LM285-1.2

Application

Applications
- Portable Meter References
- Portable Test Instruments
- Battery-Operated Systems
- Current-Loop Instrumentation
- Panel Meters Interchangeable With





Pinout






Specifications

Reverse current, I_R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
Forward current, I_F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Package thermal impedance, _JA (see Notes 1 and 2): D package. . . . . . . 97°C/W
LP package.. . . . . . 140°C/W
PS package. . . . . . . 95°C/W
PW package. . . . . . 149°C/W
Operating virtual junction temperature, T_{J.............}. . . . . . . . . . . . . . . . . . . . . .150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . 260°C
Storage temperature range, T_stg. . . . . . . . . . . . . . . . . . . . . . . . . . .-65 to 150

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Initial Accuracy (+/-) Max	1 %
Reference Voltage	1.235 V
Tempco, max (ppm/C)	150 ppm
Operating Current	0.01 mA
Output Current	20 mA
Temperature Min	-40 deg C
Temperature Max	85 deg C
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Description

The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 10A 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

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Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM285BXM-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285BXMX-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285BXZ-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285BYM-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285BYMX-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285BYZ-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285M-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285MX-1.2	SLM	0	42786	0	0	3352500	2	951281028
LM285Z-1.2	SLM	0	42786	0	0	3352500	2	951281028

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.