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Номер произв WS7106CPL
Описание 3 Digit LCD/LED Display A/D Converters
Производители Wing Shing Computer Components
логотип Wing Shing Computer Components логотип 



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WS7106CPL Даташит, Описание, Даташиты
3 1/2Digit LCD/LED Display A/D
Converters
WS7106 / WS7107
Features
Guaranteed Zero Reading for 0V Input on All Scales
True Polarity at Zero for Precise Null Detection
• True Differential Input and Reference, Direct Display
Drive- LCD WS7106, LED WS7107
• On Chip Clock and Reference
• Low Noise - Less Than 15µVP-P
• No Additional Active Circuits Required
• Low Power Dissipation - Typically Less Than 10mW
Ordering Information
Description
The WS7106 and WS7107 are high performance, low
power, 31/2 digit A/D converters. Included are seven seg-
ment decoders, display drivers, a reference, and a clock.
The WS7106 is designed to interface with a liquid crystal dis-
play (LCD) and includes a multiplexed backplane drive; the
WS 7107 will directly drive an instrument size light emitting
diode (LED) display.
The WS7106 and WS 7107 bring together a combination of
high accuracy, versatility, and true economy.True differential
inputs and reference are useful in all systems, but give the
desiger an uncommon advantage when measuring load
cells, strain gauges and other bridge type transducers.
Finally, the true economy of single power supply operation
(WS7106), enables a high performance panel meter to built
with the addition of only 10 passive compoents and a disply.
PART NO.
WS7106CPL
WS7107CPL
TEMP.
RANGE (oC)
0 to 70
0 to70
PACKAGE
40Ld PDIP
40Ld PDIP
PKG. NO.
E40.6
E40.6
Pinouts
WS7106CPL (PDIP)
WS7107CPL (PDIP)
V+
D1
C1
B1
(1’ s) A1
F1
G1
E1
D2
C2
B2
(10’ s)
A2
F2
E2
D3
B3
(100’ s)
F3
E3
(1000) AB4
(MINUS) POL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 OSC 1
39 OSC 2
38 OSC 3
37 TEST
36 REF HI
35 REF LO
34 CREF+
33 CREF-
32 COMMON
31 IN HI
30 IN LO
29 A-Z
28 BUFF
27 INT
26 V-
25 G2 (10’ s)
24 C3
23 A3 (100’ s)
22 G3
21 BP/GND
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com









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WS7106CPL Даташит, Описание, Даташиты
WS7106/WS710
7
Absolute Maximum Ratings
Thermal Information
Supply Voltage
Thermal Resistance (typical, Note 2)
θJA(/W)
WS7106, V+ to V-…………………………….15v
WS7107, V+ to GND…………………….……6V
WS7107, V_ to GND……………………. ….-9V
Analog Input Voltage (Either Input) (Note 1)V+ to V-
Reference Input Voltage (Either Input)V+ to V-
Clock Input
WS7106TEST to V+
WS7107GND to V+
PDIP Package……………………………………………. …… ………… 50
Maximum Junction Temperature…………………………………….. ………150
Maximum Storage Temperature Range………………….………..-65to 150
Operating Conditions
Temperature Range…………………………0to 70
CAUTION: Stresses above those listed in “absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
Of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Notes:
1. Input voltages may exceed the supply voltages provided the input current is limited to ±100µA
2. ΘJA Is measured with the component mounted on an evaluation PC on board in fee air.
Electrical specifications (Note 3)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
SYSTEM PERFORMACE
Zero Input Reading
VIN=0.0V, FULL Scale = 200mV
-000.0
Ratiometric Reading
VIN = VREF, VREF = 100mV
Rollover Error
Linearity
-VIN=+VIN=200mV
Difference in Reading for Equal Positive and
Negative Inputs Near Full Scale
Full Scale = 200mV or Full Scale = 2V Maximum
Deviation from Best Straight Line Fit (note 6)
Common Mode Rejection Ratio
VCM = 1V, VIN = 0V, Full Scale = 200mv(Note 6)
End Power Supply Character V+ Supply Current VIN = 0 (Does Not Include LED Current for WS7107
End Power Supply Character V- Supply Current WS7107 Only
COMMON Pin Analog Common Voltage
25kBetween Common and Positive Supply (With
Respect to + Supply)
Noise (PK-PK Value not exceeded 95% of time) VIN=0V Full Scale=200mV
Input Leakage Current
VIN=0V
Analog COMMON Temperature Coefficient
25K between Common and V+ 0-70
999
-1
-1
-
-
-
2.4
±000.0
999/1000
0.2
0.2
50
0.5
0.5
3.0
15
1
60
+000.0
1000
Digital
Reading
Digital
Reading
+1 Counts
+1 Counts
- μV/V
1.8 mA
1.8 mA
3.2 V
uVP-P
10 pA
75 ppm/
Scale Factor Temperature Coefficient
Zero Reading Drift
DISPLAY DRIVER WS7106 ONLY
Peak-to-Peak Segment Drive Voltage
Peak-to-Peak Backplane Drive Voltage
VIN=199mV 0-70Ext. ref. 0ppm/
VIN=0V-70
V+ = to V- = 9V (Note 5)
60 75 ppm/
0.2 1 uV/
4 5 6V
2









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WS7106CPL Даташит, Описание, Даташиты
Electrical Specifications (Continued) (Note 1)
WS7106 / WS7107
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
DISPLAY DRIVER WS7107 ONLY
Segment Sinking Current
(Except Pins 19 and 20)
V+ = 5V, Segment Voltage = 3V
58 -
mA
Pin 19 Only
10 16
-
mA
Pin 20 Only
47 -
mA
NOTES:
13. Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
2. Back plane drive is in phase with segment drive for 'off' segment, 180 degrees out of phase for 'on' segment. Frequency is 20
times conversion rate. Average DC component is less than 50mV
3. Not tested, Quaranteed by design.
Typical Applications and Test Circuits
+-
IN
9V
R1 R5
R3
R4
C4
C1
C5 C2 R2
C3
DISPLAY
WS7106
DISPLAY
C1 = 0.1µF
C2 = 0.47µF
C3 = 0.22µF
C4 = 100pF
C5 = 0.02µF
R1 = 24k
R2 = 47k
R3 = 100k
R4 = 1k
R5 = 1M
FIGURE 1. WS 7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
+5V + - -5V
IN
R1 R5
R3
R4
C4
C1
C5 C2 R2
C3
DISPLAY
WS7107
C1 = 0.1µF
C2 = 0.47µF
C3 = 0.22µF
C4 = 100pF
C5 = 0.02µF
R1 = 24k
R2 = 47k
R3 = 100k
R4 = 1k
R5 = 1M
DISPLAY
FIGURE 2. WS 7107 TEST CIRCUIT AND TYPICAL APPLICATION WITH LED DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
3










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