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AN-744
S1-5 VIN–
TABLE 2. PIN FUNCTIONS FOR ANALOG I/O CONNECTOR J3
FUNCTION: CONNECTS –OUT OF THE SINGLE - ENDED TO
DIFFERENTIAL OP AMP (AD8132) TO ADC3. S1-
5 AND S1- 6 MUST BE USED TOGETHER, WHEN
VIN – IS IN THE ON POSITION, VIN+ MUST ALSO BE
PIN NUMBER
J3-1
J3-2
PIN DESCRIPTION
AV DD
AGND
USE:
IN THE ON POSITION TO USE THE DIFFERENTIAL OP
AMP ON CHANNEL ADC3 AND ADC4.
SLIDE S1-5 TO THE ON POSITION TO CONNECT –OUT
OF THE AD8132 TO ADC3.
J3-3
J3-4
J3-5
V REF
DAC REF
ADC0
SLIDE S1-5 TO THE OFF POSITION TO USE ADC3
WITHOUT THE AD8132.
S1-6 VIN+
FUNCTION: CONNECTS +OUT OF THE SINGLE-ENDED TO DIFFER-
ENTIAL OP AMP (AD8132) TO ADC4. WHEN VIN+
IS IN THE ON POSITION, VIN – MUST ALSO BE IN THE
ON POSITION TO USE THE DIFFERENTIAL OP AMP ON
CHANNEL ADC3 AND ADC4.
J3-6
J3-7
J3-8
J3-9
J3-10
J3-11
J3-12
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
USE:
S1-7 ADC4
USE:
SLIDE S1-6 TO THE ON POSITION TO CONNECT +OUT
OF AD8132 TO ADC4.
SLIDE S1- 6 TO THE OFF POSITION TO USE ADC4
WITHOUT THE AD8132.
SLIDE S1-6 TO THE ON POSITION TO CONNECT
J3-13
J3-14
J3-15
J3-16
J3-17
ADC8
ADC9
ADC10
ADC11
V DIFF
DIRECTLY ADC4 OF J3 HEADER TO ADC4 PIN
(PIN 1) OF THE ADUC7026.
SLIDE S1-6 TO THE OFF POSITION TO DISCONNECT
ADC4 OF J3 HEADER FROM ADC4 PIN (PIN 1) OF
THE ADUC7026.
S1-8 LED
FUNCTION: CONNECTS THE DAC1 OUTPUT TO THE GREEN LED
OF THE DEMO CIRCUIT, D1.
USE: SLIDE S1-7 TO THE ON POSITION TO CONNECT THE
J3-18
J3-19
J3-20
J3-21
J3-22
J3-23
J3-24
V OCM
DAC0
DAC1
DAC2
DAC3
ADC NEG
AGND
DAC1 OUTPUT TO D1.
SLIDE S1-7 TO THE OFF POSITION TO USE DAC1
OUTPUT ON J3 HEADER.
EXTERNAL CONNECTORS
J3 ANALOG I/O CONNECTOR
THE ANALOG I/O CONNECTOR J3 PROVIDES EXTERNAL CONNECTIONS
FOR ALL ADC INPUTS, REFERENCE INPUTS, AND DAC OUTPUTS. THE
PINOUT OF THE CONNECTOR IS SHOWN IN TABLE 2.
REV. 0
–3–
J5 POWER SUPPLY CONNECTIONS
J5 ALLOWS FOR THE CONNECTION BETWEEN THE EVALUATION BOARD
AND THE 9 V POWER SUPPLY PROVIDED IN THE ADUC7026
DEVELOPMENT SYSTEM.
J4 EMULATION CONNECTOR
J4 PROVIDES A CONNECTION OF THE EVALUATION BOARD TO THE
PC VIA A USB CABLE AND ULINK PROVIDED IN THE ADUC7026
DEVELOPMENT SYSTEM.
J1 SERIAL INTERFACE CONNECTOR
J1 PROVIDES A SIMPLE CONNECTION OF THE EVALUATION BOARD
TO THE PC VIA A PC SERIAL PORT CABLE PROVIDED WITH THE
ADUC7026 DEVELOPMENT SYSTEM.
J2 DIGITAL I/O CONNECTOR
THE DIGITAL I/O CONNECTOR J2 PROVIDES EXTERNAL CONNEC-
TIONS FOR ALL GPIOS. THE PINOUT OF THE CONNECTOR IS SHOWN
IN TABLE 3, WITH DETAILS OF THE PIN FUNCTIONS.
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