ICL7107CJL ,3 Digit A/D ConverterGeneral Description
The Maxim CL7106 and ICL7107 are monolithic analog
to digital converters. T ..
ICL7107CJL ,3 Digit A/D ConverterApplications
. Monolithic CMOS design
_orderirtg Informa tion
volve the measurement and di ..
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ICL7107CJL-ICL7107CQH
3 Digit A/D Converter
- General Description
The Maxim |CL7106 and ICL7107 are monolithic analog
to digital converters. They have very high input imped-
ances and require no external display drive circuitry. On-
board active components include polarity and digit driv-
ers, segment decoders, voltage reference and a clock
circuit. The ICL7106 will directly drive a non-multiplexed
liquid crystal display (LCD) whereas the ICL7107 will di-
rectly drive a common anode light emitting diode (LED)
display.
Versatility and accuracy are inherent features of these
converters. The dual-slope conversion technique auto-
matically rejects interference signals common in industri-
al environments. The true differential input and reference
are particularly useful when making ratiometric measure-
ments (ohms or bridge transducers). Maxim has added a
zero-integrator phase to the |CL7106 and |CL7107, elimi-
nating overrange hangover and hysteresis effects. Final-
ly, these devices offer high accuracy by lowering rollover
error to less than one count and zero reading drift to less
than 1p.V/°C.
- A pplica tions
These devices can be used in a wide range of digital
panel meter applications. Most applications, however, in-
volve the measurement and display of analog data:
Pressure Conductance
Voltage Current
Resistance Speed
Temperature Material Thickness
2AlALe4ll3ClLAM]
3V2 Digit A/D Con verter
Fea tures
. Improved 2nd Source! (See 3rd page for
"Maxim Advantage""')
. Guaranteed first reading recovery from
overrange
. On board Display Drive Capability-no external
circuitry required
LCD-ICL7106
LED-ICL7107
. High Impedance CMOS Differential Inputs
. Low Noise (< 15pV p-p) without hysteresis or
overrange hangover
. Clock and Reference On-Chlp
. True Differential Reference and Input
. True Polarity Indication tor Precision Null
Applications
. MonolithictlM9S design
-oreterirtg Informa tion
Display
ANALOG
ndAXlAA
ICL7106
-UZIL'IL‘I
tUOL.l
—4||}—J
FULL SCALE
2 000 V
200.0 mV
TO ANALOG
COMMON {932)
1000 V
100.0 mV
PART TEMP. RANGE PACKAGE
|CL71060PL 0°C to +70°C 40 Lead Plastic DIP -
ICL7106CJL 0''C to + 70°C 40 Lead CERDIP
|CL71OGCOH ty'C to + 70°C 44 Lead Plastic Chip Carrier
ICL7106C/D 0°C to f 70''C Dice
|CL7107CPL (Y'C to 6 70''C 40 Lead Plastic DIP
|CL7107CJL 0''C to +70°C 40 Lead CERDIP
ICL7107CQH 0°C to + 70''C 44 Lead Plastic Chip Carrier
ICL7107C/D 0°C to + 70'C Dice
Pin Configura tion
V‘ E OSC l
D1 E OSC 2
C1 E OSC 3
l'S B1 u: TEST
A1 LE REF HI
Cl E Rgr LO
Gl E C_RLF
EI LE MAXIM CREF
D2 LE ICL7106 COMMON
C2 E ICL7107 IN HI
ID'S B2 E IN LO
A2 E A/Z
l F2 E BUFF
E2 IE INT
D3 Ff Cl TENS)
100 5 F3 IT C3
o " A3 100S
1000'5-AB4 " GS__J
POL BP(7106)GND(7107)
(MINUS SIGN)
t See last page to: Plastic: Chip Gamer Pm Conhgurahon
The "Maxim Advantage""signines an upgraded quality level. At no additional cost we offer a second-source devtce that IS subject to the
IoI/owmg: guaranteed performance over temperature along with tighter test specifications on many key parameters: and device
enhancements, when needed, that result In improved performance without changing the functionality.
