ZHCSE08D May 2015 – January 2020 TMP107
PRODUCTION DATA.
Figure 40 shows the step response of the TMP107 to a submersion in an oil bath of 100ºC from room temperature (24ºC) at a 3.3-V supply. The time-constant, or the time for the output to reach 63% of the input step, is 1.375 s. The time-constant depends on the printed-circuit board (PCB) that the device is mounted on. For this test, the device is soldered to a two-layer PCB that measures 0.551 in × 0.748 in.
Figure 41 shows the TMP107 eye diagram as a measure of quality for the transmission path (cable). Measurement of eye patterns is performed by a setup where a source generates a known bit stream that is fed into a transmission channel. The eye diagram of TMP107 is taken on the I/O line at the far end of a 300-meter cable connecting two TMP107 devices. The baud rate is 9600 bps, and the supply voltage is set to 3.3 V. The scope is set to trigger on I/O rising (or falling) edge, with an infinite persistent time. The superimposed, captured waveforms create the eye diagram. Excellent eye diagram parameters are maintained at 9600 bps speed.