DEM-ADS7806 [ETC]
DEM-ADS7806 - DISCONTINUED PRODUCT. No longer recommended for new design. ; DEM - ADS7806 - 停产的产品。不再建议用于新设计。\n
| 型号： | DEM-ADS7806 |
| 厂家： | 
ETC |
| 描述： | DEM-ADS7806 - DISCONTINUED PRODUCT. No longer recommended for new design.
|
| 文件： | 总12页 (文件大小：642K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DEM-ADS7806/07C
EVALUATION FIXTURE
DESCRIPTION
FEATURES
The DEM-ADS7806/07C Evaluation Fixture is a fully
assembled printed circuit board intended to evaluate
the ADS7806P and ADS7807P. This device incorpo-
rates 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.
● 40kHz 12-BIT ADS7806P AND 16-BIT
ADS7807P INCLUDED
● 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
This fixture requires only a single +5V power supply.
An optional bipolar power supply connector is
provided for the input buffer and breadboarding.
APPLICATIONS
● 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
Cable: BBRCORP
•
Tucson, AZ 85734
•
Street Address: 6730 S. Tucson Blvd.
• Tucson, AZ 85706
Tel: (602) 746-1111 Twx: 910-952-1111
•
•
•
Telex: 066-6491
•
FAX: (602) 889-1510
•
Immediate Product Info: (800) 548-6132
© 1993 Burr-Brown Corporation
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
on P5, and buffered full-parallel output on P6. The following
is a listing of “factory settings”.
MAKE SELECTION
FOR EACH STEP(1)
OTHER OPTIONS
FACTORY SETTINGS
(requires alteration of the demo board, all needed components included.)
1. Device
ADS7807P installed.
OPA604 bypassed.
ADS7806P included for installation. Switch jumper J4 and J5 to “06”.
Switching jumpers on J1 and J2 to “B” selects input amplifier. Apply ±15V to P1.
0V-5V and 0V-4V.
2. Input Amplifier
3. Input Range
Offset Adjust
±10V
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.
4. Convert Command
On-board 40kHz convert
command generator connected
to R/C.
Apply external convert command generator, (≤40kHz) to P4
and switch J6 to “EXT”.
5. Binary Format
6. Output Format
Binary Two’s Complement
Removing the jumper from pin 1 to pin 2 of P5 selects Straight Binary 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 bread-
board 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
Installed
Comments
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
P1
Yes
3-pin Power Block
P2
P1
EVALUATION BOARD
P2
P3
P4
P5
P6
U1
Yes
Yes
Yes
Yes
Yes
Yes
2-pin Power Block
POWER
P5
OPTIONAL
POWER
PIN 1
P4
P3
PCB Mount BNC Connector
PCB Mount BNC Connector
20 X 2 Header
+5
+5
REFD
PWRD
BUSY
CS
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
B
A
B
A
U2
J1
J2
20 X 2 Shrouded Header
28-pin Socket for
EXT
INT
R/C
BYTE
TAG
SDATA
DATA
CLK
DATACLK
D0
D1
D2
D3
D4
D5
D6
ADS7806P or ADS7807P
8-pin Socket for OPA604
3x1 Headers
SELECT
U2
Yes
Yes
No
U1
J1-6
J7
D7
SB/BTC
Refer to Step-by-Step
Basic Operations,
Step 4B
J4 J5
J6
06
07
06
07
EXT
INT
DEVICE
SELECT
CONVERT
COMMAND
SELECT
2
P6
40
39
J7
1
PARALLEL OUTPUT
J7 is not included
FIGURE 2. Hardware Installed.
Jumpers for:
Setting
Comments
J1, J2
“A”
U2(InputAmplifier
Socket) bypassed
BURR-BROWN CORP.
ADS7806/07
EVALUATION BOARD
J3
“INT”
“07”
Internal Data
Clock Selected
P5
+5
J4, J5
J6
SetforADS7807P
Operation
+5
B
A
B
A
REFD
PWRD
BUSY
CS
J1
J2
“INT”
Crystal On-Board
Convert Com-
EXT
INT
R/C
BYTE
TAG
SDATA
DATACLK
D0
DATA
CLK
SELECT
mand Generator
Selected(Outputs
40kHz to R/C)
D1
D2
D3
D4
D5
D6
D7
P5
P5
P5
P5
Pin 33 to 34
Pin 29 to 30
Pin 25 to 26
Pin 1 to 2
PWRD Tied LOW
CS Tied LOW
SB/BTC
J4 J5
J6
BYTE Tied LOW
06
07
06
07
EXT
INT
SB/BTC Tied
LOW
DEVICE
SELECT
CONVERT
COMMAND
SELECT
J7
J7 not included
FIGURE 3. Jumpers Installed.
