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MAX1192 Datasheet(PDF) 16 Page - Maxim Integrated Products |
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MAX1192 Datasheet(HTML) 16 Page - Maxim Integrated Products |
16 / 28 page Ultra-Low-Power, 22Msps, Dual 8-Bit ADC 16 ______________________________________________________________________________________ Input Track-and-Hold (T/H) Circuits Figure 3 displays a simplified functional diagram of the input T/H circuits. In track mode, switches S1, S2a, S2b, S4a, S4b, S5a, and S5b are closed. The fully dif- ferential circuits sample the input signals onto the two capacitors (C2a and C2b) through switches S4a and S4b. S2a and S2b set the common mode for the ampli- fier input, and open simultaneously with S1, sampling the input waveform. Switches S4a, S4b, S5a, and S5b are then opened before switches S3a and S3b connect capacitors C1a and C1b to the output of the amplifier and switch S4c is closed. The resulting differential volt- ages are held on capacitors C2a and C2b. The ampli- fiers charge capacitors C1a and C1b to the same S3b S3a COM S5b S5a INB+ INB- S1 OUT OUT C2a C2b S4c S4a S4b C1b C1a INTERNAL BIAS INTERNAL BIAS COM HOLD HOLD CLK INTERNAL NONOVERLAPPING CLOCK SIGNALS TRACK TRACK S2a S2b S3b S3a COM S5b S5a INA+ INA- S1 OUT OUT C2a C2b S4c S4a S4b C1b C1a INTERNAL BIAS INTERNAL BIAS COM S2a S2b MAX1192 Figure 3. Internal T/H Circuits |
Similar Part No. - MAX1192 |
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Similar Description - MAX1192 |
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