Data Sheet
FEATURES
Low offset voltage: 1 μV
Input offset drift: 0.005 μV/°C
Rail-to-rail input and output swing
5 V/2.7 V single-supply operation
High gain, CMRR, PSRR: 130 dB
Ultralow input bias current: 20 pA
Low supply current: 700 μA/op amp
Overload recovery time: 50 μs
No external capacitors required
Zero-Drift, Single-Supply, Rail-to-Rail
Input/Output Operational Amplifiers
AD8551/AD8552/AD8554
PIN CONFIGURATIONS
NC
–IN A
+IN A
V–
1
8
AD8551
4
5
NC = NO CONNECT
Figure 1. 8-Lead MSOP (RM Suffix)
8 NC
NC 1
–IN A 2
+IN A 3
V– 4
AD8551
7 V+
6 OUT A
01101-002
APPLICATIONS
Temperature sensors
Pressure sensors
Precision current sensing
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
5 NC
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R Suffix)
OUT A
–IN A
+IN A
V–
1
8
V+
OUT B
–IN B
+IN B
AD8552
4
5
Figure 3. 8-Lead TSSOP (RU Suffix)
GENERAL DESCRIPTION
This family of amplifiers has ultralow offset, drift, and bias
current. The
AD8551, AD8552,
and
AD8554
are single, dual,
and quad amplifiers featuring rail-to-rail input and output swings.
All are guaranteed to operate from 2.7 V to 5 V with a single supply.
The
AD8551/AD8552/AD8554
provide the benefits previously
found only in expensive auto-zeroing or chopper-stabilized
amplifiers. Using Analog Devices, Inc. topology, these new
zero-drift amplifiers combine low cost with high accuracy. No
external capacitors are required.
With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the
AD8551/AD8552/AD8554
are perfectly suited for applications
in which error sources cannot be tolerated. Temperature,
position and pressure sensors, medical equipment, and strain
gage amplifiers benefit greatly from nearly zero drift over their
operating temperature range. The rail-to-rail input and output
swings provided by the
AD8551/AD8552/AD8554
make both
high-side and low-side sensing easy.
The
AD8551/AD8552/AD8554
are specified for the extended
industrial/automotive temperature range (−40°C to +125°C).
The
AD8551
single amplifier is available in 8-lead MSOP and
8-lead narrow SOIC packages. The
AD8552
dual amplifier is
available in 8-lead narrow SOIC and 8-lead TSSOP surface-
mount packages. The
AD8554
quad is available in 14-lead
narrow SOIC and 14-lead TSSOP packages.
Rev. F
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Technical Support
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OUT A 1
–IN A 2
+IN A 3
V– 4
8 V+
AD8552
7 OUT B
01101-004
6 –IN B
5 +IN B
Figure 4. 8-Lead SOIC (R Suffix)
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
1
14
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
AD8554
7
8
Figure 5. 14-Lead TSSOP (RU Suffix)
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
14 OUT D
13 –IN D
12 +IN D
AD8554
11 V–
10 +IN C
01101-006
9 –IN C
8 OUT C
Figure 6. 14-Lead SOIC (R Suffix)
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.
01101-005
01101-003
01101-001
NC
V+
OUT A
NC
AD8551/AD8552/AD8554
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configurations ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings............................................................ 5
Thermal Characteristics .............................................................. 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Functional Description .................................................................. 14
Amplifier Architecture .............................................................. 14
Basic Auto-Zero Amplifier Theory .......................................... 14
High Gain, CMRR, PSRR .......................................................... 15
Maximizing Performance Through Proper Layout ............... 16
Data Sheet
1/f Noise Characteristics ........................................................... 16
Intermodulation Distortion ...................................................... 17
Broadband and External Resistor Noise Considerations ...... 18
Output Overdrive Recovery...................................................... 18
Input Overvoltage Protection ................................................... 18
Output Phase Reversal ............................................................... 18
Capacitive Load Drive ............................................................... 19
Power-Up Behavior .................................................................... 19
Applications Information .............................................................. 20
A 5 V Precision Strain Gage Circuit ........................................ 20
3 V Instrumentation Amplifier ................................................ 20
A High Accuracy Thermocouple Amplifier ........................... 21
Precision Current Meter ............................................................ 21
Precision Voltage Comparator.................................................. 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 24
REVISION HISTORY
6/15—Rev. E to Rev. F
Change to Input Voltage Parameter, Table 3 ................................. 5
11/12—Rev.D to Rev. E
Changes to Figure 68 ...................................................................... 21
Updated Outline Dimensions (RM-8) ......................................... 22
Changes to Ordering Guide .......................................................... 24
9/08—Rev. C to Rev. D
