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Part Name  TC500ACPE  Microchip Technology 
Description  Precision Analog Front Ends with Dual Slope ADC 
TC500ACPE Datasheet PDF : 38 Pages

TC500/A/510/514
TTIME
Converter Status
Autozero
Integrator 0
Voltage VINT
Comparator
Output
Undefined
Integrate
Fullscale Input
Reference
Deintegrate
Overshoot Integrator
Output
Zero
Comparator Delay
0 For Negative Input
1 For Positive Input
A
AB Inputs
B
Controller
Operation
A=0
B=1
Begin Conversion with
AutoZero Phase
A=1
B=0
Time Input
Integration
Phase
Sample Input Polarity
A=1
B=1
Capture
Deintegration
Time
A=0
B=0
Integrator Ready for Next
Output
Conversion
Zero Phase (AutoZero is
Complete Idle State)
Typically = TINT
TINT
(Positive Input Shown)
Notes: The length of this phase is chosen almost arbitrarily
but needs to be long enough to null out worst case errors
(see text).
Comparator Delay +
Processor Latency
Minimizing
Overshoot
will Minimize
I.O.Z. Time
FIGURE 51:
Typical Dual Slope A/D Converter System Timing.
DS21428Epage 12
© 2008 Microchip Technology Inc.

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