LMF100_15 Datasheet, PDF (27/40 Pages) Texas Instruments – LMF100 Dual High-Performance Switched Capacitor Filters

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Typical Application (continued)
LMF100
SNOSBG9B – JULY 1999 – REVISED JUNE 2015
Single 10-V power supply. 0-V to 5-V TTL logic levels. Input signals should be referred to half-supply or applied
through a coupling capacitor.
Figure 55. Fourth-Order Chebyshev Lowpass Filter from Example in 3.1.
Figure 56. Three Ways of Generating V⁺/2 for
Single-Supply Operation Option A
Figure 57. Three Ways of Generating V⁺/2 for
Single-Supply Operation Option B
Figure 58. Three Ways of Generating V⁺/2 for Single-Supply Operation Option C
9.2.2.2 Dynamic Considerations
The maximum signal handling capability of the LMF100, like that of any active filter, is limited by the power
supply voltages used. The amplifiers in the LMF100 can swing to within about 1 volt of the supplies, so the input
signals must be kept small enough that none of the outputs will exceed these limits. If the LMF100 is operating
on ±5 volts, for example, the outputs will clip at about 8 V_p-p. The maximum input voltage multiplied by the filter
gain should therefore be less than 8 V_p-p.
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