NJU9214 NJR Corporation, NJU9214 Datasheet - Page 27

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

(3) Circuit using push type switch ( Current Auto · Manual-2range mode, KMS = " L " )
AC measurement : AC coupling side
1 Low-leak capacitors like as the polypropylene film type are required for accurate measurement.
2 Within 0.01% tolerance resistors or the adjustment by the trimmer potentiometer are recommended.
Rectification
DC400mV : VI side
Others : VR2 side
circuit
block
VSSD
VDDA
VDDD
DCV, ACV,
DCmA, ACmA,
FRQ, rpm
,
ACOUT
RMSIN
VDDD
VDDA
SW3
RMS
KMS
RD1
RD2
RD3
RD4
TRX
RC0
RC1
RC2
RC3
TXS
FC1
FC2
FC3
FC4
KI1
KI2
KI3
KI4
KI5
, , CAP
1
5
10
15
20
25
100
BATT
AC
DC
AUTO
SW7
0.022uF
FUSE
30
ADP
0
95
0.1uF
SW5
REL
N J U 9 2 1 4
SW2
9
35
10
90
10A COM
0.99 0.01
HOLD
40
85
MAX
20
When
When ACmA/DCmA,
/
45
MIN
80
30
/
SW1 is ON.
SW2 is ON.
/ CAP,
MEM
50
75
70
65
60
55
40
Reference Voltage element : over 2.5V
Temperature coefficient : below 200ppm/°C
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
APF
µ m V A
n F r p m
M k
RS232C
10K
°C °F
VSSD
VDDD
4MHz
VDDA
H z
VSSA
+5V
+5V
-5V
BZ
NJU9214
RS232C Driver
10p
10p
VSSD
VSSD
: Lock type switch
: Push type switch
BATTER