NJU9214 Datasheet, PDF (1/29 Pages) New Japan Radio – 4.3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI

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