DEM-ADS7806/07C EVALUATION FIXTURE FPO FEATURES DESCRIPTION ● 40kHz 12-BIT ADS7806P AND 16-BIT ADS7807P INCLUDED The DEM-ADS7806/07C Evaluation Fixture is a fully assembled printed circuit board intended to evaluate the ADS7806P and ADS7807P. This device incorporates an analog input amplifier (with provisions to bypass this amplifier), a parallel digital output buffer, a crystal oscillator based 40kHz convert command generator, an external convert command connector, and a 2.3" x 1.2" breadboard area. The DEM-ADS7806/ 07C achieves full converter performance on a two layer board. ● 16-BIT BUFFERED PARALLEL OUTPUT ● CONNECTOR FOR ALL DIGITAL I/O PINS ● CRYSTAL OSCILLATOR BASED 40kHZ CONVERT COMMAND GENERATOR ● EXTERNAL CONVERT COMMAND CONNECTOR ● PROTOTYPE AREA APPLICATIONS This fixture requires only a single +5V power supply. An optional bipolar power supply connector is provided for the input buffer and breadboarding. ● EVALUATE ADS7806P AND ADS7807P PERFORMANCE ● BREADBOARD COMPLETE ANALOG SYSTEM ● EVALUATE SIMPLE TWO LAYER PCB LAYOUT ● INCOMING INSPECTION TEST FIXTURE International Airport Industrial Park • Mailing Address: PO Box 11400 Tel: (602) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • © 1993 Burr-Brown Corporation • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706 Telex: 066-6491 • FAX: (602) 889-1510 • Immediate Product Info: (800) 548-6132 LI-447A Printed in U.S.A. April, 1994 TABLE OF CONTENTS How to Use This Manual ............................................................................................................................ 2 PCB Legend ................................................................................................................................................ 3 Factory Settings ....................................................................................................................................... 3-5 Step-By-Step Basic Operations .................................................................................................................. 6 Device .................................................................................................................................................. 6 Input Amplifier .................................................................................................................................... 6 Offset/Gain Adjust ............................................................................................................................... 6 Convert Command Generator .............................................................................................................. 6 Output Format...................................................................................................................................... 7 Power Supplies .................................................................................................................................... 7 Other Options ...................................................................................................................................... 7 Pin Out for Output Connectors ................................................................................................................... 