19699-002-XTP ON Semiconductor, 19699-002-XTP Datasheet - Page 19

• Manufacturer Part Number: 19699-002-XTP
• Manufacturer: ON Semiconductor

Specifications of 19699-002-XTP

• Number Of Transmitters: 1
• Power Supply Requirement: Dual
• Package Type: LQFP
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Compliant

AMIS-49200
5.3 External Circuitry
Figure 13 shows the external circuitry required to connect the AMIS-49200 to an IEC 61158-2 conformant network. This schematic is
the circuit that was used to pass the FOUNDATION Fieldbus Physical Layer Conformance test as specified in FOUNDATION Fieldbus
specification FF830, Rev 1.5. This circuit is similar but not identical to the circuit recommended by Yokogawa for the μSAA22Q.
Table 13 lists the four external component values that need to be changed with using the AMIS-49200 in a circuit that previously used
the μSAA22Q.
Table 13: Passive External Component Value Differences Between the µSAA22Q and the AMIS-49200
C1 connects to signal CCD (Pin 32) and controls the carrier detect assert and drop-out timing. Particular implementations may require
that the value of C1 be changed to accommodate received signal level changes introduced by the addition of intrinsic safety
components added to the external circuitry. C3 and C4 are part of the receive filter and determine the band pass characteristics of the
receive filter. It is unlikely that these would need to be changed. C8 is a noise filter for VMID. It is important that VMID have as little
Component
C1
C3
C4
C8
μSAA22Q Value
100pf
100pf
470pf
10nf
Figure 13: AMIS-49200 Reference Circuit Implementation
Rev. 5 | Page 19 of 22 | www.onsemi.com
AMIS-49200 Value
150pf
47pf
220pf
1μf