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| 型号： | MAX9026EBT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR BTR 6-UCSP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | Beyond-the-Rails™ |
| 类型： | 带电压基准 |
| 元件数： | 1 |
| 输出类型： | 开路漏极，满摆幅 |
| 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）： | 0.001µA @ 5V |
| 电流 - 输出（标准）： | 50mA |
| 电流 - 静态（最大值）： | 2.2µA |
| CMRR, PSRR（标准）： | 50.45dB CMRR，60dB PSRR |
| 传输延迟（最大）： | 31µs |
| 磁滞： | 4mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 6-WFBGA，CSPBGA |
| 安装类型： | 表面贴装 |
| 包装： | 标准包装 |
| 产品目录页面： | 1391 (CN2011-ZH PDF) |
| 其它名称： | MAX9026EBT+TDKR |
MAX9025–MAX9028
UCSP, 1.8V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference
10
______________________________________________________________________________________
Reference (MAX9025/MAX9026)
The MAX9025–MAX9028s’ internal +1.236V reference
has a typical temperature coefficient of 40ppm/°C over
the full -40°C to +85°C temperature range. The reference
is a very-low-power bandgap cell, with a typical 35k
output impedance. REF can source and sink up to
100nA to external circuitry. For applications needing
increased drive, buffer REF with a low input-bias current
op amp such as the MAX4162. Most applications require
no REF bypass capacitor. For noisy environments or fast
VCC transients, connect a 1nF to 10nF ceramic capacitor
from REF to GND.
Applications Information
Low-Voltage, Low-Power Operation
The MAX9025–MAX9028 are ideally suited for use with
most battery-powered systems. Table 1 lists a variety of
battery types, capacities, and approximate operating
times for the MAX9025–MAX9028, assuming nominal
conditions.
Internal 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
MAX9025–MAX9028 have internal 4mV hysteresis to
counter parasitic effects and noise.
The hysteresis in a comparator creates two trip points:
one for the rising input voltage (VTHR) and one for the
falling input voltage (VTHF) (Figure 2). The difference
between the trip points is the hysteresis (VHB). When
the comparator’s input voltages are equal, the hystere-
sis effectively causes one comparator input to move
quickly past the other, thus taking the input out of the
region where oscillation occurs. Figure 2 illustrates the
case in which IN- has a fixed voltage applied, and IN+
is varied. If the inputs were reversed, the figure would
be the same, except with an inverted output.
Adding External Hysteresis
In applications requiring more than the internal 4mV
hysteresis of the MAX9025–MAX9028, additional hys-
teresis can be added with external components.
Because the MAX9025–MAX9028 are intended for very
low-power systems, care should be taken to minimize
power dissipation in the additional circuitry.
Regardless of which approach is taken, the external
hysteresis will be VCC dependent. Over the full discharge
range of battery-powered systems, the hysteresis can
change as much as 40%. This must be considered
during design.
BANDGAP
REF
VEE
VCC
Figure 1. MAX9025/MAX9026 Voltage Reference Output
Equivalent Circuit
Table 1. Battery Applications Using MAX9025–MAX9028
BATTERY
TYPE
RECHARGEABLE VFRESH (V)
VEND-OF-LIFE
(V)
CAPACITY,
AA SIZE
(mA-H)
MAX9025/MAX9026
OPERATING TIME
(hr)
MAX9027/MAX9028
OPERATING TIME
(hr)
Alkaline
(2 Cells)
No
3.0
1.8
2000
1.8 x 10
6
2.8 x 10
6
Nickel-
Cadmium
(2 Cells)
Yes
2.4
1.8
750
680,000
1.07 x 10
6
Lithium-Ion
(1 Cell)
Yes
3.5
2.7
1000
0.9 x 10
6
1.4 x 10
6
Nickel-Metal-
Hydride
(2 Cells)
Yes
2.4
1.8
1000
0.9 x 10
6
1.4 x 10
6
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相关代理商/技术参数 |
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| MAX9027 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference |
| MAX9027EBT | 制造商:Maxim Integrated Products 功能描述:UCSP, 1.8V, NANOPOWER, BEYOND-THE-RAILS COMPA - Bulk |
| MAX9027EBT+ | 制造商:Maxim Integrated Products 功能描述:COMPARATOR SGL R-R O/P 5.5V 6UCSP - Rail/Tube |
| MAX9027EBT+T | 功能描述:校验器 IC UCSP 1.8V nPower 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 |
| MAX9027EBT+TW | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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