参数资料
型号: LTC2487CDE#PBF
厂商: Linear Technology
文件页数: 13/32页
文件大小: 0K
描述: IC ADC 16BIT DELTA SIG 14-DFN
标准包装: 91
位数: 16
采样率(每秒): 15
数据接口: I²C,串行
转换器数目: 1
功率耗散(最大): 800µW
电压电源: 单电源
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 14-WFDFN 裸露焊盘
供应商设备封装: 14-DFN-EP(4x3)
包装: 管件
输入数目和类型: 4 个单端,双极;2 个差分,双极
配用: DC1010A-C-ND - BOARD DELTA SIGMA ADC LTC2487
LTC2487
20
2487fd
Figure 6. Conversion Sequence
Figure 7. Consecutive Reading with the Same Input/Conguration
Table 6. 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
APPLICATIONS INFORMATION
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
conversion cycle is not concluded and a valid address
selects the device, the LTC2487 generates a NAK signal
indicating the conversion cycle is in progress.
Continuous Read/Write
Once the conversion cycle is concluded, the LTC2487 can
be written to and then read from using the Repeated Start
(Sr) command.
Figure 8 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 command.
The following conversion will be performed using the newly
programmed data. In cases where the same speed (1x/2x
mode), rejection frequency (50Hz, 60Hz, 50Hz and 60Hz)
and gain is used but the channel is changed, a Stop or
Repeated Start may be issued after the rst byte (channel
selection data) is written into the device.
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 or conversion conguration is required, this data
S
ACK
DATA
Sr
DATA TRANSFERRING
P
7-BIT ADDRESS
R/W
2487 F06
CONVERSION
SLEEP
DATA INPUT/OUTPUT
7-BIT ADDRESS
SS
RR
ACK
READ
PP
2487 F07
CONVERSION
ADDRESS
SLEEP
DATA OUTPUT
DATA INPUT
SLEEP
Operation Sequence
The LTC2487 acts as a transmitter or receiver, as shown
in Figure 6. The device may be programmed to perform
several functions. These include input channel selection,
measure the internal temperature, selecting the line fre-
quency rejection (50Hz, 60Hz, or simultaneous 50Hz and
60Hz), a 2x speed mode and gain.
Continuous Read
In applications where the input channel/conguration does
not need to change for each cycle, the conversion can be
continuously performed and read without a write cycle
(see Figure 7). The conguration/input channel remains
unchanged from the last value written into the device. If
the device has not been written to since power up, the
conguration is set to the default value. At the end of a
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LTC2488CDE#PBF 功能描述:IC ADC 16BIT DELTA SIG 14-DFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率(每秒):1M 数据接口:串行,SPI? 转换器数目:1 功率耗散(最大):- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘(4x4) 包装:Digi-Reel® 输入数目和类型:8 个单端,单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6
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