Datasheet

LTC2991
19
2991fd
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applicaTions inForMaTion
Table 3. STATUS LOW (00h) Register
BIT NAME OPERATION
b7 V8, T4, V7 – V8 Ready 1 = V8 Register Contains New Data, 0 = V8 Register Data Old
b6 V7, T4, V7 – V8 Ready 1 = V7 Register Contains New Data, 0 = V7 Register Data Old
b5 V6, T3, V5 – V6 Ready 1 = V6 Register Contains New Data, 0 = V6 Register Data Old
b4 V5, T3, V5 – V6 Ready 1 = V5 Register Contains New Data, 0 = V5 Register Data Old
b3 V4, T2, V3 – V4 Ready 1 = V4 Register Contains New Data, 0 = V4 Register Data Old
b2 V3, T2, V3 – V4 Ready 1 = V3 Register Contains New Data, 0 = V3 Register Data Old
b1 V2, T1, V1 – V2 Ready 1 = V2 Register Contains New Data, 0 = V2 Register Data Old
b0 V1, T1, V1 – V2 Ready 1 = V1 Register Contains New Data, 0 = V1 Register Data Old
Table 4. STATUS HIGH, CHANNEL ENABLE (01h) Register (Default 00h)
BIT NAME R/W OPERATION
b7 V7 and V8, V7 – V8, T
R4
Enable R/W 1 = V7 and V8, or V7 – V8 or T4 Enabled
0 = V7 and V8, or V7 – V8 or T4 Disabled (Default)
b6 V5 and V6, V5 – V6, T
R3
Enable R/W 1 = V5 and V6, or V5 – V6 or T3 Enabled
0 = V5 and V6, or V5 – V6 or T3 Disabled (Default)
b5 V3 and V4, V3 – V4, T
R2
Enable R/W 1 = V3 and V4, or V3 – V4 or T2 Enabled
0 = V3 and V4, or V3 – V4 or T2 Disabled (Default)
b4 V1 and V2, V1 – V2, T
R1
Enable R/W 1 = V1 and V2, or V1 – V2 or T1 Enabled
0 = V1 and V2, or V1 – V2 or T1 Disabled (Default)
b3 T
INTERNAL
V
CC
Enable R/W 1 = T
INTERNAL
and V
CC
Enabled
0 = T
INTERNAL
and V
CC
Disabled (Default)
b2 BUSY R 1 = A Conversion Is in Process
0 = Sleep Mode (Default)
b1 T
INTERNAL
R 1 = T
INTERNAL
Register Contains New Data
0 = T
INTERNAL
Register Data Old (Default)
b0 V
CC
R 1 = V
CC
Register Contains New Data
0 = V
CC
Register Data Old (Default)
Table 5. V1, V2 and V3, V4 CONTROL (06h) Register (Default 00h)
BIT NAME OPERATION
b7 V3, V4 Filt 1 = Filter Enabled, 0 = Filter Disabled for V3 and V4, V3 – V4 or T2 (Default)
b6 T
R2
Kelvin 1 = Kelvin, 0 = Celsius for T2 (Default)
b5 V3, V4 Temperature 1 = Temperature, 0 = Voltage (Per b4 Setting) (Default)
b4 V3, V4 Differential 1 1 = Differential (V3 – V4) and V3 Single-Ended
0 = Single-Ended Voltage (V3 and V4) (Default)
b3 V1, V2 Filt 1 = Filter Enabled, 0 = Filter Disabled for V1 and V2, V1 – V2 or T1 (Default)
b2 T
R1
Kelvin 1 = Kelvin, 0 = Celsius for T1 (Default)
b1 V1, V2 Temperature 1 = Temperature, 0 = Voltage (Per b0 Setting) (Default)
b0 V1, V2 Differential 1 = Differential (V1 – V2) and V1 Single-Ended
0 = Single-Ended Voltage (V1 and V2) (Default)