TC3401 Datasheet, PDF (2/16 Pages) Microchip Technology – 16-Bit Low Cost, Low Power Sigma-Delta A/D Converter

TC3401
Typical Application
V_BATT
+
Input 1 _–
+
Input 2 _–
V_BATT
R1
130k
R2
110k
C1
0.1µF
R3
390
±10%
V_DD
IN1+ _ENABLE
IN1-
SDAT
IN2+
IN2-
SCLK
ADDR
V_BATT
TC3401
R6
V_TH
100k
RESET
V_BATT
V_CC
I/01
I/02
I/03
µ
Controller
RST
R7
100k
REF_IN
PFO
I/04
REF_OUT
PFI
I/05
V_BATT
R4
1MΩ
C2
10µF
Functional Block Diagram
IN1+
IN1-
IN2+
IN2-
TC3401
+
–
1 of 2
+
AMux
–
VDD
1.193V
x2
Σ – ∆ ^Data
Modulator ^Shift
Reg.
ADDR
SET
DQ
CLR ^Start
Conv.
Clock
Generator
and Control
Circuitry
V_TH
–
+
1.23V
PFI
–
+
1.23V
Reset Delay
Timer
GND
DS21410B-page 2
REF_OUT
REF_IN
SDAT
SCLK
ENABLE
RESET
PFO
© 2002 Microchip Technology Inc.