7 Wiring Diagram .......................................................................................................................................... 8 PCB Component Side ............................................................................................................................... 10 PCB Solder Side ....................................................................................................................................... 11 Installed Component List.......................................................................................................................... 12 Packing List .............................................................................................................................................. 12 HOW TO USE THIS MANUAL A table and diagrams are included in the “Factory Settings” section showing how the board is configured from the factory. A listing of other components, which are shipped with the board, is also included. The Step-by-Step Basic Operations section describes all of the options. At the end of each step, a figure illustrates factory settings. Items installed are highlighted in these figures. For further details on the OPA604, ADS7806P, ADS7807P or any other device on the DEM-ADS7806/07C, refer to the product data sheet for that device. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® DEM-ADS7806/07C 2 GND FIGURE 1. PCB Legend. FACTORY SETTINGS With a +5V supply connected to P2, the DEM-ADS7806/ 07C starts converting at 40kHz and is set for an input range of ±10V. Byte-reading parallel or serial output can be read MAKE SELECTION FOR EACH STEP(1) FACTORY SETTINGS on P5, and buffered full-parallel output on P6. The following is a listing of “factory settings”. OTHER OPTIONS (requires alteration of the demo board, all needed components included.) 1. Device ADS7807P installed. ADS7806P included for installation. Switch jumper J4 and J5 to “06”. 2. Input Amplifier OPA604 bypassed. Switching jumpers on J1 and J2 to “B” selects input amplifier. Apply ±15V to P1. 3. Input Range ±10V 0V-5V and 0V-4V. Offset Adjust Trim circuit not installed. Trim circuit resistors and potentiometer included for installation. See Step-by-Step Basic Operations, Step 3. Gain Adjust Trim circuit not installed. Trim circuit resistors and potentiometer included for installation, See Step-by-Step Basic Operations, Step 3. On-board 40kHz convert command generator connected to R/C. Apply external convert command generator, (≤40kHz) to P4 and switch J6 to “EXT”. 4. Convert Command 5. Binary Format Binary Two’s Complement Removing the jumper from pin 1 to pin 2 of P5 selects Straight Binary format. 6. Output Format 12/16-bit Buffered Full Parallel Output (P6) 12/16-bit Serial Output (P5) 8-bit Byte-Reading Output (P5) 7. Power Supplies 2-pin Power Block (P2) ready for +5V. 3-pin Power Block (P1) ready for ±15V (for use with breadboard and optional input amplifier). NOTE: (1) Each of these steps is explained in the Step-by-Step Basic Operations Section. TABLE I. Quick Reference to Factory Settings and Other Options. ® 3 DEM-ADS7806/07C FACTORY SETTINGS (CONT) Hardware P1 Installed Comments Yes 3-pin Power Block BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD –V GND +V P1 P2 Yes 2-pin Power Block P3 Yes PCB Mount BNC Connector P3 GND +5 P2 POWER OPTIONAL POWER PIN 1 P4 P5 PCB Mount