For t une
Semiconductor Corporation
富晶半導體股½有限公司
FS9721B
2,400 counts auto range DMM IC.
Data Sheet
FS9721B-DS-16_EN
Rev. 1.6
This manual contains new product information.
Fortune Semiconductor Corporation
reserves the rights to modify the
product specification without further notice. No liability is assumed by
Fortune Semiconductor Corporation
as a result of
the use of this product. No rights under any patent accompany the sale of the product.
CR-004
Fo r tun e
Semiconductor Corporation
富晶半導體股½有限公司
2,400 counts auto range DMM IC.
FS9721B
CONTENT
Page
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Description
………………………………………
Features
…………………………………………
Measurable Modes
……………………………
Application
………………………………………
Block Diagram
…………………………………
Pin Diagram
……………………………………
Pin Description
…………………………………
Dice Pad Layout & Pad Coordinate
……………
Technical Specification
…………………………
Measurement Mode Selection
…………………
Keys Definition
………………………………
Other Functions
………………………………
RS232 Transmission Protocol
…………………
LCD Display
…………………………………
Application Description
………………………
Package Outline
………………………………
Demo Board
……………………………………
Ordering Information
…………………………
Revision History
………………………………
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Fortune Semiconductor Corp. TEL : +886-2-2809-4742
http://www.fsc.com.tw
FAX: +886-2-2809-4874
2/31
FS9721B-DS-16_EN Rev. 1.6
Fo r tun e
1. Description
Semiconductor Corporation
富晶半導體股½有限公司
2,400 counts auto range DMM IC.
FS9721B
FS9721B is a high performance, low power consumption, 3⅔ digits (2400 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 FS9721B 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 code; through the setting to
the code can build the fully auto measurement meter. There are Range, Select, Hold/BLCTR, Rel, Hz/Duty,
RS232 and Reset keys so that you can fulfil measurement selection, functions switch, data hold, Backlight display,
relative value, frequency and duty cycle measurement, data transmission, reset and so on functions through these
keys.
FS9721B has series data output function. User can connect the meter to computer to record, analysis, process
and print the measured data.
With regard to the auto power off function, when there is no action within 30 minutes on the switch or
keys of the meter, the system will enter the sleep mode automatically to save the power. In the process of
using the meter, if it is not necessary to power off automatically, the function can also be cancelled in use.
FS9721B 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 low power
voltage so as to be low power
consumption and is convenient to use the power supply of battery, especially is proper for the use on the
palm mode meter.
FS9721B 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
Maximum Display: 2400 (3⅔ digits).
Converter Rate: 3 times/sec.
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).
RS232 Serial Data Output.
Embedded OPAMP for DC/AC switch.
Function Keys: Range, Select, Hold/BLCTR, Rel, Hz/Duty, RS232, Reset.
Unit Symbol and Backlight Display.
Auto Power-off.
Fortune Semiconductor Corp. TEL : +886-2-2809-4742
http://www.fsc.com.tw
FAX: +886-2-2809-4874
3/31
FS9721B-DS-16_EN Rev. 1.6
Fo r tun e
Semiconductor Corporation
富晶半導體股½有限公司
2,400 counts auto range DMM IC.
FS9721B
3. Measurable Modes
DC Voltage: 240.0mV, 2.400V, 24.00V, 240.0V, 1000V.
AC Voltage: 240.0mV, 2.400V, 24.00V, 240.0V, 1000V.
DC: 240.0μA/ 2400μA,24.00mA/ 240.0mA,2.400A, 10.00A.
AC: 240.0μA/ 2400μA,24.00mA/ 240.0mA,2.400A, 10.00A.
Resistance: 240.0Ω,2.400kΩ,24.00kΩ,240.0kΩ,2.400MΩ,24.00MΩ.
Capacitance: 2.500nF,25.00nF,250.0nF,2.500μF,25.00μF.
