參數(shù)資料
型號(hào): LTC2489CDE#PBF
廠商: Linear Technology
文件頁(yè)數(shù): 7/24頁(yè)
文件大?。?/td> 0K
描述: IC ADC 16BIT DELTA SIG 14-DFN
標(biāo)準(zhǔn)包裝: 91
位數(shù): 16
采樣率(每秒): 7.5
數(shù)據(jù)接口: I²C,串行
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 480µW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 14-WFDFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 14-DFN-EP(4x3)
包裝: 管件
輸入數(shù)目和類(lèi)型: 4 個(gè)單端,雙極;2 個(gè)差分,雙極
配用: DC1010A-B-ND - BOARD DELTA SIGMA ADC LTC2489
LTC2489
15
2489fa
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 I2C
delta-sigma ADCs from Linear Technology Corporation)
are used on the same I2C 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
Figure 8. Synchronize Multiple LTC2489s with a Global Address Call
7-BIT ADDRESS
S
R
W ACK
ACK
WRITE
Sr
P
READ
2489 F06
CONVERSION
ADDRESS
SLEEP
DATA OUTPUT
DATA INPUT
7-BIT ADDRESS
S
W ACK
WRITE (OPTIONAL)
P
2489 F07
CONVERSION
SLEEP
DATA INPUT
GLOBAL ADDRESS
SCL
SDA
S
W ACK
WRITE (OPTIONAL)
P
2489 F08
LTC2489
ALL LTC2489s IN SLEEP
CONVERSION OF ALL LTC2489s
DATA INPUT
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