BNC Connector Yes 20 X 2 Header P6 Yes 20 X 2 Shrouded Header U1 Yes 28-pin Socket for U2 Yes 8-pin Socket for OPA604 J1-6 Yes 3x1 Headers J7 No Refer to Step-by-Step Basic Operations, Step 4B ANALOG INPUT +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 EXT B B A A U2 J1 J2 EXT DIGITAL I/O GND Yes P5 J3 P4 INT DATA CLK SELECT ADS7806P or ADS7807P U1 J4 J5 06 06 07 07 DEVICE SELECT 2 P6 INT CONVERT COMMAND SELECT 40 J7 1 39 PARALLEL OUTPUT J7 is not included FIGURE 2. Hardware Installed. Jumpers for: Setting J1, J2 “A” Comments U2 (Input Amplifier Socket) bypassed J3 “INT” Internal Data Clock Selected J4, J5 “07” Set for ADS7807P Operation BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD P5 B B Crystal On-Board Convert Command Generator Selected (Outputs 40kHz to R/C) A J1 J2 EXT J3 “INT” DIGITAL I/O GND A J6 INT DATA CLK SELECT P5 Pin 33 to 34 PWRD Tied LOW P5 Pin 29 to 30 CS Tied LOW P5 Pin 25 to 26 BYTE Tied LOW 06 SB/BTC Tied LOW 07 07 DEVICE SELECT P5 Pin 1 to 2 J4 +5 +5 REFD PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 J5 06 EXT INT CONVERT COMMAND SELECT J7 J7 not included FIGURE 3. Jumpers Installed. ® DEM-ADS7806/07C 4 FACTORY SETTINGS (CONT) ICs Installed Comments ADS7806P No Included in Package ADS7807P Yes Plugged into 28-pin Socket (U1) OPA604 Yes Plugged into 8-pin Socket (U2) U3, U4 Yes 4-bit Shift Register U5 Yes Hex Schmit Inverter U6 Yes 8-bit Shift Register U7 Yes 8-bit Latch U8 Yes Dual Decade Counter U9 Yes 4.000MHz Crystal Oscillator BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD U2 U1 U3 U4 U5 U6 U8 U7 U9 FIGURE 4. ICs Installed. Potentiometers Installed Comments 200Ω 1/4W 1%(1) 100Ω 1/4W 1%(1) 33.2kΩ 1/4W 1%(1) 1MΩ 1/4W 1%(1) 49.9Ω 1/4W 1%(1) 200Ω 1/4W 1% 100Ω 1/4W 1% 66.5kΩ 1/4W 1% 10kΩ 1/4W 1% 49.9Ω 1/4W 1% R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R14 R12 R13 R11 C2 C1 C5 C6 Comments 50kΩ 1/4"(1) RV1 - RV3 No Capacitors Installed Comments Yes Yes Yes 0.1µF (50V) 2.2µF (25V) 10µF (10V) C1, C2, C6 - 13 C3, C4 C5 BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD R15 R16 No No No No No Yes Yes Yes Yes Yes C3 Installed R1 R5 R2, R4, R6 R9 R11 R3 R7 R8 R10, R12-15,R17 R16 C4 Resistors C7 C8 C10 C11 C9 NOTE: (1) Included in Package. R17 C12 C13 FIGURE 5. Resistors and Capacitors Installed. ® 5 DEM-ADS7806/07C STEP-BY-STEP BASIC OPERATIONS Step 3 — Input Range, Offset/Gain Adjust Input Range A) Using Table II, choose the input voltage range for your application. Note that using the optional input amplifier will directly affect the input voltage seen at the converter input (factory setting for the gain of the amplifier is –2V/V). Install the proper resistors. Step 1 — ADS7806P or ADS7807P A) To test the ADS7806P, set jumpers J4 and J5 to the “06” position and install an ADS7806P into U1. B) To test the ADS7807P, set jumpers J4 and J5 to the “07” position and install an ADS7807P into U1. Offset Adjust Factory Setting: J4 and J5 set to “07”, C3, C4, C5, C6 and 28-pin socket (U1) soldered to the board. ADS7807P plugged into socket (U1). B) To adjust offset, install the proper potentiometer and resistors, ground the input, then adjust the pot accordingly (see Table II and Figure 8). C5 ® J4 J5 06 C7 R17 C9 U8 U7 C10 P6 2 06 07 07 DEVICE SELECT C8 U6 C11 J7 C13 1 39 PARALLEL OUTPUT J4 J5 06 06 07 C12 U9 40 INT CONVERT COMMAND SELECT NOTE: Offset directly affects the gain. Always trim offset first. For maximum precision, more than one iteration of those adjustments may be required. 