ICL7135C, TLC7135C

4 1/2DIGIT PRECISION

ANALOGTODIGITAL CONVERTERS

SLAS074D − DECEMBER 1986 − REVISED SEPTEMBER 2003

4

POST OFFICE BOX 655303

OPERATING CHARACTERISTICS

VCC + = 5 V, VCC − = 5 V, Vref = 1 V, fclock = 120 kHz, TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

αFS

Full-scale temperature coefficient (see Note 1)

VID = 2 V,

0

°C ≤ TA ≤ 70°C

5

ppm/

°C

EL

Linearity error

− 2 V

≤ VID ≤ 2 V

0.5

count

ED

Differential linearity error (see Note 2)

− 2 V

≤ VID ≤ 2 V

0.01

LSB

EFS

± Full-scale symmetry error (rollover error) (see Note 3)

VID = ± 2 V

0.5

1

count

Display reading with 0-V input

VID = 0,

0

°C ≤ TA ≤ 70°C −0.0000 ±0.0000 0.0000

Digital

Reading

Display reading in ratiometric operation

VID = Vref, TA = 25°C

0.9998

0.9999

1.0000

Digital

Display reading in ratiometric operation

0

°C ≤ TA ≤ 70°C

0.9995

0.9999

1.0005

Digital

Reading

NOTES:

1. This parameter is measured with an external reference having a temperature coefficient of less than 0.01 ppm/

°C.

2. The magnitude of the difference between the worst case step of adjacent counts and the ideal step.

3. Rollover error is the difference between the absolute values of the conversion for 2 V and − 2 V.

TIMING DIAGRAMS

D1

D2

D3

D4

D5

STROBE†

B1 − B8

201 Counts

200 Counts

D5

D1

D2

D3

D4

D5

BUSY†

End of Conversion

200 Counts

200 Counts

200 Counts

200 Counts

200 Counts

† Delay between BUSY going low and the first STROBE pulse is dependent upon the analog input.

Figure 1