參數(shù)資料
型號: LTC2445CUHF
廠商: Linear Technology
文件頁數(shù): 9/28頁
文件大小: 0K
描述: IC ADC 24BIT HI SPEED 38QFN
標(biāo)準(zhǔn)包裝: 52
位數(shù): 24
采樣率(每秒): 8k
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 40mW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 38-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 38-QFN(5x7)
包裝: 管件
輸入數(shù)目和類型: 8 個單端,雙極;4 個差分,雙極
LTC2444/LTC2445/
LTC2448/LTC2449
17
2444589fb
As described above, CS may be pulled LOW at any time in
order to monitor the conversion status on the SDO pin.
Typically, CS remains LOW during the data output state.
However, the data output state may be aborted by pulling
CS HIGH anytime between the fifth falling edge and the
32nd falling edge of SCK, see Figure 5. On the rising edge
of CS, the device aborts the data output state and imme-
diately initiates a new conversion. Thirteen serial input
data bits are required in order to properly program the
speed/resolution and input channel. If the data output
APPLICATIO S I FOR ATIO
WU
U
Figure 5. External Serial Clock, Reduced Output Data Length
CS
SCK
(EXTERNAL)
SDI
SDO
BUSY
12345
6
15
MSB
BIT 28 BIT 27 BIT 26 BIT 25
SIG
BIT 29
“0”
BIT 30
EOC
Hi-Z
BIT 31
2444 F06
CONVERSION
SLEEP
DATA OUTPUT
CONVERSION
TEST EOC
DON'T CARE
VCC
FO
REF+
REF
CH0
CH7
CH8
CH15
COM
SCK
SDI
SDO
CS
GND
28
35
29
30
8
15
16
23
7
38
37
1,4,5,6,31,32,33,39
36
34
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG
INPUTS
2
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
1
F
4.5V TO 5.5V
LTC2448
4-WIRE
SPI INTERFACE
BUSY
DON'T CARE
sequence is aborted prior to the 13th rising edge of SCK,
the new input data is ignored, and the previously selected
speed/resolution and channel are used for the next con-
version cycle. This is useful for systems not requiring all
32 bits of output data, aborting an invalid conversion
cycle or synchronizing the start of a conversion. If a new
channel is being programmed, the rising edge of CS must
come after the 14th falling edge of SCK in order to store
the data input sequence.
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