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PDF ADR821 Data sheet ( Hoja de datos )
| Número de pieza | ADR821 | |
| Descripción | (ADR821 / ADR827) precision voltage reference and op amp | |
| Fabricantes | Analog Devices | |
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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.
1 page  
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ADR821/ADR827
ADR821 ELECTRICAL CHARACTERISTICS—AMPLIFIER (VS = ±15 V)
VCM= 0 V, TA = 25°C, unless otherwise noted.
Table 4.A
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 = ±2.8 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/oC
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
300
75 100
μA
μA
dB
0.5 V/μs
1.0 MHz
75.4 Degrees
0.2 μV p-p
16 nV/√Hz
Rev. 0 | Page 5 of 20
5 Page 
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TYPICAL PERFORMANCE CHARACTERISTICS
REFERENCE
2.512
2.508
CIN = 0.1µF
COUT = 0.1µF
VIN = 15V
2.504
2.500
2.496
2.492
2.488
–40 –25 –10 5 20 35 50 65 80 95
TEMPERATURE (°C)
Figure 3. ADR821 VOUT vs. Temperature
110 125
4 CIN = 0.1µF
COUT = 0.1µF
3 VIN = 15V
2
1
0
–1
–2
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
Figure 4. ADR821 Line Regulation vs. Temperature
0.40
0.35
CIN = 0.1µF
COUT = 0.1µF
0.30
+125°C
0.25
+25°C
0.20
–40°C
0.15
0.10
0.05
2.5 5.0 7.5 10.0 12.5 15.0
SUPPLY VOLTAGE (±V)
Figure 5. ADR821 Supply Current (+) vs. Supply Voltage
ADR821/ADR827
1.260
1.258
1.256
CIN = 0.1µF
COUT = 0.1µF
VIN = 15V
1.254
1.252
1.250
1.248
1.246
1.244
1.242
1.240
–40 –25 –10 5 20 35 50 65 80 95
TEMPERATURE (°C)
Figure 6. ADR827 VOUT vs. Temperature
110 125
14
CIN = 0.1µF
COUT = 0.1µF
12 VIN = 15V
10
8
6
4
2
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
Figure 7. ADR827 Line Regulation vs. Temperature
0.40
0.35
CIN = 0.1µF
COUT = 0.1µF
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 12.5 15.0
SUPPLY VOLTAGE (±V)
Figure 8. ADR827 Supply Current (+) vs. Supply Voltage
Rev. 0 | Page 11 of 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ADR821.PDF ] | |
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