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参数资料
| 型号： | MAX1314ECM |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges |
| 中文描述： | 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48 |
| 封装： | 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBC, TQFP-48 |
| 文件页数： | 24/36页 |
| 文件大小： | 487K |
| 代理商： | MAX1314ECM |
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M
8-/4-/2-Channel,12-Bit,Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
24
______________________________________________________________________________________
Power-Up Reset
At power-up, all channels are selected for conversion
(see the
Configuration Register
section). After applying
power, allow the 1ms wake-up time to elapse and then
initiate a dummy conversion and discard the results.
After the dummy conversion is complete, accurate con-
versions can be obtained.
Power-Saving Modes
Shutdown Mode
During shutdown the internal reference and analog
circuits in the device shutdown and the analog supply
current drops to 0.6μA (typ). Select shutdown mode
using the SHDN input. Set SHDN high to enter shut-
down mode. SHDN takes precedence over
CHSHDN
.
Entering and exiting shutdown mode does not change
the configuration byte. However, a new configuration
byte can be written while in shutdown mode by follow-
ing the standard write procedure shown in Figure 6.
EOC
and
EOLC
are high when the MAX1304–MAX1306/
MAX1308–MAX1310/MAX1312–MAX1314 are shut down.
The state of the digital outputs D0–D11 is independent
of the state of SHDN. If
CS
and
RD
are low, the digital
outputs D0–D11 are active regardless of SHDN. The
digital outputs only go high impedance when
CS
or
RD
is high. When the digital outputs are powered down, the
digital supply current drops to 20nA.
Exiting shutdown (falling edge of SHDN) starts a con-
version in the same way as the rising edge of CONVST.
After coming out of shutdown, initiate a dummy conver-
sion and discard the results. After the dummy conver-
sion, allow the 1ms wake-up time to expire before
initiating the first accurate conversion.
Channel Shutdown (
CHSHDN
)
The channel-shutdown feature allows analog input
channels to be powered down when they are not
selected for conversion. Powering down channels that
are not selected for conversion reduces the analog
supply current by 2.9mA per channel. To power down
channels that are not selected for conversion, pull
CHSHDN
low. See the
Configuration Register
section
for information on selecting and deselecting channels
for conversion.
The drawback of powering down analog inputs that are
not selected for conversion is that it takes time to power
them up. Figure 10 shows how a dummy conversion is
used to power up an analog input in external clock
mode. After selecting a new channel in the configura-
tion register, initiate a dummy conversion and discard
the results. After the dummy conversion, allow the 1ms
wake-up time (t
WAKE
) to expire before initiating the first
accurate conversion.
D0–D11
CONVST
t
CTR
t
ACC
t
REQ
t
RDL
t
RDH
t
RTC
t
CVEOLCD
t
EOC
t
QUIET1
= 50ns
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
ONLY LAST PULSE SHOWN
EOC
RD
CS*
EOLC
* CS CAN BE LOW AT ALL TIMES, LOW DURING THE RD CYCLES, OR THE SAME AS RD.
Figure 9. Read After Conversion—Eight Channels Selected, External Clock
相关PDF资料 |
PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1314ECM+ | 功能描述:模数转换器 - ADC 12-Bit 2Ch 1.075Msps 3V Precision 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 |
| MAX1314ECM+T | 功能描述:模数转换器 - ADC 12-Bit 2Ch 1.075Msps 3V Precision 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 |
| MAX1314ECM-T | 功能描述:模数转换器 - 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 |
| MAX1315ECM | 功能描述:模数转换器 - 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 |
| MAX1315ECM+ | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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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