07 Device Select U1 FOR ±10V INPUT RANGE FOR 0V TO 5V INPUT RANGE FOR 0V TO 4V INPUT RANGE With Trim With Trim Without Trim With Trim Install Install Ref Des. Value FIGURE 6. Factory Settings for Step 1. Without Trim R1 (200Ω) R2 (33.2kΩ) Step 2 — On-Board Input Amplifier Install(1) R3 (200Ω) To use the on-board input amplifier, jumpers J1 and J2 must be set to the “B” position, and P1 (Optional Power) must be supplied with ±15V. The factory setting of the amplifier yields an inverting gain of two. Combinations of resistors R12, R13, and R14 will affect the gain of the amplifier as follows: Install R4 (33.2kΩ) Install R6 (33.2kΩ) Install Install(2) J4 06 C7 R17 2 06 07 07 DEVICE SELECT C8 U6 J5 C9 U8 U7 C10 P6 C11 40 U9 39 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R12 R13 B R12 R13 C2 B C1 A A U2 J1 J2 EXT C2 P2 P4 P5 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT C6 U1 ® A U2 J1 Install(2) POWER C5 INT DATA CLK SELECT B C1 A Install(2) GND +5 PIN 1 C12 J7 PARALLEL OUTPUT ANALOG INPUT R11 B C13 1 R14 INT CONVERT COMMAND SELECT Install(1) R15 R16 U4 BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD OPTIONAL POWER R14 C3 ® –V GND +V P1 P3 J3 C4 U1 U3 Optional Power DIGITAL I/O GND INT DATA CLK SELECT RV1 C3 EXT P1 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT RV2 J2 P5 C6 R15 R16 A U2 J1 P4 C5 J3 C4 A RV2 B C1 R11 PIN 1 Install(2) Install Note: R10 soldered to the board but not involved with input range. R10 functions as a pull-up resistor for SB/BTC pin. P2 DIGITAL I/O GND B C2 Install RV3 (50kΩ) Install(2) (1) Factory Setting: ±10V input range without offset/gain trim, R3, R7 and R8 soldered into board. POWER R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 RV1 OPTIONAL POWER R14 R12 R13 RV3 P3 ANALOG INPUT RV2(50kΩ) Install(2) TABLE II. Input Ranges With and Without Trim. –V GND +V GND +5 U3 U4 J4 06 J2 C7 FIGURE 7. Factory Settings for Step 2. R17 2 J5 06 07 07 DEVICE SELECT C8 U6 C9 U8 U7 C10 P6 C11 40 U9 INT CONVERT COMMAND SELECT C12 J7 C13 1 PARALLEL OUTPUT 39 FIGURE 8. Factory Setting for Step 3. ® DEM-ADS7806/07C Install (1) RV3 BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD Install NOTES: (1) Components associated with offset trim. (2) Components associated with gain trim. Factory Setting: J1 and J2 set to “A”, bypassing the amplifier, R12, R13, R14, C1, C2 and 8-pin socket (U2) soldered to the board. OPA604 plugged into socket (U2). –V GND +V Install Install R9 (1MΩ) RV1 (50kΩ) P1 Install Install R8 (66.5kΩ) NOTE: The on-board input amplifier may improve the quality of the signal reaching the ADS7806P or ADS7807P. This depends on the output characteristics of the signal generator. Install Install(1) R7(100Ω) Gain = – (R14)/(R12 || R13) Install Install R5 (100Ω) Without Trim Install(1) Install 6 RV1 U1 U4 C4 INT DATA CLK SELECT U3 C3 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT C3 EXT C6 P5 C6 RV2 C5 R15 R16 J2 Gain Adjust C) To adjust gain, install the proper potentiometer and resistors, then adjust the pot accordingly. Do this for +FS and –FS (see Table II and Figure 8). P4 J3 C4 A U2 J1 PIN 1 DIGITAL I/O GND