ADR827 Analog Devices, ADR827 Datasheet

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ADR827

Manufacturer Part Number
ADR827
Description
1.25V Low Power, Precision Reference and Op Amp
Manufacturer
Analog Devices
Datasheet

Specifications of ADR827

-3db Bandwidth
1MHz
Slew Rate
0.5V/µs
Vos
100µV
Ib
10nA
# Opamps Per Pkg
1
Input Noise (nv/rthz)
16nV/rtHz
Vcc-vee
2.7V to 30V
Isy Per Amplifier
n/a
Packages
SOP
FEATURES
10-lead MSOP
400 μA supply current
−40°C to +125°C temperature range
On-board precision resistors
Reference
Amplifier
APPLICATIONS
Battery-powered instrumentation
Portable medical instrumentation
Data acquisition systems
Industrial process controls
Automotive applications
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.
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.
Trademarks and registered trademarks are the property of their respective owners.
ADR827: 2.7 V to 15 V operation
ADR827
ADR821: 2.8 V to 15 V operation
±0.2% initial accuracy
15 ppm/°C temperature drift maximum
+5 mA/−3 mA output drive
ADR821
Rail-to-rail input and output
500 μV offset voltage maximum
50 nA bias current maximum
Unity gain stable
No phase reversal
±2.8 V to ±15 V operation
2.8 V to 15 V single-supply operation
±2.7 V to ±15 V operation
2.7 V to 15 V single-supply operation
Low Power, Precision Reference
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. Selection Table
Part No.
ADR827ARMZ
ADR827BRMZ
ADR821ARMZ
ADR821BRMZ
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.
FUNCTIONAL BLOCK DIAGRAM
GND
NC
V+
V–
R
1
Reference
V
1.25 V
1.25 V
2.50 V
2.50 V
OUT
1
2
3
4
5
ADR821/ADR827
NC = NO CONNECT
R
©2007 Analog Devices, Inc. All rights reserved.
1
REF
ADR821/ADR827
Figure 1.
±0.2%
±0.2%
Reference
Accuracy
±0.4%
±0.4%
R
2
10
and Op Amp
9
8
7
6
AMP_OUT
R
–IN
+IN
REF_OUT
2
Reference
Temperature
Coefficient
30 ppm/°C
15 ppm/°C
30 ppm/°C
15 ppm/°C
www.analog.com

Related parts for ADR827

ADR827 Summary of contents

Page 1

... V ±0.2% 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 − ...

Page 2

... Revision History ............................................................................... 2 Specifications..................................................................................... 3 ADR821 Electrical Characteristics—Reference ....................... 3 ADR821 Electrical Characteristics—Amplifier (V = ±2.8 V)................................................................................. 4 S ADR821 Electrical Characteristics—Amplifier (V = ±15 V).................................................................................. 5 S ADR827 Electrical Characteristics—Reference ....................... 6 ADR827 Electrical Characteristics—Amplifier (V = ±2.7 V)................................................................................. 7 S ADR827 Electrical Characteristics—Amplifier (V = ±15 V).................................................................................. 8 S REVISION HISTORY 10/07—Revision 0: Initial Version Absolute Maximum Ratings ............................................................9 Thermal Resistance ...

Page 3

... IN 0 kHz μ load, −40°C < T < +125° load, −40°C < T < +125° Rev Page ADR821/ADR827 Min Typ 2.490 2.500 2.495 2.500 < +125° < +125° < +125° ...

Page 4

... ADR821/ADR827 ADR821 ELECTRICAL CHARACTERISTICS—AMPLIFIER ( 25°C, unless otherwise noted Table 3. Parameter INPUT CHARACTERISTICS Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Bias Current Large Signal Voltage Gain Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage High ...

Page 5

... V to ± kΩ pF, A LOAD LOAD GBP LOAD φ LOAD 0 p kHz N Rev Page ADR821/ADR827 Min Typ Max 100 500 109.5 118 100 111 < +125°C 75 100 A 85 14.8 14.9 14.75 − ...

Page 6

... ADR821/ADR827 ADR827 ELECTRICAL CHARACTERISTICS—REFERENCE 25° OUT Table 5. Parameter Symbol OUTPUT VOLTAGE V OUT A Grade B Grade INITIAL ACCURACY V OERR A Grade B Grade TEMPERATURE COEFFICIENT TCV A Grade B Grade DROPOUT (V – OUT IN DO LINE REGULATION ∆V LOAD REGULATION ∆V ...

Page 7

... ADR827 ELECTRICAL CHARACTERISTICS—AMPLIFIER ( 25°C, unless otherwise noted Table 6. Parameter INPUT CHARACTERISTICS Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Bias Current Large Signal Voltage Gain Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage High ...

