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參數(shù)資料
| 型號(hào)： | LP2901IQ1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW-POWER QUAD DIFFERENTIAL COMPARATOR |
| 中文描述： | 低功耗四差分比較器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 160K |
| 代理商： | LP2901IQ1 |
www.ti.com
APPLICATION INFORMATION
IN +
IN
OUT
30 k
+
V
CC
1/4 LP2901
IN +
IN
100 k
1/4 LP2901
1/4 SN54/74LS00 or
1/4 SN54/74ALS1000A
V
CC
12
3
OUT
V
CC
V
O
Q2
Q1
Q3
I
1
= 6
μ
A
LP2901-Q1
LOW-POWER QUAD DIFFERENTIAL COMPARATOR
SLCS148–SEPTEMBER 2005
Figure 1
shows the basic configuration for using the LP2901 comparator.
Figure 2
shows the diagram for using it
as a CMOS driver.
Figure 1. Basic Comparator
Figure 2. CMOS Driver
All pins of any unused comparators should be grounded. The bias network of the LP2901 establishes a drain
current that is independent of the magnitude of the power-supply voltage over the range of 2 V to 30 V. It usually
is necessary to use a bypass capacitor across the power-supply line.
The differential input voltage may be larger than V
without damaging the device. Protection should be provided
to prevent the input voltages from going negative by more than –0.3 V. The output section has two distinct
modes of operation, the Darlington mode and the ground-emitter mode. This unique drive circuit permits the
device to sink 30 mA at V
= 2 V in the Darlington mode and 700
μ
A at V
= 0.4 V in the ground-emitter mode.
Figure 3
is a simplified schematic diagram of the output section. The output section is configured in a Darlington
connection (ignoring Q3). If the output voltage is held high enough (above 1 V), Q1 is not saturated and the
output current is limited only by the product of the h
of Q1, the h
of Q2, and I
and the 60-
saturation
resistance of Q2. The devices are capable of driving LEDs, relays, etc. in this mode while maintaining an
ultra-low power-supply current of 60
μ
A typical.
Figure 3. Output-Section Schematic Diagram
4
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PDF描述 |
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| LP2902 | Micropower Quad Operational Amplifier |
| LP2902M | Micropower Quad Operational Amplifier |
| LP2902N | Micropower Quad Operational Amplifier |
| LP2904DGK | ULTRA-LOW-POWER DUAL OPERATIONAL AMPLIFIERS |
| LP2904DGKR | ULTRA-LOW-POWER DUAL OPERATIONAL AMPLIFIERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2901J | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-POWER QUAD DIFFERENTIAL COMPARATORS |
| LP2901N | 功能描述:校驗(yàn)器 IC Quad Differential RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LP2901NE4 | 功能描述:校驗(yàn)器 IC Quad Low-Power Differential RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LP2901NG4 | 制造商:Texas Instruments 功能描述:COMPARATOR GEN PURPOSE QUAD 2901 |
| LP2901-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-POWER QUAD DIFFERENTIAL COMPARATOR |
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