
ISL26320, ISL26321, ISL26322, ISL26323, ISL26324, ISL26325, ISL26329
15
FN8273.1
September 5, 2013
FIGURE 27. PRECISION VOLTAGE REFERENCE FOR +5V SUPPLY
1
2
3
4
8
7
6
5
DNC
VIN
COMP
GND
DNC
VOUT
TRIM
0.1F
VDD
1F (SEE VOLTAGE REFERENCE INPUT)
2.5V
VREF
0.1F
BULK
+
5V
ISL21090
ISL2631X
ISL2632X
FIGURE 28. VOLTAGE REFERENCE FOR +2.7V TO +3.6V, OR FOR +5V SUPPLY
VDD
1F (SEE VOLTAGE REFERENCE INPUT)
VREF
0.1F
BULK
+
+2.7V TO +3.6V
ISL21010
GND
VIN
VOUT
1
2
3
0.1F
1.25, 2.048 OR 2.5V
OR +5V
ISL2631X
ISL2632X
FIGURE 29. VOLTAGE REFERENCE FOR ISL26320/ISL26323 IS DERIVED FROM VDD
VDD
1F (SEE VOLTAGE REFERENCE INPUT)
BULK
+2.7V TO +5V
ISL26320
ISL26323
TABLE 1. OUTPUT CODES - DIFFERENTIAL
Input Voltage
Two’s Complement (12-bit)
>(VFS-1.5 LSB)
7FF
VFS-1.5 LSB
7FF
...
7FE
-0.5 LSB
000
…
FFF
-VFS +0.5 LSB
801
…
800
NOTE: VFS in the table above equals the voltage between AIN+ and AIN-.
Differential full scale is equal to 2* VREF.
TABLE 2. OUTPUT CODES - SINGLE-ENDED
Input Voltage
Binary (12 bit)
>AIN-1.5 LSB
FFF
AIN-1.5 LSB
FFF
…
FFE
0.5 LSB
001
…
000
<0.5 LSB
000
NOTE: Single-ended full scale is equal to VREF.