參數(shù)資料
型號(hào): LTC2447IUHF#TRPBF
廠商: Linear Technology
文件頁(yè)數(shù): 8/28頁(yè)
文件大?。?/td> 0K
描述: IC ADC 24BIT 8CH HI SPEED 38QFN
標(biāo)準(zhǔn)包裝: 2,500
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: -40°C ~ 85°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: 帶卷 (TR)
輸入數(shù)目和類型: 8 個(gè)單端,雙極;4 個(gè)差分,雙極
配用: DC846A-ND - BOARD DELTA SIGMA ADC LTC2447
LTC2446/LTC2447
16
24467fa
output 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 conversion 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 conver-
sion. 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.
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
24467 F05
CONVERSION
SLEEP
DATA OUTPUT
CONVERSION
TEST EOC
DON'T CARE
VCC
FO
REF67+
REF67
CH0
CH1
CH2
CH7
COM
REFG+
REFG
REF01+
REF01
SCK
SDI
SDO
CS
GND
28
29
30
11
10
35
24
23
8
9
12
22
7
38
37
1,4,5,6,31,32,33
36
34
USER SELECTABLE
REFERENCES
0.1V TO VCC
ANALOG
INPUTS
...
2
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
1
F
4.5V TO 5.5V
LTC2446
4-WIRE
SPI INTERFACE
BUSY
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/reference channel. If the data
APPLICATIO S I FOR ATIO
WU
U
Figure 5. External Serial Clock, Reduced Output Data Length
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