C2 B C1 A RV3 B R11 RV2 R12 R13 ANALOG INPUT P2 POWER R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 RV1 OPTIONAL POWER R14 P3 GND +5 RV3 BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD –V GND +V P1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 –V GND +V BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD OPTIONAL POWER R14 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 A U2 J1 J2 EXT C5 P5 C3 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT C6 INT DATA CLK SELECT U1 ® B) J6 set to “EXT” selects an external convert command generator. Apply a negative-going pulse, 100ns in duration, to P4 (External Convert Command). This connector is terminated on the board with a 50Ω resistor (R16). Adjust the voltage of the generator for a 0V to 5V swing and the pulse rate to the desired frequency (≤ 40kHz). U3 U4 J4 06 C7 R17 2 06 07 07 DEVICE SELECT C8 U6 J5 C9 U8 U7 C10 P6 C11 40 U9 INT CONVERT COMMAND SELECT Digital I/O GND A P4 R15 R16 B C1 R11 P2 POWER DIGITAL I/O GND B C2 P5 GND +5 PIN 1 J3 C4 A) J6 set to “INT” selects the on-board convert command generator operating at 40kHz (divided down from 4MHz by U8). R12 R13 RV2 ANALOG INPUT RV1 P1 P3 RV3 Step 4 — On-Board or External Convert Command Generator? C12 J7 C13 1 NOTE: When using an external convert command, the trace powering the on-board convert command generator can be cut to eliminate any noise contributions due to the oscillator. To reconnect the power, install a jumper at J7. PARALLEL OUTPUT 39 +5 +5 REFD PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC FIGURE 10. Factory Settings for Step 5. Step 6 — Parallel or Serial Output? Factory Setting: J6 set to “INT”, conversions synchronized to on-board convert command generator at 40kHz. P4, R15, R16, C12, C13, U8 and U9 soldered to the board. Serial Output A) To use the internal data clock, set J3 to “INT”. Data from the last conversion will be clocked out on pin 21 of P5 at the start of a conversion synchronized to: NOTE: R15 installed but not involved with the internal/ external convert command. • 12 clock pulses output on pin 19 of P5 (ADS7806P) • 16 clock pulses output on pin 19 of P5 (ADS7807P) –V GND +V BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD OPTIONAL POWER R14 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 J2 EXT C3 C6 INT DATA CLK SELECT U1 ® U3 U4 J4 06 C7 R17 2 J5 06 07 07 DEVICE SELECT C8 U6 C9 U8 U7 C10 P6 C11 40 P4 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT U9 External Convert Command INT CONVERT COMMAND SELECT B) To use an external data clock, set J3 to “EXT” and apply an external clock to pin 19 of P5. Data will be output on pin 21 of P5 synchronized to: R15 R16 A U2 J1 P4 P5 R15 R16 A Data is valid on both the rising and falling edges of the internal data clock. Using the internal clock is preferred to optimize system performance. P2 POWER C5 J3 C4 B C1 R11 GND +5 PIN 1 DIGITAL I/O GND B C2 RV2 R12 R13 RV3 ANALOG INPUT RV1 P1 P3 C12 • 12 clock pulses input on pin 19 of P5 (ADS7806P) • 16 clock pulses input on pin 19 of P5 (ADS7807P) J7 C13 1 PARALLEL OUTPUT 39 J6 The frequency of the external clock must not exceed 10MHz. A duty cycle of 40% to 60% is suggested. BUSY (pin 31 of P5) can be used to latch the data. The data will always be from the most recently completed