Changes to Ordering Guide .......................................................... 23
3/07—Rev. B to Rev. C
Changes to Specifications Section ...................................................3
2/07—Rev. A to Rev. B
Updated Format .................................................................. Universal
Changes to Figure 54...................................................................... 16
Deleted Spice Model Section ........................................................ 19
Deleted Figure 63, Renumbered Sequentially ............................ 19
Changes to Ordering Guide .......................................................... 24
11/02—Rev. 0 to Rev. A
Edits to Figure 60 ............................................................................ 16
Updated Outline Dimensions ....................................................... 20
Rev. F | Page 2 of 24
Data Sheet
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
S
= 5 V, V
CM
= 2.5 V, V
O
= 2.5 V, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
AD8551/AD8554
AD8552
AD8552
Input Offset Current
AD8551/AD8554
AD8552
AD8552
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
1
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Symbol
V
OS
−40°C ≤ T
A
≤ +125°C
I
B
−40°C ≤ T
A
≤ +125°C
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
I
OS
−40°C ≤ T
A
≤ +125°C
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
CMRR
A
VO
ΔV
OS
/ΔT
V
OH
V
CM
= 0 V to +5 V
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ, V
O
= 0.3 V to 4.7 V
−40°C ≤ T
A
≤ +125°C
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to GND
R
L
= 100 kΩ to GND @ −40°C to +125°C
R
L
= 10 kΩ to GND
R
L
= 10 kΩ to GND @ −40°C to +125°C
R
L
= 100 kΩ to V+
R
L
= 100 kΩ to V+ @ −40°C to +125°C
R
L
= 10 kΩ to V+
R
L
= 10 kΩ to V+ @ −40°C to +125°C
−40°C to +125°C
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Overload Recovery Time
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
1
AD8551/AD8552/AD8554
Conditions
Min
Typ
1
10
1.0
160
2.5
20
150
30
150
Max
5
10
50
1.5
300
4
70
200
150
400
5
Unit
μV
μV
pA
nA
pA
nA
pA
pA
pA
pA
V
dB
dB
dB
dB
μV/°C
V
V
V
V
mV
mV
mV
mV
mA
mA
mA
mA
dB
dB
μA
μA
V/μs
ms
MHz
μV p-p
μV p-p
nV/√Hz
fA/√Hz
0
120
115
125
120
140
130
145
135
0.005
4.998
4.997
4.98
4.975
1
2
10
15
±50
±40
±30
±15
130
130
850
1000
0.4
0.05
1.5
1.0
0.32
42
2
0.04
4.99
4.99
4.95
4.95
Output Voltage Low
V
OL
10
10
30
30
Output Short-Circuit Limit Current
I
SC
I
O
−40°C to +125°C
PSRR
I
SY
V
S
= 2.7 V to 5.5 V
−40°C ≤ T
A
≤ +125°C
V
O
= 0 V
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ
±25
120
115
975
1075
SR
GBP
e
n
p-p
e
n
p-p
e
n
i
n
0.3
0 Hz to 10 Hz
0 Hz to 1 Hz
f = 1 kHz
f = 10 Hz
Gain testing is dependent upon test bandwidth.
Rev. F | Page 3 of 24
AD8551/AD8552/AD8554
V
S
= 2.7 V, V
CM
= 1.35 V, V
O
= 1.35 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
AD8551/AD8554
AD8552
AD8552
Input Offset Current
AD8551/AD8554
AD8552
AD8552
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
1
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Symbol
V
OS
−40°C ≤ T
A
≤ +125°C
I
B
−40°C ≤ T
A
≤ +125°C
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
I
OS
−40°C ≤ T
A
≤ +125°C
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
CMRR
A
VO
ΔV
OS
/ΔT
V
OH
V
CM
= 0 V to 2.7 V
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ, V
O
= 0.3 V to 2.4 V
−40°C ≤ T
A
≤ +125°C
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to GND
R
L
= 100 kΩ to GND @ −40°C to +125°C
R
L
= 10 kΩ to GND
R
L
= 10 kΩ to GND @ −40°C to +125°C
R
L
= 100 kΩ to V+
R
L
= 100 kΩ to V+ @ −40°C to +125°C
R
L
= 10 kΩ to V+
R
L
= 10 kΩ to V+ @ −40°C to +125°C
−40°C to +125°C
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Overload Recovery Time
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
1
Data Sheet
Conditions
Min
Typ
1
10
1.0
160
2.5
10
150
30
150
Max
5
10
50
1.5
300
4
50
200
150
400
2.7
Unit
μV
μV
pA
nA
pA
nA
pA
pA
pA
pA
V
dB
dB
dB
dB
μV/°C
V
V
V
V
mV
mV
mV
mV
mA
mA
mA
mA
dB
dB
μA
μA
V/μs
ms
MHz
μV p-p
nV/√Hz
fA/√Hz
0
115
110
110
105
130
130
140
130
0.005
2.697
2.696
2.68
2.675
1
2
10
15
±15
±10
±10
±5
130
130
750
950
0.5
0.05
1
1.6
75
2
0.04
2.685
2.685
2.67
2.67
Output Voltage Low
V
OL
10
10
20
20
Short-Circuit Limit
I
SC
I
O
−40°C to +125°C
PSRR
I
SY
V
S
= 2.7 V to 5.5 V
−40°C ≤ T
A
≤ +125°C
V
O
= 0 V
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ
±10
120
115
900
1000
SR
GBP
e
n
p-p
e
n
i
n
0 Hz to 10 Hz
f = 1 kHz
f = 10 Hz
Gain testing is dependent upon test bandwidth.
Rev. F | Page 4 of 24
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
1
ESD (Human Body Model)
Output Short-Circuit Duration to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature Range
(Soldering, 60 sec)
1
AD8551/AD8552/AD8554
THERMAL CHARACTERISTICS
Rating
6V
GND −0.3 V to V
S
+ 0.3 V
±5.0 V
2000 V
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
Table 4.
Package Type
8-Lead MSOP (RM)
8-Lead TSSOP (RU)
8-Lead SOIC (R)
14-Lead TSSOP (RU)
14-Lead SOIC (R)
θ
JA
190
240
158
180
120
θ
JC
44
43
43
36
36
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
ESD CAUTION
Differential input voltage is limited to ±5.0 V or the supply voltage,
whichever is less.
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Rev. F | Page 5 of 24
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