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PDF FS9922-DMM4 Datasheet ( Hoja de datos )

Número de pieza FS9922-DMM4
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FS9922-DMM4 datasheet

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FS9922-DMM4 pdf
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FS9922-DMM4
1. General Description
FS9922-DMM4 is a high performance, low power consumption and 3 6/7 digits (6000 Counts) dual
Analog to Digital Converter with a built-in microprocessor. It includes a 8 bits microprocessor, low noise and
the OPAMP of high stability, AC rectifier OPAMP, voltage doubling and regulated voltage, highly regulated
bandgap, auto measurement switch and function control circuit, buzzer driver circuit, clock oscillation circuit,
backlight display control circuit, LCD driver circuit and so on.
Built-in dual Analog to Digital Converter , one is a high accuracy ADC for main measurement; the other
is a high speed ADC whose measurement result shows by a 61 segment analog section bar that can respond
fast, the analog indication owns the property of immediate response and can provide the fast measurement
and monitoring of instant signals.
With the microprocessor, FS9922-DMM4 can do the logic function control via the I/O ports. By
selecting the codes of MEA1MEA5 pins can realize various functions during measurement.
By triggering the keys of the settings of SELECT, RANGE, REL/RS232, HZ/DUTY, HOLD/LIGHT,
MAX/MIN keys, you can realize the functions of function switch, measurement mode select, relative value
measurement, frequency/duty cycle measurement, reading hold, MAX/MIN value hold, backlight display,
RS232 output and so on.
With the auto power off function, when there is no action on the mode switch or keys of the meter
within 15 minutes, the system will enter into the sleep mode automatically to save the power. This function
can also be cancelled during use.
FS9922-DMM4 has LCD driver circuits, which is designed for driving LCD.
FS9922-DMM4 is made by the large integrated circuit technology, and therefore greatly rises up the
reliability of the product. It makes the design simple, the volume small, low power consumption by using
3V power source, and convenient to use the power supply of battery, especially suitable for the application on
the palm mode meter.
FS9922-DMM4 is a microprocessor-embedded and multifunctional measuring dual ADC; fewer
external components added can form a high accuracy, multifunctional and low cost measuring meter.
2. Features
z Max. Display: 6000 Counts (Frequency 9999), Bar graph 61 segments.
z Converter Rate: 3 times/sec; Bar graph: 30 times/sec.
z Measuring Mode: Auto/Manual measurement.
z Pole Indication: Auto.
z Operation Voltage: 2.4V~3.6V.
z Operation Current: 2mA
z Low Power Indication: about 2.4V.
z Buzzer Frequency: about 2.7kHz.
z AC Rectifying: Embedded OPAMP.
z Current Resistance: µA is 50; mA is 0.5; A is 0.005.
z Function Keys: SELECT, RANGE, REL/ RS232, HZ/DUTY, HOLD/ LIGHT, MAX/MIN.
z Data Output: RS232 (2400bps ).
z Auto Power-off: 15min. (can be cancelled
z Unit Symbol and Backlight Display.
Rev. 1.1
5/39

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FS9922-DMM4 arduino
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FS9922-DMM4
8.2 Electrical Parameters
Symbol
Parameter
Test Condition Min. Typical Max. Unit
VDD
IDD
Recommended
Power Voltage
Operation Current
Operation
In DCV Mode
2.4 3.6 V
1.5 3
mA
IPO
VIH
VIL
AGND
VDDA
VBAND
REFI
Sleep Current
Digital High Voltage Level
Digital Low Voltage Level
Analog Ground Voltage
In Auto Power-off Status
Analog Power Supply
Built in Bandgap Voltage
Coefficient of curve of Bandgap
Voltage along with power
voltage
Recommended
referenced
Voltage
Voltage Relative to
AGND
VDD=2.43.6V
Voltage Relative to
AGND
VDD-0.5
VDDA/2
-3%
3.4
1.1
10
VDDA/2
3.9
1.25
0.5
VDDA/2
+3%
4.4
1.4
2
0.63
µA
V
V
V
V
V
mV/V
V
VBATT Low Voltage Detector
Use DC 3V
2.25 2.4 2.55
V
FLCD
VLCD
FBEEP
FRS232
IRSOUT
LCD Frequency
LCD PK-PK Driver Voltage
Buzzer Frequency
RS232 Baud Rate
RS232 Transmission High
Voltage Level Current
“0”Input Reading
VOH=2V
DC ADP×1
Input=0V
32
2.8 3 3.2
2.7
2400
2
Hz
V
kHz
bps
mA
-1 0 1 digits
Linearity (Max. Deviation From
Best Straight Line Fit)
DC ADP×1
Full Scale±400mV
-1
0
1
Bit
RCC
VFREA
FMAXA
*1
VFRED
FMAX
*1
AC Measurement Bandwidth
Error
AC ADP×1
Input 400mVrms
20Hz~1kHz
Continuity Check Value
ADC Measurement O.L Display
Count
Auto range Up Count
Auto range Down Count
Frequency Count
(Hz/Duty Control)
Voltage VIL (relative to AGND)
VIH (relative to AGND)
Max. Frequency Input (Hz/Duty
Vpp=±100mV
Control)
Square Wave Input
Duty Cycle Measurement
Vpp=±100mV
Deviation (Hz/Duty Control)
Square Wave Input
Frequency Count Input Voltage VIL (relative to AGND)
(MEAS=10100)
VIH (relative to AGND)
(MEAS=10100) Input Frequency
Vpp=±600mV
of Frequency Count
Square Wave Input
(MEAS=10100)Duty
Cycle
Vpp=±600mV
Measurement Deviation
Square Wave Input
10
-60
500
-600
5
6040
6040
560
0.2 %
60
counts
counts
counts
mV
60 mV
kHz
1 µs
mV
600 mV
MHz
100 ns
Accuracy of Capacitance 60.00 nF Mode
2%+10
digits
Measurement in Relative Value 600.0 nF Mode
0.5%+3 digits
Measurement Status (by
600.0nF Mode standard
adjustment)
6.000 µF Mode
60.00 µF Mode
1%+2
1.5%+2
digits
digits
*1 During Duty Cycle measurement, when a square wave is input, the difference comes mainly from the analyzable impulse
width difference of the competitor. If the input is a 100kHz square wave, which can be divided into 1000 counts, each count
is 10 ns. Therefore, the max. difference is 100ns/10 ns=10Counts, 50.0%±1.0% can be measured from 50.0% of output
signal. The signal larger than 99% or less than 1% might not be able to be measured.
Rev. 1.1
10/39

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