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TLV5618ACD Datasheet(PDF) 11 Page - Texas Instruments

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Part # TLV5618ACD
Description  2.7-V TO 5.5-V LOW-POWER DUAL 12-BIT DIGITAL-TO-ANALOG CONVERTER WITH POWER DOWN
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TLV5618ACD Datasheet(HTML) 11 Page - Texas Instruments

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TLV5618A
2.7-V TO 5.5-V LOW-POWER DUAL 12-BIT
DIGITAL-TO-ANALOG CONVERTER WITH POWER DOWN
SLAS230H – JULY 1999 – REVISED JULY 2002
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
data format
The 16-bit data word for the TLV5618A consists of two parts:
D Program bits
(D15..D12)
D New data
(D11..D0)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
R1
SPD
PWR
R0
MSB
12 Data bits
LSB
SPD: Speed control bit
1
→ fast mode
0
→ slow mode
PWR: Power control bit
1
→ power down
0
→ normal operation
On power up, SPD and PWD are reset to 0 (slow mode and normal operation)
The following table lists all possible combinations of register-select bits:
register-select bits
R1
R0
REGISTER
0
0
Write data to DAC B and BUFFER
0
1
Write data to BUFFER
1
0
Write data to DAC A and update DAC B with BUFFER content
1
1
Reserved
The meaning of the 12 data bits depends on the register. If one of the DAC registers or the BUFFER is selected,
then the 12 data bits determine the new DAC value:
examples of operation
D Set DAC A output, select fast mode:
Write new DAC A value and update DAC A output:
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
1
1
0
0
New DAC A output value
The DAC A output is updated on the rising clock edge after D0 is sampled.
D Set DAC B output, select fast mode:
Write new DAC B value to BUFFER and update DAC B output:
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
0
New BUFFER content and DAC B output value
The DAC A output is updated on the rising clock edge after D0 is sampled.
D Set DAC A value, set DAC B value, update both simultaneously, select slow mode:
1.
Write data for DAC B to BUFFER:
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
1
New DAC B value
2.
Write new DAC A value and update DAC A and B simultaneously:
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
1
0
0
0
New DAC A value


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