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 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.

Also Recommended LM385-2.5▲ 2.5V Fixed Reference Voltage LM385-ADJ▲ Adjustable Reference Voltage MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application *click for larger image	Connection Diagram *click for larger image
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode	294 Kbytes	30-Jan-08	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-104: Application Note 104 Noise Specs Confusing?	208 Kbytes	14-Oct-02

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Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM385BM-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BMX-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BXM-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BXMX-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BXZ-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BYM-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BYMX-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BYZ-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385BZ-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385M-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385M3-1.2	LB300	0	33664	0	0	3830500	1	1086914834
LM385M3X-1.2	LB300	0	33664	0	0	3830500	1	1086914834
LM385MX-1.2	SLM	0	44046	0	0	3532500	1	1002356520
LM385Z-1.2	SLM	0	44046	0	0	3532500	1	1002356520

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.

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