- 您现在的位置：买卖IC网 > PDF目录10667 > MAX9647AXK+T (Maxim Integrated Products)IC COMPARATOR GP SGL SC70-5 PDF资料下载
参数资料
| 型号： | MAX9647AXK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/11页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR GP SGL SC70-5 |
| 标准包装： | 2,500 |
| 类型： | 通用 |
| 元件数： | 1 |
| 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）： | 7mV @ 5V |
| 电流 - 输入偏压（最小值）： | 0.25µA @ 5V |
| 电流 - 输出（标准）： | 35mA @ 5V |
| 电流 - 静态（最大值）： | 120µA |
| CMRR, PSRR（标准）： | 90dB PSRR |
| 传输延迟（最大）： | 110ns |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | * |
| 安装类型： | * |
| 包装： | * |
MAX9647/MAX9648
General-Purpose, Low-Voltage,
Tiny Pack Comparators
9
Maxim Integrated
Additional hysteresis can be generated with two resis-
tors using positive feedback (Figure 2). Use the following
procedure to calculate resistor values:
1) Find output voltage when output is high:
VOUT(HIGH) = VDD - ILOAD x RL
2) Find the trip points of the comparator using these
formulas:
VTH = VREF + ((VOUT(HIGH) - VREF)R2)/(R1 + R2)
VTL = VREF(1 - (R2/(R1 + R2)))
where VTH is the threshold voltage at which the compara-
tor switches its output from high to low as VIN rises above
the trip point, and VTL is the threshold voltage at which
the comparator switches its output from low to high as
VIN drops below the trip point.
3) The hysteresis band is:
VHYST = VTH - VTL = VDD(R2/(R1 + R2))
In this example, let VDD = 5V, VREF = 2.5V, ILOAD =
50nA, and RL = 5.1kI.
VOUT(HIGH) = 5.0V - (50 x 10-9 x 5.1 x 103I) ≈ 5.0V
VTH = 2.5 + 2.5(R2/(R1 + R2))
VTL = 2.5(1 - (R2/(R1 + R2)))
Select R2. In this example, choose 1kI.
Select VHYST. In this example, choose 50mV.
Solve for R1.
VHYST = VOUT(HIGH)(R2/(R1 + R2))V
0.050V = 5(1000/(R1 + 1000))V
where R1
≈ 100kI, VTH = 2.525V, and VTL = 2.475V
Choose R1 and R2 to be large enough as not to exceed
the amount of current the reference can supply.
The source current required is VREF/(R1 + R2).
The sink current is (VOUT(HIGH) - VREF) x (R1 + R2).
Choose RL to be large enough to avoid drawing excess
current, yet small enough to supply the necessary cur-
rent to drive the load. RL should be between 1kI and
10kI. Choose R1 to be much larger than RL to avoid
lowering VOUT(HIGH) ir raising VOUT(LOW).
Board Layout and Bypassing
Use 0.1FF bypass capacitors from VDD to VSS. To maxi-
mize performance, minimize stray inductance by putting
this capacitor close to the VDD pin and reducing trace
lengths. For slow moving input signals (rise time > 1ms),
use a 1nF capacitor between IN+ and IN- to reduce high
frequency noise.
Figure 1. Threshold Hysteresis Band (Not to Scale)
Figure 2. Adding Hysteresis with External Resistors
IN+
THRESHOLDS
IN-
VHYST
VTL
VTH
HYSTERESIS
BAND
OUT
IN+
OUT
RL
R1
R2
VREF
VIN
VDD
VOUT
VDD
VSS
IN-
MAX9647
相关PDF资料 |
PDF描述 |
|---|---|
| MAX9647AUK+T | IC COMPARATOR GP SGL SOT23-5 |
| AD7687BRMZ | IC ADC 16BIT 250KSPS 10-MSOP |
| CS5509-ASZ | IC ADC 16BIT SGNL SUPP 16-SOIC |
| HA1-4900-2 | IC COMPARATOR QUAD PREC 16-DIP |
| LTC1867ACGN#PBF | IC ADC 16BIT 8CH 200KSPS 16SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9647EVKIT# | 功能描述:其他开发工具 MAX9647 Eval Kit RoHS:否 制造商:Parallax 产品:ELEV-8 Hex Upgrade Kits 类型:Robotics 工具用于评估:ELEV-8 Quadcopter 工作电源电压: |
| MAX9648AUK+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX9648AUK+T | 功能描述:校验器 IC Low-Power 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 |
| MAX9648AXK+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX9648AXK+T | 功能描述:校验器 IC Low-Power 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。