ADCIN_DIFF_DIFF1.CIR - DIFFERENTIAL TO DIFFERENTIAL ADC INPUT DRIVER * * DIFFERENTIAL SOURCE VPOS 1 5 SIN(0V +2VPEAK 1KHZ) VNEG 2 5 SIN(0V -2VPEAK 1KHZ) * * COMMON MODE VOLTAGE VCM 5 0 DC 0V *VCM 5 0 SIN(1.0V 1VPEAK 10KHZ) * VREF 10 0 DC 0V * * NON-INVERTING OUTPUT R11 2 12 10K R12 12 14 10K R13 1 13 10K R14 13 10 10K XOP1 13 12 14 OPAMP1 * * INVERTING OUTPUT R21 1 22 10K R22 22 24 10K R23 2 23 10K R24 23 10 10K XOP2 23 22 24 OPAMP1 * * * SINGLE-POLE OPERATIONAL AMPLIFIER MACRO-MODEL * connections: non-inverting input * | inverting input * | | output * | | | .SUBCKT OPAMP1 1 2 6 * INPUT IMPEDANCE RIN 1 2 10MEG * DC GAIN (100K) AND POLE 1 (100HZ) * GBWP = 10MHZ EGAIN 3 0 1 2 100K RP1 3 4 1K CP1 4 0 1.5915UF * OUTPUT BUFFER AND RESISTANCE EBUFFER 5 0 4 0 1 ROUT 5 6 10 .ENDS * .TRAN 0.01MS 2MS * .PROBE .END