Precision, 20 MHz, CMOS, Rail-to-Rail
Input/Output Operational Amplifiers
Data Sheet
FEATURES
Low offset voltage: 65 μV maximum
Single-supply operation: 2.7 V to 5.0 V
Low noise: 8 nV/√Hz
Wide bandwidth: >20 MHz
Slew rate: 12 V/μs
High output current: 150 mA
No phase reversal
Low input bias current: 1 pA
Low supply current: 2 mA
Unity-gain stable
APPLICATIONS
Barcode scanners
Battery-powered instrumentation
Multipole filters
Sensors
ASIC input or output amplifiers
Audio
Photodiode amplification
GENERAL DESCRIPTION
The AD8615/AD8616/AD8618 are single/dual/quad, rail-to-
rail, input and output, single-supply amplifiers featuring very
low offset voltage, wide signal bandwidth, and low input voltage
and current noise. The parts use a patented trimming technique
that achieves superior precision without laser trimming. The
AD8615/AD8616/AD8618 are fully specified to operate from
2.7 V to 5 V single supplies.
The combination of >20 MHz bandwidth, low offset, low noise,
and low input bias current makes these amplifiers useful in a
wide variety of applications. Filters, integrators, photodiode
amplifiers, and high impedance sensors all benefit from the
combination of performance features. AC applications benefit from
the wide bandwidth and low distortion. The AD8615/AD8616/
AD8618 offer the highest output drive capability of the DigiTrim®
family, which is excellent for audio line drivers and other low
impedance applications.
Applications for the parts include portable and low powered
instrumentation, audio amplification for portable devices,
portable phone headsets, bar code scanners, and multipole
filters. The ability to swing rail-to-rail at both the input and
output enables designers to buffer CMOS ADCs, DACs, ASICs,
and other wide output swing devices in single-supply systems.
AD8615/AD8616/AD8618
PIN CONFIGURATIONS
V+
1
OUT
AD8615
V–
2
TOP VIEW
(Not to S cale)
+IN
3
Fig
ure 1. 5-Lead TSOT-23 (UJ-5)
OUT A
1
AD8616
2
–IN A
+IN A
3
TOP VIEW
(Not to Scale)
V–
4
Fig
ure 2. 8-Lead MSOP (RM-8)
OUT A
1
–IN A
+IN A
OUT A
–IN A –IN D
+IN A +IN D
+IN B +IN C
–IN B –IN C
OUT B OUT C
Figure 4.
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B
The AD8615/AD8616
AD8616
2
3
TOP VIEW
(Not to Scale)
4
V–
Fig
ure 3. 8-Lead SOIC (R-8)
1
AD8618
V+ V–
TOP VIEW
(Not to Scale)
7
14-Lead TSSOP (RU-14)
1
2
3
AD8618
V+
4
TOP VIEW
(Not to S cale)
5
6
7
Figure 5.
14-Lead SOIC (R-14)
/AD8618 are specified over the extended
industrial temperature range (−40°C to +125°C). The AD8615
is available in 5-lead TSOT-23 package. The AD8616 is available
in 8-lead MSOP and narrow SOIC surface-mount packages; the
MSOP version is available in tape and reel only. The AD8618 is
available in 14-lead SOIC and TSSOP packages.
