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參數資料
| 型號： | TLV5632IPW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | SERIAL INPUT LOADING, 3 us SETTLING TIME, 8-BIT DAC, PDSO20 |
| 封裝： | GREEN, PLASTIC, TSSOP-20 |
| 文件頁數： | 3/21頁 |
| 文件大小： | 511K |
| 代理商： | TLV5632IPW |
SERIAL CLOCK FREQUENCY AND UPDATE RATE
f
sclkmax +
1
t
whmin )
t
wlmin
+ 30 MHz
f
updatemax +
1
16 t
whmin )
t
wlmin
+ 1.95 MHz
DATA FORMAT
www.ti.com .................................................................................................................................................... SLAS269F – MAY 2000 – REVISED NOVEMBER 2008
Difference between DSP mode (MODE = N.C. or 0) and
C (MODE = 1) mode:
In C mode, FS needs to be held low until all 16 data bits have been transferred. If FS is driven high before
the 16th falling clock edge, the data transfer is cancelled. The DAC is updated after a rising edge on FS.
In DSP mode, FS needs to stay low for 20 ns and can go high before the 16th falling clock edge.
In DSP mode there needs to be one falling SCLK edge before FS goes low to start the write (DIN) cycle. This
extra falling SCLK edge has to happen at least 5 ns before FS goes low, tsu(CK-FS) ≥ 5 ns.
In C mode, the extra falling SCLK edge is not necessary. However, if it does happen, the extra negative
SCLK edge is not allowed to occur within 10 ns after FS goes HIGH to finish the WRITE cycle (tsu(FS-C17)).
The maximum serial clock frequency is given by:
The maximum update rate is:
Note, that the maximum update rate is just a theoretical value for the serial interface, as the settling time of the
DAC has to be considered also.
The 16-bit data word consists of two parts:
Address bits (D15…D12)
Data bits (D11…D0)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
A3
A2
A1
A0
Data
Ax: Address bits. See table.
REGISTER MAP
A3
A2
A1
A0
FUNCTION
0
DAC A
0
1
DAC B
0
1
0
DAC C
0
1
DAC D
0
1
0
DAC E
0
1
0
1
DAC F
0
1
0
DAC G
0
1
DAC H
1
0
CTRL0
1
0
1
CTRL1
1
0
1
0
Preset
1
0
1
Reserved
1
0
DAC A and B
1
0
1
DAC C and D
1
0
DAC E and F
1
DAC G and H
Copyright 2000–2008, Texas Instruments Incorporated
11
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