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7. Application Circuit

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. Cp is the compensation capacitor for measuring capacitance. Its value depends on the parasitic

capacitor on the PCB board.

3. Light shielding for the diodes and Zeners.

4. Zener diodes in above circuit are used for IC protection, so MUST be soldered on PCB first.

V+

V+

CREF+

CREF-

CINT (5)

CAZ

BUFF

RAZ

IVSH

IVSL (10)

OVX

OVH

OVSG

OR1

VR5 (15)

VR4

VR3

VR2

TEST5

ACVL (20)

ACVH

ADI

ADO

ADOHZ

OPO (25)

OPIN+

OPIN-

PWD

VRH

VR (30)

10A

100

99.5

1K

10K

101K

1.111M

91K

10K

1μ

+

0.47μ

0.1μ

0.1μ

10μ

10μ

3V

+

+

5.6V ZI

7.5V ZI

(80) RANGE

HOLD

REL_ZERO

NC

VAHZ

(75) MAX/MIN

BKOUT

BUZOUT

BUZIN

ANNUNC

(70) BP1

BP2

BP3

BP4

SEG01

(65) SEG02

SEG03

SEG04

SEG05

SEG06

(60) SEG07

SEG08

SEG09

SEG10

SEG11

(55) SEG12

SEG13

SEG14

SEG15

SEG16

100n

470n

90k

0.1μ

30k

7.5K

1μ

1μ

7.5K

0.1μ

4.7μ

88M

2K

6K

D1

D2

+

+

1μ

ADP

+

9K

1K

V-

5.6V ZI

1.5K

100K

220p

PTC

Ω

100K

Cp

C

V/Ω/

900

90

9

0.99

0.01

μA

μA

μA/mA

mA

mA

100K

100K

10A

SGND

μA

mA

V-

Hz

1.5K

PTC

4M

V-