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參數(shù)資料
| 型號： | ADS1286U |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 17/17頁 |
| 文件大小： | 0K |
| 描述： | IC 12-BIT SAMPLING A/D 8-SOIC |
| 產(chǎn)品培訓模塊： | Data Converter Basics |
| 標準包裝： | 75 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 20k |
| 數(shù)據(jù)接口： | 串行，SPI?，SSI |
| 轉換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個差分，單極 |
| 產(chǎn)品目錄頁面： | 890 (CN2011-ZH PDF) |
9
ADS1286
CS/SHDN
D
OUT
DCLOCK
t
DATA
t
SUCS
t
CSD
t
CYC
t
CONV
POWER
DOWN
t
SMPL
Note: (1) After completing the data transfer, if further clocks are applied with CS
LOW, the ADC will output LSB-First data then followed with zeroes indefinitely.
B11
(MSB)
B10 B9
B8
B7
B6
B5
B4
B3
B2
B1 B0(1)
NULL
BIT
HI-Z
B11 B10
B9
B8
NULL
BIT
CS/SHDN
D
OUT
DCLOCK
t
CONV
t
DATA
t
SUCS
t
CYC
POWER DOWN
t
SMPL
Note: (2) After completing the data transfer, if further clocks are applied with CS
LOW, the ADC will output zeroes indefinitely.
t
DATA: During this time, the bias current and the comparator power down and the reference input
becomes a high impedance node, leaving the CLK running to clock out LSB-First data or zeroes.
B11
(MSB)
B10 B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
NULL
BIT
HI-Z
B5
B6
B7
B8
B9
B10 B11
(2)
t
CSD
leaving the DCLOCK running to clock out the LSB first
data or zeroes. If the CS input 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.
SERIAL INTERFACE
The ADS1286 communicates with microprocessors and other
external digital systems via a synchronous 3-wire serial inter-
face. DCLOCK synchronizes the data transfer with each bit
being transmitted on the falling DCLOCK edge and captured
on the rising DCLOCK edge in the receiving system. A falling
CS initiates data transfer as shown in Figure 1. After CS falls,
the second DCLOCK pulse enables DOUT. After one null bit,
the A/D conversion result is output on the DOUT line. Bringing
CS high resets the ADS1286 for the next data exchange.
MICROPOWER OPERATION
With typical operating currents of 250
A and automatic
shutdown between conversions, the ADS1286 achieves ex-
tremely low power consumption over a wide range of
sample rates (see Figure 2). The auto-shutdown allows the
supply current to drop with sample rate.
SHUTDOWN
The ADS1286 is equipped with automatic shutdown fea-
tures. The device draws power when the CS pin is LOW and
shuts down completely when the pin is HIGH. The bias
circuit and comparator powers down and the reference input
becomes high impedance at the end of each conversion
1000
100
10
1
Supply
Current
(
A)
0.1k
1k
10k
100k
Sample Rate (kHz)
T
A = 25°C
V
CC = 5V
V
REF = 5V
f
CLK = 16 fSAMPLE
FIGURE 2. Automatic Power Shutdown Between Conver-
sions Allows Power Consumption to Drop with
Sample Rate.
FIGURE 1. ADS1286 Operating Sequence.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADS1286U | 制造商:BURR-BROWN 功能描述:12BIT ADC UPOWER SERIAL SMD 1286 |
| ADS1286U/2K5 | 功能描述:模數(shù)轉換器 - ADC 12-Bit Micro Power Sampling RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1286U/2K5G4 | 功能描述:模數(shù)轉換器 - ADC 12-Bit Micro Power Sampling RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1286UA | 功能描述:模數(shù)轉換器 - ADC 12bit 200KHz Unipol RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1286UA/2K5 | 功能描述:模數(shù)轉換器 - ADC 12-Bit Micro Power Sampling RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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