Micropower Voltage Reference - LM385-2.5

LM385-2.5 (ACTIVE)

Micropower Voltage Reference

 

Recommended alternative parts

  • ATL431  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   This device has a lower cathode current (35uA max).
  • TL431  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   This device has a wider, adjustable output voltage (36V max). 

Description

The LMx85-2.5 and LM385B are micropower, two-terminal, band-gap voltage references that operate over a 20-µA to 20-mA current range and feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming provides tight voltage tolerance. The band-gap reference for these devices has low noise and long-term stability.

The design makes these devices exceptionally tolerant of capacitive loading and, thus, easier to use in most reference applications. The wide dynamic operating temperature range accommodates varying current supplies, with excellent regulation.

The extremely low power drain of this series makes these devices useful for micropower circuitry. These voltage references can be used to make portable meters, regulators, or general-purpose analog circuitry, with battery life approaching shelf life. The wide operating current range of these voltage references allows them to replace older references with tighter-tolerance parts.

Features

  • Operating Current Range 20 μA to 20 mA
  • 1.5% and 3% Initial Voltage Tolerance
  • Reference Impedance
    • LM385 1 Ω Maximum at 25°C
    • All Devices 1.5 Ω Maximum Over Full
      Temperature Range
  • Very Low Power Consumption

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Parametrics Compare all products in Shunt Voltage Reference

 
Reference Voltage
VO (V)
VO Adj (Min) (V)
VO Adj (Max) (V)
Initial Accuracy (Max) (%)
Temp Coeff (Max) (ppm/ degree C)
Rating
Operating Temperature Range (C)
Min Iz for Regulation (uA)
Iout/Iz (Max) (mA)
Package Group
Approx. Price (US$)
LM385-2.5 LM285-1.2 LM285-2.5 LM385-1.2 LM385B-1.2 LM385B-2.5
Fixed     Fixed     Fixed     Fixed     Fixed     Fixed    
2.5     1.235     2.5     1.235     1.235     2.5    
2.5     1.235     2.5     1.235     1.235     2.5    
2.5     1.235     2.5     1.235     1.235     2.5    
3     1     1.5     1     1     1.5    
20     20     20     150     20     20    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
0 to 70     -40 to 85     -40 to 85     -40 to 85
0 to 70    
0 to 70     0 to 70    
8     8     8     8     8     8    
20     20     20     20     20     20    
SOIC
TO-92
TSSOP    
SOIC
TO-92    
SOIC
TO-92    
SO
SOIC
TO-92
TSSOP
WAFERSALE    
SOIC
TO-92
TSSOP    
SOIC
TO-92
TSSOP    
0.17 | 1ku     0.18 | 1ku     0.18 | 1ku     0.17 | 1ku     0.24 | 1ku     0.24 | 1ku