TC500 Datasheet, PDF (7/28 Pages) TelCom Semiconductor, Inc – PRECISION ANALOG FRONT ENDS

TC500/A/510/514
FIGURE 3-3:
Analog
Input (V_IN)
BASIC DUAL SLOPE CONVERTER
S1
±
REF
VOLTAGE
RINT
CINT
Integrator
–
+
VINT _–
+
TC510
Comparator
Switch Driver
Polarity Control
Phase
Control
Control
Logic
CMPTR Out
V_IN ≈ V_REF
V_IN ≈ 1/2 V_REF
T_INT T_DEINT
V_SUPPLY
V_INT
AB
I/O
Microcomputer
ROM
RAM
Timer
Counter
© 2002 Microchip Technology Inc.
DS21428B-page 7