®
DEM-ADS7806/07C
4
FACTORY SETTINGS (CONT)
ICs
Installed
Comments
BURR-BROWN CORP.
ADS7806/07
ADS7806P
No
Included in Package
EVALUATION BOARD
ADS7807P
Yes
Plugged into 28-pin
Socket (U1)
OPA604
Yes
Plugged into 8-pin
Socket (U2)
U3, U4
U5
Yes
Yes
Yes
Yes
Yes
4-bit Shift Register
Hex Schmit Inverter
8-bit Shift Register
8-bit Latch
U2
U6
U7
U1
U8
Dual Decade
Counter
U9
Yes
4.000MHz Crystal
Oscillator
U3
U4
U5
U8
U6
U7
U9
FIGURE 4. ICs Installed.
Resistors
Installed
Comments
BURR-BROWN CORP.
ADS7806/07
EVALUATION BOARD
R1
R5
R2, R4, R6
R9
R11
R3
R7
R8
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
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
R14
C5
C6
R12
R13
C2
R6
R7
R8
R9
C1
R11
R10
R10, R12-15,R17
R16
Potentiometers
Installed
Comments
RV1 - RV3
No
50kΩ 1/4"(1)
Capacitors
Installed
Comments
C1, C2, C6 - 13
C3, C4
C5
Yes
Yes
Yes
0.1µF (50V)
2.2µF (25V)
10µF (10V)
C9
C7
C8
NOTE: (1) Included in Package.
C12
R17
C10
C11
C13
FIGURE 5. Resistors and Capacitors Installed.
®
5
DEM-ADS7806/07C
Step 3 — Input Range, Offset/Gain Adjust
Input Range
STEP-BY-STEP
BASIC OPERATIONS
Step 1 — ADS7806P or ADS7807P
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 con-
verter input (factory setting for the gain of the amplifier
is –2V/V).
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.
Install the proper resistors.
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 accord-
ingly (see Table II and Figure 8).
C5
Gain Adjust
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
P2
P1
EVALUATION BOARD
OPTIONAL
POWER
POWER
P5
R1
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).
R2
R3
PIN
1
P4
P3
R14
C5
C6
R4
R12
R13
R5
R6
R7
R8
C6
+5
+5
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
C2
B
B
A
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
C1
R11
A
R9
U2
R10
EXT
J1
J2
INT
DATA
CLK
SELECT
D1
D2
D3
U1
NOTE: Offset directly affects the gain. Always trim offset
first. For maximum precision, more than one iteration of
those adjustments may be required.
D4
D5
D6
D7
®
SB/BTC
U3
U4
U7
J4 J5
J6
U5
06
07
06
07
EXT
INT
J4 J5
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
06
07
06
07
C7
C8
U6
FOR ±10V
INPUT RANGE
FOR 0V TO 5V
INPUT RANGE
FOR 0V TO 4V
INPUT RANGE
R17
C10
P6
C12
U9
C11
2
40
39
J7
Device
Select
C13
1
PARALLEL OUTPUT
U1
Ref Des.
Value
With
Trim
Without
Trim
With
Trim
Without
Trim
With
Trim
Without
Trim
FIGURE 6. Factory Settings for Step 1.
Step 2 — On-Board Input Amplifier
R1 (200Ω)
Install
Install(1)
Install
R2 (33.2kΩ)
Install(1)
Install
R3 (200Ω)
R4 (33.2kΩ)
R5 (100Ω)
Install
Install
Install
Install
Install
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
Install
Install
Install
R6 (33.2kΩ) Install(1)
R7(100Ω)
Install
Install
Install
R8 (66.5kΩ)
R9 (1MΩ)
Install(2)
Install(2)
Install(1)
Install(2)
Install(1)
Gain = – (R14)/(R12 || R13)
RV1 (50kΩ)
RV2(50kΩ) Install(1)
RV3 (50kΩ) Install(2)
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(2)
Install(2)
NOTES: (1) Components associated with offset trim. (2) Components asso-
ciated with gain trim.
