- 您现在的位置：买卖IC网 > PDF目录10751 > MAX9019EKA+T (Maxim Integrated Products)IC COMPARATOR DUAL SOT23-8 PDF资料下载
参数资料
| 型号： | MAX9019EKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/17页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR DUAL SOT23-8 |
| 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： | 通用 |
| 元件数： | 2 |
| 输出类型： | CMOS，推挽式，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）： | 2µA |
| CMRR, PSRR（标准）： | 80dB PSRR |
| 传输延迟（最大）： | 28µs |
| 磁滞： | 4mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | SOT-23-8 |
| 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： | MAX9019EKA+TDKR |
MAX9015–MAX9020
SOT23, Dual, Precision, 1.8V, Nanopower
Comparators With/Without Reference
14
Maxim Integrated
Board Layout and Bypassing
The MAX9015–MAX9020 ultra-low supply current typical-
ly requires no power-supply bypass capacitors. However,
when the supply has high output impedance, long lead
lengths or excessive noise, or fast transients, bypass VCC
to VEE with a 0.1F capacitor placed as close to the VCC
pin as possible. Minimize signal trace lengths to reduce
stray capacitance. Use a ground plane and surface-
mount components for best performance. If REF is
decoupled, use a low-leakage ceramic capacitor. High
traces should not be routed in the vicinity of or below
MAX9018. There is a chance of voltage reference being
overloaded resulting in drop of output voltage.
Window Detector
The MAX9018 is ideal for window detectors (undervolt-
age/overvoltage detectors). Figure 4 shows a window
detector circuit for a single-cell Li+ battery with a 2.9V end-
of-life charge, a peak charge of 4.2V, and a nominal value
of 3.6V. Choose different thresholds by changing the val-
ues of R1, R2, and R3. OUTA provides an active-low
undervoltage indication, and OUTB provides an active-low
overvoltage indication. ANDing the two open-drain outputs
provides an active-high, power-good signal.
The design procedure is as follows:
1) Select R1. The input bias current into INB- is nor-
mally less than 2nA, so the current through R1
should exceed 100nA for the thresholds to be accu-
rate. In this example, choose R1 = 1.24M
Ω
(1.24V/1A).
2) Calculate R2 + R3. The overvoltage threshold
should be 4.2V when VIN is rising. The design
equation is as follows:
=2.95M
Ω
3) Calculate R2. The undervoltage threshold should
be 2.9V when VIN is falling. The design equation is
as follows:
= 546k
Ω
For this example, choose a 499k
Ω standard value 1%
resistor.
4) Calculate R3:
R3 = (R2 + R3) - R2
= 2.95M
Ω - 546kΩ
= 240M
Ω
5) Verify the resistor values. The equations are as fol-
lows, evaluated for the above example:
Overvoltage threshold:
Undervoltage threshold:
where the internal hysteresis band, VHB, is 4mV.
Zero-Crossing Detector
Figure 5 shows a zero-crossing detector application.
The MAX9015/MAX9016/MAX9019/MAX9020s’ invert-
ing input is connected to ground, and its noninverting
input is connected to a 100mVP-P signal source. As the
signal at the noninverting input crosses zero, the com-
parator’s output changes state.
VV
V
x
RR
R
RR
V
UTH
REF
HB
=
++
+
=
()
.
12
3
12
297
VV
V
x
RR
R
V
OTH
REF
HB
=+
++
=
()
.
12
3
1
420
=Ω +
Ω
Ω
(.
.
)
(.
)
.
124
295
1 236
29
124
MM
x
M
RR
R
x
VV
V
R
REF
HB
UTH
21
2
3
1
=+
+
()
=Ω
+
124
42
1 24
0 004
1
.
..
Mx
V
RR
R x
V
VV
OTH
REF
HB
23
1
+=
+
MAX9018
VCC
INA+
OUTA
VCC
VEE
REF/INA-
REF
1.24V
INB+
INB-
OUTB
VEE
VIN V
OTH = 4.2V
VUTH = 2.9V
R3
R2
R1
5V
POWER-
GOOD
Figure 4. Window Detector Circuit
相关PDF资料 |
PDF描述 |
|---|---|
| B37950K1473K062 | CAP CER 0.047UF 100V X7R 1210 |
| V300C2M50B | CONVERTER MOD DC/DC 2V 50W |
| B37950K1153K062 | CAP CER 0.015UF 100V X7R 1210 |
| MAX9020EKA+T | IC COMPARATOR DUAL SOT23-8 |
| B37950K1223K062 | CAP CER 0.022UF 100V X7R 1210 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX901A | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Speed, Low-Power Voltage Comparators |
| MAX901ACPE | 功能描述:校验器 IC High-Speed Voltage 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 |
| MAX901ACPE+ | 功能描述:校验器 IC High-Speed Voltage 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 |
| MAX901ACPP | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Speed, Low-Power Voltage Comparators |
| MAX901ACSE | 功能描述:校验器 IC High-Speed Voltage 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 |
发布紧急采购，3分钟左右您将得到回复。