ES51967
6,600 Counts Auto DMM
7. Application Circuit
5.6V ZI
+
7.5V ZI
V-
3V
10μ
+
0.1μ
10μ
0.47μ
0.1μ
μA
μA
V+
μA
CREF+
450
45
mA
0.1μ
220n
220n
450k
150k
(80) VAHZ
MAX/MIN
VST
mA
CREF-
CINT
CAZ (5)
BUFF
RAZ
IVSH
IVSL
OVX (10)
OHMC
OVH
OVSG
OR1
VR5 (15)
VR4
VR3
VR2
OSC2
OSC1
mA
4M
4.5
10A
(75) BKOUT
R_OVH
NC
ZERO
BUZIN
(70) OR
BUZOUT
ANNUNC
10A
0.495
0.005
100K
100K
100K
47n
300p
1.5K
PTC
R
C
100
99.5
1K
10K
BP1
BP2
V-
(65) BP3
BP4
SEG01
SEG02
SEG03
101K
10K
1.111M
TEST5
ACVL (20)
ACVH
10K
(60) SEG04
SEG05
0.1μ
ADI
ADO
15K
1μ
1μ
88M
SEG06
SEG07
SEG08
+
15K
+
0.47μ
(55) SEG09
SEG10
D1
D2
ADOHZ
SEG11
SEG12
SEG13
55K
VRH (25)
10K
27K
VR
VA+
VA-
ADP
1μ
+
SGND (30)
200
9K
330n
220n
V-
1K
+
1.5K
C
1815
Fin
Notes:
1. Most of pins are protected by the ESD protection circuits. However pins, V+, V-, AGND, DGND and
VR1 are not protected enough because the parasitic effect must be decrease. Therefore enough external
protection is needed for assembling, carrying and keeping. In addition, components connecting to these
unprotected pins have to be soldered on board before the IC is soldered.
2. All the zener diodes above are used for IC protection. These protection are needed and these zener
diodes must be soldered on PCB first before soldering ES51967 on.
3. Cp is the compensation capacitor for measuring capacitance. Its value depends on the parasitic
capacitor on the PCB. (The recommended value is not less than the filter capacitor applied at OVX)
4. The capacitance value marked in red means that these capacitors must have good stability and low
leakage current, for example, the MKT type or even better quality ones.
V2.6
29
08/10/06
CYRUSTEK [ Cyrustek corporation ]
