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参数资料
| 型号： | MAX1178BEUP |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO20 |
| 封装： | 4.40 MM, MO-153, TSSOP-20 |
| 文件页数： | 11/14页 |
| 文件大小： | 330K |
| 代理商： | MAX1178BEUP |
change in input signal. The input amplifier must have a
high enough slew rate to complete the required output
voltage change before the beginning of the acquisition
time. Figure 10 shows an example of this circuit using
the MAX427.
Figures 11 and 12 show how the MAX1178/MAX1188
analog input current varies depending on whether the
chip is operating or powered down. The part is fully
powered down between conversions if the voltage at
R/
C
is set high during the second falling edge of
CS
.
The input current abruptly steps to the powered-up
value at the start of acquisition. This step in the input
current can disrupt the ADC input, depending on the
driving circuit
’
s output impedance at high frequencies. If
the driving circuit cannot fully settle by the end of acqui-
sition, the accuracy of the system can be compromised.
To avoid this situation, increase the acquisition time, use
a driving circuit that can settle within t
ACQ
, or leave the
MAX1178/MAX1188 powered up by setting the voltage
at R/
C
low during the second falling edge of
CS
.
Layout, Grounding, and Bypassing
For best performance, use printed circuit boards. Do not
run analog and digital lines parallel to each other, and do
not lay out digital signal paths underneath the ADC pack-
age. Use separate analog and digital ground planes with
only one point connecting the two ground systems (ana-
log and digital) as close to the device as possible.
Route digital signals far away from sensitive analog and
reference inputs. If digital lines must cross analog lines,
do so at right angles to minimize coupling digital noise
onto the analog lines. If the analog and digital sections
share the same supply, isolate the digital and analog
supply by connecting them with a low-value (10
)
resistor or ferrite bead.
The ADC is sensitive to high-frequency noise on the
AV
DD
supply. Bypass AV
DD
to AGND with a 0.1μF
capacitor in parallel with a 1μF to 10μF low-ESR capaci-
tor with the smallest capacitor closest to the device.
Keep capacitor leads short to minimize stray inductance.
M
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
______________________________________________________________________________________
11
MAX1178
MAX1188
MAX427
ANALOG
INPUT
AIN
REF
Figure 10. MAX1178/MAX1188 Fast-Settling Input Buffer
-1.5
-0.5
-1.0
0.5
0
1.0
1.5
-5.0
0
-2.5
ANALOG INPUT VOLTAGE (V)
2.5
5.0
MAX1178
ANALOG INPUT CURRENT
vs. ANALOG INPUT VOLTAGE
A
STANDBY
MODE
SHUTDOWN
MODE
Figure 11. MAX1178 Analog Input Current
-1.5
-0.5
-1.0
0.5
0
1.0
1.5
-10
0
-5
5
10
MAX1188
ANALOG INPUT CURRENT
vs. ANALOG INPUT VOLTAGE
ANALOG INPUT VOLTAGE (V)
A
STANDBY
MODE
SHUTDOWN
MODE
Figure 12. MAX1188 Analog Input Current
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1178 | 16-Bit. 135ksps. Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1188 | 16-Bit. 135ksps. Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178ACUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178AEUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178BCUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1178BEUP+ | 功能描述:模数转换器 - ADC 16-Bit 135ksps 4.2V 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 |
| MAX1178BEUP+T | 功能描述:模数转换器 - ADC 16-Bit 135ksps 4.2V 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 |
| MAX1178BEUP-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 |
| MAX1178CCUP | 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 |
| MAX1178CCUP+ | 功能描述:模数转换器 - ADC 16-Bit 135ksps 4.2V 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 |
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