Factory Setting: J1 and J2 set to “A”, bypassing the ampli-
fier, R12, R13, R14, C1, C2 and 8-pin socket (U2) soldered
to the board. OPA604 plugged into socket (U2).
TABLE II. Input Ranges With and Without Trim.
Factory Setting: ±10V input range without offset/gain trim,
R3, R7 and R8 soldered into board.
Note: R10 soldered to the board but not involved with input
range. R10 functions as a pull-up resistor for SB/BTC
pin.
–V GND +V
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
P2
P1
EVALUATION BOARD
OPTIONAL
POWER
POWER
P5
R1
R2
R3
PIN
1
P4
P3
R14
C5
C6
R4
P1
R12
R13
R5
R6
R7
R8
+5
+5
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
D4
D5
D6
D7
SB/BTC
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
C2
B
B
A
C1
R11
A
R9
U2
R10
EXT
J1
J2
Optional
Power
–V GND +V
GND +5
INT
BURR-BROWN CORP.
ADS7806/07
DATA
CLK
SELECT
P2
P1
EVALUATION BOARD
OPTIONAL
POWER
POWER
P5
R1
R2
R3
PIN
1
P4
P3
U1
R14
C5
C6
R4
®
R12
R13
R5
R6
R7
R8
R14
+5
+5
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
D4
D5
D6
D7
SB/BTC
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
C2
B
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
B
A
C1
R11
U3
U4
U7
R9
R10
EXT
J4 J5
J6
A
U2
U5
06
07
06
07
EXT
INT
J1
J2
R12
R13
INT
C2
B
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
DATA
CLK
SELECT
C7
C8
U6
B
A
U1
C1
®
R17
C10
P6
C12
U9
C11
2
40
39
J7
A
U3
U4
U7
J4 J5
J6
U2
C13
U5
06
07
06
07
EXT
INT
1
PARALLEL OUTPUT
J1
J2
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
C7
C8
U6
R17
C10
P6
C12
U9
C11
2
40
39
FIGURE 7. Factory Settings for Step 2.
J7
C13
1
PARALLEL OUTPUT
FIGURE 8. Factory Setting for Step 3.
®
DEM-ADS7806/07C
6
Step 4 — On-Board or External Convert Command
Generator?
P5
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
P2
P1
EVALUATION BOARD
+5
+5
REFD
PWRD
BUSY
CS
OPTIONAL
POWER
POWER
P5
R1
R2
R3
PIN
1
P4
P3
R14
C5
C6
R4
R12
R13
R5
R6
R7
R8
+5
+5
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
D4
D5
D6
D7
SB/BTC
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
C2
B
B
A
C1
R11
A) J6 set to “INT” selects the on-board convert command
generator operating at 40kHz (divided down from 4MHz
by U8).
A
R9
U2
R10
EXT
J1
J2
INT
DATA
CLK
SELECT
U1
R/C
®
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
D4
D5
D6
U3
U4
U7
J4 J5
J6
U5
06
07
06
07
EXT
INT
B) J6 set to “EXT” selects an external convert command
generator. Apply a negative-going pulse, 100ns in dura-
tion, 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).
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
C7
C8
U6
R17
C10
P6
C12
U9
C11
2
40
39
J7
C13
1
PARALLEL OUTPUT
D7
SB/BTC
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.
FIGURE 10. Factory Settings for Step 5.
Step 6 — Parallel or Serial Output?
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:
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.
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
GND +5
BURR-BROWN CORP.
ADS7806/07
P2
P1
EVALUATION BOARD
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.
OPTIONAL
POWER
POWER
P5
R1
R2
R3
PIN
1
P4
P3
R14
C5
C6
R4
P4
R12
R13
R5
R6
R7
R8
R9
R10
EXT
+5
+5
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
C2
B
B
A
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
D4
D5
D6
D7
SB/BTC
C1
R11
A
U2
J1
J2
INT
DATA
CLK
SELECT
External
Convert
Command
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:
U1
®
U3
U4
U7
J4 J5
J6
U5
06
07
06
07
EXT
INT
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
C7
C8
U6
• 12 clock pulses input on pin 19 of P5 (ADS7806P)
• 16 clock pulses input on pin 19 of P5 (ADS7807P)
R17
C10
P6
C12
U9
C11
2
40
39
J7
C13
1
PARALLEL OUTPUT
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
INT
Convert
Command
Select
U8
C12
U9
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 conver-
sion.
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 com-
pleted 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
Power
P2
P1
Optional
Power
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
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.
