ICL7135CAI ,4 1/2 Digit ADC with Multiplexed BCD OutputsELECTRICAL CHARACTERISTICS (Note I)
N' ' +5v. vi =, -w, TA = 25%). Clock Frequency Sst 101 a Rea ..
ICL7135CJI ,4 Digit A/D Converter with Multiplexed BCD OutputsELECTRICAL CHARACTERISTICS (Note 1)
(V+ - +5V, v- -- -tiV, TA -- 25''C, Clock Frequency Set tor ..
ICL7135CPI ,4 1/2 Digit, BCD Output, A/D ConverterICL7135®Data Sheet October 25, 2004 FN3093.314 / Digit, BCD Output, A/D Converter
ICL7135CPIZ , 4 1/2 Digit, BCD Output, A/D Converter
ICL7135CQI ,4 Digit A/D Converter with Multiplexed BCD Outputsfeatures high impedance
differential inputs, nearly ideal differential linearity, true
ratiometri ..
ICL7136 ,3 1/2 Digit LCD/LED, Low Power Display, A/D Converters with Overrange Recoveryapplications, changing only the passivecomponents.Pinouts(PDIP) (MQFP)TOP VIEW TOP VIEWV+ 1 40 OSC ..
IDT72141L35P , CMOS PARALLEL-TO-SERIAL FIFO 2048 X 9 4096 X 9
IDT72142L50P , CMOS SERIAL-TO-PARALLEL FIFO 2048 x 9 4096 x 9
IDT72142L50P , CMOS SERIAL-TO-PARALLEL FIFO 2048 x 9 4096 x 9
IDT7216L20J , 16 x 16 PARALLEL CMOS MULTIPLIERS
IDT7216L35J , 16 x 16 PARALLEL CMOS MULTIPLIERS
IDT7216L45J , 16 x 16 PARALLEL CMOS MULTIPLIERS
ICL7135CAI
4 1/2 Digit ADC with Multiplexed BCD Outputs
19-5041 Rev o, 1987
2fllALii] Jie!: l] 2filA]
4% Digit Jil/O Con verter with
Multiplexed BCD Outputs
General Description
The Maxim ICL7135 is a high precision monolithic 41/2
digit A/D converter. Dual slope conversion reliability is
combined with :1 in 20,000 count accuracy and a
2.0000V full scale capability. It features high impedance
differential inputs, nearly ideal differential linearity, true
ratiometric operation, auto zero and auto-polarity. The
multiplexed BCD outputs and digit drivers provide easy
interface to external display drivers like the Maxim
lCM7211A. The only other external components needed
to make precision DVM/DPMs are a reference and a
clock. For more comglex systems the BCD outputs are
enhanced by STROBE, OVERRANGE, UNDERRANGE,
RUN/HOLD and BUSY lines providing easy interface to
microprocessors and UARTs. This interfacing capability
makes the ICL7135 an ideal device for use in microproc-
essor based data acquisition and control systems.
The ICL7135 has auto-zero accuracy better than 101W,
zero drift of 0.5pV/°C, input bias current of 10pA max.
and rollover error of less than 1 count.
- - Applications
This device is used in a wide range of measurement ap-
plications involving the manipulation and display of ana-
log data:
Pressure
Voltage
Resistance
Temperature
Weight
Current
Material Thickness
- - - Jin Configuration
_Features
. Improved 2nd Source
(See our "Maxim AdvantaneTM'' Page 3)
o i20,000 Count Resolution
6 Guaranteed i 1 Count accuracy
. Over-range, under-range signals for auto-range
capability
. Easy interface to UARTs and ptPs
. TTL compatible, Multiplexed BCD outputs
o 1 rue differential input. Zero reading guaranteed
for 0 volt input
. True polarity at zero for precise null detection
. Monolithic CMOS design
-_" Ordering Information
PART TEMP. RANGE PACKAGE
ICL7135CJl ty'C to 70''C 28 Lead CERDIP
ICL7135CPl 0°C to 70''C 28 Lead Plastic DIP
ICL7135COl ty'C to 70°C 28 Lead Plastic chip carrier
ICL7135C/D 0°C to 70°C Dice
Typical Operating Circuit
V-3 1 28 UNDERRANGE
REFERENCE: 2 27 "utWERRANGE
ANALOG COMMONr 3 26 toSrTmoB-E
INT OUT: 4 25 WRIH
AZ INC, 5 24 :DIGITAL GND
BUFF OUTc 6 23 UPOL
REF. CAP- c 7 MAW“ 22 WCLOCK IN
REF. CAP+C 8 ICL7'35 21 IBUSY
IN L0: 9 20 J(LSD) DI
IN HIC 10 19 _oD2
V t C 11 18 n D3
(MSD) D5 C 12 17 304
(L58) Blu 13 16 ,1 (MSB) B8
B2r 14 15 J84
NOTE: All packages have the same pinout,
OCT,,-'"-,-,]
-ty- m BRT LirdrtTrqfrsrt1ErWr.r' b1UAl J2!ie.',
D2 n} m "
D3 -- TCD- D3 - - -
, fcrct - C
ram!" "aD--, m mm r TmuL/n I
05 ICM7272 t I _
i _ LED DISPLAY
Ba m I
The "Maxim Advantage""signilies an upgraded quality level. At no additional cost we offer a second-source device that is subject to the
following: 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/JXI/l/I
Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at .
