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参数资料
| 型号： | MAX4247AUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/17页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP LOW POWER 10-UMAX |
| 其它有关文件： | Automotive Product Guide |
| 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： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.4 V/µs |
| 增益带宽积： | 1MHz |
| 电流 - 输入偏压： | 10nA |
| 电压 - 输入偏移： | 400µV |
| 电流 - 电源： | 375µA |
| 电流 - 输出 / 通道： | 30mA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
Detailed Description
Rail-to-Rail Input Stage
The MAX4245/MAX4246/MAX4247 have rail-to-rail input
and output stages that are specifically designed for
low-voltage, single-supply operation. The input stage
consists of composite NPN and PNP differential stages,
which operate together to provide a common-mode
range extending to both supply rails. The crossover
region of these two pairs occurs halfway between VDD
and VSS. The input offset voltage is typically ±400V.
Low-operating supply voltage, low supply current and
rail-to-rail outputs make this family of operational ampli-
fiers an excellent choice for precision or general-pur-
pose, low-voltage, battery-powered systems.
Since the input stage consists of NPN and PNP pairs,
the input bias current changes polarity as the common-
mode voltage passes through the crossover region.
Match the effective impedance seen by each input to
reduce the offset error caused by input bias currents
flowing through external source impedance (Figures 1a
and 1b).
The combination of high-source impedance plus input
capacitance (amplifier input capacitance plus stray
capacitance) creates a parasitic pole that can produce
an underdamped signal response. Reducing input
capacitance or placing a small capacitor across the
feedback resistor improves response in this case.
The MAX4245/MAX4246/MAX4247 family’s inputs are
protected from large differential input voltages by inter-
nal 5.3k series resistors and back-to-back triple-diode
stacks across the inputs (Figure 2). For differential-
input voltages much less than 2.1V (triple-diode drop),
MAX4245/MAX4246/MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
_______________________________________________________________________________________
7
Pin Description
PIN
MAX4245
MAX4246
MAX4247
NAME
FUNCTION
1
—
IN+
Noninverting Input
244
VSS
Ground or Negative Supply
3
—
IN-
Inverting Input
4
—
OUT
Amplifier Output
5—
—
SHDN
Shutdown
6
8
10
VDD
Positive Supply
—
1
OUTA
Amplifier Output Channel A
—
2
INA-
Inverting Input Channel A
—
3
INA+
Noninverting Input Channel A
—
5
7
INB+
Noninverting Input Channel B
—
6
8
INB-
Inverting Input Channel B
—
7
9
OUTB
Amplifier Output Channel B
——
5
SHDNA
Shutdown Channel A
——
6
SHDNB
Shutdown Channel B
IN
R3
R3 = R1R2
R1
R2
VDD
IN
R3
R3 = R1R2
R1
R2
VDD
Figure 1a. Minimizing Offset Error Due to Input Bias Current
(Noninverting)
Figure 1b. Minimizing Offset Error Due to Input Bias Current
(Inverting)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4249ESD | 功能描述:运算放大器 - 运放 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 |
| MAX4249ESD+ | 功能描述:运算放大器 - 运放 Low-Distortion Rail-Rail Op Amp 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 |
| MAX4249ESD+T | 功能描述:运算放大器 - 运放 Low-Distortion Rail-Rail Op Amp 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 |
| MAX4249ESD-T | 功能描述:运算放大器 - 运放 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 |
| MAX4249EUB | 功能描述:运算放大器 - 运放 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 |
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