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LM385Z-2.5/LFT7 参数 Datasheet PDF下载

LM385Z-2.5/LFT7图片预览
型号: LM385Z-2.5/LFT7
PDF下载: 下载PDF文件 查看货源
内容描述: LM185-2.5 -N / LM285-2.5 -N / LM385-2.5 -N微功耗电压基准二极管 [LM185-2.5-N/LM285-2.5-N/LM385-2.5-N Micropower Voltage Reference Diode]
分类和应用: 二极管
文件页数/大小: 22 页 / 1193 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SNVS743D – DECEMBER 1999 – REVISED MARCH 2013
LM185-2.5-N/LM285-2.5-N/LM385-2.5-N Micropower Voltage Reference Diode
Check for Samples:
1
FEATURES
±20 mV (±0.8%) max. Initial Tolerance (A
Grade)
Operating Current of 20
μA
to 20 mA
0.6Ω Dynamic Impedance (A Grade)
Low Temperature Coefficient
Low Voltage Reference—2.5V
1.2V Device and Adjustable Device Also
Available—LM185-1.2 Series and LM185
Series, respectively
2
Careful design of the LM185-2.5-N has made the
device exceptionally tolerant of capacitive loading,
making it easy to use in almost any reference
application. The wide dynamic operating range allows
its use with widely varying supplies with excellent
regulation.
The extremely low power drain of the LM185-2.5-N
makes it useful for micropower circuitry. This voltage
reference can be used to make portable meters,
regulators or general purpose analog circuitry with
battery life approaching shelf life. Further, the wide
operating current allows it to replace older references
with a tighter tolerance part. For applications requiring
1.2V see LM185-1.2.
The LM185-2.5-N is rated for operation over a
−55°C
to 125°C temperature range while the LM285-2.5-N is
rated
−40°C
to 85°C and the LM385-2.5-N 0°C to
70°C. The LM185-2.5-N/LM285-2.5-N are available in
a hermetic TO package and the LM285-2.5-N/LM385-
2.5-N are also available in a low-cost TO-92 molded
package, as well as SOIC and SOT-23. The LM185-
2.5-N is also available in a hermetic leadless chip
carrier package.
DESCRIPTION
The LM185-2.5-N/LM285-2.5-N/LM385-2.5-N are
micropower 2-terminal band-gap voltage regulator
diodes. Operating over a 20
μA
to 20 mA current
range, they feature exceptionally low dynamic
impedance and good temperature stability. On-chip
trimming is used to provide tight voltage tolerance.
Since the LM-185-2.5-N band-gap reference uses
only transistors and resistors, low noise and good
long term stability result.
Connection Diagram
Figure 1. TO-92 Package
(Bottom View)
See Package Number LP0003A
Figure 2. SOIC Package
See Package Number D0008A
* Pin 3 is attached to the Die Attach Pad (DAP) and should be connected to Pin 2 or left floating.
Figure 3. SOT-23
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright © 1999–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.