NJU9214 NJR Corporation, NJU9214 Datasheet - Page 19

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

(6) Reference voltage
The reference voltage requires a high precision and a temperature compensated type like as a band-gap reference.
(7) Example of Display Layout
The resolution of NJU9214 is 25ppm ( 1/40000 ), and high precision is required for the reference power supply.
Reference voltages, VREF1 and VREF2 are about 0.2V, and VREF3 is about 1.4V.
COM1
COM2
COM3
COM4
COM1
COM2
COM3
COM4
COM1
COM2
COM3
COM4
(7-1) Connection of Common Line
(7-2) Connection of Segment Line
(7-3) Segment Assignment
COM4
COM3
COM2
COM1
SEG11
SEG21
HOLD
SEG1
BP18
BP17
BP35
BPN
BP0
BP-
DC
P3
d0
g0
a0
SEG12
SEG22
BATT
BATT
SEG2
BATT
BP20
BP19
BP37
BP36
BP2
BP1
AUTO
e2
c0
b0
f2
AUTO
-
AC
DC
AC
DC
SEG13
SEG23
AUTO
SEG3
0
BP21
BP39
BP38
MEM
0
BP4
BP3
AC
d2
g2
a2
REL
µ
REL
SEG14
SEG24
SEG4
BP23
BP22
BP40
APF
BP6
BP5
e4
c2
b2
f4
m
n
HOLD
10
10
HOLD
SEG15
SEG25
SEG5
BP25
BP24
MAX
BP7
P2
d4
g4
a4
M
F
V
MAX
MAX
20
20
SEG16
SEG26
SEG6
BP27
BP26
BP9
BP8
rpm
°C
c4
b4
e1
°F
f1
k
MIN
MIN
30
30
SEG17
SEG27
SEG7
BP10
BP28
PB11
REL
P4
Hz
d1
g1
a1
A
MEN
MEN
40
40
RC232C
SEG18
SEG28
SEG8
PB13
BP12
BP30
BP29
APF
e3
c1
b1
f3
/
/
/
APF
µ m V A
n F r p m
M k
RS232C
µ m V
n F r p m
M k
RS232C
SEG19 SEG20
°C
°C
SEG9
BP14
BP32
BP31
MIN
NJU9214
P1
g3
a3
d3
/
/
/
/
/
Hz
Hz
A
F
F
SEG10
BP16
BP15
BP34
BP33
c3
b3
e0
f0
/
/
/
/
/