TC3404_05 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

TC3404
Typical Application
V_BATT
Input 1
Input 2
Input 3
Input 4
IN1+ ^VDD
IN2+
IN3+
IN3-
SDAT
SCLK
A0
IN4+
A1
IN4-
TC3404
V_BATT
V_CC
I/01
I/02
I/03
I/04 _μ
Controller
C1
0.1μF
R3
390
±10%
REFIN
REFOUT
PFO
PFI
R7
100k
V_BATT
R4
1MΩ
±10%
I/05
I/06
C2
10μF
Functional Block Diagram
IN1
IN2
IN3+
IN3-
IN4+
IN4-
A0
V_DD
+
TC3404
–
1.193V
x2
+
–
1 of 4
+
AMux
–
Σ – D ^Data
Modulator ^Shift
Reg.
+
–
SET
DQ
CLR
Clock
Generator and
Start ^{Control Circuitry}
Conv.
SET
A1
DQ
CLR
PFI
–
+
1.205V
GND
REF_OUT
REF_IN
SDAT
SCLK
PFO
DS21413C-page 2
© 2005 Microchip Technology Inc.