P2
P1
EVALUATION BOARD
OPTIONAL
POWER
POWER
P5
R1
R2
R3
PIN
1
P4
P3
R14
C5
C6
R4
R12
R5
R6
R7
R8
+5
+5
REFD
PWRD
BUSY
CS
EXTERNAL
CONVERT
COMMAND
ANALOG
R13
C2
B
INPUT
B
C1
R11
A
A
R9
U2
NOTE: Pins 1, 29, and 33 of P5 have jumpers but are not
involved with the output format.
R10
EXT
J1
J2
R/C
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
INT
DATA
CLK
SELECT
U1
D4
D5
®
D6
D7
SB/BTC
U3
U4
U7
J4 J5
J6
U5
06
07
06
07
EXT
INT
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
C7
C8
U6
P5
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
P2
P1
+5
+5
REFD
PWRD
BUSY
CS
R17
C10
P6
C12
U9
C11
EVALUATION BOARD
2
40
39
OPTIONAL
POWER
POWER
P5
R1
J7
R2
R3
PIN
1
P4
P3
R14
C5
C6
C13
R4
R12
R13
R5
R6
R7
R8
+5
+5
EXTERNAL
CONVERT
COMMAND
1
PARALLEL OUTPUT
ANALOG
INPUT
C2
B
B
A
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
C1
R11
A
R9
U2
R10
EXT
J1
J2
INT
U9
DATA
CLK
SELECT
FIGURE 12. Factory Settings for Step 7.
R/C
U1
D3
D4
D5
®
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D6
D7
SB/BTC
U3
U4
U7
J4 J5
J6
U5
06
07
06
07
EXT
INT
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
OTHER OPTIONS
C9
C7
C8
U6
The following pins on P5 serve optional functions of the
ADS7806P or ADS7807P:
R17
C10
P6
C12
U9
C11
2
40
39
J7
C13
1
PARALLEL OUTPUT
D3
D4
D5
D6
D7
REFD
PWRD
CS
pin 35
pin 33
pin 29
pin 23
U3
U8
U7
SB/BTC
TAG
C7
U6
C8
Refer to ADS7806P and ADS7807P product data sheets for
the description of these options.
EXT
INT
DATA
CLK
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.
SELECT
R17
C10
P6
C11
2
40
39
NOTE: R15 is the pull-down resistor for REFD. R16 is not
involved with these functions.
1
Parallel Output
FIGURE 11. Factory Settings for Step 6.
P5
–V GND +V
GND +5
BURR-BROWN CORP.
ADS7806/07
+5
+5
REFD
PWRD
BUSY
CS
P2
P1
EVALUATION BOARD
OPTIONAL
POWER
POWER
P5
R1
R2
R3
PIN
1
P4
P3
R14
C5
C6
Step 7 — Power Supplies?
R4
R12
R13
R5
R6
R7
R8
+5
+5
EXTERNAL
CONVERT
COMMAND
ANALOG
INPUT
C2
B
B
A
REFD
PWRD
BUSY
CS
R/C
BYTE
TAG
SDATA
DATACLK
D0
C1
R11
A
R9
U2
R10
EXT
J1
J2
A) A 5V power supply connected to P2 (POWER), is all
that is required to operate the DEM-ADS7806/07C.
INT
DATA
CLK
SELECT
D1
R/C
D2
D3
D4
D5
U1
®
BYTE
TAG
SDATA
DATACLK
D0
D1
D2
D3
D4
D5
D6
D7
SB/BTC
B) If the optional amplifier is used, P1 must be supplied with
power (OPA604 requires at least ±15V for this applica-
tion).
U3
U4
U7
J4 J5
J6
U5
06
07
06
07
EXT
INT
DEVICE
SELECT
CONVERT
COMMAND
SELECT
U8
C9
C7
C8
U6
R17
C10
P6
C12
U9
C11
2
40
39
J7
Factory Setting: P1 and P2 connectors soldered to the board
and ready for connection to the appropriate power supplies.
C13
1
PARALLEL OUTPUT
D6
D7
SB/BTC
FIGURE 13. Factory Settings for Other Options.