conversion. EXT U8 INT Convert Command Select U9 C12 Parallel Output J7 C) P5 outputs byte-reading parallel data on pins 3, 5 ...15, 17. Refer to the PDS of the ADS7806P and ADS7807P for specific details on the MSB and LSB locations. If pin 25 of P5 is: C13 FIGURE 9. Factory Settings for Step 4. • LOW, the 8 MSBs will be present on the output • HIGH, the 8 LSBs will be present on the output Step 5 — SB or BTC Format? A) To get data in Binary Two’s Complement format, place a jumper from pin 1 to pin 2 on P5. Data will be from the most recently completed conversion. B) To get data in Straight Binary format, remove the jumper from pin 1 to pin 2 on P5. D) P6 outputs 16-bit buffered parallel data converted from serial to parallel via U3, U4, U6, and U7. Data can be acquired on pins: Factory Setting: Pin 1 jumpered to pin 2 on P5, output format is Binary Two’s Complement. • 1 (MSB), 3 ... 21, 23 (LSB) with pins 25, 27, 29 and 31 outputting LOWs for the ADS7806P • 1 (MSB), 3 ... 29, 31 (LSB) for the ADS7807P NOTE: Pins 25, 29 and 33 also have jumpers but are not involved in the output format. ® 7 DEM-ADS7806/07C A rising edge pulse will be output on pin 33 (DATA VALID) of P6 signifying the end of a conversion and that data is valid. Data will be from the most recently completed conversion. Be sure pin 25 of P5 is tied to pin 26 of P5 with a jumper. This puts the MSB on pin 1 of P6. –V GND +V GND +5 P2 P1 Power Optional Power –V GND +V BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD OPTIONAL POWER R14 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 A A U2 J1 J2 EXT P4 P5 C3 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT C6 R15 R16 B C1 R11 P2 POWER C5 J3 C4 B C2 GND +5 PIN 1 DIGITAL I/O GND NOTE: Pins 1, 29, and 33 of P5 have jumpers but are not involved with the output format. R12 R13 RV2 ANALOG INPUT RV1 P1 P3 RV3 Factory Setting: J3 set to “INT”. Pin 25 jumpered to pin 26 on P5. P5, P6, U3, U4, U6, and U7 soldered to the board. INT DATA CLK SELECT U1 ® U3 U4 J4 06 C7 BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD OPTIONAL POWER R14 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 J2 EXT C3 INT DATA CLK SELECT U9 U1 ® U3 U4 J4 06 C7 U6 R17 2 J5 06 07 07 DEVICE SELECT C8 C9 U8 U7 C10 P6 C11 40 U9 R15 A U2 J1 C6 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT Digital I/O GND A P5 R15 R16 C1 R11 P4 J3 C4 RV1 C2 B +5 +5 REFD PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC P2 POWER C5 DIGITAL I/O GND B RV2 R12 R13 RV3 ANALOG INPUT GND +5 PIN 1 INT CONVERT COMMAND SELECT C12 J7 C13 1 PARALLEL OUTPUT 39 U3 U8 C7 R17 C10 P6 1 Parallel Output C11 PARALLEL OUTPUT 40 U9 C12 39 FIGURE 12. Factory Settings for Step 7. OTHER OPTIONS The following pins on P5 serve optional functions of the ADS7806P or ADS7807P: REFD PWRD CS TAG pin pin pin pin 35 33 29 23 Refer to ADS7806P and ADS7807P product data sheets for the description of these options. J3 R17 2 C11 INT CONVERT COMMAND SELECT J7 EXT U7 U8 C13 1 C8 U6 C9 U7 C10 P6 2 R16 –V GND +V P1 P3 06 07 07 DEVICE SELECT C8 U6 P5 J5 INT DATA CLK SELECT Factory Setting: REFD connected to pull-down resistor R15. PWRD tied LOW with jumper from pin 33 to pin 34. CS tied LOW with jumper from pin 29 to pin 30. TAG, no jumper. 40 NOTE: R15 is the pull-down resistor for REFD. R16 is not involved with these functions. 