Maxim Integrated MAXQ7666 - Manual (Page 93)

MAXQ7665/MAXQ7666 User’s Guide
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Figure 3-1. Analog I/O Module Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Figure 3-2. Differential Input ADC Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Figure 3-3. Multiplexer Input Connection Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
Figure 3-4A. Equivalent Input Circuit (Acquisition Mode with PGA Bypassed) . . . . . . . . . . . . . .3-21
Figure 3-4B. Equivalent Input Circuit (Hold/Conversion Mode with PGA Bypassed) . . . . . . . . . .3-21
Figure 3-5. Unipolar Transfer Function (PGA Gain = 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Figure 3-6. Bipolar Transfer Function (PGA Gain = 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Figure 3-7. PGA Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25
Figure 3-8. Analog Input Range Measuring a Positive Analog Input Value . . . . . . . . . . . . . . . . .3-26
Figure 3-9. Analog Input Range Measuring a Negative Analog Input Value . . . . . . . . . . . . . . . .3-27
Figure 3-10. Single-Edge ADC Conversion Timing; ADC Previously Off and PGA Bypassed . . .3-31
Figure 3-11. Single-Edge ADC Conversion Timing; ADC Previously On and PGA Bypassed . . .3-31
Figure 3-12. Dual-Edge ADC Conversion Timing; ADC Previously Off and PGA > 1 . . . . . . . . . .3-32
Figure 3-13. Flow Chart for Initializing and Using the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33
Figure 3-14. MAXQ7665/MAXQ7666 Temperature Sensor Block Diagram . . . . . . . . . . . . . . . . . .3-34
Figure 3-15. Temperature Transfer Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-36
Figure 3-16. DAC Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-38
LIST OF FIGURES
Maxim Integrated