NJU9214FG1 New Japan Radio Co., Ltd., NJU9214FG1 Datasheet

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... 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 QFP100-G1 another high speed NJU9214 PRELIMINARY PACKAGE OUTLINE NJU9214FG1 ...

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NJU9214 BLOCK DIAGRAM A VDDA AGND VSSA +5.0V IVSL, IVSH DCV, ACV, VI ,CAP, VR2 to 7, DCmA, ACmA, OVH, FRQ, rpm OVX ADP COM SGND RMSIN RELAY RD1 to 4 CONT- ROLER FC1 to 4, KI1 to ...

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... TRX 11 KMS 12 RMS RC0 to RC3 FC1 to FC4 KI1 to KI5 65 60 NJU9214FG1 10 15 I/O Out Attenuator output terminal ( used at ACA, ACmA, FRQ, rpm ) – Analog VDD ( VDDA = 5.0 ± 0.25V ) In RMS-Voltage Input Terminal – Digital VDD ( VDDD = 5.0 ± 0.25V ) Out Relay Driving Terminal In RS232C Output-Rate Select Terminal L ...

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NJU9214 No. SYMBOL 26 PON 27 RST COM1 to COM4 SEG1 to SEG28 63 DSR 64 DTR 65 TXD XT2 68 XT1 69 VDSP 70 ...

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FUNCTION DESCRIPTION (1) Measurement function Each measurement functions shown below is available with the NJU9214. MEASUREMENT FUNCTION DC/AC Voltage DC/AC Current DC/AC Current Resistance ( ) Frequency ( f ) Capacitance Tacho (rpm) Diode ( ) Continuity( ) ...

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NJU9214 (1-2) Resistance measurement ( As shown below, six type resistors ( 10M , 1M , 100k , 10k , 1k , 100 used for reference resistors of each range. The output voltage on the measurement terminal is almost same ...

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Frequency ( f ) measurement The input voltage is divided by the attenuator, and then the attenuator output is supplied to counter through the buffer. The divided voltage is converted to DC voltage by the external RMS/DC converter, and ...

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NJU9214 (2-1) Lock type switch (2-1-1) Measurement function selection ( KMS = " H " ) The measurement function is set by FC1 to FC4 terminal. Excepting the following settings, all others select the DCV measurement mode. Measurement mode D ...

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Frequency measurement and revolution measurement are always set to the Auto-Range. Ranges of continuity test ( fixed to the default ranges. Just after the power-on operation or mode changing, the range is set to the default range. In the ...

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NJU9214 (2-2) Push type switch (2-2-1) Measurement function selection ( KMS = " L ", ARMS = " X " ) Measurement function is set to the mode depending on the below matrix table; FC1 FC2 Selection Terminals FC3 FC4 ...

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Range setting ( Push type switch : KMS = " L ", RMS = " X " ) The range setting shown in below table is available with the " RANGE " switch. When the switch is pressed once, ...

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NJU9214 (3) Example of the Latching Relay Driver Circuit RD1 to RD4 are normally " H ". ( Active " L " ) GND COM 10A DCV, ACV CAP, DCmA, ACmA, FRQ, rpm, ADP VDDA VSSA SW ...

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About 10ms pulse width signal shown in below table is outputted from RD1 to RD4. This pulse controls the Latching Relay Driving. FUNCTION · RANGE , , , CAP DCmA, ACmA DC400mV, ADP AC400mV , ACA ACmA, ACA, ACV, FRQ, ...

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NJU9214 (4-5) Buzzer output 2kHz buzzer sounds at following cases ; [ 1 ] Key operation ( except function changing and range changing ) [ 2 ] Auto-power off operation [ 3 ] Continuity test ( ) ; less than ...

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RC1 RC2 Serial Data output The NJU9214 has terminals (TXD,DTR,DSR) for serial data output with RS-232C format requiring a external RS-232C ...

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NJU9214 (5-3) RS-232C Data format As shown below table, the data transmitted through the RS-232C is structured with 1 frame consisting of 17 characters. ( Example ) DCV measurement value = 100mV (5-3-1) Function (5-3-2) Measurement Mode (5-3-3) Sign This ...

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Unit This unit name shows the following characters. (5-3-6) Buttery Life Detector It shows the condition of buttery. (5-3-7) Examples of various data [ Ex DCV400mV range, when following voltage is measured. Measured value 100.01mV Format Pattern ...

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NJU9214 [ Ex DCV400mV range, when overflow is occurred on the positive voltage side by 401mV input. Measured value overflow on the " + " side Format pattern DCV, A □[CR] " . " shows overflow, ...

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Reference voltage The resolution of NJU9214 is 25ppm ( 1/40000 ), and high precision is required for the reference power supply. The reference voltage requires a high precision and a temperature compensated type like as a band-gap reference. Reference ...

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NJU9214 BP- BP0 0 BPN (7-4) Explanation of Display Mark 1. BATT : Low-Battery Detecting mark Displayed in DC voltage and DC current measurement mode Displayed ...

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Bargraph display The bargraph displays 10 times speed comparing with numeric display. However it is not displayed in frequency, revolution and capacitance measurement mode 1. BP- : Displayed when negative signal is input. 2. BP0 : Displayed when the ...

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NJU9214 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Range Control Terminal Voltage Analog Terminal Voltage Supply Terminal Terminal OVH Terminal Current Others Operating Temperature Storage Temperature Range VDDD and VDDA must be same voltage level. ELECTRICAL CHARACTERISTICS (1) DC Characteristics PARAMETER ...

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DC Characteristic ( conversion ) ( VDD = +5.0V, VSSA = –5.0V, AGND = DGND = 0V, DC 400mV range 25°C) PARAMETER Buzzer Driving Current Digital Output Current Select Terminal Output Current Open voltage in ...

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NJU9214 NOTE4 : LCD Diving Voltage ( Example of output waveform ) Waveform of 1/4 Duty, DC400mV range, VIN = 0mV VDD COM1 VDSP VDD COM2 VDSP VDD COM3 VDSP VDD COM4 VDSP VDD SEG1 VDSP VDD SEG2 VDSP VDD ...

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Examples of application circuit. (1) Circuit using lock type switch. ( Current Auto Manual-2 range mode, RMS = " H " ) DCV, ACV CAP, DCmA, ACmA, FRQ, rpm AC measurement : AC coupling side DC400mV : ...

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NJU9214 (2) Circuit using lock type switch ( Current Manual-4 range mode, RMS = " L " ) DCV, ACV CAP, DCmA, ACmA, FRQ, rpm AC measurement : AC coupling side SW7 DC400mV : VI side 0.022uF ...

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Circuit using push type switch ( Current Auto · Manual-2range mode, KMS = " L " ) DCV, ACV CAP DCmA, ACmA, FRQ, rpm AC measurement : AC coupling side SW7 DC400mV : VI side 0.022uF ...

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NJU9214 (4) Application circuit of AC voltage and AC current measurement In case of AC voltage and AC current measurement, AC-DC conversion is required in the external circuit. In use of the mean square circuit, the measurement circuit realizes low ...