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参数资料
| 型号： | MAX989EUA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR R-R 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 通用 |
| 元件数： | 2 |
| 输出类型： | CMOS，推挽式，满摆幅，TTL |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V |
| 电压 - 输入偏移（最小值）： | 5mV @ 5.5V |
| 电流 - 输入偏压（最小值）： | 1pA @ 5.5V |
| 电流 - 静态（最大值）： | 24µA |
| CMRR, PSRR（标准）： | 80dB CMRR，80dB PSRR |
| 传输延迟（最大）： | 450ns |
| 磁滞： | ±3mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 管件 |
| 产品目录页面： | 1387 (CN2011-ZH PDF) |
MAX985/MAX986/MAX989/
MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
8
Maxim Integrated
5) Calculate R2 as follows. For this example, choose an
8.2k
standard value:
6) Verify trip voltages and hysteresis as follows:
MAX986/MAX990/MAX994
The MAX986/MAX990/MAX994 have ±3mV internal
hysteresis. They have open-drain outputs and require
an external pullup resistor (Figure 2). Additional hys-
teresis can be generated using positive feedback, but
the formulas differ slightly from those of the
MAX985/MAX989/MAX993.
Use the following procedure to calculate resistor
values:
1) Select R3 according to the formulas R3 = VREF /
500A or R3 = (VREF - VCC) / 500A - R4. Use the
smaller of the two resulting resistor values.
2) Choose the hysteresis band required (VHB). For this
example, choose 50mV.
3) Calculate R1 according to the following equation:
R1 = (R3 + R4) x (VHB / VCC)
4) Choose the trip point for VIN rising (VTHR; VTHF is
the trip point for VIN falling). This is the threshold
voltage at which the comparator switches its output
from low to high as VIN rises above the trip point.
5) Calculate R2 as follows:
6) Verify trip voltages and hysteresis as follows:
Board Layout and Bypassing
Power-supply bypass capacitors are not typically need-
ed, but use 100nF bypass capacitors when supply
impedance is high, when supply leads are long,
or when excessive noise is expected on the supply
lines. Minimize signal trace lengths to reduce stray
capacitance.
V
rising: V
= V
x R1 x
1
R1
V
falling
IN
THR
REF
IN
:
++
+
=
+
=
1
2
1
34
1
34
RR
R
VV
Rx V
RR
Hysteresis
V
THF
THR
CC
THR
THF
R2 =
1
V
THR
REF xR
R
1
34
+
V
rising: V
= V
x R1 x
1
R1
V
falling
IN
THR
REF
IN
:
++
=
=
1
2
1
3
1
3
RR
VV
Rx V
R
Hysteresis
V
THF
THR
CC
THR
THF
R2 =
1
V
R2 =
1
3.0V
1.2 x 12k
THR
REF
.
xR
R
kM
k
1
3
1
12
1
22
803
=
VEE
VCC
OUT
R3
R2
R1
R4
VREF
VIN
VCC
MAX986
MAX990
MAX994
Figure 2. Additional Hysteresis (MAX986/MAX990/MAX994)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX989EUA+ | 功能描述:校验器 IC Dual uPower 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 |
| MAX989EUA+T | 功能描述:校验器 IC Dual uPower 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 |
| MAX989EUA-T | 功能描述:校验器 IC Dual uPower 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 |
| MAX989EUA-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX990EKA | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product 制造商:Rochester Electronics LLC 功能描述: |
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