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SC7001Q Schematic ( PDF Datasheet ) - Silan Microelectronics

Teilenummer SC7001Q
Beschreibung 3 3/4-DIGIT 3260-COUNT A/D CONVERTER
Hersteller Silan Microelectronics
Logo Silan Microelectronics Logo 




Gesamt 17 Seiten
SC7001Q Datasheet, Funktion
SC7001Q
33/4 DIGITS LCD DISPLAY ,3260-COUNT A/D FOR DMM
DESCRIPTION
The SC7001Q is a low power CMOS dual-slope A/D converter with 3
3/4-digit numeric and 33-segment bar-graph LCD display driver, auto-
ranging, and single 3V battery operation.
It is ideal for high performance auto-range DMM applications with
3260 counts full-scale.
The SC7001Q provides many user function: Manual Range Hold/Data
Hold/Auto Power-off/Voltage/Current/Resistance measurement/Diode
Test/Continuity Check(Beeper). The built-in high temperature-stable CMOS
QFP-80-14×20-0.8
bandgap reference and a CMOS Op Amp for ac-to-dc conversion are
economical of saving external components. In addition, the voltage doubler
enables a high performance digital multimer to be built with single 3V power
supply operation.
ORDERING INFORMATION
FEATURES
* Auto range function
Part no.
SC7001Q
Package
QFP-80-14X20-0.8
--Voltage (DC/AC):326.0mV(NA for AC), 3.260V, 326.0V, 3260V
--Resistance: 326.0Ω,3.260kΩ, 32.60kΩ, 326.0kΩ, 3.260MΩ, 32.60 MΩ
-- Current (DC/AC): 326.0μA, 3260μA, 32.60mA, 326.0mA, 10A
* Triplex LCD driver including decimal points, bargraph, and annunciators
* Low power consumption: less than 1.8mW.
APPLICATIONS
Hand-held DMM
* Pocket DMM
* Pen-type DMM
* 3V battery operation.
* Internal voltage doubler, ac-to-dc conversion Op Amp.
* Range Selection/Display Hold/Auto Power-off/Diode Test/Continuity
Check(Beeper) function
* Built-in CMOS bandgap reference.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2007.12.26
Page 1 of 17






SC7001Q Datasheet, Funktion
SC7001Q
PIN DESCRIPTION
PIN No.
1
2~27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
Symbol
BP1
SDP1~SDP26
LOWBAT
PWRMON
AUTO PWR1
AUTO PWR2
VDD
CINTH
CAUTO
ZERO(H)
RINTH(H)
RINTH(L)
A COM
REF IN
AC AMP OUT
AC AMP IN(-)
AC CKT IN (+)
CFILT OUT
CFILT IN
AC CKT IN(-)
A GND
NC
REF OUT
CINTL
CAUTO
ZERO(L)
RINTL(L)
RINTL(H)
R MEAS IN
D MEAS IN
I MEAS IN
V MEAS IN
1.1111MΩ
101.01KΩ
10.010 KΩ
1.0001KΩ
10.000MΩ
RREF COM
VSS
Description
Backplane 1 of LCD display
Segment display
Low battery check voltage input
Power monitor output
Auto power ON/OFF selection 1
Auto power ON/OFF selection 2
Supply voltage
High-speed A/D integrating capacitor connection
High-speed A/D auto zero capacitor connection
High-speed A/D integrating resistor connection(H)
High-speed A/D integrating resistor connection(L)
Analog circuit reference voltage
Reference voltage input
Built-in AC Amp output
Built-in AC Amp negative input
AC measurement position input
Output pin for external filter
Input pin for external filter
AC measurement negative input
Analog ground
No connection. This pin should be open in normal operation
Built –in bandgap reference voltage output
Low-speed A/D integrating capacitor connection
Low-speed A/D auto zero capacitor connection
Low-speed A/D integrating resistor connection (L)
Low-speed A/D integrating resistor connection (H)
Resistor and current measurement input
Diode and current of high range measurement pin
Input for current measurement
Input for voltage measurement
Voltage measurement ÷ 10 attenuator(326.0kΩ range)
Voltage measurement ÷ 100 attenuator(32.60kΩ range)
Voltage measurement ÷ 1000 attenuator(3.260kΩ range)
Voltage measurement ÷ 1000 attenuator(326.0Ω range)
Resistance measurement 3.260MΩ range
Attenuator resistor common connection
Negative supply voltage connection of analog circuit
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2007.12.26
Page 6 of 17

6 Page









SC7001Q pdf, datenblatt
LCD DISPLAY
SC7001Q
AC
D-H
DC
p-
p0
dp3 dp2 dp1
R-H
mV
MK
p33
TRIPLEXED LCD DISPLAY FORMAT
BP NO
BP2
BP3
BP1
IC
PIN 2
NO
3
79 p31 Ω
80 p32 V
1 p33 R-H
4
K
M
m
5
c0
b0
6 7 8 9 10 11 12 13 14
d0 p30 dp1 d1 p29 dp2 d2 p28 dp3
g0 e0 c1 g1 e1 c2 g2 e2 c3
a0 f0 b1 a1 f1 b2 a2 f2 b3
BP NO
BP2
BP3
BP1
IC
PIN 15 16 17 18 19 20 21 22 23 24 25 26 27
NO
79 d3
AC p27 p22 p21 p16 p15 p10 p9 p4 p3 p-
80 e3 D-H p26 p23 p20 p17 p14 p11 p8 p5 p2 p0
1 a3,
DC p25 p24 p19 p18 p13 p12 p7 p6 p1
g3
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2007.12.26
Page 12 of 17

12 Page





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