Frequency: 5.000Hz, 50.00Hz, 500.0Hz, 5.000kHz, 50.00kHz, 500.0kHz, 5.000MHz
Duty Cycle: 0.1%
〜
99.9%.
Diode: 0V
〜
1.5 V.
Short Circuit Testing: Sound when lower than 50Ω.
4. Application
Auto-Measurement Palm Mode Digital Multi-Function Meter.
Auto-Measurement Card Digital Multi-Function Meter.
Auto-Measurement Pen Digital Multi-Function Meter.
Auto-Measurement Clinch Meter (Hook Meter, Clamp Meter, etc.)
Number Panel Meter.
5. Block Diagram
AC-to-DC
Converter
Function,Range
Routers,Opamps,
Comparators
&
Ohm Source
LCD Driver
LCD Display
Input
DMM
Signal
Conditioning
Network
External
Regulation
Network
Microprocessor
Voltage Double
Voltage Regulator
Low Battery Detector
&
Bandgap Reference
Rotary Switch
and
Push Button
Oscillator
&
Clock Generator
BATTERY
CRYSTAL
Diagram 1
Block Diagram
Fortune Semiconductor Corp. TEL : +886-2-2809-4742
http://www.fsc.com.tw
FAX: +886-2-2809-4874
4/31
FS9721B-DS-16_EN Rev. 1.6
Fo r tun e
6. Pin Diagram
Semiconductor Corporation
富晶半導體股½有限公司
2,400 counts auto range DMM IC.
FS9721B
SEG10
SEG11
SEG12
SEG13
SEG14
VDDA
COM1
XOUT
RLCD
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
VGG
TXD
XIN
CA
NC
NC
NC
NC
NC
53
VB
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
52
COM2
COM3
COM4
ENTX
BEEPER
BLOUT
RST
NC
REFI
REFO
FTA
NC
FTB
FTC
TSTC
OP1N
NC
OP1O
NC
OP2P
51
NC
CB
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
NC
NC
VDD
NC
AGND
NC
VSS
TSTA
LCDC2
LCDC1
MEA1
MEA2
MEA3
MEA4
CAP
HZ/DUTY
HOLD
REL
RANGE
SELECT
FS9721B
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
ADPC1
ONEK
SGND
TENK
SA
OP2N
OP2O
ADIN
SMV
HUNK
NC
NC
NC
NC
NC
NC
NC
NC
NC
ONEM
TENM
RCAP
TSTB
ADIP
ADP
DT
RL
Diagram 2
100 PIN Package
7. Pin Description
Package
100
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Pad
78
1
2
3
4
5
6
7
8
9
10
11
SYMBOL
OP2N
NC
OP2O
ADIP
NC
ADIN
NC
SA
SGND
ADP
DT
NC
SMV
CRES1
RL
I/O
I
O
I
I
I
I
I
I/O
I
I/O
I
Description
Negative Input of DC/AC Converter Operation Amplifier
Empty Pin
Output of DC/AC Converter Operation Amplifier
ADC Positive Input of AC Measurement
Empty Pin
ADC Negative Input of AC Measurement
Empty Pin
ADC Input of Current Measurement
ADC Negative Input of Analog Ground Connection
Extra ADC Positive Input
Voltage Division Resistance Connect Point of Diode
Measurement
Empty Pin
High Resistance Voltage Input/ ADC Positive Input of
Resistance Measurement/ Voltage Division Resistance
Connect Point of Diode Measurement
Wave Filter Capacitance Connect Point of Measuring Point
of Resistance Measurement
Reference Voltage Negative Input of Resistance
Measurement
5/31
FS9721B-DS-16_EN Rev. 1.6
Fortune Semiconductor Corp. TEL : +886-2-2809-4742
http://www.fsc.com.tw
FAX: +886-2-2809-4874
ADPC2
CRES1
CRES2
30
100
1
2
3
4
5
6
7
8
9
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