a
FEATURES
Single Supply Operation: 1.8 V to 6 V
Space-Saving SOT-23, SOIC Packaging
Wide Bandwidth: 5 MHz @ 5 V, 4 MHz @ 1.8 V
Low Offset Voltage: 4 mV Max, 0.8 mV typ
Rail-to-Rail Input and Output Swing
2 V/ s Slew Rate @ 1.8 V
Only 225 A Supply Current @ 1.8 V
APPLICATIONS
Portable Communications
Portable Phones
Sensor Interface
Active Filters
PCMCIA Cards
ASIC Input Drivers
Wearable Computers
Battery-Powered Devices
New Generation Phones
Personal Digital Assistants
GENERAL DESCRIPTION
1.8 V, 5 MHz Rail-to-Rail
Low Power Operational Amplifiers
AD8631/AD8632
PIN CONFIGURATIONS
5-Lead SOT-23
(RT Suffix)
OUT A 1
V– 2
+IN A 3
4 –IN A
AD8631
5 V+
8-Lead SOIC
(R Suffix)
OUT A 1
–IN A 2
+IN A 3
V– 4
8
7
V+
OUT B
–IN B
+IN B
AD8632
6
5
8-Lead SOIC
(RM Suffix)
OUT A
–IN A
+IN A
V–
1
8
The AD8631 brings precision and bandwidth to the SOT-23-5
package at single supply voltages as low as 1.8 V and low supply
current. The small package makes it possible to place the AD8631
next to sensors, reducing external noise pickup.
The AD8631 and AD8632 are rail-to-rail input and output bipolar
amplifiers with a gain bandwidth of 4 MHz and typical voltage
offset of 0.8 mV from a 1.8 V supply. The low supply current and
the low supply voltage makes these parts ideal for battery-powered
applications. The 3 V/µs slew rate makes the AD8631/AD8632 a
good match for driving ASIC inputs, such as voice codecs.
The AD8631/AD8632 is specified over the extended industrial
(–40 C to +125 C) temperature range. The AD8631 single is
available in 5-lead SOT-23 surface-mount packages. The dual
AD8632 is available in 8-lead SOIC and
µSOIC
packages.
AD8632
4
5
V+
OUT B
–IN B
+IN B
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
AD8631/AD8632–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
(V = 5 V, V– = 0 V, V
S
CM
= 2.5 V, T
A
= 25 C unless otherwise noted)
Min
Typ
0.8
Max
4.0
6
250
500
±
150
550
5
Unit
mV
mV
nA
nA
nA
nA
V
dB
dB
V/mV
V/mV
V/mV
µV/
C
pA/ C
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Symbol
V
OS
I
B
I
OS
V
CM
CMRR
A
VO
∆V
OS
/∆T
∆I
B
/∆T
V
OH
V
OL
I
SC
PSRR
I
SY
Conditions
–40 C
≤
T
A
≤
+125 C
–40 C
≤
T
A
≤
+125 C
–40 C
≤
T
A
≤
+125 C
0 V
≤
V
CM
≤
5 V,
–40 C
≤
T
A
≤
+125 C
R
L
= 10 kΩ, 0.5 V < V
OUT
< 4.5 V
R
L
= 100 kΩ, 0.5 V < V
OUT
< 4.5 V
R
L
= 100 kΩ, –40 C
≤
T
A
≤
+125 C
0
63
56
100
100
70
25
400
3.5
400
I
L
= 100
µA
–40 C
≤
T
A
≤
+125 C
I
L
= 1 mA
I
L
= 100
µA
–40 C
≤
T
A
≤
+125 C
I
L
= 1 mA
Short to Ground, Instantaneous
V
S
= 2.2 V to 6 V,
–40 C
≤
T
A
≤
+125 C
V
OUT
= 2.5 V
–40 C
≤
T
A
≤
+125 C
1 V < V
OUT
< 4 V, R
L
= 10 kΩ
0.1%
Offset Voltage Drift
Bias Current Drift
OUTPUT CHARACTERISTICS
Output Voltage Swing High
4.965
4.7
35
200
±
10
75
72
90
300
450
650
V
V
mV
mV
mA
dB
dB
µA
µA
V/µs
MHz
ns
Degrees
µV
p-p
nV/√Hz
pA/√Hz
Output Voltage Swing Low
Short Circuit Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Settling Time
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Specifications subject to change without notice.
SR
GBP
T
S
φ
m
e
n
p-p
e
n
i
n
3
5
860
53
0.8
23
1.7
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
–2–
REV. 0
AD8631/AD8632
ELECTRICAL CHARACTERISTICS
(V = 2.2 V, V– = 0 V, V
S
CM
= 1.1 V, T
A
= 25 C unless otherwise noted)
Min
Typ
0.8
Max
4.0
6
250
±
150
2.2
Unit
mV
mV
nA
nA
V
dB
dB
V/mV
V/mV
V
V
mV
mV
µA
µA
V/µs
MHz
Degrees
nV/√Hz
pA/√Hz
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
OUTPUT CHARACTERISTICS
Output Voltage Swing High
Output Voltage Swing Low
POWER SUPPLY
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
Specifications subject to change without notice.
