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| 型号： | MAX44268EWL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/15页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR W/REF DUAL 9WLP |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 通用 |
| 元件数： | 2 |
| 输出类型： | 开路漏极 |
| 电压 - 电源，单路/双路(±)： | 1.8 V ~ 5.5 V |
| 电压 - 输入偏移（最小值）： | 5mV @ 5V |
| 电流 - 输入偏压（最小值）： | 0.15nA |
| 电流 - 输出（标准）： | 50mA |
| 电流 - 静态（最大值）： | 1.15µA |
| CMRR, PSRR（标准）： | 80dB PSRR |
| 传输延迟（最大）： | 39µs |
| 磁滞： | 6mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 9-WFBGA，WLBGA |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
Maxim Integrated Products 9
MAX44268
1.3mm x 1.3mm, Low-Power
Dual Comparator with Reference
Detailed Description
The MAX44268 is a general-purpose dual comparator for
battery-powered devices where area, power, and cost
constraints are crucial. The IC can operate with a low
1.8V supply rail typically consuming 0.7A quiescent cur-
rent per comparator. This makes it ideal for mobile and
very low-power applications. The IC’s common-mode
input voltage range extends 200mV beyond-the-rails. An
internal 4mV hysteresis ensures clean output switching,
even with slow-moving input signals.
Input Stage Structure
The input common-mode voltage range extends from
(VGND - 0.2V) to (VCC + 0.2V). The comparator operates
at any different input voltage within these limits with low
input bias current. Input bias current is typically 0.15nA if
the input voltage is between the supply rails. The device
also features a 1.236V reference voltage output on the
inverting input of comparator A.
The IC features a unique input ESD structure that can
handle voltages from -0.3V to +6V independent of supply
voltage. This allows for the device to be powered down
with a signal still present on the input without damag-
ing the part. This feature is useful in applications where
one of the inputs has transient spikes that exceed the
supply rails.
No Output Phase Reversal
for Overdriven Inputs
The IC’s design is optimized to prevent output phase
reversal if both the inputs are within the input common-
mode voltage range. If one of the inputs is outside the
input common-mode voltage range, then output phase
reversal does not occur as long as the other input is
kept within the valid input common-mode voltage range.
This behavior is shown in the No Output Phase Reversal
graph in the Typical Operating Characteristics section.
Open-Drain Output
The IC features an open-drain output, enabling greater
control of speed and power consumption in the circuit
design. The output logic level is also independent from
the input, allowing for simple level translation.
RF Immunity
The IC has very high RF immunity due to on-chip filtering
of RF sensitive nodes. This allows the IC to hold its output
state even in the presence of high amounts of RF noise.
This improved RF immunity makes the IC ideal for mobile
wireless devices.
Applications Information
Hysteresis
Many comparators oscillate in the linear region of opera-
tion because of noise or undesired parasitic feedback.
This tends to occur when the voltage on one input is
equal or very close to the voltage on the other input.
The hysteresis in a comparator creates two trip points:
one for the rising input voltage and one for the falling input
voltage (Figure 1). The difference between the trip points
is the hysteresis. When the comparator’s input voltages
are equal and the output trips, the hysteresis effectively
causes one comparator input to move quickly past the
other. This takes the input out of the region where oscil-
lation occurs. This provides clean output transitions for
noisy, slow-moving input signals. The IC has an internal
hysteresis of 4mV. Additional hysteresis can be generat-
ed with three resistors using positive feedback (Figure 2).
Figure 1. Threshold Hysteresis Band (Not to Scale)
Figure 2. Adding Hysteresis with External Resistors
THERSHOLDS
IN+
IN-
OUT
VHYST
VTH
VTL
HYSTERESIS BAND
VCC
R2
R3
R1
R4
VIN
VREF
GND
OUT
MAX44268
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX44269EWL+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX44269EWL+T | 功能描述:校验器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX4426C/D | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX4426C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX4426C/D+ | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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