SLAS074D − DECEMBER 1986 − REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
OPERATING CHARACTERISTICS
V
CC+
= 5 V, V
CC
− = 5 V, V
ref
= 1 V, f
clock
= 120 kHz, T
A
= 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS MIN TYP MAX UNIT
α
FS
Full-scale temperature coefficient (see Note 1) V
ID
= 2 V, 0°C ≤ T
A
≤ 70°C 5 ppm/°C
E
L
Linearity error −2 V ≤ V
ID
≤ 2 V 0.5 count
E
D
Differential linearity error (see Note 2) −2 V ≤ V
ID
≤ 2 V 0.01 LSB
E
FS
± Full-scale symmetry error (rollover error) (see Note 3) V
ID
= ± 2 V 0.5 1 count
Display reading with 0-V input V
ID
= 0, 0°C ≤ T
A
≤ 70°C −0.0000 ± 0.0000 0.0000
Digital
Reading
Display reading in ratiometric operation
V
ID
=
V
ref
, T
A
= 25°C 0.9998 0.9999 1.0000
Digital
Display reading in ratiometric operation
0°C ≤ T
A
≤ 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
D5D1D2D3D4D5
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
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