +5V GND W 2. Configure Board and Connect to Parallel Port with Provided Parallel Cable B 5. Measure Result Figure 1. Evaluation Kit Setup No Programming Skills Required! Rev B 11/03/03 1 256-Position SPI Compatible Dual Digital Potentiometer AD5162 Evaluation Board User Manual General Overview This evaluation board provides the user with a simple and quick solution to evaluate digital potentiometers from Analog Devices. Only one digital pot can be placed on the board at a time. For the user’s convenience, a general purpose opamp, 2.5V voltage reference, and two power MOSFETs are included and can be configured in a variety of flexible configurations. The digital pot can be used by itself or in conjunction with these other components. How to Get Started 1. Click on the Install Software link in the Digital POT CD browser or setup.exe if you don’t have the CD browser. 2. Configure board to your liking(refer to “Configuring Other Components” on page 4 for more details). A two channel opamp(AD822B), 2.5V reference(ADR03), and two power mosfets(FDV301N) are provided for your convenience. If you would simply like to evaluate the digital pot, then ignore Step 2 and proceed to Step 3. 3. Apply a separate power supply or use power from the parallel port(refer to “Powering the AD5162” on page 4 to avoid damaging the part). 4. Connect board to parallel port with provided parallel cable. 5. Open the AD5162 Rev A program from the Windows Start – Program. Move scroll bar to program resistance settings. The operation is self-explanatory. Figure 2. AD5162 Software Graphic al Interface Rev B 11/03/03 2 256-Position SPI Compatible Dual Digital Potentiometer AD5162 Evaluation Board User Manual 1 2 3 U5 U12 ADR03 2.5V Reference 1 2 3 VDD C2 5 Temp Trim GND Vin Vout 4 AGND C 8 A1 7 B1 6 CS/AD0 5 SDI/SDA A B CS SDI A1 1 2 B1 CS/AD0 3 SDO 4 SDI/SDA5 A B CS/AD0 SDO/NC SDI/SDA VDD 1 DGND 2 CLK/SCL 3 VDD GND SCL 6 B1 5 W1 4 SDI/SDA B W SDA W1 1 VDD 2 DGND 3 CLK/SCL 4 W VDD GND SCL A B AD0 SDA 8 A1 7 B1 6 CS/AD0 5 SDI/SDA AD5245 SDO 1 U14 B1 1 A1 A1 2 W1 W1 3 B3 B3 4 A3 A3 5 W3 W3 6 VDD 7 DGND 8 10 W1 9 B2 8 RES/AD1 7 SDI/SDA 6 CLK/SCL W1 B2 AD1 SDA SCL W1 10 9 VDD 8 DIS 7 DGND 6 CLK/SCL W VDD SPI/I2C GND CLK/SCL A1 2 W1 3 B1 4 24 B2 B2 VDD 5 23 A2 A2 SHDN 6 22 W2 W2 CLK/SCL 7 21 B4 B4 SDI/SDA 8 20 A4 A4 19 W4 W4 U2 U1 JP4 B1 AD0 W2 GND VDD U6 AD5246 B1 AD5243 B1 1 CS/AD0 2 W2 3 DGND 4 VDD 5 W VDD GND CLK AD5161 10W1 9 B2 8 A2 7 SDI/SDA 6 CLK/SCL W1 B2 A2 SDA SCL W1 1 VDD 2 DGND 3 CLK/SCL 4 AD5160 JP5 B1 A1 W2 GND VDD U9 U7 6 A1 5 W1 4 SDI/SDA A W SDA U8 U10 1 2 3 4 5 VDD GND SCL C3 0.1u D B1 A1 W2 DGND VDD VDD 1 DGND 2 CLK/SCL 3 AD5247 ADR03 0.1u VREF 5 4 AD5248 DIS 9 VL 10 SDI/SDA 11 VDD CLK/SCL 12 VDD B1 B2 A1 A2 W1 W2 B3 B4 A3 A4 W3 W4 VDD VSS GND NC/O2 DIS SDO/O1 VLOGIC SHDN SDI/SDA RESB/AD1 CLK/SCL CS/AD0 O1 A2 A1 W2 W1 B2 B1 VL VDD VSS SHDN GND SCL AD1 SDA AD0 16 A2 15 W2 14 B2 13 VL 12 VSS 11 DGND 10 RES/AD1 9 CS/AD0 AD5282 JP2 18 VSS 17 NC/O2 O2 16 SDO C16 C17 0.1u 10u JP3 B1 A1 W2 DGND VDD VSS 1 2 3 4 5 15 SHDN U11 B1 A1 W2 GND VDD W1 B2 CS SDI CLK 10W1 9 B2 8 CS/AD0 7 SDI/SDA 6 CLK/SCL AD5162 14 RES/AD1 13 CS/AD0 OUT1 1 -IN1 2 U13 OUT1 V+ 8 V+ 7 OUT2 6 -IN2 5 +IN2 AD5263 -IN1 OUT2 U3A JP1 +IN1 3 V- 4 +IN1 J1 13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1 B DGNDPAD DGND C1 10u R10 10k R11 10k R12 10k R13 10k R14 10k R15 10k R16 10k U3 SDO 1 A1 2 W1 3 B1 4 100 VDD 5 100 SHDN 6 SDO/O1 470 R8 R6 R5 R4 R3 R2 