39 FIGURE 11. Factory Settings for Step 6. P5 –V GND +V BURR-BROWN CORP. ADS7806/07 EVALUATION BOARD OPTIONAL POWER R14 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 EXT P5 C3 +5 EXTERNAL +5 CONVERT REFD COMMAND PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC J6 U5 EXT C6 INT DATA CLK SELECT U1 ® B) If the optional amplifier is used, P1 must be supplied with power (OPA604 requires at least ±15V for this application). U3 U4 J4 06 C7 R17 2 Factory Setting: P1 and P2 connectors soldered to the board and ready for connection to the appropriate power supplies. 06 07 07 DEVICE SELECT C8 U6 J5 C9 U8 U7 C10 P6 C11 40 U9 INT CONVERT COMMAND SELECT C12 J7 C13 1 PARALLEL OUTPUT 39 +5 +5 REFD PWRD BUSY CS R/C BYTE TAG SDATA DATACLK D0 D1 D2 D3 D4 D5 D6 D7 SB/BTC R15 R16 J2 C5 Digital I/O GND A U2 J1 P4 R15 R16 B C1 A P2 POWER J3 C4 B R11 A) A 5V power supply connected to P2 (POWER), is all that is required to operate the DEM-ADS7806/07C. C2 GND +5 PIN 1 DIGITAL I/O GND R12 R13 RV2 P3 ANALOG INPUT RV3 Step 7 — Power Supplies? RV1 P1 FIGURE 13. Factory Settings for Other Options. ® DEM-ADS7806/07C 8 9 ® DEM-ADS7806/07C RV3 RV2 RV1 +5V +5V +5V R1 200Ω –V GND +V +5V GND R9 1MΩ 3 7 +V C2 0.1µF C8 0.1µF C9 0.1µF +5V Optional Power R4 33.2kΩ C1 + 0.1µF C3 2.2µF 6 + Power +5V –V +V +5V C4 2.2µF C7 0.1µF 3 2 1 2 1 + + –V 4 OPA604 U2 2 +5V P1 P2 R8 66.5kΩ R7 100Ω R6 33.2kΩ R5 100Ω R3 200Ω R2 33.2kΩ R13 10kΩ R14 10kΩ C10 0.1µF +5V +5V +5V B R12 10kΩ B R11 A C11 0.1µF +5V R10 10kΩ DATA CLK INT EXT C12 0.1µF +5V External Convert Command J3 FIGURE 14. ADS7806/07 Circuit Diagram. Analog Input P3 J2 J1 A C13 0.1µF +5V P4 Out GND 7 14 13 12 11 10 9 8 7 6 5 4 3 2 1 8 DGND D8 D4 D5 D6 D7 EXT/INT SB/BTC AGND2 REF CAP R2IN REFD VANA VDIG 4 1 2 12 15 14 D2 D1 D0 DATACLK SDATA TAG BYTE R/C CS BUSY PWRD U1 ADS7807 AGND1 R1IN R16 49.9Ω 4.000MHz U9 14 +V J7 +5V U8 15 16 17 18 19 20 21 22 23 24 25 26 27 28 +5V 1CKB 1CLKA 1CLR 2CKB 2CKA + 7 6 5 3 9 10 11 13 C6 0.1µF C5 10µF 1QD 1QC 1QB 1QA 2QD 2QC 2QB 2QA 74HCT390 2CLR 1 +5 Convert Command Select INT J6 EXT 2 34 33 22 Digital I/O 2 6 5 1 8 7 4 10 9 3 12 14 13 11 16 18 15 17 20 24 21 19 26 23 28 27 25 30 29 32 36 31 38 40 35 P5 37 39 R15 10kΩ 3 4 5 +5V 07 06 13 R17 10kΩ 07 Device Select 06 J4 Device Select J5 6 +5V +5V +5V +5V +5V 12 14 11 10 12 13 7 6 5 4 3 2 11 10 9 1 7 6 5 4 3 2 11 10 9 1 SER SR CLK /SR CLK RCK /R CLK QH 1 QH QG QF QE QD QC QB QA QD QC QB QA QD 74HC594 U6 SL SER D C B A SR SER CLK S1 S0 CLR QB QA QC 74HC194 U3 SL SER D C B A SR SER CLK S1 S0 U4 10 74HC194 CLR 11 U5 9 7 6 5 4 3 2 1 15 12 13 14 15 12 13 14 15 9 8 9 8 7 6 5 4 3 2 11 1 8D 7D 6D 5D 4D 3D 2D 1D CLK OE 8Q 7Q 6Q 5Q 4Q 3Q 2Q 1Q 74HCT574 U7 12 13 14 15 16 17 18 19 1 3 B2 B1 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 P6 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 37 35 40 39 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 DATA VALID Output Parallel NOTE: This circuit diagram includes the offset and gain circuitry for all input ranges. Refer to pages 3, 4 and 5 for the factory settings. PIN ADS7806/07P FUNCTION PIN ADS7806/07P FUNCTION 1 SB/BTC 2 GND 3 D7 4 5 D6 6 PIN ADS7806P FUNCTION ADS7807P FUNCTION PIN ADS7806/07P FUNCTIONS GND 1 Bit 1 (MSB) Bit 1 (MSB) 2 GND GND 3 Bit 2 Bit 2 4 GND Bit 3 Bit 3 6 GND GND 7 D5 