M4670

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

9 of 9

www.unisonic.com.tw

QW-R502-442.b

APPLICATION INFORMATION (Cont.)

If the input signal as shown in Fig. 7, the equivalent impedance of each input should be equal. To find the

correct values for Ci3 and Ri3, which are found by calculating the parallel combination of all Ci values and all Ri

values. Equations (4) and (5) below are for any number of single-ended sources.

Ci3 = Ci1 + Ci2 + Cin ... (f) (4)

Ri3 = 1 / (1/Ri1 + 1/Ri2 + 1/Rin ...)(Ω) (5)

The M4670 also can use a combination of single-ended and differential sources. A typical application with one

single-ended source and one differential source is shown in Fig. 8. The use of superposition principle, the external

component values can be determined according to the configuration of the above equations(4)(5).

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.