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NJU9214

PRELIMINARY

4鈥?/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI

!

GENERAL DESCRIPTION

The

NJU9214

is a 4鈥?/4 digits single chip digital multimeter LSI with

42 segments bargraph display.

The

NJU9214

realizes high precision of 鹵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

鈥?4鈥?/4 Digit Display (Available for UP to 鹵39,999 Display)

鈥?42 Segments Quick Response Bargraph Display

鈥?NJRC Original Dual-Slope A to D Converter (鹵40,000Counts)

鈥?High Speed Dual-Slope A to D Converter (鹵400Counts)

鈥?Quick Response Auto-Ranging (20times/sec)

鈥?Frequency/Capacitance/Tachometer/Adapter Measurement

鈥?Root-Mean-Square Measurement by connecting a External RMS-DC Converter

鈥?External Relay Driving

鈥?Data Memory/Data Hold/Relative Display/MAX, MIN Display

鈥?Power-on Initializing

鈥?Auto Power-off

鈥?Buttery Life Detector

鈥?Rotary/Push SW Mode Selection

鈥?1/4 Duty LCD Display Driver

鈥?Piezo Buzzer Direct Driving

鈥?RS-232C Interface

鈥?External Reference Input required

鈥?Low Operating Current

鈥?C-MOS Technology

鈥?Package Outline TQFP100

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