5
4
–IN
04648-001
V+
8
7
OUT B
–IN B
6
+IN B
5
8
7
6
5
14
8
14
13
12
11
10
9
8
V+
OUT B
–IN B
+IN B
OUT D
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
04648-002
04648-003
4648-004
04648-005
Rev. G Document Feedback
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 ©2004–2014 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
AD8615/AD8616/AD8618 Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configurations ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Applications Information .............................................................. 11
Input Overvoltage Protection ................................................... 11
REVISION HISTORY
6/14—Re v. F t o R e v. G
Changes to Input Overvoltage Protection Section ..................... 11
3/14—Re v. E t o R e v. F
Changes to Differential Input Voltage Parameter, Table 3 .......... 5
Updated Outline Dimensions ....................................................... 15
Changes to Ordering Guide .......................................................... 17
9/08—Re v. D t o R e v. E
Changes to General Description Section ...................................... 1
Updated Outline Dimensions ....................................................... 15
Changes to Ordering Guide .......................................................... 17
5/08—Rev. C to Rev. D
Changes to Layout ............................................................................ 1
Changes to Figure 38 ...................................................................... 11
Changes to Figure 44 and Figure 45 ............................................. 13
Changes to Layout .......................................................................... 15
Changes to Layout .......................................................................... 16
Output Phase Reversal ............................................................... 11
Driving Capacitive Loads .......................................................... 11
Overload Recovery Time .......................................................... 12
D/A Conversion ......................................................................... 12
Low Noise Applications ............................................................. 12
High Speed Photodiode Preamplifier ...................................... 13
Active Filters ............................................................................... 13
Power Dissipation....................................................................... 13
Power Calculations for Varying or Unknown Loads ............. 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 17
6/05—Re v. B t o R e v. C
Change to Table 1 .............................................................................. 3
Change to Table 2 .............................................................................. 4
Change to Figure 20 .......................................................................... 8
1/05—Rev. A to Rev. B
Added AD8615 ................................................................... Universal
Changes to Figure 12 ......................................................................... 8
Deleted Figure 19; Renumbered Subsequently .............................. 8
Changes to Figure 20 ......................................................................... 9
Changes to Figure 29 ...................................................................... 10
Changes to Figure 31 ...................................................................... 11
Deleted Figure 34; Renumbered Subsequently ........................... 11
Deleted Figure 35; Renumbered Subsequently ........................... 35
4/04—Re v. 0 t o R e v. A
Added AD8618 ................................................................... Universal
Updated Outline Dimensions ....................................................... 16
1/04—Revision 0: Initial Version
Rev. G | Page 2 of 20
Data Sheet AD8615/AD8616/AD8618
Offset Voltage, AD8616/AD8618
VOS
VS = 3.5 V at VCM = 0.5 V and 3.0 V
23
60
µV
Offset Voltage Drift, AD8615
3 10
µV/°C
−40°C < TA < +125°C
250
pA
IL = 10 mA
4.88
4.92 V
Closed-Loop Output Impedance
Z
f = 1 MHz, AV = 1
3
Ω
Supply Current per Amplifier
ISY
VO = 0 V
1.7 2 mA
DYNAMIC PERFORMANCE
Current Noise Density
in
f = 1 kHz
0.05 pA/√Hz
SPECIFICATIONS
VS = 5 V, VCM = VS/2, TA = 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage, AD8615 23 100 µV
VCM = 0 V to 5 V 80 500 µV
−40°C < TA < +125°C 800 µV
Offset Voltage Drift, AD8616/AD8618 ∆VOS/∆T −40°C < TA < +125°C 1.5 7 µV/°C
Input Bias Current IB 0.2 1 pA
