LTC2990CMS View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2990CMS' PDF : 24 Pages View PDF
Applications Information
Table 3. STATUS Register
BIT NAME
b7
0
b6
VCC Ready
b5
V4 Ready
b4
V3, T2, V3 – V4 Ready
b3
V2 Ready
b2
V1, T1, V1 – V2 Ready
b1
TINT Ready
b0
Busy*
*In Repeat mode, Busy = 1 always
OPERATION
Always Zero
1 = VCC Register Contains New Data, 0 = VCC Register Read
1 = V4 Register Contains New Data, 0 = V4 Register Read
1 = V3 Register Contains New Data, 0 = V3 Register Data Old
1 = V2 Register Contains New Data, 0 = V2 Register Data Old
1 = V1 Register Contains New Data, 0 = V1 Register Data Old
1 = TINT Register Contains New Data, 0 = TINT Register Data Old
1= Conversion In Process, 0 = Acquisition Cycle Complete
Table 4. CONTROL Register
BIT NAME
OPERATION
b7
Temperature Format
Temperature Reported In; Celsius = 0, Kelvin = 1
b6
Repeat/Single
Repeated Acquisition = 0, Single Acquisition = 1
b5
Reserved
Reserved
b[4:3] Mode [4:3]
Mode Description
0
0
Internal Temperature Only (Reset Value)
0
1
T1, V1 or V1 – V2 Only per Mode [2:0]
1
0
T2, V3 or V3 – V4 Only per Mode [2:0]
1
1
All Measurements per Mode [2:0]
b[2:0] Mode [2:0]
Mode Description
0
0
0 V1, V2, TR2 (Reset Value)
0
0
1 V1 – V2, TR2
0
1
0 V1 – V2, V3, V4
0
1
1 TR1, V3, V4
1
0
0 TR1, V3 – V4
1
0
1 TR1. TR2
1
1
0 V1 – V2, V3 – V4
1
1
1 V1, V2, V3, V4
LTC2990
2990f
15
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