lVl/J Xl/VI
- Maxim Integrated Products 1
' 10.11/90“ 79/
,ICL7106/7107
3% Digit A/D Con verter
ABSO LUTE MAXIMUM RATINGS
Sup Iy Voltage Power Dissipation (Note 2)
2Nflt V+ to v- ............................. 15V Plastic Package .......................... 1000mW
ICL7107, V+ to GND __................-... +6V Operating Temperature ................. 0°C to +70°C
ICL7107, V to GND ......l....l- -9V Storage Temperature ................ -65''C to +160°C
Analog Input Voltage (either input)(Note 1) ....... V+ to v- Lead Temperature (Soldering, 60 sec) ......... +300° C
Reference Input Voltage (either input) ........... V+ to v-
Clock Input
ICL7106 ................................ TEST to V+
|CL7107 ................................ GNDtoV+
Note 1: Input voltages may exceed the supply voltages, provided the input current is limited to "- 100p.A.
Note 2: DIssipation rating assumes device is mounted with all leads soldered to printed circuit board
Stresses above those listed under "Absolute Maximum Ratmgs" may cause permanent damage to the device. These are stress ratrngs only and iunctlonal
opalatlon of the device at these or any other conditions above those indicated in the aperational sections ot the 'pscifications is not implied. Exposure to absolute
mammum rating conditions lor extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS (Note 3)
CHARACTERISTICS CONDITIONS MIN TYP MAX UNITS
Zero Input Reading VIN = 0.0V H)00.0 :0000 10000 Digital Readmg
Full Scale = 200.0mV
Ratiornetrc Reading VIN 1 VREF 999 999/1000 1000 Digital Reading
VREF - 100mV
Rollover Error {Difference In *VIN = WIN = 200.0mV 1 td el Counts
reading tor equal positive and
negative reading near Full Scale)
Linearly (Max deVIalIon from Full scale = 200mV -1 t.2 +1 Counts
best straight line ft or full scale = 2.000V
Common Mode Rejection Ratio VCM = ‘1V,VIN = OV, 50 wNN
Note 41 Full Scale = 200 OmV
Noise IPk-Pk value not exceeded VIN = 0V 15 PV
95% of tlmei Full Scale = 200.0mV
’Input Leakage Current ___-__ VIN - 0 1 10 pA
Zero Reading ant VIN = O 0.2 1 pV/OC
0° < TA < 70''C
Scale Factor Temperature VIN = 199.0mV 1 5 ppm/c'C
Coefficient J' < TA < 70''C
(Ext. Ref. 0ppm/°C)
V'Supply Current iDoes not VIN - 0 J8 1.8 mA
Include LED current for 7107)
( supply current 7107 only" 0.6 1.8 mA
Analog Common Voltage (With 25kftbetween Common & 2.4 2.8 3.2 V
respect to Pos. Supply) Pos. Supply
Temp. Coeff of Analog Common 25ktt between Common & 80 ppm/°C
‘Wlth respect to Pos. Supply) Pos. Supply
7106 ONLY V' to V‘ - 9V 4 5 6 V
Pk-Pk Segment Drive Voltage.
Pk-Pk Backplane Drive Voltage
Note 51
7107 ONLY V‘ f 5 0V 5 8.0 mA
Segment Sinking Current Segment voltage = 3V
Exceptpm19)
IPin 19 only) 10 16 mA
Note 3: Unless otherwise noted, specifications apply to both the 7106 and 7107 at TA-- 25''C, (CLOCK = 48kHz. 7106 is tested In the circuit of Figure 1. 7107 Is
tested in the circuit oi Figure 2.
Note 4: Rater lo "Differential Input" discussion.
Note 5: Backplane drive is in phase with segment drive for "off" segment. 180" out of phase for “on" segment. Frequency is 20 times conversion rate. Average DC
component is less than 50mV.
The electrical characteristics above are a reproduction of a portion of Intersil's copyrighted (1983/1984) data book. This information does not constitute any
representation by Maxim that mters/l's products will perform m accordance with these specifications. The "Eiectrica, Characteristics Table" along with the
descriptive excerpts from the original manufacturer's data sheet have been Included in Mis data shes! solely for comparative purposes.
7 - ,,/VI/lXI/Vl
