參數(shù)資料
型號(hào)： TMP512AIRSAT
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC16
封裝： GREEN, PLASTIC, QFN-16
文件頁(yè)數(shù)： 36/61頁(yè)
文件大?。?/td> 1758K
代理商： TMP512AIRSAT
SBOS491A
– JUNE 2010 – REVISED MAY 2011
Shunt Voltage Register 04h (Read-Only)
The Shunt Voltage Register stores the current shunt voltage reading, VSHUNT. Shunt Voltage Register bits are
shifted according to the PGA setting selected in Configuration Register 1 (00h). When multiple sign bits are
present, they will all be the same value. Negative numbers are represented in twos complement format.
Generate the twos complement of a negative number by complementing the absolute value binary number and
adding 1. Extend the sign, denoting a negative number by setting the MSB = '1'. Extend the sign to any
additional sign bits to form the 16-bit word.
Example: For a value of VSHUNT = –320mV:
1. Take the absolute value (include accuracy to 0.01mV)==
> 320.00
2. Translate this number to a whole decimal number ==
> 32000
3. Convert it to binary==
> 111 1101 0000 0000
4. Complement the binary result : 000 0010 1111 1111
5. Add 1 to the Complement to create the twos complement formatted result ==
> 000 0011 0000 0000
6. Extend the sign and create the 16-bit word: 1000 0011 0000 0000 = 8300h (Remember to extend the sign to
all sign-bits, as necessary based on the PGA setting.)
At PGA =
÷8, full-scale range = ±320mV (decimal = 32000, positive value hex = 7D00, negative value hex =
8300), and LSB = 10
μV.
BIT #
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
BIT
SIGN
SD14_8
SD13_8
SD12_8
SD11_8
SD10_8
SD9_8
SD8_8
SD7_8
SD6_8
SD5_8
SD4_8
SD3_8
SD2_8
SD1_8
SD0_8
NAME
POR
0
VALUE
At PGA =
÷4, full-scale range = ±160mV (decimal = 16000, positive value hex = 3E80, negative value hex =
C180), and LSB = 10
μV.
BIT #
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
BIT
SIGN
SD13_4
SD12_4
SD11_4
SD10_4
SD9_4
SD8_4
SD7_4
SD6_4
SD5_4
SD4_4
SD3_4
SD2_4
SD1_4
SD0_4
NAME
POR
0
VALUE
At PGA =
÷2, full-scale range = ±80mV (decimal = 8000, positive value hex = 1F40, negative value hex = E0C0),
and LSB = 10
μV.
BIT #
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
BIT
SIGN
SD12_2
SD11_2
SD10_2
SD9_2
SD8_2
SD7_2
SD6_2
SD5_2
SD4_2
SD3_2
SD2_2
SD1_2
SD0_2
NAME
POR
0
VALUE
At PGA =
÷1, full-scale range = ±40mV (decimal = 4000, positive value hex = 0FA0, negative value hex = F060),
and LSB = 10
μV.
BIT #
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
BIT
SIGN
SD11_1
SD10_1
SD9_1
SD8_1
SD7_1
SD6_1
SD5_1
SD4_1
SD3_1
SD2_1
SD1_1
SD0_1
NAME
POR
0
VALUE
Copyright
2010–2011, Texas Instruments Incorporated
41
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