NJU9214 NJR Corporation, NJU9214 Datasheet - Page 25

• Manufacturer Part Number: NJU9214
• Description: 4·3/4 Digit Single Chip Digital Multimeter Lsi
• Manufacturer: NJR Corporation

(1) Circuit using lock type switch. ( Current Auto Manual-2 range mode, RMS = " H " )
Examples of application circuit.
1 Low-leak capacitors like as the polypropylene film type are required for accurate measurement.
2 Within 0.01% tolerance resisters or the adjustment by the trimmer potentiometer are recommended.
AC measurement : AC coupling side
Rectification
circuit
block
DC400mV : VI side
Others : VR2 side
VDDD
VSSD
VDDA
VDDD
DCV, ACV,
DCmA, ACmA,
FRQ, rpm
,
ACOUT
RMSIN
VDDD
VDDA
RMS
KMS
RD1
RD2
RD3
RD4
TXS
TRX
RC0
RC1
RC2
RC3
, , CAP,
FC1
FC2
FC3
FC4
KI1
KI2
KI3
KI4
KI5
SW3
1
5
10
15
20
25
100
BATT
AC
DC
AUTO
SW7
0.022uF
FUSE
30
A D P
SW1
0
95
SW5
0.1uF
REL
N J U 9 2 1 4
SW2
9
35
10A COM
10
90
0.99 0.01
HOLD
40
20
85
MAX
When
When AcmA/DcmA,
/
45
MIN
80
30
/
SW1 is ON.
SW2 is ON.
/ CAP
MEM
50
75
70
65
60
55
40
CIF1
CIF2
BLD
VSSA
SLEEP
VSSD
VDSP
XT1
XT2
BZ
TXD
DTR
DSR
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
Temperature coefficient : below 20ppm/°C
Reference Voltage element : over 2.5V
APF
µ m V A
n F r p m
M k
RS232C
10K
°C °F
VSSD
VDDD
VDDA
4MHz
H z
VSSA
+5V
+5V
NJU9214
-5V
BZ
RS232C Driver
: Lock type switch
: Push type switch
10p
10p
VSS
VSS
BATTERY