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| 型号： | MAX4040ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP R-R SNGL 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 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(±)： | 2.4 V ~ 5.5 V，±1.2 V ~ 2.75 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
MAX4040–MAX4044
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
______________________________________________________________________________________
11
For example, a MAX4040 running from a single +2.4V
supply, operating at TA = +25°C, can source 240A to
within 100mV of VCC and is capable of driving a 9.6k
load resistor to VEE:
The same application can drive a 4.6k
load resistor
when terminated in VCC / 2 (+1.2V in this case).
Driving Capacitive Loads
The MAX4040–MAX4044 are unity-gain stable for loads
up to 200pF (see Load Resistor vs. Capacitive Load
graph
in
Typical
Operating
Characteristics).
Applications that require greater capacitive drive capa-
bility should use an isolation resistor between the output
and the capacitive load (Figures 6a–6c). Note that this
alternative results in a loss of gain accuracy because
RISO forms a voltage divider with the load resistor.
Power-Supply Bypassing and Layout
The MAX4040–MAX4044 family operates from either a
single +2.4V to +5.5V supply or dual ±1.2V to ±2.75V
supplies. For single-supply operation, bypass the
power supply with a 100nF capacitor to VEE (in this
case GND). For dual-supply operation, both the VCC
and VEE supplies should be bypassed to ground with
separate 100nF capacitors.
Good PC board layout techniques optimize perfor-
mance by decreasing the amount of stray capacitance
at the op amp’s inputs and output. To decrease stray
capacitance, minimize trace lengths by placing exter-
nal components as close as possible to the op amp.
Surface-mount components are an excellent choice.
Using the MAX4040–MAX4044
as Comparators
Although optimized for use as operational amplifiers,
the MAX4040–MAX4044 can also be used as rail-to-rail
I/O comparators. Typical propagation delay depends
on the input overdrive voltage, as shown in Figure 7.
External hysteresis can be used to minimize the risk of
output oscillation. The positive feedback circuit, shown
in Figure 8, causes the input threshold to change when
the output voltage changes state. The two thresholds
create a hysteresis band that can be calculated by the
following equations:
VHYST = VHI - VLO
VLO = VIN x R2 / (R1 + (R1 x R2 / RHYST) + R2)
VHI = [(R2 / R1 x VIN) + (R2 / RHYST) x VCC] /
(1 + R1 / R2 + R2 / RHYST)
R
=
2.4V - 0.1V
240 A
9.6k
to V
LEE
=
50mV/div
IN
OUT
50mV/div
MAX4040/42/44 fig06b
100
s/div
RISO = NONE, RL = 100k
, CL = 700pF
Figure 6b. Pulse Response without Isolating Resistor
50mV/div
IN
OUT
50mV/div
MAX4040/42/44 fig06c
100
s/div
RISO = 1k
, RL = 100k, CL = 700pF
Figure 6c. Pulse Response with Isolating Resistor
RISO
CL
RL
MAX4040–
MAX4044
AV =
RL
≈ 1
RL + RISO
Figure 6a. Using a Resistor to Isolate a Capacitive Load from
the Op Amp
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| MAX4040EUA+T | IC OP AMP R-R SNGL 8-UMAX |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4040EUA | 功能描述:运算放大器 - 运放 uPower Rail-Rail 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 |
| MAX4040EUA+ | 功能描述:运算放大器 - 运放 uPower Rail-Rail 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 |
| MAX4040EUA+T | 功能描述:运算放大器 - 运放 uPower Rail-Rail 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 |
| MAX4040EUA-T | 功能描述:运算放大器 - 运放 uPower Rail-Rail 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 |
| MAX4040EUK | 制造商:Maxim Integrated Products 功能描述:LOW-COST MICROPOWER RAIL-TO-RAIL - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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