ANALOG DEVICES ADA4665-2 Service Manual
16 V, 1 MHz, CMOS Rail-to-Rail
FEATURES
Lower power at high voltage: 290 μA per amplifier typical
Low input bias current: 1 pA maximum
Wide bandwidth: 1.2 MHz typical
Slew rate: 1 V/μs typical
Offset voltage drift: 3 μV/°C typical
Single-supply operation: 5 V to 16 V
Dual-supply operation: ±2.5 V to ±8 V
Unity gain stable
APPLICATIONS
Portable systems
High density power budget systems
Medical equipment
Physiological measurement
Precision references
Multipole filters
Sensors
Transimpedance amplifiers
Buffer/level shifting
Input/Output Operational Amplifier
ADA4665-2
PIN CONFIGURATIONS
1
OUT A
OUT A
ADA4665-2
–IN A
2
+IN A
–IN A
+IN A
TOP VIEW
3
(Not to Scale)
V–
4
Figure 1. 8-Lead SOIC
1
ADA4665-2
2
TOP VIEW
3
(Not to Scale)
V–
4
Figure 2. 8-Lead MSOP
8
7
6
5
8
7
6
5
V+
OUT B
–IN B
+IN B
V+
OUT B
–IN B
+IN B
07650-001
07650-002
GENERAL DESCRIPTION
The ADA4665-2 is a rail-to-rail input/output dual amplifier
optimized for lower power budget designs. The ADA4665-2
offers a low supply current of 400 μA maximum per amplifier
at 25°C and 600 μA maximum per amplifier over the extended
industrial temperature range. This feature makes the ADA4665-2
well suited for low power applications. In addition, the ADA4665-2
has a very low bias current of 1 pA maximum, low offset voltage
drift of 3 μV/°C, and bandwidth of 1.2 MHz. The combination of
these features, together with a wide supply voltage range from
5 V to 16 V, allows the device to be used in a wide variety of
other applications, including process control, instrumentation
equipment, buffering, and sensor front ends. Furthermore, its
rail-to-rail input and output swing adds to its versatility. The
ADA4665-2 is specified from −40°C to +125°C and is available
in standard SOIC and MSOP packages.
Table 1. Low Cost Rail-to-Rail Input/Output Op Amps
Supply 5 V 16 V
Single AD8541
Dual AD8542 ADA4665-2
Quad AD8544
Table 2. Other Rail-to-Rail Input/Output Op Amps
Supply 5 V 16 V 36 V
Single AD8603 AD8663
Dual AD8607 AD8667 ADA4091-2
Quad AD8609 AD8669
Rev. 0
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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.
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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 ©2009 Analog Devices, Inc. All rights reserved.
ADA4665-2
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Electrical Characteristics—16 V Operation ............................. 3
Electrical Characteristics—5 V Operation................................ 4
Absolute Maximum Ratings ............................................................ 5
REVISION HISTORY
1/09—Revision 0: Initial Version
Thermal Resistance .......................................................................5
ESD Caution...................................................................................5
Typical Performance Characteristics ..............................................6
Applications Information .............................................................. 15
Rail-to-Rail Input Operation .................................................... 15
Current Shunt Sensor ................................................................ 15
Active Filters ............................................................................... 15
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 17
Rev. 0 | Page 2 of 20
ADA4665-2
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—16 V OPERATION
VSY = 16 V, VCM = VSY/2, TA = 25°C, unless otherwise noted.
Table 3.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS V
V
−40°C ≤ TA ≤ +125°C 9 mV
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +125°C 3 μV/°C
Input Bias Current IB 0.1 1 pA
−40°C ≤ TA ≤ +125°C 200 pA
Input Offset Current IOS 0.1 1 pA
−40°C ≤ TA ≤ +125°C 40 pA
Input Voltage Range −40°C ≤ TA ≤ +125°C 0 16 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 16 V 55 75 dB
−40°C ≤ TA ≤ +125°C 50 dB
Large Signal Voltage Gain AVO R
−40°C ≤ TA ≤ +125°C 75 dB
Input Resistance RIN 4 GΩ
Input Capacitance, Differential Mode C
Input Capacitance, Common Mode C
2 pF
INDM
7 pF
INCM
OUTPUT CHARACTERISTICS
Output Voltage High VOH R
−40°C ≤ TA ≤ +125°C 15.9 V
R
−40°C ≤ TA ≤ +125°C 15.8 V
Output Voltage Low VOL R
−40°C ≤ TA ≤ +125°C 15 mV
R
−40°C ≤ TA ≤ +125°C 150 mV
Short-Circuit Current ISC ±30 mA
Closed-Loop Output Impedance Z
f = 100 kHz, AV = 1 100 Ω
OUT
POWER SUPPLY
Power Supply Rejection Ratio PSRR VSY = 5 V to 16 V 70 95 dB
−40°C ≤ TA ≤ +125°C 65 dB
Supply Current per Amplifier ISY I
−40°C ≤ TA ≤ +125°C 600 μA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ, CL = 50 pF, AV = 1 1 V/μs
Settling Time to 0.1% tS V
Gain Bandwidth Product GBP RL = 10 kΩ, CL = 50 pF, AV = 1 1.2 MHz
Phase Margin ΦM R
NOISE PERFORMANCE
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 3 μV p-p
Voltage Noise Density en f = 1 kHz 32 nV/√Hz
f = 10 kHz 27 nV/√Hz
Current Noise Density in f = 1 kHz 50 fA/√Hz
= 16 V 1 4 mV
CM
= 0 V to 16 V 1 6 mV
CM
= 10 kΩ, VO = 0.5 V to 15 V 85 100 dB
L
= 100 kΩ to VCM 15.95 15.99 V
L
= 10 kΩ to VCM 15.9 15.95 V
L
= 100 kΩ to VCM 4 7.5 mV
L
= 10 kΩ to VCM 40 75 mV
L
= 0 mA 290 400 μA
O
= 1 V step, RL = 2 kΩ, CL = 50 pF 6.5 μs
IN
= 10 kΩ, CL = 50 pF, AV = 1 50 Degrees
L
Rev. 0 | Page 3 of 20
ADA4665-2
ELECTRICAL CHARACTERISTICS—5 V OPERATION
VSY = 5 V, VCM = VSY/2, TA = 25°C, unless otherwise noted.
