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AD28MSP02 Datasheet(PDF) 8 Page - Analog Devices |
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AD28MSP02 Datasheet(HTML) 8 Page - Analog Devices |
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8 / 20 page  AD28msp02 REV. 0 –8– To select values for the components shown in Figure 7, use the following equations: Gain = R FB R IN C IN = 1 60 π R IN C FB = 1 (2 π)(20 ×10 3 ) R FB 10 k Ω ≤ R FB, RIN ≤ 50 kΩ 150 pF ≤ C FB ≤ 600 pF Figure 8 shows an example of a typical input circuit configured for 0 dB gain. The circuit’s diodes are used to prevent the input signal from exceeding maximum limits. 1.0µF 330pF INPUT SIGNAL VCC GNDA MUX VOLTAGE REFERENCE VFBAUX VINAUX AD28msp02 20k Ω 10kΩ 10k Ω VFBNORM VINNORM Figure 8. Example Analog Input Circuit for 0 dB Gain Analog Output The AD28msp02’s differential analog output (VOUTP, VOUTN) is produced by an on-chip differential amplifier. The differential amplifier can drive a minimum load of 2 k Ω (R L ≥ 2 kΩ) and has a maximum differential output voltage swing of ±3.156 V peak-to-peak (3.17 dBm0). The differential output can be ac-coupled directly to a load or dc-coupled to an external amplifier. Figure 9 shows a simple circuit providing a differential output with ac coupling. The capacitor of this circuit (COUT) is optional; if used, its value can be chosen as follows: C OUT = 1 (60 π) R L C OUT C OUT VOUTP VOUT N R L AD28msp02 Figure 9. Example Circuit for Differential Output The VOUTP–VOUTN outputs must be used as differential out- puts; do not use either as a single-ended output. Figure 10 shows an example circuit which can be used to convert the dif- ferential output to a single-ended output. The circuit uses a differential-to-single-ended amplifier, the Analog Devices SSM2141. SSM2141 1 5 7 4 +12 V 0.1 µF 0.1 µF –12 V V OUT AD28msp02 VOUTP VOUTN GNDA GNDA GNDA Figure 10. Example Circuit for Single-Ended Output |
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Similar Description - AD28MSP02 |
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