EVALUATION FIXTURE 100kHz 12-BIT ADS7804P 16-BIT ADS7805P INCLUDE

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EVALUATION FIXTURE 100kHz 12-BIT ADS7804P 16-BIT ADS7805P INCLUDE

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DEM-ADS7804/05C
EVALUATION FIXTURE
100kHz 12-BIT ADS7804P 16-BIT ADS7805P INCLUDED 16-BIT BUFFERED PARALLEL OUTPUT CONNECTOR DIGITAL PINS CRYSTAL OSCILLATOR BASED 100kHz CONVERT COMMAND GENERATOR EXTERNAL CONVERT COMAND CONNECTOR PROTOTYPE AREA
DESCRIPTION
DEM-ADS7804/05C Evaluation Fixture fully assembled printed circuit board used evaluate ADS7804P ADS7805P. This device incorporates analog input amplifier (with provisions bypass this amplifier), parallel digital output buffer, crystal oscillator based 100kHz convert command generator, external convert command connector 2.3" 1.2" breadboard area. DEM-ADS7804/05C achieves full converter performance two-layer board. This fixture requires only single power supply. optional bipolar power supply connector provided input amplifier breadboarding.
APPLICATIONS
EVALUATE ADS7804P ADS7805P PERFORMANCE BREADBOARD COMPLETE ANALOG SYSTEM EVALUATE SIMPLE TWO-LAYER LAYOUT INCOMING INSPECTION TEST FIXTURE
International Airport Industrial Park Mailing Address: 11400 Tel: (602) 746-1111 Twx: 910-952-1111 Cable: BBRCORP 1993 Burr-Brown Corporation
Tucson, 85734 Street Address: 6730 Tucson Blvd. Tucson, 85706 Telex: 066-6491 FAX: (602) 889-1510 Immediate Product Info: (800) 548-6132 LI-448 Printed U.S.A. November, 1993
TABLE CONTENTS
This Manual Legend Factory Settings Step-by-Step Basic Operations Device Input Amplifier Offset/Gain Adjust Convert Command Generator Output Format. Power Supplies Other Options Pin-Out Output Connectors. Wiring Diagram Component Side Solder Side Installed Component List. Packing List
THIS MANUAL
table diagrams included "Factory Settings" section showing board configured from factory. listing other components, which shipped with board, also included. Step-by-Step Basic Operations section describes options. each step, figure illustrates factory settings. Items installed highlighted those figures. further details OPA671, ADS7804P, ADS7805P, other device DEM-ADS7804/05C, refer specific product data sheet.
information provided herein believed reliable; however, BURR-BROWN assumes responsibility inaccuracies omissions. BURR-BROWN assumes responsibility this information, such information shall entirely user's risk. Prices specifications subject change without notice. patent rights licenses circuits described herein implied granted third party. BURR-BROWN does authorize warrant BURR-BROWN product life support devices and/or systems.
DEM-ADS7804/05
FIGURE Legend.
FACTORY SETTINGS
With supply connected DEM-ADS7804/ starts converting 100kHz with input range ±10V. Data read bytes full parallel from
MAKE SELECTION EACH STEP Device Input Amplifier Offset Adjust Gain Adjust Convert Command Output Format Power Supplies
Buffered full parallel read from following listing "factory settings".
FACTORY SETTINGS ADS7805P installed. OPA671 bypassed. Trim circuit installed. Trim circuit installed. On-board 100kHz convert command generator connected R/C. 12/16-bit buffered full-parallel output (P6) 2-pin power block (P2) ready +5V.
OPTIONS (requires alteration demo board, needed components included). ADS7804P included installation. Switching jumpers selects input amplifier. Apply ±15V Trim circuit resistors potentiometers included installation. Step-by-Step Basic Operations, step Trim circuit resistors potentiometers included installation. Step-by-Step Basic Operations, step Apply external convert command generator (100kHz) switch "EXT". Full parallel 8-bit byte reading output (P5). 3-pin power block (P1) ready ±15V (for with breadboard optional input amplifier).
NOTE: Each these steps explained detail Step-by-Step Basic Operations section.
TABLE Quick Reference Factory Settings Other Options.
DEM-ADS7804/05
FACTORY SETTINGS (CONT)
Hardware J1-J3 Installed Comments 3-Pin Power Block 2-Pin Power Block Mount Connector Mount Connector Header Shrouded Header 28-Pin Socket ADS7804P ADS7805P 8-Pin Socket OPA671 Headers Refer Step-by-Step Basic Operations, Step
BUSY BYTE OPTIONAL POWER
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER
ANALOG INPUT
EXTERNAL
DIGITAL
SELECT
included
PARALLEL OUTPUT
FIGURE Hardware Installed.
