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参数资料
型号： DAC8571IDGKR
厂商： TEXAS INSTRUMENTS INC
元件分类： DAC
英文描述： SERIAL INPUT LOADING, 13 us SETTLING TIME, 16-BIT DAC, PDSO8
封装： GREEN, PLASTIC, MSOP-8
文件页数： 14/30页
文件大小： 825K
代理商： DAC8571IDGKR
www.ti.com
EXAMPLES (A0 TIED TO GND, VDD = 5 V)
DAC8571
SLAS373A – DECEMBER 2002 – REVISED JULY 2003
C<5>
C<4>
C<2>
0
1
0
MS and LS bytes represent temporary and DAC register data
1
0
MS and LS bytes represent I2C data that is discarded
1
0
MS and LS bytes represent I2C data that is discarded
1
MS and LS bytes represent temporary and DAC register data
EXAMPLE 1: Write 1/4 scale to DAC8571
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0001 0000
ACK
0100 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = 1.25 V
EXAMPLE 2: Switch DAC8571 to fast settling mode
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0001 0001
ACK
0010 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = 0 V
EXAMPLE 3: Switch DAC8571 back to low power mode
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0001 0001
ACK
0000 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = 0 V
EXAMPLE 4: Power-down DAC8571 with Hi-Z output
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0001 0001
ACK
1100 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = Hi-Z
EXAMPLE 5: Power-down DAC8571 with 1K output impedance to ground
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0001 0001
ACK
0100 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = 0 V
EXAMPLE 6: Power-down DAC8571 with 100K output impedance to ground
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0001 0001
ACK
1000 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = 0 V
EXAMPLE 7: Store full scale data in temporary register
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0000 0000
ACK
1111 1111
ACK
1111 1111
ACK
STOP
Previous output voltage is valid
EXAMPLE 8: Update DAC8571 with the data previously stored in the temporary register
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 1000
ACK
0010 0000
ACK
XXXX XXXX
ACK
XXXX XXXX
ACK
STOP
Previous output voltage is valid
New Vout valid
EXAMPLE 9: Broadcast a powerdown command to all DAC8571s on the I2C bus
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 0000
ACK
0011 0101
ACK
1100 0000
ACK
0000 0000
ACK
STOP
Previous output voltage is valid
Vout = Hi-Z
EXAMPLE 10: Broadcast update. All DAC8571s on the I2C bus update synchronously with the contents of their temporary
registers
ADDRESS <7...0>
C<7...0>
M<7...0>
L<7...0>
START
1001 0000
ACK
0011 0000
ACK
XXXX XXXX
ACK
XXXX XXXX
ACK
STOP
Previous output voltage is valid
New Vout valid
21
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