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參數資料
| 型號： | TPS2481PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封裝： | GREEN, PLASTIC, TSSOP-20 |
| 文件頁數： | 42/56頁 |
| 文件大小： | 1381K |
| 代理商： | TPS2481PW |
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www.ti.com
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
Data Output Registers
Shunt Voltage Register 01h (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 the Configuration Register (00h). When multiple sign bits are
present, they will all be the same value. Negative numbers are represented in two's complement format.
Generate the two's 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 = –320 mV:
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 Two’s 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 = ±320 mV (decimal = 32000, positive value hex = 7D00, negative value hex =
8300), and LSB = 10 mV.
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 = ±160 mV (decimal = 16000, positive value hex = 3E80, negative value hex =
C180), and LSB = 10 mV.
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 = ±80 mV (decimal = 8000, positive value hex = 1F40, negative value hex =
E0C0), and LSB = 10 mV.
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 = ±40 mV (decimal = 4000, positive value hex = 0FA0, negative value hex = F060),
and LSB = 10 mV.
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, Texas Instruments Incorporated
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