ADR421

Features:

Low Noise (0.1 Hz to 10 Hz)
  ADR420: 1.75
V p-p
  ADR421: 1.75
V p-p
  ADR423: 2.0
V p-p
  ADR425: 3.4
V p-p
Low Temperature Coefficient: 3 ppm/C
Long-Term Stability: 50 ppm/1000 Hours
Load Regulation: 70 ppm/mA
Line Regulation: 35 ppm/V
Low Hysteresis: 40 ppm Typical
Wide Operating Range
  ADR420: 4 V to 18 V
  ADR421: 4.5 V to 18 V
  ADR423: 5 V to 18 V
  ADR425: 7 V to 18 V
Quiescent Current: 0.5 mA Maximum
High Output Current: 10 mA
Wide Temperature Range: 40C to +125C


Application

Precision Data Acquisition Systems
High-Resolution Converters
Battery-Powered Instrumentation
Portable Medical Instruments
Industrial Process Control Systems
Precision Instruments
Optical Network Control Circuits


Pinout




Specifications

Supply Voltage...........................................................................................................  18 V
Output Short-Circuit Duration to GND................................................................   Indefinite
Storage Temperature Range
  R, RM Packages . . . . . . . . . . . . . . . . . . . ...............................................65°C to +150°C
Operating Temperature Range
  ADR42x.................................................. .............................................. 40°C to +125°C
Junction Temperature Range
  R, RM Packages......................................................................................65°C to +150°C
Lead Temperature Range (Soldering, 60 sec) ........................................................300°C
*Absolute maximum ratings apply at 25°C, unless otherwise noted.

Description

The ADR42x series are ultraprecision second-generation XFET voltage references featuring low noise, high accuracy, and excellent long-term stability in a SOIC and Mini_SOIC footprints. Patented temperature drift curvature correction technique and XFET (eXtra implanted junction FET) technology minimize nonlinearity of the voltage change with temperature. The XFET architecture offers superior accuracy and thermal hysteresis to the bandgap references. ADR42x series also operates at lower power and lower supply headroom than the Buried Zener references.

The superb noise, stable, and accurate characteristics of ADR42x make them ideal for precision conversion applications such as optical network and medical equipment. The ADR42x trim terminal can also be used to adjust the output voltage over a ±0.5% range without compromising any other performance. The ADR42x series voltage references offer two electrical grades and are specified over the extended industrial temperature range of 40°C to +125°C. Devices are available in 8-lead SOIC-8 or 30% smaller 8-lead Mini_SOIC-8 packages.