參數(shù)資料
型號: LTC2489CDEPBF
廠商: Linear Technology Corporation
英文描述: 16-Bit 2-/4-Channel ADC with Easy Drive Input Current Cancellation and I2C Interface
中文描述: 16位2-/4-Channel ADC,具有易于驅(qū)動(dòng)的輸入電流取消和I2C接口
文件頁數(shù): 15/24頁
文件大?。?/td> 341K
代理商: LTC2489CDEPBF
LTC2489
15
2489f
7-BIT ADDRESS
7-BIT ADDRESS
S
R
W ACK
ACK
WRITE
Sr
P
READ
2489 F06
CONVERSION
CONVERSION
ADDRESS
SLEEP
DATA OUTPUT
DATA INPUT
7-BIT ADDRESS
S
W ACK
WRITE (OPTIONAL)
P
2489 F07
CONVERSION
CONVERSION
SLEEP
DATA INPUT
Figure 6. Write, Read, Start Conversion
Figure 7. Start a New Conversion Without Reading Old Conversion Result
APPLICATIONS INFORMATION
Figure 6 shows a cycle which begins with a data Write,
a repeated Start, followed by a Read and concluded with
a Stop command. The following conversion begins after
all 24 bits are read out of the device or after a Stop com-
mand. The following conversion will be performed using
the newly programmed data.
Discarding a Conversion Result and Initiating a New
Conversion with Optional Write
At the conclusion of a conversion cycle, a write cycle
can be initiated. Once the write cycle is acknowledged, a
Stop command will start a new conversion. If a new input
channel is required, this data can be written into the device
and a Stop command will initiate the next conversion (see
Figure 7).
Synchronizing Multiple LTC2489s with a Global
Address Call
In applications where several LTC2489s (or other I
2
C
delta-sigma ADCs from Linear Technology Corporation)
are used on the same I
2
C bus, all converters can be syn-
chronized through the use of a global address call. Prior
to issuing the global address call, all converters must have
completed a conversion cycle. The master then issues a
Start, followed by the global address 1110111, and a write
request. All converters will be selected and acknowledge
the request. The master then sends a write byte (optional)
followed by the Stop command. This will update the chan-
nel selection (optional) and simultaneously initiate a start
of conversion for all delta-sigma ADCs on the bus (see
Figure 8). In order to synchronize multiple converters
GLOBAL ADDRESS
SCL
SDA
S
W ACK
WRITE (OPTIONAL)
P
2489 F08
LTC2489
LTC2489
LTC2489
ALL LTC2489s IN SLEEP
CONVERSION OF ALL LTC2489s
DATA INPUT
Figure 8. Synchronize Multiple LTC2489s with a Global Address Call
相關(guān)PDF資料
PDF描述
LTC2489CDETRPBF 16-Bit 2-/4-Channel ADC with Easy Drive Input Current Cancellation and I2C Interface
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LTC2493 24-Bit 2-/4-Channel ADC with Easy Drive Input Current Cancellation and I2C Interface
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