Datasheet ADR440, ADR441, ADR443, ADR444, ADR445 (Analog Devices)

Ultralow Noise, LDO XFET Voltage References with Current Sink and Source Data Sheet ADR440 /ADR441/ ADR443 /ADR444/ ADR445 FEATURES PIN CONFIGURATIONS Ultralow noise (0.1 Hz to 10 Hz) DNC ADR440/ 1 8 DNC ADR440: 1 µ V p-p ADR441/ ADR441: 1 .2 µV p-p V ADR443/ IN 2 7 NIC ADR444/ ADR443: 1 .4 µV p-p NIC 3 6 V ADR445 OUT ADR444: 1 .8 µV p-p TOP VIEW GND 4 5 TRIM (Not to Scale) ADR445: 2. 25 µV p-p Superb temperature coefficient NOTES 1. NIC = NOT INTERNALLY CONNECTED. A grade: 10 ppm/°C
001
THIS PIN IS NOT CONNECTED INTERNALLY. 2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN. B grade: 3 ppm/°C
05428-
Low dropout operation (supply voltage headroom): 500 mV
Figure 1. 8-Lead SOIC_N (R Suffix)
Input range: (VOUT + 500 mV) to 18 V ADR440/ High output source and sink current DNC 1 8 DNC ADR441/ +10 mA and −5 mA, respectively V ADR443/ IN 2 7 NIC ADR444/ Wide temperature range: −40°C to +125°C NIC 3 6 V ADR445 OUT TOP VIEW APPLICATIONS GND 4 5 TRIM (Not to Scale) Precision data acquisition systems NOTES High resolution data converters 1. NIC = NOT INTERNALLY CONNECTED.
002
THIS PIN IS NOT CONNECTED INTERNALLY. Battery-powered instrumentation 2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.
05428-
Portable medical instruments
Figure 2. 8-Lead MSOP (RM Suffix)
Industrial process control systems Precision instruments Optical control circuits GENERAL DESCRIPTION
The ADR440/ADR441/ADR443/ADR444/ADR4451 series is a The ADR440/ADR441/ADR443/ADR444/ADR445 family is family of XFET® voltage references featuring ultralow noise, available in 8-lead MSOP and narrow SOIC packages and high accuracy, and low temperature drift performance. Using offered in two electrical grades. All versions are specified over the Analog Devices, Inc., temperature drift curvature correction extended industrial temperature range of −40°C to +125°C. and extra implanted junction FET (XFET) technology, voltage change vs. temperature nonlinearity in the ADR440/ADR441/
Table 1. Selection Guide
ADR443/ADR444/ADR445 is greatly minimized.
Initial Temperature Output Accuracy Coefficient
The XFET references offer better noise performance than buried
Model Voltage (V) (mV) (ppm/°C)
Zener references, and XFET references operate off low supply ADR440A 2.048 ±3 10 voltage headroom (500 mV). This combination of features ADR440B 2.048 ±1 3 makes the ADR440/ADR441/ADR443/ADR444/ ADR445 ADR441A 2.500 ±3 10 family ideally suited for precision signal conversion applications ADR441B 2.500 ±1 3 in high end data acquisition systems, optical networks, and ADR443A 3.000 ±4 10 medical applications. ADR443B 3.000 ±1.2 3 The ADR440/ADR441/ADR443/ADR444/ADR445 family has ADR444A 4.096 ±5 10 the capability to source up to 10 mA of output current and sink ADR444B 4.096 ±1.6 3 up to −5 mA. It also comes with a trim terminal to adjust the ADR445A 5.000 ±6 10 output voltage over a 0.5% range without compromising ADR445B 5.000 ±2 3 performance. 1 Protected by U.S. Patent Number 5,838,192.
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Document Outline Features Applications Pin Configurations General Description Revision History Specifications ADR440 Electrical Characteristics ADR441 Electrical Characteristics ADR443 Electrical Characteristics ADR444 Electrical Characteristics ADR445 Electrical Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Power Dissipation Considerations Basic Voltage Reference Connections Noise Performance Turn On Time Applications Information Output Adjustment Bipolar Outputs Programmable Voltage Source Programmable Current Source High Voltage Floating Current Source Precision Output Regulator (Boosted Reference) Outline Dimensions Ordering Guide