参数资料
型号: DC1010A-B
厂商: Linear Technology
文件页数: 6/24页
文件大小: 0K
描述: BOARD DELTA SIGMA ADC LTC2489
软件下载: QuikEval System
设计资源: DC1010A Design File
DC1010A Schematic
标准包装: 1
系列: Easy Drive™, QuikEval™
ADC 的数量: 1
位数: 16
采样率(每秒): 7.5
数据接口: I²C,串行
已用 IC / 零件: LTC2489
已供物品:
相关产品: LTC2489IDE#TRPBF-ND - IC ADC 16BIT DELTA SIG 14-DFN
LTC2489CDE#TRPBF-ND - IC ADC 16BIT DELTA SIG 14-DFN
LTC2489CDE#PBF-ND - IC ADC 16BIT DELTA SIG 14-DFN
LTC2489IDE#PBF-ND - IC ADC 16BIT DELTA SIG 14-DFN
LTC2489
14
2489fa
Operation Sequence
The LTC2489 acts as a transmitter or receiver, as shown
in Figure 4. The device may be programmed to select
an input channel, differential or single-ended mode, and
channel polarity.
Table 4. Address Assignment
CA1
CA0
ADDRESS
LOW
0010100
LOW
HIGH
0010110
LOW
FLOAT
0010101
HIGH
LOW
0100110
HIGH
0110100
HIGH
FLOAT
0100111
FLOAT
LOW
0010111
FLOAT
HIGH
0100101
FLOAT
0100100
Continuous Read
In applications where the input channel does not need to
change for each cycle, the conversion can be continuously
performed and read without a write cycle (see Figure 5).
The input channel remains unchanged from the last value
written into the device. If the device has not been writ-
ten to since power up, the channel selection is set to the
default value of CH0 = IN+, CH1 = IN. At the end of a read
operation, a new conversion automatically begins. At the
conclusion of the conversion cycle, the next result may
be read using the method described above. If the conver-
sion cycle is not concluded and a valid address selects
the device, the LTC2489 generates a NAK signal indicating
the conversion cycle is in progress.
Continuous Read/Write
Once the conversion cycle is concluded, the LTC2489 can
be written to and then read from using the Repeated Start
(Sr) command.
APPLICATIONS INFORMATION
Figure 4. Conversion Sequence
Figure 5. Consecutive Reading with the Same Input/Configuration
S
ACK
DATA
Sr
DATA TRANSFERRING
P
7-BIT ADDRESS
R/W
2489 F04
CONVERSION
SLEEP
DATA INPUT/OUTPUT
7-BIT ADDRESS
SS
RR
ACK
READ
PP
2489 F05
CONVERSION
SLEEP
DATA OUTPUT
DATA INPUT
SLEEP
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