Datasheet

Table 4. Transfer Characteristic
Figure 4. Ideal Transfer Characteristic
MIDCODE VALUE
DIFFERENTIAL ANALOG INPUT
FULL-SCALE RANGE = 6V (V)
HEXADECIMAL
TWO’S COMPLEMENT
HEXADECIMAL OFFSET
BINARY
FS - 1 LSB 2.99997711 0x1FFFF 0x3FFFF
Midscale + 1 LSB 0.00002289 0x00001 0x20001
Midscale 0.00000000 0x00000 0x20000
Midscale - 1 LSB -0.00002289 0x3FFFF 0x1FFFF
-FS + 1 LSB -2.99997711 0x20001 0x00001
-FS -3.00000000 0x20000 0x00000
111...111
111...110
111...101
000...000
000...001
000...010
OUTPUT CODE
(OFFSET
BINARY)
V
IN
= (AIN+) - (AIN-)
DIFFERENTIAL
ANALOG INPUT
(LSB)
FS - 1.5 x LSB
2 x V
REF
FULL SCALE
(FS)
V
IN
= +V
REF
ZERO SCALE
(ZS)
V
IN
= -V
REF
-2
17
-2
17
+1
-2
17
+2
2
17
2
17
-12
17
-2
011...111
011...110
011...101
100...000
100...001
100...010
OUTPUT CODE
(TWO'S COMPLEMENT)
V
IN
= (AIN+) - (AIN-)
DIFFERENTIAL
ANALOG INPUT
(LSB)
FS - 1.5 x LSB
-2
17
-2
17
+1
-2
17
+2
2
17
2
17
-12
17
-2
2 X V
REF
FULL SCALE
(FS)
V
IN
= +V
REF
ZERO SCALE
(ZS)
V
IN
= -V
REF
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Maxim Integrated │ 18
MAX11903 18-Bit, 1.6Msps, Low-Power,
Fully Differential SAR ADC