- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358904 > LP239J (Texas Instruments, Inc.) LOW-POWER QUAD DIFFERENTIAL COMPARATORS PDF資料下載
參數(shù)資料
| 型號： | LP239J |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 比較器 |
| 英文描述： | LOW-POWER QUAD DIFFERENTIAL COMPARATORS |
| 中文描述： | 低功耗四差分比較器 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 93K |
| 代理商： | LP239J |
LP239, LP339, LP2901
LOW-POWER QUAD DIFFERENTIAL COMPARATORS
SLCS004A – OCTOBER 1987 – REVISED MAY 1988
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 1 shows the basic configuration for using the LP239, LP339, or LP2901 comparator. Figure 2 shows the
diagram for using one of these comparators as a CMOS driver.
Figure 1. Basic Comparator
IN +
IN –
OUT
30 k
+
–
VCC
1/4 LP239, LP339,
or LP2901
Figure 2. CMOS Driver
IN +
IN –
100 k
1/4 LP239, LP339,
or LP2901
1/4 SN54/74LS00 or
1/4 SN54/74ALS1000A
VCC
+
–
12
3
OUT
All pins of any unused comparators should be grounded. The bias network of the LP239, LP339, and 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 is usually necessary to use a bypass capacitor across the power supply line.
The differential input voltage may be larger than V
CC
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: a Darlington mode and a ground-emitter mode. This unique drive circuit permits
the device to sink 30 mA at V
O
= 2 V in the Darlington mode and 700
μ
A at V
O
= 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
FE
of Q1, the h
FE
of Q2, and I1 and the 60-
saturation
resistance of Q2. The devices are capable of driving LEDs, relays, etc. in this mode while maintaining an ultralow
power supply current of 60
μ
A typically.
VCC
VO
Q2
Q1
Q3
I1 = 6
μ
A
Figure 3. Output-Section Schematic Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP2901IQ1 | LOW-POWER QUAD DIFFERENTIAL COMPARATOR |
| LP2902 | Micropower Quad Operational Amplifier |
| LP2902M | Micropower Quad Operational Amplifier |
| LP2902N | Micropower Quad Operational Amplifier |
| LP2904DGK | ULTRA-LOW-POWER DUAL OPERATIONAL AMPLIFIERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP239N | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-POWER QUAD DIFFERENTIAL COMPARATORS |
| LP24 | 功能描述:開關(guān)配件 RUN RoHS:否 制造商:C&K Components 類型:Cap 用于:Pushbutton Switches 設(shè)計目的: |
| LP-24-100 | 功能描述:XFRMR PWR 115/230V 12VAC 200MA RoHS:是 類別:變壓器 >> 功率 系列:LP 標(biāo)準(zhǔn)包裝:1 系列:260 類型:標(biāo)準(zhǔn) 最大功率:65 VA 主線圈:雙 副線圈:三路，中心抽頭 在某電流時的串聯(lián)輸出電壓:500 VAC @ 85mA，5 VAC @ 2A，6.3 VAC @ 2A 在某電流時的并聯(lián)輸出電壓:- 安裝類型:底座安裝 尺寸/尺寸:102.36mm L x 67.31mm W 高度 - 座高（最大）:66.80mm 端接類型:導(dǎo)線引線 |
| LP24-100 | 制造商:SUPERWORLD 制造商全稱:Superworld Electronics 功能描述:POWER TRANSFORMER |
| LP-24-1000 | 功能描述:XFRMR PWR 115/230V 12VAC 2A RoHS:是 類別:變壓器 >> 功率 系列:LP 標(biāo)準(zhǔn)包裝:1 系列:260 類型:標(biāo)準(zhǔn) 最大功率:65 VA 主線圈:雙 副線圈:三路，中心抽頭 在某電流時的串聯(lián)輸出電壓:500 VAC @ 85mA，5 VAC @ 2A，6.3 VAC @ 2A 在某電流時的并聯(lián)輸出電壓:- 安裝類型:底座安裝 尺寸/尺寸:102.36mm L x 67.31mm W 高度 - 座高（最大）:66.80mm 端接類型:導(dǎo)線引線 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。