Jumpers for:
Setting "INT"
Comments (Input Amplifier Socket) bypassed Crystal On-Board Convert Command Generator Selected (Outputs 100kHz R/C) Tied BYTE Tied
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
BUSY BYTE
DIGITAL
SELECT
included
FIGURE Jumpers Installed.
DEM-ADS7804/05
FACTORY SETTINGS (CONT)
ADS7804P ADS7805P OPA671 Installed Comments Included Package Plugged into 28-Pin Socket (U1) Plugged into 8-Pin Socket (U2) 4-Bit Decade Counter Schmit Inverters 8-Bit Latch 1.000MHz Crystal Oscillator
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
FIGURE Installed.
Resistors R6-R8 Pots RV1, Capacitors C7-C11
Installed Installed Installed
Comments 576k 1/4W 1%(1) 33.2k 1/4W 1%(1) 49.9k 1/4W 1%(1) 33.2k 1/4W 1/4W 4.99k 1/4W 49.9 1/4W Comments 1/4W 1%(1) Comments 0.1µF (50V) 2.2µF (25V) 10µF (10V)
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
NOTE: Included Package.
FIGURE Resistors Capacitors Installed.
DEM-ADS7804/05
STEP-BY-STEP BASIC OPERATIONS
STEP ADS7804P ADS7805P test ADS7804P, install ADS7804P test ADS7805P, install ADS7805P Factory Setting: 28-pin socket (U1) soldered board. ADS7805P plugged into
OPTIONAL POWER
Gain Adjust adjust gain, install (50k) (576k), then adjust RV2. this +10V -10V. Figure NOTE: offset directly affects gain. Always trim offset first. maximum precision, more than iteration these adjustments required. Factory Setting: ±10V input range without offset/gain trim, soldered board.
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER
BUSY BYTE
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE EXTERNAL
ANALOG INPUT
EXTERNAL
ANALOG INPUT
OPTIONAL POWER
DIGITAL
DIGITAL
SELECT
SELECT
PARALLEL OUTPUT
PARALLEL OUTPUT
FIGURE Factory Settings Step FIGURE Factory Settings Step Step On-Board Input Amplifier on-board input amplifier, jumpers must position, (Optional Power) must supplied with ±15V. factory setting amplifier yields inverting gain Combinations resistors will affect gain amplifier follows: GAIN (R8)/(R6 NOTE: on-board input amplifier improve quality signal reaching ADS7804P ADS7805P. This depends output characteristics signal generator. Factory Setting: "A", bypassing amplifier, 8-pin socket (U2) soldered board. OPA671 plugged into Step Convert Command Generator "INT" selects on-board convert command generator operating 100kHz (divided down from 1MHz U3). "EXT" selects external convert command generator. Apply negative-going pulse, 100ns duration, (External Convert Command). This connector terminated board with resistor (R9). Adjust voltage generator swing pulse rate desired frequency (100kHz). NOTE: When using external convert command, trace powering on-board convert command generator eliminate noise contributions oscillator. reconnect, install jumper Factory Setting: "INT", conversions synchronized on-board convert command generator 100kHz. soldered board.
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE
OPTIONAL POWER
EXTERNAL
ANALOG INPUT
OPTIONAL POWER
DIGITAL
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE EXTERNAL
OPTIONAL POWER
ANALOG INPUT
PARALLEL OUTPUT
FIGURE Factory Settings Step
DIGITAL
SELECT
EXTERNAL
SELECT
Step Offset/Gain Adjust Offset Adjust adjust offset, install (50k) (33.2k), ground input, then adjust RV1. Figure location
PARALLEL OUTPUT
FIGURE Factory Settings Step
DEM-ADS7804/05
Step Parallel Byte-Reading Output
OPTIONAL POWER
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE
ANALOG INPUT
EXTERNAL
outputs byte-reading full parallel data Figure outputs buffered full parallel data-See Figure rising edge pulse will output (Data Valid) signifying conversion that data valid. Data will from most recently completed conversion. sure with jumper. This puts Factory Setting: jumpered (P5), soldered board (See Figures 12).
BUSY BYTE (04P 05P) (05P) (04P)
DIGITAL
SELECT
PARALLEL OUTPUT
BUSY BYTE (05P) (04P) (04P 05P)
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE EXTERNAL
OPTIONAL POWER
DIGITAL
DIGITAL
ANALOG INPUT
DIGITAL
SELECT
PARALLEL OUTPUT
(P5)
(P5) HIGH
FIGURE Location MSBs LSBs
FIGURE Factory Settings Step
OPTIONAL POWER
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE
ANALOG INPUT
EXTERNAL
Step Power Supplies power supply connected (Power) that required operate DEM-ADS7804/05C.
