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參數(shù)資料
| 型號： | LM334MDC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, UUC |
| 封裝： | DIE |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 362K |
| 代理商： | LM334MDC |
LM134/LM234/LM334
3-Terminal Adjustable Current Sources
General Description
The LM134/LM234/LM334 are 3-terminal adjustable current
sources featuring 10,000:1 range in operating current, excel-
lent current regulation and a wide dynamic voltage range of
1V to 40V. Current is established with one external resistor
and no other parts are required. Initial current accuracy is
±3%. The LM134/LM234/LM334 are true floating current
sources with no separate power supply connections. In ad-
dition, reverse applied voltages of up to 20V will draw only a
few dozen microamperes of current, allowing the devices to
act as both a rectifier and current source in AC applications.
The sense voltage used to establish operating current in the
LM134 is 64mV at 25C and is directly proportional to abso-
lute temperature (K). The simplest one external resistor
connection, then, generates a current with
≈+0.33%/C tem-
perature dependence. Zero drift operation can be obtained
by adding one extra resistor and a diode.
Applications for the current sources include bias networks,
surge protection, low power reference, ramp generation,
LED driver, and temperature sensing. The LM234-3 and
LM234-6 are specified as true temperature sensors with
guaranteed initial accuracy of ±3C and ±6C, respectively.
These devices are ideal in remote sense applications be-
cause series resistance in long wire runs does not affect
accuracy. In addition, only 2 wires are required.
The LM134 is guaranteed over a temperature range of
55C to +125C, the LM234 from 25C to +100C and the
LM334 from 0C to +70C. These devices are available in
TO-46 hermetic, TO-92 and SO-8 plastic packages.
Features
n
Operates from 1V to 40V
n
0.02%/V current regulation
n
Programmable from 1A to 10mA
n
True 2-terminal operation
n
Available as fully specified temperature sensor
n ±
3% initial accuracy
Connection Diagrams
SO-8
Surface Mount Package
DS005697-24
Order Number LM334M or
LM334MX
See NS Package Number M08A
SO-8 Alternative Pinout
Surface Mount Package
DS005697-25
Order Number LM334SM or
LM334SMX
See NS Package Number M08A
TO-46
Metal Can Package
DS005697-12
V Pin is electrically connected to case.
Bottom View
Order Number LM134H,
LM234H or LM334H
See NS Package
Number H03H
TO-92 Plastic Package
DS005697-10
Bottom View
Order Number LM334Z, LM234Z-3 or LM234Z-6
See NS Package Number Z03A
March 2000
LM134/LM234/LM334
3-T
erminal
Adjustable
Current
Sources
2001 National Semiconductor Corporation
DS005697
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM334MX | 功能描述:基準電壓& 基準電流 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓撲結(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| LM334MX/NOPB | 功能描述:基準電壓& 基準電流 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓撲結(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| LM334S8 | 功能描述:IC CURRENT SOURCE 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)流/電流管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關(guān) 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設(shè)備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| LM334S8#PBF | 功能描述:IC CURRENT SOURCE 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)流/電流管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關(guān) 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設(shè)備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| LM334S8#TR | 功能描述:IC CURRENT SOURCE 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)流/電流管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關(guān) 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設(shè)備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
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