VOLTAGE (V)
0 TO +20
ANALOG INPUT
RANGE
±10
±5
±2.5
0 TO +10
0 TO +5
+VFS
–VFS
FSR
+10
–10
20
+5
–5
10
+2.5
–2.5
5
+20
0
+10
0
+5
0
20
10
5
TRANSITION CODES
(Hexadecimal)
TRANSITION VALUES (V)
For 16-bit Resolution (Reading all 16 bits)
FFFEH to FFFFH
7FFFH to 8000H
0000H to 0001H
+9.999542
–152.5µV
–9.999847
305µV
+4.999771
–38µV
+2.499886
+19.999542
+9.99971
+4.999924
+76µV
+4.999886
+2.499962
+38µV
–19µV
–2.499962
38µV
+9.999847
+152µV
305µV
–4.999924
153µV
LSB (FSR/216
)
153µV
76µV
For 15-bit Resolution (Reading all 16 bits, Ignoring DB0)
FFFDH to 7FFEH
7FFEH to 8000H
0000H to 0002H
+9.999084
–305µV
+4.999542
–153µV
+2.499771
–76µV
+19.999084
+9.999625
+305µV
+9.999542
+4.999847
+152µV
+4.999771
+2.499924
+76µV
–9.999695
610µV
–4.999847
305µV
–2.499924
153µV
LSB (FSR/215
)
610µV
305µV
153µV
For 14-bit Resolution (Reading all 16 bits, Ignoring DB0 and DB1)
FFFCH to FFFDH
7FFDH to 8000H
0000H to 0004H
+9.99817
–610µV
–9.999390
1221µV
+4.99908
–305µV
–4.999694
610µV
+2.49954
–153µV
–2.499847
305µV
+19.99817
+9.99939
+610µV
+9.99908
+4.999695
+305µV
+4.99954
+2.499847
+153µV
LSB (FSR/214
)
1221µV
610µV
305µV
TABLE II. Transition Values for Calibration.
+VCC
270kΩ
4
27
28
1
Potentiometers
10kΩ to 100kΩ
Gain Adjust
R1
10V Range
–VCC
Comparator
0.01µF
+VCC
R2
20V Range
Comparator Input
1.8MΩ
Analog
Input
2
–VCC
BPO
26
Analog Common
FIGURE 6. Unipolar Input Configuration with Gain and Offset Adjust Connections.
+VCC
270kΩ
4
Potentiometers
10kΩ to 100kΩ
Gain Adjust
R1
10V Range
27
28
1
–VCC
Comparator
0.01µF
+VCC
R2
20V Range
Comparator Input
1.8MΩ
Analog
Input
2
–VCC
BPO
26
Analog Common
FIGURE 7. Bipolar Input Configuration with Gain and Offset Adjust Connections.
9
®
ADC700
BB [ BURR-BROWN CORPORATION ]
