ADR420| Datasheet

ADR420, ADR421, ADR423, ADR425

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Ultraprecision, Low Noise, 2.048 V/2.500 V/ 3.00 V/5.00 V XFET Voltage References ADR420/ADR421/ADR423/ADR425
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: -40 C to +125 C

PIN CONFIGURATION
TP 1 VIN 2 NIC 3

VOUT TOP VIEW GND 4 (Not to Scale) 5 TRIM
6

ADR420/ ADR421/ ADR423/ ADR425

8 7

TP NIC

NIC = NO INTERNAL CONNECTION TP = TEST PIN (DO NOT CONNECT)

Figure 1. 8-Lead SOIC, 8-Lead MSOP

GENERAL DESCRIPTION
The ADR42x are a series of ultraprecision, second generation eXtra implanted junction FET (XFET) voltage references featuring low noise, high accuracy, and excellent long-term stability in SOIC and MSOP footprints. Patented temperature drift curvature correction technique and XFET technology minimize nonlinearity of the voltage change with temperature. The XFET architecture offers superior accuracy and thermal hysteresis to the band gap references. It also operates at lower power and lower supply headroom than the buried Zener references. The superb noise and the stable and accurate characteristics of the ADR42x make them ideal for precision conversion applications such as optical networks 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 have 8-le
ad SOIC or 30% smaller, 8-lead MSOP packages.

APPLICATIONS
Precision data acquisition systems High resolution converters Battery-powered instrumentation Portable medical instruments Industrial process control systems Precision instruments Optical network control circuits

ADR42x PRODUCTS
Table 1.
Model ADR420 ADR421 ADR423 ADR425 Output Voltage, VOUT (V) 2.048 2.50 3.00 5.00 mV 1, 3 1, 3 1.5, 4 2, 6 Initial Accuracy % 0.05, 0.15 0.04, 0.12 0.04, 0.13 0.04, 0.12 Temperature Coefficient (ppm/ C) 3, 10 3, 10 3, 10 3, 10

Rev. H
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02432-001