R1 U3B +IN2 AD822 R9 R7 V- -IN2 AD822 Dual Opamp SHDN DIS FDV301N Power FETs CLK/SCL 7 100 RES/AD1 100 D1 SDI/SDA 8 D2 CS/AD0 W2 W1 B1 VDD SHDN B2 VL VSS GND CLK PR SDI CS 16 A2 15 W2 14 B2 13 VL 12 VSS 11 DGND 10 VDD 9 CS/AD0 CLK/SCL 100 220 220 SDI/SDA VDD W1 CP15 CP17 Q1 FDV301 W2 JP14 JP15 Q2 FDV301 A CP16 C5 0.1u A2 A1 AD5262 100 DB25 C4 0.1u SDO C6 0.1u C7 0.1u C8 0.1u C9 0.1u C10 0.1u C11 0.1u C12 0.1u C13 0.1u C14 0.1u CP18 SDO 1 A1 2 W1 3 B1 4 VDD 5 SHDN 6 CLK/SCL 7 C15 0.1u SDI/SDA 8 U4 O1 A2 A1 W2 W1 B1 VDD B2 O2 VSS SHDN GND SCL AD1 SDA AD0 16 A2 15 W2 14 B2 13 NC/O2 12 VSS 11 DGND 10 RES/AD1 9 CS/AD0 AD5242 1 2 3 Figure 3. Evaluation Board Schematic Rev B 11/03/03 3 4 5 256-Position SPI Compatible Dual Digital Potentiometer AD5162 Evaluation Board User Manual JP7 VCC JP6 VDD C18 0.1u V+ C19 10u CP8 CP1 CP3 -IN1 CP2 JP10 Vin1 2 CP4 JP13 U3A +IN13 1 +IN25 OUT1 4 CP6 CP11 6 JP12 Vin2 8 JP11 CP10 -IN2 CP9 7 U3B OUT2 CP13 CP14 CP12 CP7 CP5 VJP8 JP9 C20 C21 0.1u 10u VEE Opamp configuration Figure 4. Detailed Opamp Connections Powering the AD5162: Two Options for Powering I. Using the power from the parallel port as VDD Simply connect JP1. The voltage level will be whatever your parallel port operates at. II. Using a separate supply DO NOT connect JP1. Connect voltage supply power and ground to the VDD and GND pads on the board. Configuring other Components Two Channel Opamp - AD822 Positive Supply To use the same VDD as the AD5162, connect JP6. To use a separate positive supply, connect JP7 and apply positive supply(no more than +15V) to the VCC pad. Negative Supply To use GND, simply connect JP8. To use a negative supply, connect JP9 and apply negative supply to VEE pad. For more details on connecters and jumpers around the opamp, refer to Figure 4. Rev B 11/03/03 4 256-Position SPI Compatible Dual Digital Potentiometer AD5162 Evaluation Board User Manual 2.5V Voltage Reference – ADR03 By connecting JP5, the voltage reference is connected to the A-terminal of channel-1 of the AD5162. You don’t need to worry about applying VDD because it is hardwired from the same source that is powering the AD5162. Power Mosfets – FDV301N Q1 By connecting JP14, the wiper of channel-1 is connected to the gate of Q1. CP15 can be used to place a resistor between the drain and pad D1. CP16 can be used to place a degenerative resistor between the source and GND. Q2 By connecting JP15, the wiper of channel-2 is connected to the gate of Q2. CP17 can be used to place a resistor between the drain and pad D2. CP18 can be used to place a degenerative resistor between the source and GND. Rev B 11/03/03 5 256-Position SPI Compatible Dual Digital Potentiometer AD5162 Evaluation Board User Manual AD5162 Parallel Port Connection (Information for Visual Basic Program Developers Only) SHDN VDD DIS RES/AD1 CS/AD0 CLK/SCL SDI/SDA DGND SDO/O1 SDA_Read http://www.doc.ic.ac.uk/~ih/doc/par/ 8 output pins accessed via the DATA Port 5 input pins (one inverted) accessed via the STATUS Port 4 output pins (three inverted) accessed via the CONTROL Port The remaining 8 pins are grounded portID = Val("&H" + "378") [378h = 888] portID = Val("&H" + "379") [379h = 889] portID = Val("&H" + "37A") [37Ah = 890] TIMING DEFINATION IN VISUAL BASIC SOURCE CODE cmdRUN bit 2 (Pin 4) bit 1 (Pin 3) bit 0 (Pin 2) /CS CLK SDI Binary Code 1100 1001 1011 1000 1010 Decimal Code 12 No Activity Rev B 11/03/03 9 11 8 10 1100 12 Send out BIT_TOGO=0 6 Latch Data