MAX11902 Datasheet, PDF (18/29 Pages) Maxim Integrated Products – Fully Differential SAR ADC

MAX11902
OUTPUT CODE
(OFFSET
BINARY)
111...111
111...110
111...101
FS - 1.5 x LSB
18-Bit, 1Msps, Low-Power,
Fully Differential SAR ADC
OUTPUT CODE
(TWO'S COMPLEMENT)
011...111
011...110
011...101
FS - 1.5 x LSB
000...010
000...001
000...000-2_{17-217+1-217+2}
ZERO SCALE
(ZS)
VIN = -VREF
2 x VREF
2¹⁷-2 2¹⁷-1 2¹⁷
VIN = (AIN+) - (AIN-)
DIFFERENTIAL
ANALOG INPUT
(LSB)
FULL SCALE
(FS)
VIN = +VREF
Figure 4. Ideal Transfer Characteristic
100...010
100...001
100...00-02_{17-217+1-217+2}
ZERO SCALE
(ZS)
VIN = -VREF
2 X VREF
2¹⁷-2 2¹⁷-1 2¹⁷
VIN = (AIN+) - (AIN-)
DIFFERENTIAL
ANALOG INPUT
(LSB)
FULL SCALE
(FS)
VIN = +VREF
Table 4. Transfer Characteristic
MIDCODE VALUE
FS - 1 LSB
Midscale + 1 LSB
Midscale
Midscale - 1 LSB
-FS + 1 LSB
-FS
DIFFERENTIAL ANALOG INPUT
FULL-SCALE RANGE = 6V (V)
2.99997711
0.00002289
0.00000000
-0.00002289
-2.99997711
-3.00000000
HEXADECIMAL
TWO’S COMPLEMENT
0x1FFFF
0x00001
0x00000
0x3FFFF
0x20001
0x20000
HEXADECIMAL OFFSET
BINARY
0x3FFFF
0x20001
0x20000
0x1FFFF
0x00001
0x00000
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