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参数资料
| 型号： | LTC1286IS8 |
| 厂商： | Linear Technology |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC CONV A/D SAMPLING 12BIT 8SOIC |
| 标准包装： | 100 |
| 位数： | 12 |
| 采样率（每秒）： | 12.5k |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1.25mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，单极 |
13
LTC1286/LTC1298
APPLICATION INFORMATION
WU
U
SAMPLE RATE (kHz)
0.1k
1
10
100
1000
1k
10k
100k
LT1286/98 G03
SUPPLY
CURRENT
(A)
TA = 25°C
VCC = VREF = 5V
fCLK = 200kHz
LTC1286
LTC1298
input becomes high impedance at the end of each conver-
sion leaving the CLK running to clock out the LSB first data
or zeroes (see Figures 1 and 2). If the CS is not running rail-
to-rail, the input logic buffer will draw current. This current
may be large compared to the typical supply current. To
obtain the lowest supply current, bring the CS pin to
ground when it is low and to supply voltage when it is high.
When the CS pin is high (= supply voltage), the converter
is in shutdown mode and draws only leakage current. The
status of the DIN and CLK input have no effect on supply
current during this time. There is no need to stop DIN and
CLK with CS = high; they can continue to run without
drawing current.
Minimize CS Low Time
In systems that have significant time between conver-
sions, lowest power drain will occur with the minimum CS
low time. Bringing CS low, transferring data as quickly as
possible, and then bringing it back high will result in the
lowest current drain. This minimizes the amount of time
the device draws power. After a conversion the ADC
automatically shuts down even if CS is held low (see
Figures 1 and 2). If the clock is left running to clock out
LSB-data or zero, the logic will draw a small current.
Figure 5 shows that the typical supply current with CS =
ground varies from 1
A at 1kHz to 35A at 200kHz. When
CS = VCC, the logic is gated off and no supply current is
drawn regardless of the clock frequency.
Shutdown
The LTC1286/LTC1298 are equipped with automatic shut-
down features. They draw power when the CS pin is low
and shut down completely when that pin is high. The bias
circuit and comparator powers down and the reference
ACHIEVING MICROPOWER PERFORMANCE
With typical operating currents of 250
A and automatic
shutdown between conversions, the LTC1286/LTC1298
achieves extremely low power consumption over a wide
range of sample rates (see Figure 4). The auto-shutdown
allows the supply curve to drop with reduced sample rate.
Several things must be taken into account to achieve such
a low power consumption.
Figure 4. Automatic Power Shutdown Between Conversions
Allows Power Consumption to Drop with Sample Rate.
1
2
3
4
CS
CLK
DATA (DIN/DOUT)
START
SGL/DIFF
ODD/SIGN
MSBF
B11
B10
MSBF BIT LATCHED
BY LTC1298
LTC1298 CONTROLS DATA LINE AND SENDS
A/D RESULT BACK TO MPU
MPU CONTROLS DATA LINE AND SENDS
MUX ADDRESS TO LTC1298
PROCESSOR MUST RELEASE
DATA LINE AFTER 4TH RISING CLK
AND BEFORE THE 4TH FALLING CLK
LTC1298 TAKES CONTROL OF DATA LINE
ON 4TH FALLING CLK
LTC1286/98 F03
Figure 3. LTC1298 Operation with DIN and DOUT Tied Together
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1286IS8#PBF | 功能描述:IC CONV A/D SAMPLING 12BIT 8SOIC 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 |
| LTC1286IS8#TR | 功能描述:IC ADC 12BIT SAMPL MCRPWR 8SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC1286IS8#TRPBF | 功能描述:IC CONV A/D SAMPLING 12BIT 8SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC1286IS8PBF | 制造商:Linear Technology 功能描述:ADC SAR 12.5ksps 12-Bit Serial SOIC8 |
| LTC1287-4ISW | 制造商:Linear Technology 功能描述: |
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