Datasheet

12
LTC1850/LTC1851
18501f
UU
U
PI FU CTIO S
NOMINAL (V) ABSOLUTE MAXIMUM (V)
PIN NAME DESCRIPTION MIN TYP MAX MIN MAX
1 to 8 CH0 to CH7 Analog Inputs 0 V
DD
–0.3 V
DD
+ 0.3
9 COM Analog Input Common Pin 0 V
DD
–0.3 V
DD
+ 0.3
10 REFOUT 2.5V Reference Output 2.5 – 0.3 V
DD
+ 0.3
11 REFIN Reference Buffer Input 0 2.5 V
DD
–0.3 V
DD
+ 0.3
12 REFCOMP Reference Buffer Output 4.096 –0.3 V
DD
+ 0.3
13 GND Ground, Substrate Ground 0 –0.3 V
DD
+ 0.3
14 V
DD
Supply 4.75 5 5.25 –0.3 6
15 V
DD
Supply 4.75 5 5.25 –0.3 6
16 GND Ground 0 –0.3 V
DD
+ 0.3
17 DIFF
OUT
/S6 Single-Ended/Differential Output OGND OV
DD
–0.3 V
DD
+ 0.3
18 A2
OUT
/S5 MUX Address Output OGND OV
DD
–0.3 V
DD
+ 0.3
19 A1
OUT
/S4 MUX Address Output OGND OV
DD
–0.3 V
DD
+ 0.3
20 A0
OUT
/S3 MUX Address Output OGND OV
DD
–0.3 V
DD
+ 0.3
21 D9/S2 (LTC1850) Data Output OGND OV
DD
–0.3 V
DD
+ 0.3
21 D11/S2 (LTC1851) Data Output OGND OV
DD
–0.3 V
DD
+ 0.3
22 D8/S1 (LTC1850) Data Output OGND OV
DD
–0.3 V
DD
+ 0.3
22 D10/S1 (LTC1851) Data Output OGND OV
DD
–0.3 V
DD
+ 0.3
23 D7/S0 (LTC1850) Data Output OGND OV
DD
–0.3 V
DD
+ 0.3
23 D9/S0 (LTC1851) Data Output OGND OV
DD
–0.3 V
DD
+ 0.3
24 to 30 D6 to D0 (LTC1850) Data Outputs OGND OV
DD
–0.3 V
DD
+ 0.3
24 to 32 D8 to D0 (LTC1851) Data Outputs OGND OV
DD
–0.3 V
DD
+ 0.3
31 to 32 NC (LTC1850)
33 BUSY Converter Busy Output OGND OV
DD
–0.3 V
DD
+ 0.3
34 OGND Output Ground 0 –0.3 V
DD
+ 0.3
35 OV
DD
Output Supply 2.7 5 5.25 –0.3 6
36 M0 Mode Select Pin 0 0 V
DD
–0.3 10
37 PGA Gain Select Input 0 V
DD
–0.3 10
38 UNI/BIP Unipolar/Bipolar Input 0 V
DD
–0.3 10
39 to 41 A0 to A2 MUX Address Inputs 0 V
DD
–0.3 10
42 DIFF Single-Ended/Differential Input 0 V
DD
–0.3 10
43 WR Write Input, Active Low 0 V
DD
–0.3 10
44 RD Read Input, Active Low 0 V
DD
–0.3 10
45 CONVST Conversion Start Input, Active Low 0 V
DD
–0.3 10
46 CS Chip Select Input, Active Low 0 V
DD
–0.3 10
47 SHDN Shutdown Input, Active Low 0 V
DD
–0.3 10
48 M1 Mode Select Pin 1 0 V
DD
–0.3 10