TC3403 Datasheet, PDF (2/16 Pages) Microchip Technology – 1.8V Low Power, Quad Input, 16-Bit Sigma-Delta A/D Converter with a Power Fault Monitor and Microprocessor Reset Circuit

TC3403
Typical Application
V_BATT
+
+
+
+
V_BATT R1
130k
R2
110k
R3
C1
390
0.1µF
V_DD
IN1+
IN2+
IN3+
IN4+
SDAT
SCLK
A0
A1
V_BATT
TC3403
R6
V_TH
100k
RESET
V_BATT
V_CC
I/01
I/02
I/03
I/04
µ
Controller
RST
R7
100k
REF_IN
PFO
I/05
REF_OUT
PFI
I/06
V_BATT
R4
1MΩ
C2
10µF
Functional Block Diagram
IN1+
IN2+
IN3+
IN4+
A0
V_DD
+
–
TC3403
1.193V
x2
+
–
1 of 4
Σ – ∆ ^Data
Modulator ^Shift
+
AMux
Reg.
–
+
–
SET
DQ
CLR
Start
Conv.
Clock
Generator
and Control
Circuitry
SET
A1
DQ
CLR
V_TH
–
+
1.205V
PFI
–
+
1.205V
Reset Delay
Timer
GND
DS21412B-page 2
REF_OUT
REF_IN
SDAT
SCLK
RESET
PFO
© 2002 Microchip Technology Inc.