参数资料
| 型号： | MAX4244ESD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP BTR 14-SOIC |
| 标准包装： | 2,500 |
| 系列： | Beyond-the-Rails™ |
| 放大器类型： | 通用 |
| 电路数： | 4 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.04 V/µs |
| 增益带宽积： | 90kHz |
| 电流 - 输入偏压： | 2nA |
| 电压 - 输入偏移： | 200µV |
| 电流 - 电源： | 14µA |
| 电流 - 输出 / 通道： | 2.5mA |
| 电压 - 电源，单路/双路(±)： | 1.8 V ~ 5.5 V，±0.9 V ~ 2.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 带卷 (TR) |
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
RL = 100kΩ TIED TO VEE
VIN = 2.0V
fIN = 1kHz
IN
In the region where the differential input voltage
MAX4240-44 fig03
approaches 1.8V, the input resistance decreases expo-
nentially from 45M
Ω to 4.4kΩ as the diode block begins
conducting. Conversely, the bias current increases with
the same curve.
1V/div
200
s/div
Figure 3. Rail-to-Rail Input/Output Voltage Range
MAX4240–MAX424
4
OUT
Rail-to-Rail Output Stage
The MAX4240–MAX4244 output stage can drive up to a
10k
Ω load and still swing to within 40mV of the rails.
Figure 3 shows the output voltage swing of a MAX4240
configured as a unity-gain buffer, powered from a single
+2V supply voltage. The output for this setup typically
swings from (VEE + 6mV) to (VCC - 8mV) with a 100kΩ
load.
__________Applications Information
Power-Supply Considerations
The MAX4240–MAX4244 operate from a single +1.8V
to +5.5V supply (or dual ±0.9V to ±2.75V supplies) and
100
consume only 10A of supply current per amplifier. A
high power-supply rejection ratio of 85dB allows the
amplifiers to be powered directly off a decaying battery
90
voltage, simplifying design and extending battery life.
The MAX4240–MAX4244 are ideally suited for use with
most battery-powered systems. Table 1 lists a variety of
typical battery types showing voltage when fresh, volt-
age at end-of-life, capacity, and approximate operating
time from a MAX4240/MAX4241, assuming nominal
conditions for both normal and shutdown modes.
PSRR
(dB)
80
70
TA = +85°C
TA = -40°C
TA = +25°C
MAX4240-44
fig04
Although the amplifiers are fully guaranteed over tem-
60
perature for operation down to a +1.8V single supply,
1.0
1.2
1.4
1.6
1.8
2.0
even lower-voltage operation is possible in practice.
SUPPLY VOLTAGE (V)
Figures 4 and 5 show the PSRR and supply current as
a function of supply voltage and temperature.
Figure 4. Power-Supply Rejection Ratio vs. Supply Voltage
Power-Up Settling Time
The MAX4240–MAX4244 typically require 200s to
12
power up after VCC is stable. During this start-up time,
the output is indeterminant. The application circuit
10
TA = +85°C
TA = +25°C
TA = -40°C
MAX4240-44
fig05
should allow for this initial delay.
Shutdown Mode
The MAX4241 (single) and MAX4243 (dual) feature a
low-power shutdown mode. When the shutdown pin
(SHDN) is pulled low, the supply current drops to 1A
per amplifier, the amplifier is disabled, and the outputs
enter a high-impedance state. Pulling SHDN high or
SUPPLY
CURRENT
(
A)
8
6
4
leaving it floating enables the amplifier. Take care to
ensure that parasitic leakage current at the SHDN pin
does not inadvertently place the part into shutdown
2
0
1.0
1.2
1.4
1.6
1.8
2.0
mode when SHDN is left floating. Figure 6 shows the
SUPPLY VOLTAGE (V)
output voltage response to a shutdown pulse. The logic
threshold for SHDN is always referred to VCC / 2 (not to
Figure 5. Supply Current vs. Supply Voltage
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4245AUT | 制造商:Maxim Integrated Products 功能描述:ULTRA-SMALL RAIL-TO-RAIL I/O WITH - Rail/Tube |
| MAX4245AUT+ | 制造商:Maxim Integrated Products 功能描述:OP AMP SGL GP R-R I/O 2.75V/5.5V 6PIN SOT-23 - Rail/Tube |
| MAX4245AUT+T | 功能描述:运算放大器 - 运放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| MAX4245AUT-T | 功能描述:运算放大器 - 运放 Rail-Rail I/O w/Disable RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| MAX4245AXT | 制造商:Maxim Integrated Products 功能描述:ULTRA-SMALL RAIL-TO-RAIL I/O WITH - Rail/Tube |
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