參數(shù)資料
型號(hào): LTC2487IDEPBF
廠商: Linear Technology Corporation
英文描述: 16-Bit 2-/4-Channel ADC with PGA, Easy Drive and I2C Interface
中文描述: 16位2-/4-Channel型ADC PGA巡回賽,輕松驅(qū)動(dòng)和I2C接口
文件頁(yè)數(shù): 21/32頁(yè)
文件大小: 612K
代理商: LTC2487IDEPBF
LTC2487
2487fa
Figure 10. Synchronize Multiple LTC2487s with a Global Address Call
Figure 8. Write, Read, Start Conversion
Figure 9. Start a New Conversion Without Reading Old Conversion Result
7-BIT ADDRESS
CONVERSION
CONVERSION
ADDRESS
SLEEP
DATA OUTPUT
DATA INPUT
7-BIT ADDRESS
S
R
W ACK
ACK
WRITE
Sr
P
READ
7-BIT ADDRESS
CONVERSION
CONVERSION
SLEEP
DATA INPUT
S
W ACK
WRITE (OPTIONAL)
P
2487 F09
GLOBAL ADDRESS
SCL
SDA
ALL LTC2487s IN SLEEP
CONVERSION OF ALL LTC2487s
DATA INPUT
S
W ACK
WRITE (OPTIONAL)
P
2487 F10
LTC2487
LTC2487
LTC2487
can be written into the device and a Stop command will
initiate the next conversion (see Figure 9).
Synchronizing Multiple LTC2487s with a Global
Address Call
In applications where several LTC2487s (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) converter configuration (optional)
and simultaneously initiate a start of conversion for all
delta-sigma ADCs on the bus (see Figure 10). In order
to synchronize multiple converters without changing
the channel or configuration, a Stop may be issued after
acknowledgement of the global write command. Global
read commands are not allowed and the converters will
NAK a global read request.
applicaTions inForMaTion
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