8 GND 5 9 D4 10 GND 7 Bit 4 Bit 4 8 11 D3 12 GND 9 Bit 5 Bit 5 10 GND 13 D2 14 GND 11 Bit 6 Bit 6 12 GND 15 D1 16 GND 13 Bit 7 Bit 7 14 GND 17 D0 18 GND 15 Bit 8 Bit 8 16 GND 19 DATACLK 20 GND 17 Bit 9 Bit 9 18 GND 21 SDATA 22 GND 19 Bit 10 Bit 10 20 GND 23 TAG 24 GND 21 Bit 11 Bit 11 22 GND 25 BYTE 26 GND 23 Bit 12(LSB) Bit 12 24 GND 27 R/C 28 GND 25 Tag 1(1) Bit 13 26 GND 29 CS 30 GND 27 Tag 2(1) Bit 14 28 GND 31 BUSY 32 GND 29 Tag 3(1) Bit 15 30 GND Tag 4(1) Bit 16 (LSB) 32 GND 33 PWRD 34 GND 31 35 REFD 36 GND 33 DATA VALID DATA VALID 34 GND 37 +5V 38 GND 35 NC NC 36 GND 39 +5V 40 GND 37 NC NC 38 GND 39 GND GND 40 GND TABLE III. Pinout of the Digital I/O Connectors (P5) Pin 25 Tied to pin 26 of P5 (BYTE is LOW). NOTE: (1) Tag data will appear when clocking out more than 12 bits of data for the ADS7806P using an external data clock. Refer to the product data sheet. TABLE IV. Pinout of the Buffered Parallel Output. Pin 25 Tied to pin 26 of P5 (BYTE is LOW). FPO FIGURE 15. PCB Component Side. ® DEM-ADS7806/07C 10 –V GND +V GND AIN +5 CC FIGURE 16. PCB Solder Side. ® 11 DEM-ADS7806/07C INSTALLED COMPONENT LIST REFERENCE QUANTITY PART NUMBER DESCRIPTION MANUFACTURER(1) AVX C1, C2, C6-13 10 SR205C104KAA 0.1µF 50VX7R Ceramic Capacitor C3, C4 2 TAP225K025SCS 2.2µF 25V Tantalum Capacitor AVX C5 1 TAP106K010SCS 10µF 10V Tantalum Capacitor AVX J1-J6 6 NSH-3SB-S1-T 3 X 1 Header Robinson Nugent P1 P2 1 1 ED500/3DS ED500/2DS 3-pin Power Block 2-pin Power Block On-Shore Technology On-Shore Technology P3, P4 2 KC-79-274-M06 PCB Mount BNC Connector Kings P5 1 NSH-40DB-S1-T 20 X 2 Header Robinson Nugent P6 1 IDH-40LP-S3-TG 20 X 2 Shrouded Header Robinson Nugent R3 2 5063JD200R0F 200Ω 1/4W 1% MF Resistor Philips R10, R12-15, R17 6 5063JD10K00F 10kΩ 1/4W 1% MF Resistor Philips R16 1 5063JD49R90F 49.9Ω 1/4W 1% MF Resistor Philips R7 1 5063JD100R0F 100Ω 1/4W 1% MF Resistor Philips R8 1 5063JD66K50F 66.5kΩ 1/4W 1% MF Resistor Philips U1 1 ADS7807P 16-Bit Sampling A/D Burr-Brown U2 1 OPA604 Op Amp DIP Burr-Brown U3, U4 2 74HC194 4-Bit Shift Register T.I. U5 1 74HC14 Hex Schmit Inverters T.I. U6 1 74HC594 8-Bit Shift Register T.I. U7 1 74HC574 8-Bit Latch DIP T.I. U8 1 74HC390 Dual Decade Counter T.I. U9 1 F1100E 4.000MHz 4.000MHz Crystal Oscillator Fox 7 MSB-2366-G-C-STP 0.1 Center Line Shunt McKenzie U1 1 DIP-328011B 28-Pin Socket (0.3") McKenzie U2 1 DIP-308011B 8-Pin Socket Mckenzie NOTE: (1) For reference only. Equivalent components may be used. PACKING LIST REFERENCE QUANTITY ITEM DESCRIPTION MANUFACTURER(1) Demo Board 1 DEM-ADS7806/07C Burr-Brown U1 RV1-RV3 R1 1 2 1 ADS7806P RJ26FW503 5063JD200ROF Fully assembled printed circuit board with ADS7807P installed 12-bit 25µs Sampling CMOS A/D Converter 50kΩ 1.4" trimmer resistors (for gain and offset adjust) 200Ω 1/4W 1% MF resistor Burr-Brown Bourns Phillips R2 R4, R6 3 506JD33k2OF 33.2kΩ 1/4W 1% MF resistor Phillips R5 1 5063JD100ROF 100Ω 1/4W 1% MF resistor Phillips R9 1 5063JD1M000F 1MΩ 1/4W 1% MF resistor Phillips R11 1 506JD49R9OF 49.9Ω 1/4W 1% MF resistor Phillips ADS7807P 1 PDS-1158B ADS7806P Product Data Sheet Burr-Brown ADS7806P 1 PDS-1159B ADS7807P Product Data Sheet Burr-Brown Demo Board Info 1 LI-447 DEM-ADS7806/07C Manual Burr-Brown NOTE: (1) For reference only. Equivalent components may be used. ® DEM-ADS7806/07C 12