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NJU9214 PDF даташит

Спецификация NJU9214 изготовлена ​​​​«New Japan Radio» и имеет функцию, называемую «4.3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI».

Детали детали

Номер произв NJU9214
Описание 4.3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI
Производители New Japan Radio
логотип New Japan Radio логотип 

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NJU9214 Даташит, Описание, Даташиты
NJU9214
PRELIMINARY
4•3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI
!GENERAL DESCRIPTION
The NJU9214 is a 4•3/4 digits single chip digital multimeter LSI with
42 segments bargraph display.
The NJU9214 realizes high precision of ±40,000 counts measure-
ment by the NJRC original dual-slope A to D converter and realizes
also quick response bargragh display and auto-ranging by another high
speed dual-slope A to D converter.
The input attenuator part is simplified because the resistor for resis-
tance measurement is applied for voltage bleeder resistor.
Furthermore, the NJU9214 realizes root-mean-square measurement
for AC voltage and current by connecting a External RMS-DC Con-
verter, and Data output by the on chip RS-232C interface circuit.
The NJU9214 is suitable for high precision and high performance
multimeter.
PACKAGE OUTLINE
NJU9214FG1
!FEATURES
• 4•3/4 Digit Display (Available for UP to ±39,999 Display)
• 42 Segments Quick Response Bargraph Display
• NJRC Original Dual-Slope A to D Converter (±40,000Counts)
• High Speed Dual-Slope A to D Converter (±400Counts)
• Quick Response Auto-Ranging (20times/sec)
• Frequency/Capacitance/Tachometer/Adapter Measurement
• Root-Mean-Square Measurement by connecting a External RMS-DC Converter
• External Relay Driving
• Data Memory/Data Hold/Relative Display/MAX, MIN Display
• Power-on Initializing
• Auto Power-off
• Buttery Life Detector
• Rotary/Push SW Mode Selection
• 1/4 Duty LCD Display Driver
• Piezo Buzzer Direct Driving
• RS-232C Interface
• External Reference Input required
• Low Operating Current
• C-MOS Technology
• Package Outline TQFP100









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NJU9214 Даташит, Описание, Даташиты
!BLOCK DIAGRAM
NJU9214
REGURATOR
REFERENCE
A
DCV, ACV,
, , ,CAP,
DCmA, ACmA,
FRQ, rpm
COM
VDDA AGND VSSA
+5.0V 0V -5.0V
IVSL, IVSH
VI,
VR2 to 7,
OVH,
OVX
VDDD VSSD
5.0V 0V
REFERENCE
BUFFER
ADP
SGND
HIGH
SPEED
A/D SECTION
HIGH
RESOLUTION
A/D SECTION
CAPACITOR
A/D SECTION
BATT
LOW
DETECTOR
ANALOG
FRQ SECTION
BUFFER
RMSIN
SWITCH
NETWORK I/F
HIGH SPEED
A/D I/F
HIGH RESOLUTION A/D I/F
RD1 to 4
FC1 to 4,
KI1 to 5
KEY MATRIX
TRX
TXS
RST
PON
RELAY
CONT-
ROLER
SWITCH
NETWORK
CONTROLER
HIGH SPEED
A/D CONTROLER
HIGH RESOLUTION
A/D CONTROLER
POWER ON
INITIALIZE
4bitBUS
DIGITAL
SECTION
KEY
CONTROLE
RS232C
CONTROLER
BUZZER
CONTROLER
4bit CPU
LCD
CONTROLER
LCD DRIVER and POWER
TEST
OSC
RS232C
DRIVER
BZ
BUZZER
COM1 to 4
SEG1 to 28
LCD
T1 to T3
XT1 XT2









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NJU9214 Даташит, Описание, Даташиты
!PIN CONFIGURATION
NJU9214
BUF
CL2
CH2
VREF3
VREF2
VREF1
CH1
CL1
INT1
INT2
SGND2
SGND1
AGND
IVSH
IVSL
ADP
OVX
OVH
VR7
VR6
VR5
VR4
VR3
VR2
V1
75
80
85
90
95
100
1
70 65 60
55 50
45
NJU9214FG1
40
35
30
5 10 15 20 25
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
COM4
COM3
CMO2
COM1
T3
T2
T1
RST
PON
!TERMINAL DESCRIPTION
No.
1
2
3
4
5 to 8
9
10
11
12
13 to 20
17 to 20
21 to 25
SYMBOL
ACOUT
VDDA
RMSIN
VDDD
RD1 to RD4
TXS
TRX
KMS
RMS
RC0 to RC3
FC1 to FC4
KI1 to KI5
I/O
Out
-
In
-
Out
In
In
In
In
In
I/O
In
FUNCTION
Attenuator output terminal (used at ACA, ACmA, FRQ, rpm)
Analog VDD (VDDA = 5.0 ± 0.25V)
RMS-Voltage Input Terminal
Digital VDD (VDDD = 5.0 ± 0.25V)
Relay Driving Terminal
RS232C Output-Rate Select Terminal L ; 9600bps H ; 2400bps
RS232C Function Select Terminal
Key Mode Select Terminal
Range Control Mode Select Terminal
Range Select Terminal with Input Pull-up Resistance (300k)
Function Select Terminal with Input Pull-up Resistance (300k)
Optional Function Control Terminal with Input Pull-up Resistance (300k)










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