LTC2991CMS View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2991CMS' PDF : 32 Pages View PDF
APPLICATIONS INFORMATION
Table 11. Temperature Measurement MSB Data Register Format
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DV*
X
X
D12
D11
D10
D9
D8
*Data valid is set when a new result is written into the register. Data valid is cleared
when this register is addressed (read) by the I2C interface.
X Unused
Table 12. Temperature Measurement LSB Data Register Format
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
D7
D6
D5
D4
D3
D2
D1
D0
Table 13. Diode Voltage Measurement MSB Data Register Format
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DV*
X
X
D12
D11
D10
D9
D8
*Data valid is set when a new result is written into the register. Data valid is cleared
when this register is addressed (read) by the I2C interface.
X Unused
Table 14. Diode Voltage Measurement LSB Data Register Format
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
D7
D6
D5
D4
D3
D2
D1
D0
Table 15. PWM Threshold Register Format
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
D7
D6
D5
D4
D3
D2
D1
D0
D7:D0 = PWM[8:1], bit 0 is located in the PWM, VCC and TINT CONTROL Register (Table 7)
Table 16. Conversion Formats
VOLTAGE FORMATS
SIGN
BINARY VALUE D[13:0]
Single-Ended
LSB = 305.18µV = 2.5/213
0
11111111111111
0
10110011001101
0
01111111111111
0
00000000000000
1
11110000101001
Differential
LSB = 19.075µV = 2.5/217
0
11110101101111
0
10000010001111
0
00000000000000
1
01111101110001
1
00001010010001
VCC
LSB
=
=
Result + 2.5V
305.18µV = 2.5/213
0
10110011001101
0
10000000000000
0
00001010001111
For more information www.linear.com/LTC2991
LTC2991
VOLTAGE
>5
3.5000
2.5000
0.0000
–0.3000
0.300
0.159
0.0000
–0.159
–0.300
VCC = 6.0
VCC = 5.0
VCC = 2.7
2991ff
21
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