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參數(shù)資料
| 型號： | MAX1177BEUP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT 135KSPS 20-TSSOP |
| 標準包裝： | 74 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 135k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 879mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 20-TSSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
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 0.5A (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
(CREFADJ = 0.1F, CREF = 10F).
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 10F and
0.1F, 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
10F capacitor.
Connect REFADJ to AVDD 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 100A 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 10F capacitor.
Consider the MAX1177’s equivalent input noise (0.6
LSB) when choosing a reference.
MAX1177
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
F
REFADJ
MAX1177
Figure 7. MAX1177 Reference Adjust Circuit
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1177BEUP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)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 |
| MAX1177BEUP+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)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 |
| MAX1177BEUP-T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)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 |
| MAX1177CCUP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)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 |
| MAX1177CCUP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)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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