93:11 770!
[612.7735
4% Digit Jil/O Can verfer with
Multiplexed Bithtp Outputs
ABSOLUTE MAXIMUM RATINGS
Power Dissipation (Note 2)
CERDIP Package ........................... 1000mW
Plastic Package ............................. 800mW
Operating Temperature .................... 0°C to + 70''C
Storage Temperature ................. - 65°C to + 160°C
Lead Temperature (Soldering, 10 sec) .............. 300''C
Supply Voltage [C. ............................... + 6V
................................ - 9V
Analog Input Volvtage (either input) (Note 1) ...... V + to V -
Reference Input Voltage (either input) ........... V + to V -
Clock Input ................................. Gnd to V +
Note l.. Input voltages may exceed the supply voltages provided the input current is limited to +100WA.
Note 2: Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ICL7135 ELECTRICAL CHARACTERISTICS (Note 1)
N' = +5V, v- = -5V, TA = 25''C, Clock Frequency Set for 3 Reading/Sec
CHARACTERISTICS SYMBOL CONDITIONS MIN TYP MAX UNITS
A Zero Input Reading VIN == 0.0V - 0.0000 t 0.0000 + 0.0000 Digital
N Full Scale = V2.000V Reading
A Ratiometric Reading (2) VIN + 0.9998 + 0.9999 + 1.0000 Digital
(L) Full Scale = VR2. ooov Reading
G Linearity over i Full Scale Digital
(errorof reading from -2V s l/m s +2V 0.5 1 Count
best straight line) Error
Differential Linearity , i
(difference between worse -2V S VIN s. +2V .01 _ LSB i
case step of adjacent counts t
and ideal step) A
Rollover error (Difference in Dtgttal
reading for equal positive & -VIN Fr, +V.N 2T. 2V 0.5 1 Count
negative voltage near full scale) Error t
(Note 1) Noise (P-P value not en " = 0V '
(Note 2) exceeded 95% of time) Full Scale = 2. 000V 15 “V J‘
Leakage Current at Input IILK VIN = 0V 1 10 pA i
Zero Reading Drift VIN-- = 0V 0.5 2 ,qu (
ty' S TA S 70°C
Scale FactorTemperature TC VIN = +2V 1
Coefficient (3) ty' s; TA s 70''C 2 5 ppm 'C i,'
(ext. ref. 0 ppm/°C) Q
VINH 2.8 2.2 v
- VINL 1.6 0.8
INPUTS Clock In, Run/Hold IINL VIN = 0 0.02 0.1 mA
IINH VIN = + 5V 0.1 10 "A
0 All Outputs VOL IOL = 1.6mA 0.25 0.40 v
U Be, Ba, B4, 88 VOH IOH = -ImA 2.4 4.2 V
T DI, De. Da D4, D5
D P BUSY, ‘STR'o' BE VOH 10H = -10HA 4.9 4.99 v
I U OVER-RANGE, UNDER-RANGE
G I POLARITY _
J S + 5V Supply Range V + + 4 + 5 + 6 3 v
L g - 5V Supply Range v- -3 - 5 - 8 t V
P + 5V Supply Current H fc = o 1.1 3.0 T mA
L -5V Supply Current I- fc = 0 0.8 3.0
Y Power Dissipation Capacitance CPD vs. Clock Freq 40 pF
Clock Clock Freq. (Note 4) DC 2000 1200 kHz
Note 1: Tested in 4% digit (20,000 count) circuit shown in Fig. 1, clock frequency 120kHz.
Note 2: Tested with a low dielectric absorption integrating capacitor. See Component Selection Section.
Note 3: The temperature range can be extended to + 70'C and beyond as long as the auto-zero and reference capacitors are increased to absorb the higher
leakage of the ICL7135.
Note 4: This specification relates to the clock frequency range over which the ICL7135 will correctly perform its various functions. See "Max Clock Frequency"
below for limitations on the clock frequency range in a system.
The electrical characteristics above are a reproduction of a portion of tntersil's copyrighted (1983/1984) data book. This information does not constitute any
representation by Maxim that /nters//'s products will perform in accordance with these specifications. The "Electrical Characteristics Table" along with the
dersct/ptivts excerpts from the original manufacturer's data sheet have been included in this data sheet solely for comparative purposes.
2 - - - - --
- IVl/JXI/VI
