ES51963
4 1/2 DMM
Application Circuit
9V battery and 5V microprocessor:
820k
0.1u
9V
5~6V
+
-
Regulator
180k
(-2.5V~-3V)
(+2.5V~+3V)
(2.5V)
LBATT
V+
V-
+
91k
10k
0.1u
0.1u
10u
(-1.23V)
-
V12
(-2.5V)
-
4.7u
AGND (0V)
+
-
+
4.7u
DGND
BUZout
BUZin
OSC1
AGND
Cref+
Cref-
Ref+
(0V)
Vcc
Vss
(-3V)
C1
0.22u/0.47u
4.7u
+
-
8051
serial
OSC2
C2
Ref-
EOC
SCLK
0.47u
33n
Caz
Cint
Buf
STATUS
100k
10k
Vcc(uP)
Rx
10n
10n
BufX10
CP-
CP+
PHin
-
V in
+
0.1u Vin-
100
1M
Signal
Vin+
1n
ES51963
9V battery and 3.3V/3.0V microprocessor:
820k
9V
0.1u
-
180k
6V/6.6V
+
Regulator
(3V/3.3V)
LBATT
V+
V-
DGND
BUZout
BUZin
OSC1
OSC2
+
91k
10k
0.1u
0.1u
10u
(-3.0V/-3.3V)
(-1.23V)
V12
-
-
4.7u
+
AGND (0V)
-
+
AGND
Cref+
Cref-
Ref+
4.7u
(0V)
(0V)
(-3V)
C1
Vcc
Vss
0.22u/0.47u
4.7u
+
-
8051
serial
C2
Ref-
EOC
SCLK
0.47u
Caz
Cint
Buf
33n
STATUS
100k
10k
Vcc(uP)
Rx
10n
10n
BufX10
CP-
CP+
PHin
-
0.1u Vin-
100
V in
+
1M
Signal
Vin+
1n
ES51963
Note: Please see the notes of testing circuit.
19
2003/9/1
CYRUSTEK [ Cyrustek corporation ]
