- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384669 > MAX4245AXT-T (MAXIM INTEGRATED PRODUCTS INC) Ultra-Small, Rail-to-Rail I/O with Disable, Single-/Dual-Supply, Low-Power Op Amps PDF資料下載
參數(shù)資料
| 型號： | MAX4245AXT-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Ultra-Small, Rail-to-Rail I/O with Disable, Single-/Dual-Supply, Low-Power Op Amps |
| 中文描述： | OP-AMP, 3000 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO6 |
| 封裝： | SC-70, 6 PIN |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 495K |
| 代理商： | MAX4245AXT-T |
M
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:
I
B
= (V
DIFF
- 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 A
V
= -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 320μA 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 4μs 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 let the
SHDN_
float. Floating
SHDN_
may result in
indeterminate logic levels, and could adversely affect
op amp operation. The logic threshold for
SHDN_
is
referred to V
SS
. When using dual supplies, pull
SHDN_
to V
SS
, 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
2V/div
400
μ
s/div
Figure 3. Rail-to-Rail Input/Output Voltage Range
OUT
V
DD
2V/div
2V/div
10
μ
s/div
Figure 4. Power-Up/Power-Down Waveform
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4246 | Differential Bus Transceivers 8-PDIP -40 to 85 |
| MAX4246AUA | Differential Bus Transceivers 8-PDIP -40 to 85 |
| MAX4247 | Differential Bus Transceivers 8-SOIC -40 to 125 |
| MAX4247AUB | Differential Bus Transceivers 8-SOIC |
| MAX4269EEE | Ultra-Low-Distortion, Single-Supply, 300MHz Op Amps with Enable |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4246AKA | 制造商:Maxim Integrated Products 功能描述:ULTRA-SMALL, RAIL-TO-RAIL I/O WITH DISABLE, S - Rail/Tube |
| MAX4246AKA+ | 制造商:Maxim Integrated Products 功能描述:OP AMP DUAL GP R-R I/O 2.75V/5.5V 8PIN SOT-23 - Cut Tape Product |
| MAX4246AKA+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 |
| MAX4246AKA-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 |
| MAX4246ASA+ | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。