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参数资料
| 型号： | MAX1177BCUP |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO20 |
| 封装： | 4.40 MM, MO-153AC, TSSOP-20 |
| 文件页数： | 9/13页 |
| 文件大小： | 293K |
| 代理商： | MAX1177BCUP |
Standby Mode
While in standby mode, the supply current is less than
3.7mA (typ). The next falling edge of
CS
with R/
C
low
causes the MAX1177 to exit standby mode and begin
acquisition. The reference and reference buffer remain
active to allow quick turn-on time.
Shutdown Mode
In shutdown mode, the reference and reference buffer
are shut down between conversions. Shutdown mode
reduces supply current to 0.5μA (typ) immediately after
the conversion. The next falling edge of
CS
with R/
C
low causes the reference and buffer to wake up and
enter acquisition mode. To achieve 16-bit accuracy,
allow 12ms for the internal reference to wake up
(C
REFADJ
= 0.1μF, C
REF
= 10μF).
Internal and External Reference
Internal Reference
The internal reference of the MAX1177 is internally
buffered to provide +4.096V output at REF. Bypass
REF to AGND and REFADJ to AGND with 10μF and
0.1μF, respectively. Sink or source current at REFADJ
to make fine adjustments to the internal reference. The
input impedance of REFADJ is nominally 5k
. Use the
circuit in Figure 7 to adjust the internal reference to
±1.5%.
External Reference
An external reference can be placed at either the input
(REFADJ) or the output (REF) of the MAX1177
’
s internal
buffer amplifier. Using the buffered REFADJ input
makes buffering the external reference unnecessary.
The input impedance of REFADJ is typically 5k
. The
internal buffer output must be bypassed at REF with a
10μF capacitor.
Connect REFADJ to AV
DD
to disable the internal buffer.
Directly drive REF using an external 3.8V to 4.2V refer-
ence. During conversion, the external reference must
be able to drive 100μA of DC load current and have an
output impedance of 10
or less.
For optimal performance, buffer the reference through
an op amp and bypass REF with a 10μF capacitor.
Consider the MAX1177
’
s equivalent input noise (0.6
LSB) when choosing a reference.
M
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
_______________________________________________________________________________________
9
CS
R/C
EOC
REF AND
BUFFER
POWER
ACQUISITION
CONVERSION
DATA
OUT
Figure 5. Selecting Standby Mode
CS
R/C
EOC
REF AND
BUFFER
POWER
ACQUISITION
CONVERSION
DATA
OUT
Figure 6. Selecting Shutdown Mode
+5V
68k
100k
150k
0.1
μ
F
REFADJ
MAX1177
Figure 7. MAX1177 Reference Adjust Circuit
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| MAX1177BEUP | 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1177BCUP+ | 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 |
| MAX1177BCUP+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 |
| MAX1177BCUP-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 |
| MAX1177BEUP | 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 |
| MAX1177BEUP+ | 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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