LM185-1.2-N, LM285-1.2-N, LM385-1.2-N

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SNVS742E – JANUARY 2000 – REVISED APRIL 2013

LM185-1.2-N/LM285-1.2-N/LM385-1.2-N Micropower Voltage Reference Diode

Check for Samples: LM185-1.2-N, LM285-1.2-N, LM385-1.2-N

Careful design of the LM185-1.2-N has made the

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FEATURES

device exceptionally tolerant of capacitive loading,

2

•

±1% and 2% Initial Tolerance

making it easy to use in almost any reference

•

Operating Current of 10

μA to 20mA

application. The wide dynamic operating range allows

its use with widely varying supplies with excellent

•

1

Ω Dynamic Impedance

regulation.

•

Low Temperature Coefficient

The extremely low power drain of the LM185-1.2-N

•

Low Voltage Reference—1.235V

makes it useful for micropower circuitry. This voltage

•

2.5V Device and Adjustable Device Also

reference can be used to make portable meters,

Available

regulators or general purpose analog circuitry with

•

LM185-2.5 Series and LM185 Series,

battery life approaching shelf life.

respectively

Further, the wide operating current allows it to

replace older references with a tighter tolerance part.

DESCRIPTION

The LM185-1.2-N is rated for operation over a

−55°C

The

LM185-1.2-N/LM285-1.2-N/LM385-1.2-N

are

to 125°C temperature range while the LM285-1.2-N is

micropower 2-terminal band-gap voltage regulator

rated

−40°C to 85°C and the LM385-1.2-N 0°C to

diodes. Operating over a 10

μA to 20mA current

70°C. The LM185-1.2-N/LM285-1.2-N are available in

range,

they

feature

exceptionally

low

dynamic

a hermetic TO package and the LM285-1.2-N/LM385-

impedance and good temperature stability. On-chip

1.2-N are also available in a low-cost TO-92 molded

trimming is used to provide tight voltage tolerance.

package, as well as SOIC and SOT-23.

Since the LM185-1.2-N band-gap reference uses only

transistors and resistors, low noise and good long

term stability result.

CONNECTION DIAGRAM

Figure 1. T0-92 Package (LP)

(Bottom View)

Figure 3. SOIC Package

* Pin 3 is attached to the Die Attach Pad

(DAP) and should be connected to Pin 2 or

left floating.

Figure 2. SOT-23

Figure 4. TO Package (NDV)

(Bottom View)

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.