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參數資料
| 型號： | TLV2548MPWREP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封裝： | GREEN, PLASTIC, TSSOP-20 |
| 文件頁數： | 37/37頁 |
| 文件大小： | 915K |
| 代理商： | TLV2548MPWREP |
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SCLK
CS
FS
SDI
INT
EOC
SDO
ID14
ID13
ID12
ID15
OD11 OD10
OD9
OD4
OD3
1
2
3
4
7
13
16
1
12
ID15
14
15
OD2
OD1
OD0
5
6
www.ti.com
SLAS668 – OCTOBER 2009
Table 6. TLV2548 Conversion Mode (1) (2) (3) (continued)
CONVERSION
CFR
SAMPLING
OPERATION
MODE
D(6,5)
TYPE
Repeated conversions from a selected channel
CS or FS to start sampling/conversion
One INT generated after FIFO is filled up to the threshold
Normal
Host must serve INT by either 1) (FIFO read) reading out all of the FIFO
Repeat
01
contents up to the threshold, then repeat conversions from the same selected
channel or 2) writing another command(s) to change the conversion mode. If
the FIFO is not read when INT is served, it is cleared.
Same as normal sampling except CSTART starts each sampling and
Extended
conversion when CS is high.
One conversion per channel from a sequence of channels
CS or FS to start sampling/conversion
Normal
One INT generated after FIFO is filled up to the threshold
Sweep
10
Host must serve INT by (FIFO read) reading out all of the FIFO contents up to
the threshold, then write another command(s) to change the conversion mode.
Same as normal sampling except CSTART starts each sampling and
Extended
conversion when CS is high.
Repeated conversions from a sequence of channels
CS or FS to start sampling/conversion
One INT generated after FIFO is filled up to the threshold
Normal
Host must serve INT by either 1) (FIFO read) reading out all of the FIFO
Repeat sweep
11
contents up to the threshold, then repeat conversions from the same selected
channel or 2) writing another command(s) to change the conversion mode. If
the FIFO is not read when INT is served it is cleared.
Same as normal sampling except CSTART starts each sampling and
Extended
conversion when CS is high.
Timing Diagrams
The timing diagrams can be categorized into two major groups: non-conversion and conversion. The
non-conversion cycles are read and write (configuration). None of these cycles carry a conversion. Conversion
cycles are those four modes of conversion.
Read Cycle (Read FIFO or Read CFR)
Read CFR Cycle
The read command is decoded in the first four clocks. SDO outputs the contents of the CFR after the fourth
SCLK. This command works only when the device is programmed in the single shot mode (mode 00).
Figure 2. TLV2548 Read CFR Cycle (FS active)
Copyright 2009, Texas Instruments Incorporated
9
Product Folder Link(s): TLV2548-EP
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