LM385-1.2 - Micropower Voltage Reference Diode
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
±1% and 2% initial tolerance
Operating current of 10μA to 20mA
1Ω dynamic impedance
Low temperature coefficient
Low voltage reference—1.235V
2.5V device and adjustable device also available
LM185-2.5 series and LM185 series, respectively

General Description


The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal band-gap voltage regulator diodes. More...


  Typical Application
*click for larger image


ParametersValues
Initial Accuracy (+/-) Max 2 %
Reference Voltage 1.235 V
Tempco, max (ppm/C) 150 ppm
Operating Current 0.01 mA
Output Current 20 mA
Temperature Min 0 deg C
Temperature Max 70 deg C


Typical Performance


click for larger image


  Also Recommended
LM385-2.52.5V Fixed Reference Voltage
LM385-ADJAdjustable Reference Voltage
Connection Diagram
*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode 294
Kbytes
30-Jan-08 Download
LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode (Japanese)
474 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM385BM-1.2SOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.39rail
of
95
NSZXTT
LM385
BM1.2
8 weeks2000
LM385BXM-1.2SOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$1.37rail
of
95
NSZXTT
385BX
M1.2
12 weeks1000
LM385BYM-1.2SOIC NARROW8NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now
1K+$0.92rail
of
95
NSZXTT
385BY
M1.2
12 weeks1000
LM385M-1.2SOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$0.26rail
of
95
NSZXTT
LM385
M1.2
8 weeks2000
LM385BMX-1.2SOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.39reel
of
2500
NSZXTT
LM385
BM1.2
8 weeks3000
LM385BXMX-1.2SOIC NARROW8NOPB1260RoHS N/A Full productionN/A
 
Buy Now
1K+$1.37reel
of
2500
NSZXTT
385BX
M1.2
12 weeks3000
LM385BYMX-1.2SOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.92reel
of
2500
NSZXTT
385BY
M1.2
12 weeks15000
LM385MX-1.2SOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.26reel
of
2500
NSZXTT
LM385
M1.2
8 weeks3000
LM385M3-1.2SOT-233NOPB
STD
1
1
260
260
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$0.44reel
of
1000
R11
XTT
6 weeks5000
LM385M3X-1.2SOT-233NOPB
STD
1
1
260
260
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.44reel
of
3000
R11
XTT
8 weeks7500
LM385BXZ-1.2TO-923NOPB1NARoHS N/A Full productionN/A
 
Buy Now
1K+$1.13box
of
1800
NSXYTT
385BX
Z-1.2
8 weeks2500
LM385BYZ-1.2TO-923NOPB
STD
1
1
NA
NA
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.90box
of
1800
NSXYTT
385BY
Z-1.2
8 weeks2000
LM385BZ-1.2TO-923NOPB
STD
1
1
NA
NA
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$0.42box
of
1800
NSXYTT
LM385
BZ1.2
8 weeks2000
LM385Z-1.2TO-923NOPB
STD
1
1
NA
NA
RoHS N/A Full productionN/A
 
Buy Now
1K+$0.26box
of
1800
NSXYTT
LM385
Z-1.2
12 weeks5000

General Description


The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 10μA to 20mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM185-1.2 band-gap reference uses only transistors and resistors, low noise and good long term stability result.

Careful design of the LM185-1.2 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 LM185-1.2 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.

The LM185-1.2 is rated for operation over a −55°C to 125°C temperature range while the LM285-1.2 is rated −40°C to 85°C and the LM385-1.2 0°C to 70°C. The LM185-1.2/LM285-1.2 are available in a hermetic TO-46 package and the LM285-1.2/LM385-1.2 are also available in a low-cost TO-92 molded package, as well as SO and SOT-23. The LM185-1.2 is also available in a hermetic leadless chip carrier package.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM385BM-1.2SLM04404600353250011002356520
LM385BMX-1.2SLM04404600353250011002356520
LM385BXM-1.2SLM04404600353250011002356520
LM385BXMX-1.2SLM04404600353250011002356520
LM385BXZ-1.2SLM04404600353250011002356520
LM385BYM-1.2SLM04404600353250011002356520
LM385BYMX-1.2SLM04404600353250011002356520
LM385BYZ-1.2SLM04404600353250011002356520
LM385BZ-1.2SLM04404600353250011002356520
LM385M-1.2SLM04404600353250011002356520
LM385M3-1.2LB30003366400383050011086914834
LM385M3X-1.2LB30003366400383050011086914834
LM385MX-1.2SLM04404600353250011002356520
LM385Z-1.2SLM04404600353250011002356520

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 8-Nov-2009]