DIGITAL
SELECT
optional amplifier used, must supplied with power (OPA671 requires least ±15V this application). Factory Setting: ready connected appropriate power supplies.
PARALLEL OUTPUT
(P5)
BURR-BROWN CORP. ADS7804/05 EVALUATION BOARD
POWER BUSY BYTE
EXTERNAL
OPTIONAL POWER
(04P 05P)
PARALLEL OUTPUT (04P) (05P)
ANALOG INPUT
POWER
Data Valid
DIGITAL
FIGURE Location MSBs LSBs
OPTIONAL POWER
PARALLEL OUTPUT
SELECT
FIGURE Factory Settings Step
DEM-ADS7804/05
74HCT190 CTEN LOAD MAX/MIN 49.9 External 0.1µF OPA671 0.1µF 4.99k 1.000MHz
NOTE: This circuit diagram includes offset gain circuitry. Refer pages factory settings.
Analog Input
4.99k
FIGURE DEM-ADS7804/05C Circuit Diagram.
33.2k ADS7805 VDIG VANA BUSY BYTE (LSB) 74HCT574 74HCT574 Parallel Output 74HCT14 10µF AGND1 AGND2 (MSB) DGND 2.2µF 2.2µF 0.1µF 576k 33.2k 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF
DEM-ADS7804/05
4.99k
ADS7804P FUNCTION D11(MSB) (LSB) Data Zero Data Zero Data Zero Data Zero BYTE BUSY
ADS7805P FUNCTION D15(MSB) (LSB) BYTE BUSY
ADS7804/05P FUNCTIONS
ADS7804P FUNCTION D11(MSB) (LSB) Data Zero Data Zero Data Zero Data Zero BYTE BUSY
ADS7805P FUNCTION D15(MSB) (LSB) BYTE BUSY
ADS7804/05P FUNCTIONS
TABLE Pinout Digital Connector (P5). tied (BYTE LOW).
TABLE III. Pinout Buffered Output (P6). tied (BYTE LOW).
FIGURE Component Side (Ground Plane).
DEM-ADS7804/05
FIGURE Solder Side
DEM-ADS7804/05
INSTALLED COMPONENT LIST
REFERENCE C7-C11 J1-J3 R6-R8 QUANTITY PART NUMBER SR205C104KAA TAP225K025SCS TAP106K010SCS NSH-3SB-S1-T ED500/3DS ED500/2DS KC-79-274-M06 NSH-40DB-S1-T IDH-40LP-S3-TG 5043EM33K20F 5043EM200R0F 5043EM499K0F 5043EM49R90F ADS7805P OPA671 74HC190 74HC14 74HC574 DOC-2-1.000MHz MSB-2366-G-C-STP DIP-328011B DIP-308011B DESCRIPTION 0.1µF Ceramic Capacitor 2.2µF Tantalum Capacitor 10µF Tantalum Capacitor Header 3-pin Power Block 2-pin Power Block Mount Connector Header Shrouded Header 33.2k 1/4W Resistor 1/4W Resistor 4.99k 1/4W Resistor 49.9 1/4W Resistor 16-Bit Sampling Converter 4-Bit Decade Counter Schmitt Inverters 8-Bit Latch 1.000MHz Crystal Oscillator Centerline Shunt 28-Pin Socket (0.3") 8-Pin Socket MANUFACTURER(1) Kemet Robinson Nugent On-Shore Technology On-Shore Technology Kings Robinson Nugent Robinson Nugent Philips Philips Philips Philips Burr-Brown Burr-Brown T.I. T.I. T.I. Daiwa McKenzie McKenzie McKenzie
PACKING LIST
REFERENCE Demo Board RV1,RV2 ADS7806P ADS7807P Demo Board Info. QUANTITY ITEM DEM-ADS7804/05C ADS7804P RJ26FW503 5043EM576kOF 5043EM33KOF PDS-1156A PDS-1157A LI-448 DESCRIPTION Fully assembled printed circuit board with ADS7805P installed. 12-bit 10µs Sampling CMOS Converter 1/4" trimmer resistors 576k 1/4W resistor 33.2k 1/4W resistor ADS7804 Product Data Sheet ADS7805 Product Data Sheet DEM-ADS7804/05C Manual MANUFACTURER(1) Burr-Brown Burr-Brown Bourns Phillips Phillips Burr-Brown Burr-Brown Burr-Brown
NOTE: reference only. Equivalent components used.
DEM-ADS7804/05

EVALUATION FIXTURE 100kHz 12-BIT ADS7804P 16-BIT ADS7805P INCLUDE

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