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PDF ( 数据手册 , 数据表 ) ADR827

零件编号 ADR827
描述 (ADR821 / ADR827) precision voltage reference and op amp
制造商 Analog Devices
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ADR827 数据手册, 描述, 功能
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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.







ADR827 pdf, 数据表
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ADR821/ADR827
ADR827 ELECTRICAL CHARACTERISTICS—AMPLIFIER (VS = ±15 V)
VCM = 0 V, TA = 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
Symbol Conditions
VOS
TCVOS
IB
IOS
AVO
CMRR
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +125°C
VOUT = −14 V to +14 V
RLOAD = 10 kΩ, −40°C < TA < +125°C
RLOAD = 2 kΩ, −40°C < TA < +125°C
VCM = −14 V to +14 V, −40°C < TA < 125°C
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Output Current
POWER SUPPLY
Positive Supply Current
Negative Supply Current
Power Supply Rejection Ratio
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
VOH
VOL
ISC
ISY+
ISY−
PSRR
SR
GBP
φM
eN p-p
eN
ILOAD = 1 mA
ILOAD = 1 mA, −40°C < TA < +125°C
ILOAD = 1 mA
ILOAD = 1 mA, −40°C < TA < +125°C
Short-circuit current
No load, −40°C < TA < +125°C
No load, −40°C < TA < +125°C
VS = ±2.7 V to ±15 V
RLOAD = 10 kΩ, CLOAD = 10 pF, AV = +1
CLOAD = 14 pF
CLOAD = 14 pF
f = 0.1 Hz to 10 Hz
f = 1 kHz
Min Typ Max Unit
100 500
25
10 50
5 25
μV
μV/°C
nA
nA
109.5
100
75
85
118
111
100
dB
dB
dB
dB
14.8
14.75
14.9
−14.9
±20
−14.8
−14.75
V
V
V
V
mA
400 μA
300 μA
75 100
dB
0.5 V/μs
1.0 MHz
75.4 Degrees
0.2 μV p-p
16 nV/√Hz
Rev. 0 | Page 8 of 20







ADR827 equivalent, schematic
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ADR821/ADR827
70 120
VSY = ±15V
TA = 25°C 105
50 90
PHASE
30
75
60
45
10
GAIN
30
15
–10 0
–15
–30 –30
–45
–50 –60
100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 29. Open-Loop Gain and Phase vs. Frequency
50
40 G = 100
30
G = 10
20
VSY = ±15V
TA = 25°C
10
G=1
0
–10
–20
–30
–40
–50
–60
100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 30. Closed-Loop Gain vs. Frequency
1200
1000
VSY = ±15V
TA = 25°C
800
600
400
200
0
10
G = 100 G = 10
100 1k 10k 100k
FREQUENCY (Hz)
Figure 31. ZOUT vs. Frequency
G=1
1M 10M
140
120
100
80
60
40
20
0
100
VSY = ±15V
TA = 25°C
1k
10k 100k
1M
FREQUENCY (Hz)
Figure 32. CMRR vs. Frequency
10M
100M
140
120
100
80
60
40
20
0
100
VSY = ±15V
TA = 25°C
PSRR+
PSRR–
1k
10k 100k
1M
FREQUENCY (Hz)
Figure 33. PSRR vs. Frequency
10M
100M
RLOAD = 10k
CLOAD = 10pF
VSY = ±15V
2
TIME = 10µs/DIV
Figure 34. Large Signal Transient Response
Rev. 0 | Page 16 of 20










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