Hart/Paff Shunt Selection; Internal Mode Shunt Selection; External Filter Mode With Internal Ref Shunt Selection - Texas Instruments DAC8742H User Manual

DAC8742HEVM Hardware Overview
4.7

HART/PAFF Shunt Selection

The DAC8742HEVM includes various options in allowing the user to connect to an external filter or
external reference. Additionally, these external options can be bypassed as the DAC8742H device
includes an internal HART/PAFF filter, as well as an internal reference. The following configurations
display the jumper configurations required for external filter use or internal filter operation.
4.7.1 Internal Mode
Table 11 lists the internal mode shunt selection.
Jumper
JP8
JP9
JP10
JP11
JP12
JP16
4.7.2 External Mode With Internal REF
Table 12 lists the external filter mode with internal REF shunt selection.
Jumper
JP8
JP9
JP12
JP16
10
DAC8742H Evaluation Module
Table 11. Internal Mode Shunt Selection
Position
CLOSED/HART
OPEN/PAFF
(1 – 2) HART/PAFF
(1 – 2) PAFF
(2 – 3) HART
(1 – 2) HART
(2 – 3) PAFF
(1 – 2) HART/PAFF
(5 – 6) HART
(7 – 8) PAFF
Table 12. External Filter Mode With Internal REF Shunt Selection
Position
CLOSED/HART
OPEN/PAFF
(1 – 2) HART
(2 – 3) PAFF
(1 – 2) HART
(2 – 3) PAFF
(3 – 4) HART
(1 – 2) PAFF
Copyright © 2017, Texas Instruments Incorporated
Description
HART: Connects to 0.022-µF load capacitor
Connects MODINF to MOD_IN terminal block
J7
HART: Connects to 2200 pF
PAFF: Connects to 2700 pF
HART: Connects to 2200 pF
PAFF: Connects to 2700 pF
Connects MODINF to MOD_IN terminal block
J7
HART: Connects to 680 pF
PAFF: Connects to 120 pF
Description
HART: Connects to 0.022-µF load
capacitor
Connects MODINF to MOD_IN terminal
block J7
Connects MODINF to MOD_IN terminal
block J7
HART: Connects to 150-k filter network
PAFF: Connects to 27-k filter network
SLAU700A – June 2017 – Revised November 2017
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