Page 8

... ADR821/ADR827 ADR827 ELECTRICAL CHARACTERISTICS—AMPLIFIER ( 25°C, unless otherwise noted Table 7. Parameter INPUT CHARACTERISTICS Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Bias Current Large Signal Voltage Gain Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage High ...

Page 9

... Rating packages. ±18 V Indefinite Table 9. Thermal Resistance –65°C to +125°C Package Type –40°C to +125°C 10-Lead MSOP (RM-10) –65°C to +125°C 300°C ESD CAUTION Rev Page ADR821/ADR827 is JA θ θ Unit JA JC 172 50 °C/W ...

Page 10

... AMP_OUT V+ AMP_OUT ADR821 ADR827 GND – TOP VIEW NC + (Not to Scale) V– REF_OUT CONNECT Figure 2. Pin Configuration Description Input Voltage of the Reference/Positive Supply of the Amplifier Resistance Tied to Positive Input of the Amplifier ...

Page 11

... TEMPERATURE (°C) Figure 7. ADR827 Line Regulation vs. Temperature 0. 0.1µ 0.1µF OUT 0.35 0.30 +125°C 0.25 +25°C 0.20 –40°C 0.15 0.10 0.05 0 2.5 5.0 7.5 10.0 SUPPLY VOLTAGE (±V) Figure 8. ADR827 Supply Current (+) vs. Supply Voltage 95 110 125 C = 0.1µ 0.1µF OUT V = 15V IN 95 110 125 12.5 15.0 ...

Page 12

... 110 125 Rev Page 0. 0.1µ 0.1µF OUT 0.20 +125°C 0.15 +25°C –40°C 0.10 0.05 0 2.5 5.0 7.5 10.0 SUPPLY VOLTAGE (±V) Figure 12. ADR827 Supply Current (−) vs. Supply Voltage 2 0.1µ 0.1µF 1.8 OUT 1.6 1.4 –40°C 1.2 +25°C 1.0 0.8 +125°C 0.6 0.4 0.2 0 –3 –2 – ...

Page 13

... Rev Page ADR821/ADR827 = 5mA = C = 0.1µF OUT 15V S – 110 TEMPERATURE (° 0.1µF OUT TIME (1s/DIV) Figure 19. ADR827 0 Noise = C = 0.1µF OUT TIME (1s/DIV) Figure 20. ADR827 kHz Noise 125 ...

Page 14

... Figure 21. ADR821 Turn-On Response CHANNEL 1V/DIV OUT CHANNEL 2V/DIV 0µ 0.1µF L TIME = 20µs/DIV Rev Page CHANNEL 500mV/DIV OUT 2 CHANNEL 2V/DIV 0µ 0.1µ TIME = 20µs/DIV Figure 22. ADR827 Turn-On Response ...

Page 15

... Figure 28. Output Swing Saturation Voltage vs. Load Current Rev Page ADR821/ADR827 V = ±15V 25° –15 –12 –9 –6 – (V) CM Figure 26. Input Offset Voltage vs. Common-Mode Voltage 0 – ...

Page 16

... ADR821/ADR827 70 50 PHASE 30 10 GAIN –10 –30 –50 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 29. Open-Loop Gain and Phase vs. Frequency 100 –10 –20 –30 –40 –50 –60 100 1k 10k 100k FREQUENCY (Hz) Figure 30. Closed-Loop Gain vs. Frequency 1200 V = ±15V 25°C ...

Page 17

... Figure 35. Small Signal Transient Response 10kΩ 100pF ±15V SY 2 TIME = 1µs/DIV Figure 36. Small Signal Transient Response, C 1000 100 100 pF L Rev Page ADR821/ADR827 V = ±15V 25° 100 1000 10000 FREQUENCY (Hz) Figure 37. Voltage Noise Density ...

Page 18

... ADR821/ADR827 APPLICATIONS INFORMATION +2.5 V AND −2.5 V OUTPUTS (ADR821) REF_OUT REF V+ +IN AMP_OUT V– 10kΩ 10kΩ 1 Figure 38. +2.5 V and −2.5 V Outputs In many dual-supply applications desirable to have ±2.5 V references. Using the configuration shown in Figure 38 possible to generate −2.5 V with the help of a +2.5 V reference, an internal op amp, and 10 kΩ ...

Page 19

... Rev Page ADR821/ADR827 0.80 8° 0.60 0° 0.40 Package Package Ordering Description Option Quantity 10-Lead MSOP RM-10 1,000 10-Lead MSOP RM-10 250 10-Lead MSOP RM-10 1,000 10-Lead MSOP RM-10 250 10-Lead MSOP RM-10 1,000 10-Lead MSOP ...

Page 20

... ADR821/ADR827 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06665-0-10/07(0) Rev Page ...

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