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參數(shù)資料
| 型號： | MAX4246ASA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OP AMP LOW POWER 8-SOIC |
| 其它有關(guān)文件： | Automotive Product Guide |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 2 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 0.4 V/µs |
| 增益帶寬積： | 1MHz |
| 電流 - 輸入偏壓： | 10nA |
| 電壓 - 輸入偏移： | 400µV |
| 電流 - 電源： | 375µA |
| 電流 - 輸出 / 通道： | 30mA |
| 電壓 - 電源，單路/雙路(±)： | 2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
MAX4245/MAX4246/MAX4247
input resistance is typically 4M. For differential volt-
ages greater than 2.1V, input resistance is around
10.6k, and the input bias current can be approximat-
ed by the following equation:
IB = (VDIFF - 2.1V) / 10.6k
In the region where the differential input voltage
approaches 2.1V, the input resistance decreases expo-
nentially from 4M to 10.6k as the diodes begin to
conduct. It follows that the bias current increases with
the same curve.
In unity-gain configuration, high slew-rate input signals
may capacitively couple to the output through the
triple-diode stacks.
Rail-to-Rail Output Stage
The MAX4245/MAX4246/MAX4247 can drive a 2k
load and still typically swing within 35mV of the supply
rails. Figure 3 shows the output voltage swing of the
MAX4245 configured with AV = -1V/V.
Applications Information
Power-Supply Considerations
The MAX4245/MAX4246/MAX4247 operate from a sin-
gle +2.5V to +5.5V supply (or dual ±1.25V to ±2.75V
supplies) and consume only 320A of supply current
per amplifier. A 90dB power-supply rejection ratio
allows the amplifiers to be powered directly off a
decaying battery voltage, simplifying design and
extending battery life.
Power-Up
The MAX4245/MAX4246/MAX4247 output typically set-
tles within 4s after power-up. Figure 4 shows the out-
put voltage on power-up and power-down.
Shutdown Mode
The MAX4245/MAX4247 feature a low-power shutdown
mode. When SHDN_ is pulled low, the supply current
drops to 50nA per amplifier, the amplifier is disabled,
and the output enters a high-impedance state. Pulling
SHDN_ high enables the amplifier. Figure 5 shows the
MAX4245/MAX4247’s shutdown waveform.
Due to the output leakage currents of three-state
devices and the small internal pullup current for SHDN_,
do not leave SHDN_ open/high-impedance. Leaving
SHDN_ open may result in indeterminate logic levels,
and could adversely affect op amp operation. The logic
threshold for SHDN_ is referred to VSS. When using dual
supplies, pull SHDN_ to VSS, not GND, to shut down the
op amp.
Driving Capacitive Loads
The MAX4245/MAX4246/MAX4247 are unity-gain stable
for loads up to 470pF. Applications that require greater
capacitive drive capability should use an isolation
resistor between the output and the capacitive load
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
8
_______________________________________________________________________________________
IN-
5.3k
IN+
5.3k
Figure 2. Input Protection Circuit
OUT
IN
2V/div
400s/div
Figure 3. Rail-to-Rail Input/Output Voltage Range
OUT
VDD
2V/div
10s/div
Figure 4. Power-Up/Power-Down Waveform
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4246AUA | 功能描述:運算放大器 - 運放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4246AUA+ | 功能描述:運算放大器 - 運放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4246AUA+T | 功能描述:運算放大器 - 運放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4246AUA-T | 功能描述:運算放大器 - 運放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4247AUB | 功能描述:運算放大器 - 運放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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