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NJU9214

New Japan Radio
Part Number NJU9214
Manufacturer New Japan Radio
Description 4.3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI
Published May 7, 2005
Detailed Description NJU9214 PRELIMINARY 4•3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI ! GENERAL DESCRIPTION The NJU9214 is a 4•3/4 digits ...
Datasheet PDF File NJU9214 PDF File

NJU9214
NJU9214

Overview
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 measurement 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 resistance 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 Converter, 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 NJU9214 !BLOCK DIAGRAM REGURATOR REFERENCE VREF1 VREF2 RESISTORS and SWITCHS VDDA AGND VSSA +5.
0V 0V -5.
0V IVSL, IVSL, IVSH VI, , VI VR2 to 7, OVH, OVH, OVX ADP SGND VDDD VSSD 0V 5.
0V VREF3 A EXTERNAL SWITCH NETWORK DCV, DCV, ACV, ACV, Ω, , ,CAP ,CAP, CAP, DCmA, DCmA, ACmA, ACmA, FRQ, FRQ, rpm REFERENCE BUFFER BATT LOW DETECTOR FRQ ANALOG SECTION COM HIGH SPEED A...


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