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參數(shù)資料
| 型號： | MAX127-MAX128 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Multirange, +5V, 12-Bit DAS with 2-Wire Serial Interface |
| 中文描述： | 多量程，5V的，12位DAS的2線串行接口 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大小： | 124K |
| 代理商： | MAX127-MAX128 |
M
To power-up from a software initiated power-down, a
START condition followed by the correct slave address
must be received (with R/
W
= 0). The MAX127/MAX128
power-up after receiving the next bit.
For hardware-controlled power-down (FULLPD), pull
SHDN
low. When hardware shutdown is asserted, it
becomes effective immediately and any conversion in
progress is aborted.
Choosing Power-Down Modes
The bandgap reference and reference buffer remain
active in STBYPD mode, maintaining the voltage on the
4.7μF capacitor at REF. This is a “DC” state that does
not degrade after standby power-down of any duration.
In FULLPD mode, only the bandgap reference is active.
Connect a 33μF capacitor between REF and AGND to
maintain the reference voltage between conversions
and to reduce transients when the buffer is enabled
and disabled. Throughput rates down to 1ksps can be
achieved without allotting extra acquisition time for ref-
erence recovery prior to conversion. This allows con-
version to begin immediately after power-down ends. If
the discharge of the REF capacitor during FULLPD
exceeds the desired limits for accuracy (less than a
fraction of an LSB), run a STBYPD power-down cycle
prior to starting conversions. Take into account that the
reference buffer recharges the bypass capacitor at an
80mV/ms slew rate, and add 50μs for settling time.
Auto-Shutdown
Selecting STBYPD on every conversion automatically
shuts the MAX127/MAX128 down after each conversion
without requiring any start-up time on the next conversion.
Multirange, +5V, 12-Bit DAS with
2-Wire S erial Interfac e
14
______________________________________________________________________________________
REF
10k
2.5V
C
REF
4.7
μ
F
2.5V
REFADJ
A
V
= 1.638
0.01
μ
F
MAX127
MAX128
Figure 11c. External Reference, Reference at REFADJ
100k
510k
24k
REFADJ
+5V
0.01
μ
F
MAX127
MAX128
Figure 12. Reference-Adjust Circuit
REF
10k
2.5V
C
REF
4.7
μ
F
0.01
μ
F
REFADJ
A
V
= 1.638
MAX127
MAX128
Figure 11a. Internal Reference
REF
V
DD
10k
2.5V
4.096V
C
REF
4.7
μ
F
REFADJ
A
V
= 1.638
MAX127
MAX128
Figure 11b. External Reference, Reference at REF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1280BCUP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1280BCUP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 400ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1280BCUP+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 400ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1280BCUP-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(jié)構(gòu):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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1280BEUP | 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(jié)構(gòu):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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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