ICL7135CSLASHD datasheet(3/13 Pages) MAXIM

3 / 13 page

Note 1: Tested in 41/2 digit (20,000 count) circuit shown in Figure 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 “Clock Frequency” below for limitations on the clock frequency range in a system.

Note 5: +5V Supply current for fc ≠ 0 is I+ = I+ (fc = 0) + CPD x 5V x fc.

Note 6: All pins are designed to withstand electrostatic discharge (ESD) levels in excess of 2000V. (Test circuit per MIL Std 883,

Method 3015.1)

● Guaranteed 2mA Max Supply Current

● Key Parameters Guaranteed Over Temperature

● Significantly Improved ESD Protection (Note 6)

● Low Noise

This device conforms to the Absolute Maximum Ratings on adjacent page.

Specifications below satisfy or exceed all ‘’tested” parameters on adjacent page.

(V+ = +5V, V- = -5V, TA = +25°C, Clock Frequency Set for 3 Reading/Sec)

● Maxim Quality and Reliability

ICL7135

41/2 Digit A/D Converter with

Multiplexed BCD Outputs

www.maximintegrated.com

Maxim Integrated │ 3

Absolute Maximum Ratings:

Electrical Characteristics

ANALOG

(Note 1)

(Note 2)

CHARACTERISTICS

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Zero Input Reading

VIN = 0.0V, Full Scale = 2.000V

0° ≤ TA ≤ +70°C

-0.0000

±0.0000

-0.0000

Digital

Reading

Ratiometric Reading (Note 2)

VIN = VREF, Full Scale = 2.000V

TA = 25°C

0° ≤ TA ≤ +70°C

Digital

Reading

+0.9998

+0.9999

+1.0000

+0.9995 +0.9999 +1.0005

Linearity Over ± Full Scale

(Error of Reading from Best

Straight Line)

-2V ≤ VIN ≤ +2V

0.5

Digital

Count Error

Differential Linearity (Difference

Between Worst-Case Step of

Adjacent Counts and Ideal Step)

-2V ≤ VIN ≤ +2V

.01

LSB

Rollover Error (Difference in

Reading for Equal Positive and

Negative Voltage Near Full Scale)

-VIN = +VIN ≈ +2V

0.5

Digital

Count Error

Noise (P-P value not exceeded

95% of time)

VIN = 0V, Full Scale = 2.000V

µV

Leakage Current at Input

IILK

VIN = 0V

TA = 25°C

0° ≤ TA ≤ +70°C

250

Zero Reading Drift

VIN = 0V

0° ≤ TA ≤ +70°C

µV/°C

Scale Factor Temperature

Coefficient (3)

VIN = +2V

0° ≤ TA ≤ +70°C

ppm/°C

(ext. ref. 0ppm/°C)

INPUTS

Clock In, Run/Hold

VINH

0° ≤ TA ≤ +70°C

2.8

2.2

VINL

0° ≤ TA ≤ +70°C

1.6

0.8

IINL

VIN = 0V

0° ≤ TA ≤ +70°C

0.02

0.1

IINH

VIN = +5V

0° ≤ TA ≤ +70°C

0.1

µA

DIGITAL

OUTPUTS

All Outputs

VOL

IOL = 1.6mA

0.25

0.40

B1, B2, B4, B8

D1, D2, D3, D4, D5

VOH

IOH = -1mA

2.4

4.2

BUSY, STROBE ,

OVER-RANGE,

UNDER-RANGE POLARITY

VOH

IOH = -10µA

4.9

4.99

SUPPLY

+5V Supply Range

V+

-5V Supply Range

V-

-3

-5

-8

+5V Supply Current

I+

fC = 0

TA = 25°C

0° ≤ TA ≤ +70°C

1.1

2.0

3.0

-5V Supply Current

I-

fC = 0

TA = 25°C

0° ≤ TA ≤ +70°C

0.8

2.0

3.0

Power Dissipation Capacitance

CPD

(Note 5)

CLOCK

Clock Frequency (Note 4)

2000

1200

kHz

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