SLVAF40 July 2021 TPS2661
Considering the schematics in Figure 2-1 and Figure 3-1, the pros of the current-loop protector TPS26610 over the discrete solution with the PTC are summarized in Table 4-1.
| TPS26610 | Discrete Solution With PTC | |
|---|---|---|
| Number of components | 3 | 8 |
| Solution size | Reduced up to 85% | 100% |
| Burden resistor properties | Lower size and value | Power dissipation constraints (higher size and value) |
| Signal Good | Yes | No |
| Voltage drop at the terminals | Burden resistor + 200 mV (TPS26610) | Burden resistor + PTC + protection resistors |
| Surge protection | Yes | Yes |
| Miswiring protection | Yes | Yes |
| Protection in powered and unpowered module | Yes | Yes |
In conclusion, the TPS26610 is the integrated solution to both meet the technical specifications required in a current loop protector for AIN and the increasingly-restrictive space conditions.