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1.8 V Low Power CMOS Rail-to-Rail
Input/Output Operational Amplifier
AD8515
FEATURES
Single-supply operation: 1.8 V to 5 V
Offset voltage: 6 mV maximum
Space-saving SOT-23 and SC70 packages
Slew rate: 2.7 V/μs
Bandwidth: 5 MHz
Rail-to-rail input and output swing
Low input bias current: 2 pA typical
Low supply current @ 1.8 V: 450 μA maximum
PIN CONFIGURATION
OUT
1
V–
2
5
V+
AD8515
03024-001
TOP VIEW
+IN
3
(Not to Scale)
4
–IN
Figure 1. 5-Lead SC70 and 5-Lead SOT-23
(KS and RJ Suffixes)
APPLICATIONS
Portable communications
Portable phones
Sensor interfaces
Laser scanners
PCMCIA cards
Battery-powered devices
New generation phones
Personal digital assistants
GENERAL DESCRIPTION
The AD8515 is a rail-to-rail amplifier that can operate from
a single-supply voltage as low as 1.8 V.
The AD8515 single amplifier, available in 5-lead SOT-23 and 5-lead
SC70 packages, is small enough to be placed next to sensors,
reducing external noise pickup.
The AD8515 is a rail-to-rail input and output amplifier with
a gain bandwidth of 5 MHz and typical offset voltage of 1 mV
from a 1.8 V supply. The low supply current makes these parts
ideal for battery-powered applications. The 2.7 V/μs slew rate
makes the AD8515 a good match for driving ASIC inputs such
as voice codecs.
The AD8515 is specified over the extended industrial
temperature range of −40°C to +125°C.
Rev. D
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.
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 ©2002–2007 Analog Devices, Inc. All rights reserved.
AD8515
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Pin Configuration............................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics............................................................. 3
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution.................................................................................. 6
Typical Performance Characteristics ..............................................7
Theory of Operation ...................................................................... 12
Power Consumption vs. Bandwidth ........................................ 12
Driving Capacitive Loads .............................................................. 13
Full Power Bandwidth ............................................................... 13
A Micropower Reference Voltage Generator.............................. 14
A 100 kHz Single-Supply Second-Order Band-Pass Filter ... 14
Wien Bridge Oscillator .............................................................. 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 16
REVISION HISTORY
7/07—Rev. C to Rev. D
Updated Format..................................................................Universal
Updated Package Designator Throughout.................................... 1
Changes to Table 1, Supply Current/Amplifier ............................ 3
Changes to Table 2, Supply Current/Amplifier ............................ 4
Changes to Table 3, Large Signal Voltage Gain, Power Supply
Rejection Ratio, and Supply Current/Amplifier........................... 5
Changes to Figure 10........................................................................ 8
Changes to Figure 35...................................................................... 14
Updated Outline Dimensions ....................................................... 16
Changes to Ordering Guide .......................................................... 16
3/05—Rev. B to Rev. C
Changes to Specifications ................................................................ 2
Changes to Ordering Guide ............................................................ 5
4/03—Rev. A to Rev. B
Change to Figure 5 ......................................................................... 12
2/03—Rev. 0 to Rev. A
Added new SC70 Package .................................................Universal
Changes to Features ..........................................................................1
Changes to General Description .....................................................1
Changes to Pin Configuration .........................................................1
Changes to Specifications.................................................................2
Changes to Absolute Maximum Ratings........................................5
Changes to Ordering Guide .............................................................5
Changes to TPC 3..............................................................................6
Changes to TPC 10............................................................................7
Changes to TPC 13............................................................................8
Changes to TPC 27......................................................................... 10
Changes to TPC 28......................................................................... 10
Added new TPC 29 ........................................................................ 10
Changes to Functional Description ............................................. 11
Updated to Outline Dimensions .................................................. 14
8/02—Revision. 0: Initial Version
Rev. D | Page 2 of 16
AD8515
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
S
= 1.8 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Symbol
V
OS
I
B
Conditions
V
CM
= V
S
/2
−40°C < T
A
< +125°C
V
S
= 1.8 V
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Short Circuit Limit
POWER SUPPLY
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
CMRR
A
VO
ΔV
OS
/ΔT
V
OH
V
OL
I
SC
I
SY
V
OUT
= V
S
/2
–40°C < T
A
< +125°C
R
L
= 10 kΩ
0 V ≤ V
CM
≤ 1.8 V
−40°C < T
A
< +125°C
R
L
= 100 kΩ, 0.3 V ≤ V
OUT
≤ 1.5 V
0
50
47
110
Min
Typ
1
2
Max
6
8
30
600
8
10
500
1.8
Unit
mV
mV
pA
pA
nA
pA
pA
V
dB
dB
V/mV
μV/°C
V
V
mV
mV
mA
μA
μA
V/μs
MHz
nV/√Hz
nV/√Hz
pA/√Hz
Input Offset Current
I
OS
1
400
4
I
L
= 100 μA, −40°C < T
A
< +125°C
I
L
= 750 μA, −40°C < T
A
< +125°C
I
L
= 100 μA, −40°C < T
A
< +125°C
I
L
= 750 μA, −40°C < T
A
< +125°C
1.79
1.77
10
30
20
325
450
500
SR
GBP
e
n
i
n
2.7
5
22
20
0.05
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. D | Page 3 of 16
AD8515
V
S
= 3.0 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Symbol
V
OS
I
B
Conditions
V
CM
= V
S
/2
−40°C < T
A
< +125°C
V
S
= 3.0 V
−40°C < T
A
< +85°C
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
CMRR
A
VO
ΔV
OS
/ΔT
V
OH
V
OL
0 V ≤ V
CM
≤ 3.0 V
−40°C < T
A
< +125°C
R
L
= 100 kΩ, 0.3 V ≤ V
OUT
≤ 2.7 V
0
54
50
250
Min
Typ
1
2
Max
6
8
30
600
8
10
500
3
Unit
mV
mV
pA
pA
nA
pA
pA
V
dB
dB
V/mV
μV/°C
V
V
mV
mV
dB
dB
μA
μA
V/μs
MHz
nV/√Hz
nV/√Hz
pA/√Hz
Input Offset Current
I
OS
1
1000
4
I
L
= 100 μA, −40°C < T
A
< +125°C
I
L
= 750 μA, −40°C < T
A
< +125°C
I
L
= 100 μA, −40°C < T
A
< +125°C
I
L
= 750 μA, −40°C < T
A
< +125°C
V
S
= 1.8 V to 5.0 V
−40°C < T
A
< +125°C
V
OUT
= V
S
/2
−40°C < T
A
< +125°C
R
L
= 10 kΩ
2.99
2.98
10
20
65
57
85
80
350
PSRR
I
SY
450
500
SR
GBP
e
n
i
n
2.7
5
22
20
0.05
f = 1 kHz
f = 10 kHz
f = 1 kHz
Rev. D | Page 4 of 16
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