The analog outputs from the evaluation module are fully differential signals centered at a common-mode output voltage of 1.44 V. As Figure 2-2 shows, the outputs are available on the three screw terminals of J3. OUTP is available at J3.2 and swings from 0.5 V to 2.5 V when a negative to positive full-scale linear input signal is applied to the input. OUTN is available at J3.1 and swings from 2.5 V to 0.5 V when a negative to positive full-scale linear input signal is applied to the input.
The pads of R3, R5, C11, C10, and C13 allow users to install their own output filtering. Table 2-1 lists a few example filters. Common-mode filter capacitors C10 and C13 are recommended to be at least 20 times less than the differential filter capacitor, C11.
|Cutoff Frequency||Resistance||Differential Capacitor|
|100 kHz||R3 = R5 = 100 Ω||C11 = 8.2 nF|
|300 kHz||R3 = R5 = 100 Ω||C11 = 2.7 nF|
|600 kHz||R3 = R5 = 100 Ω||C11 = 1.3 nF|