Symbol
V
OS
I
B
I
OS
V
CM
CMRR
A
VO
Conditions
–40 C
≤
T
A
≤
+125 C
0
54
47
50
2.165
1.9
0 V
≤
V
CM
≤
2.2 V,
–40 C
≤
T
A
≤
+125 C
R
L
= 10 kΩ, 0.5 V < V
OUT
< 1.7 V
R
L
= 100 kΩ
I
L
= 100
µA
I
L
= 750
µA
I
L
= 100
µA
I
L
= 750
µA
V
OUT
= 1.1 V
–40 C
≤
T
A
≤
+125 C
R
L
= 10 kΩ
70
25
200
V
OH
V
OL
35
200
250
350
500
I
SY
SR
GBP
φ
m
e
n
i
n
2.5
4.3
50
23
1.7
f = 1 kHz
f = 1 kHz
REV. 0
–3–
AD8631/AD8632–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
(V = 1.8 V, V– = 0 V, V
S
CM
= 0.9 V, T
A
= 25 C unless otherwise noted)
Min
Typ
0.8
Max
4.0
6
250
±
150
1.8
Unit
mV
mV
nA
nA
V
dB
V/mV
V/mV
V
V
mV
mV
dB
dB
µA
µA
V/µs
MHz
Degrees
nV/√Hz
pA/√Hz
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
OUTPUT CHARACTERISTICS
Output Voltage Swing High
Output Voltage Swing Low
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
Specifications subject to change without notice.
Symbol
V
OS
I
B
I
OS
V
CM
CMRR
A
VO
Conditions
0 C
≤
T
A
≤
125 C
0
0 V
≤
V
CM
≤
1.8 V,
0 C
≤
T
A
≤
125 C
R
L
= 10 kΩ, 0.5 V < V
OUT
< 1.3 V
R
L
= 100 kΩ, 0.5 V < V
OUT
< 1.3 V
I
L
= 100
µA
I
L
= 750
µA
I
L
= 100
µA
I
L
= 750
µA
V
S
= 1.7 V to 2.2 V,
0 C
≤
T
A
≤
125 C
V
OUT
= 0.9 V
0 C
≤
T
A
≤
125 C
R
L
= 10 kΩ
49
40
1.765
1.5
65
20
200
V
OH
V
OL
35
200
68
65
86
225
325
450
PSRR
I
SY
SR
GBP
φ
m
e
n
i
n
2
4
49
23
1.7
f = 1 kHz
f = 1 kHz
–4–
REV. 0
AD8631/AD8632
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Input Voltage
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V
S
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . .
±
0.6 V
Internal Power Dissipation
SOT-23 (RT) . . . . . . . . . . . . See Thermal Resistance Chart
SOIC (R) . . . . . . . . . . . . . . . See Thermal Resistance Chart
µSOIC
(RM) . . . . . . . . . . . . See Thermal Resistance Chart
Output Short-Circuit Duration . . . . . . . . . . . . . . . . Indefinite
Storage Temperature Range
R, RM, and RT Packages . . . . . . . . . . . . . –65 C to +150 C
Operating Temperature Range
AD8631, AD8632 . . . . . . . . . . . . . . . . . . –40 C to +125 C
Junction Temperature Range
R, RM, and RT Packages . . . . . . . . . . . . . –65 C to +150 C
Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300 C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect device reliability.
2
For supply voltages less than 6 V the input voltage is limited to the supply voltage.
Package Type
5-Lead SOT-23 (RT)
8-Lead SOIC (R)
8-Lead
µSOIC
(RM)
JA
1
JC
Unit
C/W
C/W
C/W
230
158
210
146
43
45
NOTE
1
θ
JA
is specified for worst-case conditions, i.e.,
θ
JA
is specified for device soldered
in circuit board for SOT-23 and SOIC packages.
ORDERING GUIDE
Model
Temperature
Range
Package
Description
5-Lead SOT-23
8-Lead SOIC
8-Lead
µSOIC
Package
Option
RT-5
SO-8
RM-8
Brand
AEA
AGA
AD8631ART
1
–40 C to +125 C
AD8632AR
–40 C to +125 C
2
AD8632ARM –40 C to +125 C
NOTES
1
Available in 3,000-piece reels only.
2
Available in 2,500-piece reels only.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD8631/AD8632 features proprietary ESD protection circuitry, permanent dam-
age may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
120
V
S
= 5V
V
CM
= 2.5V
T
A
= 25 C
COUNT = 1,133 OP AMPS
QUANTITY OF AMPLIFIERS
SUPPLY CURRENT – A
350
T
A
= 25 C
325
90
300
60
275
250
30
225
0
–4
–3
–2
–1
0
1
2
INPUT OFFSET VOLTAGE – mV
3
4
200
1
2
3
4
SUPPLY VOLTAGE – V
5
6
Figure 1. Input Offset Voltage Distribution
Figure 2. Supply Current per Amplifier vs. Supply Voltage
REV. 0
–5–