−40°C < TA < +85°C 50 pA
−40°C < TA < +125°C 550 pA
Input Offset Current IOS 0.1 0.5 pA
−40°C < TA < +85°C 50 pA
Input Voltage Range 0 5 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 4.5 V 80 100 dB
Large Signal Voltage Gain AVO RL = 2 kΩ, VO = 0.5 V to 5 V 105 1500 V/mV
Input Capacitance C
CCM 6.7 pF
OUTPUT CHARACTERISTICS
Output Voltage High VOH IL = 1 mA 4.98 4.99 V
2.5 pF
DIFF
−40°C < TA < +125°C 4.7 V
Output Voltage Low VOL IL = 1 mA 7.5 15 mV
IL = 10 mA 70 100 mV
−40°C < TA < +125°C 200 mV
Output Current I
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 70 90 dB
−40°C < TA < +125°C 2.5 mA
Slew Rate SR RL = 2 kΩ 12 V/µs
Settling Time tS To 0.01% <0.5 µs
Gain Bandwidth Product GBP 24 MHz
Phase Margin Øm 63 Degrees
NOISE PERFORMANCE
Peak-to-Peak Noise en p-p 0.1 Hz to 10 Hz 2.4 µV
Voltage Noise Density en f = 1 kHz 10 nV/√Hz
f = 10 kHz 7 nV/√Hz
Channel Separation CS f = 10 kHz −115 dB
f = 100 kHz −110 dB
±150 mA
OUT
OUT
Rev. G | Page 3 of 20
AD8615/AD8616/AD8618 Data Sheet
VCM = 0 V to 2.7 V
80
500
µV
Large Signal Voltage Gain
AVO
RL = 2 kΩ, VO = 0.5 V to 2.2 V
55
150 V/mV
OUTPUT CHARACTERISTICS
DYNAMIC PERFORMANCE
VS = 2.7 V, VCM = VS/2, TA = 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage, AD8616/AD8618 VOS VS = 3.5 V at VCM = 0.5 V and 3.0 V 23 65 µV
Offset Voltage, AD8615 23 100 µV
−40°C < TA < +125°C 800 µV
Offset Voltage Drift, AD8616/AD8618 ∆VOS/∆T −40°C < TA < +125°C 1.5 7 µV/°C
Offset Voltage Drift, AD8615 3 10 µV/°C
Input Bias Current IB 0.2 1 pA
−40°C < TA < +85°C 50 pA
−40°C < TA < +125°C 550 pA
Input Offset Current IOS 0.1 0.5 pA
−40°C < TA < +85°C 50 pA
−40°C < TA < +125°C 250 pA
Input Voltage Range 0 2.7 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 2.7 V 80 100 dB
Input Capacitance C
2.5 pF
DIFF
CCM 7.8 pF
Output Voltage High VOH IL = 1 mA 2.65 2.68 V
−40°C < TA < +125°C 2.6 V
Output Voltage Low VOL IL = 1 mA 11 25 mV
−40°C < TA < +125°C 30 mV
Output Current I
Closed-Loop Output Impedance Z
±50 mA
OUT
f = 1 MHz, AV = 1 3 Ω
OUT
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 70 90 dB
Supply Current per Amplifier ISY VO = 0 V 1.7 2 mA
−40°C < TA < +125°C 2.5 mA
Slew Rate SR RL = 2 kΩ 12 V/µs
Settling Time tS To 0.01% <0.3 µs
Gain Bandwidth Product GBP 23 MHz
Phase Margin Øm 42 Degrees
NOISE PERFORMANCE
Peak-to-Peak Noise en p-p 0.1 Hz to 10 Hz 2.1 µV
Voltage Noise Density en f = 1 kHz 10 nV/√Hz
f = 10 kHz 7 nV/√Hz
Current Noise Density in f = 1 kHz 0.05 pA/√Hz
Channel Separation CS f = 10 kHz −115 dB
f = 100 kHz −110 dB
Rev. G | Page 4 of 20
Data Sheet AD8615/AD8616/AD8618
Junction Temperature
150°C
8-Lead SOIC (R)
158
43
°C/W
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter Rating
Supply Voltage 6 V
Input Voltage GND to VS
Differential Input Voltage ±6 V
Output Short-Circuit Duration to GND Indefinite
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −40°C to +125°C
Lead Temperature (Soldering, 60 sec) 300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, θJA is specified
for a device soldered in a circuit board for surface-mount packages.
Table 4.
Package Type θJA θJC Unit
5-Lead TSOT-23 (UJ) 207 61 °C/W
8-Lead MSOP (RM) 210 45 °C/W
14-Lead SOIC (R) 120 36 °C/W
14-Lead TSSOP (RU) 180 35 °C/W
ESD CAUTION
Rev. G | Page 5 of 20
AD8615/AD8616/AD8618 Data Sheet
0
200
600
1400
1800
2200
1000
400
1200
1600
2000
800
NUMBER OF AMPLIFIERS
–700 –500 –300 –100 100 300 500
700
OFFSET VOLTAGE (µV)
VS = 5V
T
A
= 25°C
V
CM
= 0V TO 5V
04648-006
0
2
6
14
18
22
10
4
12
16
20
8
NUMBER OF AMPLIFIERS
02
46810 12
TCV
OS
(µV/°C)
V
S
= ±2.5V
TA = –
40°C TO +125°C
VCM = 0V
04648-007
–400
–500
–300
–200
–100
0
100
200
300
400
500
INPUT OFFSET VOLTAGE (
µ
V)
0 0.5 1.0 1.5 2.0 2.5 3.0
3.5 4.0 4.5 5.0
COMMON-MODE VOLTAGE (V)
VS = 5V
T
A
= 25°C
04648-008
0
50
100
150
200
250
300
350
INPUT BIAS CURRE NT (pA)
0 25 50 75 100 125
TEMPERATURE (-
°C)
V
S
=
±
2.5V
04648-009
SINK
SOURCE
1000
100
10
1
0.1
0.001 0.01 0.1
1 10
I
LOAD
(mA)
V
SY
– V
OUT
(mV)
100
V
S
= 5V
TA = 25°C
04648-010
0
20
40
60
80
100
120
OUTPUT SATURATIONVOLT
AGE (mV)
–40 –25 –10 5 20
35 50 65 80 95 110 125
TEMPERATURE (°C)
V
S
= 5V
1mA LOAD
10mA LOAD
04648-011
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 6. Input Offset Voltage Distribution
Figure 7. Offset Voltage Drift Distribution
Figure 9. Input Bias Current vs. Temperature
Figure 10. Output Voltage to Supply Rail vs. Load Current
Figure 8. Input Offset Voltage vs. Common-Mode Voltage
(200 Units, Five Wafer Lots Including Process Skews)
Figure 11. Output Saturation Voltage vs. Temperature
Rev. G | Page 6 of 20
Loading...