SC7001Q
3
3/4
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
QFP-80-14×20-0.8
Test/Continuity Check(Beeper). The built-in high temperature-stable CMOS
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
Part no.
SC7001Q
Package
QFP-80-14X20-0.8
FEATURES
* Auto range function
--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.
* 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.
APPLICATIONS
∗
Hand-held DMM
* Pocket DMM
* Pen-type DMM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.12.26
Page 1 of 17
SC7001Q
ABSOLUTE MAXIMUM RATING
(note1)
Characteristics
Supply Vltage (V
DD
to A COM)
Supply Vltage (V
SS
to A COM)
Digital Input Voltage
Analog Input Voltage
Digital Output Current
Analog Output Current
Beep Output Current
LCD Output Current
Operating Temperature Range
Storage Temperature Range
Symbol
V
DD
V
SS
DV
IN
AV
IN
DI
OUT
AI
OUT
I
BEEP
I
LCD
T
OPR
T
STG
Value
4
-4
-0.3~V
DD
+0.3
V
SS
-0.3~V
DD
+0.3
-1~+1
-3~+3
-1~+1
-0.1~+0.1
0~+50
-40~+125
Unit
V
V
V
V
mA
mA
mA
mA
°C
°C
Note: 1. All voltage are measure with respect to the A COM, unless otherwise noted. The separate A GND, D
GND and A COM should always be wired together.
RECOMMENDED OPERATING CONDITIONS
Characteristics
Supply voltage
Supply voltage
Digital input “L” voltage
Digital input “H” voltage
Reference input voltage
LCD-ON drive voltage
LCD-OFF drive voltage
Operating temperature range
Clock frequency
Symbol
V
DD
V
SS
DV
IL
DV
IH
REF IN
V
LCD-ON
V
LCD-OFF
T
opr
f
0
32.768
2.5
1.3
50
V
DD
-0.5
0.32768
Value
Min.
2.4
-2.4
Typ.
3.0
-3.0
Max.
3.6
-3.6
0.5
Unit
V
V
V
V
V
V
V
°C
KHz
ELECTRICAL CHARACTERISTICS
(T
amb
=25°C, V
DD
=3V, REF IN=0.32768V, f =32.768KHz,unless
otherwise specified)
Characteristics
Supply current
Power-off supply current
Digital input “H” current
Digital input “L” current
Measuring pin leakage
Digital input “H” voltage
Digital input “L” voltage
Symbol
I
DD
I
PO
I
IH
I
IL
I
LEAK
V
IH
V
IL
Test conditions
At DCV mode, V
IN
=0mV with
voltage doubler operated
At power off(down)
V
IH
=3V
V
IL
=0V
-1.0
-10
-10
2.5
0.5
+10
0
Min.
Typ.
Max.
600
4.0
+1.0
Unit
μA
μA
μA
μA
pA
V
V
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.12.26
Page 3 of 17
SC7001Q
(Continued)
Characteristics
Built-in reference voltage output
range
Built-in reference voltage output
voltage coefficient
Battery check internal comparator
off-set voltage
LCD-on drive voltage
LCD-off drive voltage
DCV measurement
DCA measurement
Linearity
ACV measurement
ACA measurement
Resistance measurement
Diode test
Option measurement
Beep out frequency
Continuity check value
AC-to-DC conversion Amp gain
O.L display count
Symbol
REF OUT
Test conditions
Min.
1.1
-2000
-60
2.5
Typ.
1.28
Max.
1.4
Unit
V
ΔREF
OUT V
DD
=2.4~3.6V
V
BATT
V
LCD-ON
V
LCD-OFF
ERR-DCV
ERR-DCA
ERR-ACV
ERR-ACA
ERR-R
ERR-D
ERR-OPT
f
BEEP
RCC
AV
D O.L
Input range = -1~1v
Except 32.6MΩ
32.6MΩ range
Full-scale =2.0V
On pin 47 voltage
+2000 ppm/V
+60
mV
V
1.3
V
-0.08
-0.15
-0.1
-0.2
-0.08
-0.5
-0.2
-0.08
4095
18.3
70
3240
4096
+0.08 %/FS
+0.15 %/FS
+0.1
+0.2
%/FS
%/FS
+0.08 %/FS
+0.5
+0.2
%/FS
%/FS
+0.08 %/FS
4097
20.7
Hz
Ω
dB
3290 count
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.12.26
Page 4 of 17
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