®
DEM-ADS7806/07C
8
®
9
DEM-ADS7806/07C
PIN
ADS7806/07P FUNCTION
PIN
ADS7806/07P FUNCTION
ADS7806/07P
FUNCTIONS
PIN ADS7806P FUNCTION
ADS7807P FUNCTION PIN
1
SB/BTC
D7
2
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
1
Bit 1 (MSB)
Bit 2
Bit 1 (MSB)
Bit 2
2
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
3
4
3
4
5
D6
6
5
Bit 3
Bit 3
6
7
D5
8
7
Bit 4
Bit 4
8
9
D4
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
9
Bit 5
Bit 5
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
D3
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Bit 6
Bit 6
D2
Bit 7
Bit 7
D1
Bit 8
Bit 8
D0
Bit 9
Bit 9
DATACLK
SDATA
TAG
BYTE
R/C
Bit 10
Bit 11
Bit 12(LSB)
Tag 1(1)
Tag 2(1)
Tag 3(1)
Tag 4(1)
DATA VALID
NC
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
Bit 16 (LSB)
DATA VALID
NC
CS
BUSY
PWRD
REFD
+5V
NC
NC
+5V
GND
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).
FIGURE 15. PCB Component Side.
®
DEM-ADS7806/07C
10
–V
GND +V
+5
GND
AIN
CC
FIGURE 16. PCB Solder Side.
®
11
DEM-ADS7806/07C
INSTALLED COMPONENT LIST
REFERENCE
QUANTITY
PART NUMBER
DESCRIPTION
MANUFACTURER(1)
C1, C2, C6-13
C3, C4
C5
10
2
SR205C104KAA
TAP225K025SCS
TAP106K010SCS
NSH-3SB-S1-T
0.1µF 50VX7R Ceramic Capacitor
2.2µF 25V Tantalum Capacitor
10µF 10V Tantalum Capacitor
3 X 1 Header
AVX
AVX
1
AVX
J1-J6
6
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
1
1
2
6
1
1
1
1
1
2
1
1
1
1
1
7
1
1
KC-79-274-M06
NSH-40DB-S1-T
IDH-40LP-S3-TG
5063JD200R0F
5063JD10K00F
5063JD49R90F
5063JD100R0F
5063JD66K50F
ADS7807P
PCB Mount BNC Connector
20 X 2 Header
Kings
Robinson Nugent
Robinson Nugent
Philips
P5
P6
20 X 2 Shrouded Header
200Ω 1/4W 1% MF Resistor
10kΩ 1/4W 1% MF Resistor
49.9Ω 1/4W 1% MF Resistor
100Ω 1/4W 1% MF Resistor
66.5kΩ 1/4W 1% MF Resistor
16-Bit Sampling A/D
Op Amp DIP
R3
R10, R12-15, R17
Philips
R16
R7
Philips
Philips
R8
Philips
U1
Burr-Brown
Burr-Brown
T.I.
U2
OPA604
U3, U4
U5
74HC194
4-Bit Shift Register
74HC14
Hex Schmit Inverters
8-Bit Shift Register
T.I.
U6
74HC594
T.I.
U7
74HC574
8-Bit Latch DIP
T.I.
U8
74HC390
Dual Decade Counter
4.000MHz Crystal Oscillator
0.1 Center Line Shunt
28-Pin Socket (0.3")
T.I.
U9
F1100E 4.000MHz
MSB-2366-G-C-STP
DIP-328011B
DIP-308011B
Fox
McKenzie
McKenzie
Mckenzie
U1
U2
8-Pin Socket
NOTE: (1) For reference only. Equivalent components may be used.
PACKING LIST
REFERENCE
QUANTITY
ITEM
DESCRIPTION
MANUFACTURER(1)
Demo Board
1
DEM-ADS7806/07C
Fully assembled printed circuit board with
ADS7807P installed
Burr-Brown
U1
RV1-RV3
R1
1
2
1
ADS7806P
RJ26FW503
5063JD200ROF
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
R5
3
1
1
1
1
1
1
506JD33k2OF
5063JD100ROF
5063JD1M000F
506JD49R9OF
PDS-1158B
33.2kΩ 1/4W 1% MF resistor
100Ω 1/4W 1% MF resistor
1MΩ 1/4W 1% MF resistor
49.9Ω 1/4W 1% MF resistor
ADS7806P Product Data Sheet
ADS7807P Product Data Sheet
DEM-ADS7806/07C Manual
Phillips
Phillips
R9
Phillips
R11
Phillips
ADS7807P
ADS7806P
Demo Board Info
Burr-Brown
Burr-Brown
Burr-Brown
PDS-1159B
LI-447
NOTE: (1) For reference only. Equivalent components may be used.
®
DEM-ADS7806/07C
12
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