Rainbow Electronics ADC1173 - Manual (Page 16)

Applications Information
(Continued)
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FIGURE 4. Better defining the ADC Reference Voltage. Self-bias is still used, but the reference voltages are trimmed
by providing a small trim current with the operational amplifiers.
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FIGURE 5. Driving the reference to force desired values requires driving with a low impedance source, provided by
the transistors. Note that pins 16 and 22 are not connected.
ADC1
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