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参数资料
| 型号： | ADS1286PC |
| 厂商： | Texas Instruments |
| 文件页数： | 17/17页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SRL 37KSPS 8DIP |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 50 |
| 位数： | 12 |
| 采样率（每秒）： | 20k |
| 数据接口： | 串行，SPI?，SSI |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，单极 |
| 其它名称： | 296-32816-5 ADS1286PC-ND |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1286PCG4 | 功能描述:模数转换器 - ADC 12B Micro Pwr Sampling ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1286PG4 | 功能描述:模数转换器 - ADC 12bit Micro Pwr RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1286PK | 功能描述:模数转换器 - ADC 12-Bit Micro Power Sampling RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1286PKG4 | 功能描述:模数转换器 - ADC 12B Micro Pwr Sampling ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1286PL | 功能描述:模数转换器 - ADC 12-Bit Micro Power Sampling RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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