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参数资料
| 型号： | MAX922CSA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR DUAL LOWPWR 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 通用 |
| 元件数： | 2 |
| 输出类型： | CMOS，TTL |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 11 V，±1.25 V ~ 5.5 V |
| 电压 - 输入偏移（最小值）： | 10mV @ 5V |
| 电流 - 输出（标准）： | 50mA |
| 电流 - 静态（最大值）： | 5µA |
| CMRR, PSRR（标准）： | 80dB CMRR，80dB PSRR |
| 传输延迟（最大）： | 12µs |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 管件 |
MAX921–MAX924
Ultra Low-Power,
Single/Dual-Supply Comparators
12
______________________________________________________________________________________
2. Select R1. The leakage current into INB- is normally
under 1nA, so the current through R1 should
exceed 100nA for the thresholds to be accurate. R1
values up to about 10M
Ω can be used, but values in
the 100k
Ω to 1MΩ range are usually easier to deal
with. In this example, choose R1 = 294k
Ω.
3. Calculate R2 + R3. The overvoltage threshold
should be 5.5V when VIN is rising. The design
equation is as follows:
4. Calculate R2. The undervoltage threshold should
be 4.5V when VIN is falling. The design equation is
as follows:
5. Calculate R3.
Choose R3 = 1M
Ω (1% standard value)
6. Verify the resistor values. The equations are as
follows, evaluated for the above example.
Bar-Graph Level Gauge
The high output source capability of the MAX921 series
is useful for driving LEDs. An example of this is the
simple four-stage level detector shown in Figure 7.
The full-scale threshold (all LEDs on) is given by VIN =
(R1 + R2)/R1 volts. The other thresholds are at 3/4 full
scale, 1/2 full scale, and 1/4 full scale. The output
resistors limit the current into the LEDs.
Level Shifter
Figure 8 shows a circuit to shift from bipolar ±5V inputs
to TTL signals. The 10k
Ω resistors protect the
comparator inputs, and do not materially affect the
operation of the circuit.
Overvoltage threshold :
V
(V
V )
(R1
R2
R3)
R1
5.474V.
Undervoltage threshold :
V
(V
V )
(R1
R2
R3)
(R1 + R2)
4.484V,
where the hysteresis voltage V
V
R5
R4
OTH
REF
H
UTH
REF
H
REF
=+
×
++
=
×
++
=
=×
.
R3
(R2 + R3)
R2
.068M
6
k
1.006M
=
11 9
.
Ω
R2
(R1 + R2 + R3)
(V
V )
V
R1
(294k + 1.068M)
(1.182
0.005)
4.5
294k
62.2k
Choose R2
61.9k
(1% standard value).
REF
H
UTH
=×
=×
=
Ω
R2
R3
R1
V
1
294k
5.5
(1.182
0.005)
1
1.068M
OTH
REF
H
+=
×
+
=×
+
=Ω
MAX923
INB-
REF
HYST
INA+
V-
V+
OUTA
OUTB
10k
R5
2.4M
R1
R2
R3
UNDERVOLTAGE
POWER GOOD
OVERVOLTAGE
VIN
VOTH = 5.5V
VUTH = 4.5V
R4
+5V
Figure 6. Window Detector
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX922CSA+ | 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 |
| MAX922CSA+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 |
| MAX922CSA-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 |
| MAX922CUA | 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 |
| MAX922CUA+ | 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 |
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