FS9721_LP1
Contents
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DESCRIPTION ........................................................................................................................................... 3
FEATURES ................................................................................................................................................. 3
MEASURABLE MODES............................................................................................................................. 3
APPLICATION ............................................................................................................................................ 4
BLOCK DIAGRAM ..................................................................................................................................... 4
PIN DIAGRAM ............................................................................................................................................ 5
PIN DESCRIPTION .................................................................................................................................... 5
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DICE PAD LAYOUT & PAD COORDINATE ............................................................................................... 8
TECHNICAL SPECIFICATION (VDD=3V, TA=25℃) ................................................................................ 10
℃
10. MEASUREMENT MODE SELECTION ..................................................................................................... 12
11. KEYS DEFINITION ................................................................................................................................... 14
12. OTHER FUNCTIONS ............................................................................................................................... 14
13. LCD DISPLAY .......................................................................................................................................... 16
14. APPLICATION DESCRIPTION ................................................................................................................ 17
15. PACKAGE OUTLINE................................................................................................................................ 37
16. DEMO BOARD ......................................................................................................................................... 38
17. ORDERING INFORMATION ..................................................................................................................... 41
18. REVISION HISTORY ................................................................................................................................ 42
Rev. 2.0
2/41
FS9721_LP1
1.
Description
FS9721_LP1 is a high performance, low power consumption, 3 /4 digits (4000 Counts)
Analog/Digital Converter (ADC+MCU) that is embedded microprocessor. It contains 8 bit
microprocessor, low noise and high stability operation amplifier, AC conmutation operation
amplifier, voltage promotion and voltage regulated power source, high stability bandgap, auto
measurement switch and function control circuit, buzzer driver circuit, clock oscillator circuit,
Backlight display control circuit, LCD display driver circuit and so on.
Due to FS9721_LP1 is embedded microprocessor so that it can control the logic function
during passing I/O. Measurement functions can be combined differently by using MEA1〜MEA4
pins and CAP pin code; through the setting to the code can build the fully auto and manual
measurement meter. There are Range, Select, Hold, Rel, BLCTR, Hz/Duty and Reset keys so
that you can fulfil measurement selection, functions switch, data hold, Backlight display, relative
value, frequency and duty cycle measurement, reset and so on functions through these keys.
FS9721_LP1 also has auto power-off function. If there is no any action in 15 minutes for the
switch or keys of the meter, the system will enter the sleeping mode to save power.
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FS9721_LP1 is embedded display driver circuit that is designed for driving LCD.
FS9721_LP1 is manufacted by large intergrated circuit technology that has rised hugely the
reliability of product and made the design be easy and the volume be small; the system takes 3V
power source of low consumption for battery supply that is fit especially to the palm mode meter.
FS9721_LP1 is a multi-measurement AC/DC converter that embedded the microprocessor.
Only less addition of external components, you can constitute a high accuracy, mult-function
and low cost meter.
2.
Features
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
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2.10
2.11
2.12
Maximum Display: 4000 (3 /4 digits).
Converter Rate: 3 times/sec.
Measurement Mode: Fully Auto/Manual.
The Negative Instruction: Auto.
Power Voltage Range: 2.4V〜3.6V.
Chip Power Consumption: ≤6mW.
Low Battery Warning: About 2.4 V.
Buzzer Driver Circuit (Frequency is about 2.7kHz).
Embedded OPAMP for DC/AC switch.
Function Keys: Range, Hold, Rel, Select, BLCTR, Hz/Duty, Reset.
Unit Symbol and Backlight Display.
Auto Power-off.
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3.
Measurable Modes
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
DC Voltage: 400.0mV,4.000V,40.00V,400.0V,1000V.
AC Voltage: 400.0mV,4.000V,40.00V,400.0V,1000V.
DC: 400.0μA / 4000μA,40.00mA / 400.0mA,10.00A.
AC: 400.0μA / 4000μA,40.00mA / 400.0mA,10.00A.
Resistance: 400.0Ω,4.000kΩ,40.00kΩ,400.0kΩ,4.000MΩ,40.00MΩ.
Capacitance: 5.120nF,51.20nF,512.0nF,5.120μF,51.20μF,200.0μF(30Sec).
Frequency: 9.999Hz,99.99Hz,999.9Hz,9.999kHz,99.99kHz,999.9kHz,9.999MHz.
Duty Cycle: 0.1%〜99.9%.
Diode: 0V〜1.5 V.
Short Circuit Testing: Sound when lower than 50Ω.
Triode hFE: 0〜4000.
Temperature Measurement:
℃
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Rev. 2.0
3/41
Embedded System
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