ADR821 amp Datasheet

ADR821 Datasheet PDF, Equivalent


Part Number

ADR821

Description

(ADR821 / ADR827) precision voltage reference and op amp

Manufacture

Analog Devices

Total Page 20 Pages
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ADR821
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FEATURES
10-lead MSOP
400 μA supply current
−40°C to +125°C temperature range
On-board precision resistors
Reference
ADR821: 2.8 V to 15 V operation
ADR827: 2.7 V to 15 V operation
±0.2% initial accuracy
15 ppm/°C temperature drift maximum
+5 mA/−3 mA output drive
Amplifier
ADR821
±2.8 V to ±15 V operation
2.8 V to 15 V single-supply operation
ADR827
±2.7 V to ±15 V operation
2.7 V to 15 V single-supply operation
Rail-to-rail input and output
500 μV offset voltage maximum
50 nA bias current maximum
Unity gain stable
No phase reversal
APPLICATIONS
Battery-powered instrumentation
Portable medical instrumentation
Data acquisition systems
Industrial process controls
Automotive applications
Low Power, Precision Reference
and Op Amp
ADR821/ADR827
FUNCTIONAL BLOCK DIAGRAM
ADR821/ADR827
V+ 1
10 AMP_OUT
R1 2
R1
R2
9 R2
GND 3
8 –IN
NC 4
V– 5
REF
7 +IN
6 REF_OUT
NC = NO CONNECT
Figure 1.
Table 1. Selection Table
Part No.
ADR827ARMZ
ADR827BRMZ
ADR821ARMZ
ADR821BRMZ
Reference
VOUT
1.25 V
1.25 V
2.50 V
2.50 V
Reference
Accuracy
±0.4%
±0.2%
±0.4%
±0.2%
Reference
Temperature
Coefficient
30 ppm/°C
15 ppm/°C
30 ppm/°C
15 ppm/°C
GENERAL DESCRIPTION
The ADR821/ADR827 combines a precision voltage reference
and an op amp in a 10-lead mini small outline package (MSOP).
The reference and the op amp can be operated independently,
offering the user a range of flexibility when arranging the
combination. Featuring a combined operating current of less
than 400 μA and 15 ppm/°C temperature drift on the reference,
the ADR821/ADR827 are ideally suited for applications requir-
ing precision and low power.
Available with the reference at 1.25 V and at 2.5 V, the
ADR821/ADR827 also come in two grades. The reference on
the A grade offers 30 ppm/°C temperature drift performance
and ±0.4% initial accuracy. The B grade provides a tighter
temperature drift performance of 15 ppm/°C and only ±0.2%
initial accuracy. All versions operate from −40°C to +125°C.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.

ADR821
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ADR821/ADR827
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
ADR821 Electrical Characteristics—Reference ....................... 3
ADR821 Electrical Characteristics—Amplifier
(VS = ±2.8 V)................................................................................. 4
ADR821 Electrical Characteristics—Amplifier
(VS = ±15 V).................................................................................. 5
ADR827 Electrical Characteristics—Reference ....................... 6
ADR827 Electrical Characteristics—Amplifier
(VS = ±2.7 V)................................................................................. 7
ADR827 Electrical Characteristics—Amplifier
(VS = ±15 V).................................................................................. 8
REVISION HISTORY
10/07—Revision 0: Initial Version
Absolute Maximum Ratings ............................................................9
Thermal Resistance .......................................................................9
ESD Caution...................................................................................9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 11
Reference ..................................................................................... 11
Amplifier (AD821/AD827)....................................................... 15
Applications Information .............................................................. 18
+2.5 V and −2.5 V Outputs (ADR821) ................................... 18
2.5 V and 5.0 V Outputs (ADR821)......................................... 18
Multiple 2.5 V Outputs (ADR821)........................................... 18
Outline Dimensions ....................................................................... 19
Ordering Guide .......................................................................... 19
Rev. 0 | Page 2 of 20


Features www.DataSheet4U.com Low Power, Precisio n Reference and Op Amp ADR821/ADR827 FE ATURES 10-lead MSOP 400 μA supply curr ent −40°C to +125°C temperature ran ge On-board precision resistors Referen ce ADR821: 2.8 V to 15 V operation ADR8 27: 2.7 V to 15 V operation ±0.2% init ial accuracy 15 ppm/°C temperature dri ft maximum +5 mA/−3 mA output drive A mplifier ADR821 ±2.8 V to ±15 V opera tion 2.8 V to 15 V single-supply operat ion ADR827 ±2.7 V to ±15 V operation 2.7 V to 15 V single-supply operation R ail-to-rail input and output 500 μV of fset voltage maximum 50 nA bias current maximum Unity gain stable No phase rev ersal FUNCTIONAL BLOCK DIAGRAM V+ 1 R1 2 GND 3 NC 4 V– 5 NC = NO CONNECT RE F ADR821/ADR827 R1 R2 10 AMP_OUT 9 8 7 6 R2 –IN +IN REF_OUT Figure 1. T able 1. Selection Table Reference VOUT 1.25 V 1.25 V 2.50 V 2.50 V Reference A ccuracy ±0.4% ±0.2% ±0.4% ±0.2% Ref erence Temperature Coefficient 30 ppm/ C 15 ppm/°C 30 ppm/°C 15 ppm/°C Part No. ADR827ARMZ ADR827BRMZ ADR821ARMZ ADR821BRMZ.
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