TC500_08 Datasheet, PDF (20/38 Pages) Microchip Technology – Precision Analog Front Ends with Dual Slope ADC

TC500/A/510/514
+5V
MCP1525
1 μF
1 μF
C_INT
1 _VOUT-
0.33 μF _{2 CINT}
C_AZ
0.22 μF _{3 CAZ}
TC510
R_INT
100 kΩ
4 _BUF
5 _ACOM
24
CAP-
DGND ²³
22
CAP+
V_DD ²¹
C_REF
R_{2 0.22 μF}
10 kΩ
R₃, 10 kΩ
C₁
0.01 μF
6 _CREF-
7 _CREF+
9 _VREF+
8 _VREF-
CMPTR ¹⁹
18
A
17
B
V_IN+ ¹⁶
V_IN- ¹⁵
1 μF
+5V
INPUT+
INPUT-
+5V
PIC^®MCU
Typical Waveforms
Pin 2
V_IN+
Pin 19
Pin 2
V_IN-
Pin 19
FIGURE 9-1:
TC510 Design Sample.
+5V
MCP1525
1 μF
1 μF
1
C_INT
0.33 μF ₂
V_OUT-
C_INT
CAP- ²⁸
DGND ²⁷
C_AZ
0.22 μF _{3 CAZ}
4
R_INT
BUF
100 kΩ _{5 ACOM}
TC514
26
CAP+
25
V_DD
A0 ²²
A1 ¹⁹
C_REF
R_{2 0.22 μF}
10 kΩ
6 _CREF-
7 _CREF+
CMPTR ²³
A ²²
R₃, 10 kΩ
9 _VREF+
B ²¹
C₁
0.01 μF
8 _VREF-
CH1+ ¹⁸
CH1- ¹³
CH2+ ¹⁷
CH2- ¹²
CH3+ ¹⁶
CH3- ¹¹
CH4+ 15
CH4- 10
FIGURE 9-2:
TC514 Design Example.
1 μF
+5V
Analog
Mux Logic
+5V
PIC^®MCU
INPUT 1+
INPUT 1-
INPUT 2+
INPUT 2-
INPUT 3+
INPUT 3-
INPUT4+
INPUT4-
Typical Waveforms
PIN 2
V_IN+
PIN 23
PIN 2
V_IN-
PIN 23
DS21428E-page 20
© 2008 Microchip Technology Inc.