Table 4.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS V
V
−40°C ≤ TA ≤ +125°C 9 mV
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +125°C 3 μV/°C
Input Bias Current IB 0.1 1 pA
−40°C ≤ TA ≤ +125°C 100 pA
Input Offset Current IOS 0.1 1 pA
−40°C ≤ TA ≤ +125°C 10 pA
Input Voltage Range −40°C ≤ TA ≤ +125°C 0 5 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 55 75 dB
−40°C ≤ TA ≤ +125°C 50 dB
Large Signal Voltage Gain AVO R
−40°C ≤ TA ≤ +125°C 75 dB
Input Resistance RIN 1 GΩ
Input Capacitance, Differential Mode C
Input Capacitance, Common Mode C
2 pF
INDM
7 pF
INCM
OUTPUT CHARACTERISTICS
Output Voltage High VOH R
−40°C ≤ TA ≤ +125°C 4.9 V
R
−40°C ≤ TA ≤ +125°C 4.8 V
Output Voltage Low VOL R
−40°C ≤ TA ≤ +125°C 10 mV
R
−40°C ≤ TA ≤ +125°C 100 mV
Short-Circuit Current ISC ±8 mA
Closed-Loop Output Impedance Z
f = 100 kHz, AV = 1 100 Ω
OUT
POWER SUPPLY
Power Supply Rejection Ratio PSRR VSY = 5 V to 16 V 70 95 dB
−40°C ≤ TA ≤ +125°C 65 dB
Supply Current per Amplifier ISY I
−40°C ≤ TA ≤ +125°C 600 μA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ, CL = 50 pF, AV = 1 1 V/μs
Settling Time to 0.1% tS V
Gain Bandwidth Product GBP RL = 10 kΩ, CL = 50 pF, AV = 1 1.2 MHz
Phase Margin ΦM R
NOISE PERFORMANCE
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 3 μV p-p
Voltage Noise Density en f = 1 kHz 32 nV/√Hz
f = 10 kHz 27 nV/√Hz
Current Noise Density in f = 1 kHz 50 fA/√Hz
= 5 V 1 4 mV
CM
= 0 V to 5 V 1 6 mV
CM
= 10 kΩ, VO = 0.5 V to 4.5 V 85 100 dB
L
= 100 kΩ to VCM 4.95 4.99 V
L
= 10 kΩ to VCM 4.9 4.96 V
L
= 100 kΩ to VCM 3 5 mV
L
= 10 kΩ to VCM 30 50 mV
L
= 0 mA 270 350 μA
O
= 1 V step, RL = 2 kΩ, CL = 50 pF 6.5 μs
IN
= 10 kΩ, CL = 50 pF, AV = 1 50 Degrees
L
Rev. 0 | Page 4 of 20
ADA4665-2
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter Rating
Supply Voltage 16.5 V
Input Voltage1 GND − 0.3 V to VSY + 0.3 V
Input Current ±10 mA
Differential Input Voltage ±VSY
Output Short-Circuit Duration to GND Indefinite
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −40°C to +125°C
Junction Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C
1
The input pins have clamp diodes to the power supply pins.
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, a device
soldered in a circuit board for surface-mount packages. This
value was measured using a 4-layer JEDEC standard printed
circuit board.
Table 6. Thermal Resistance
Package Type θJA θ
8-Lead SOIC_N (R-8) 158 43 °C/W
8-Lead MSOP (RM-8) 186 52 °C/W
Unit
JC
ESD CAUTION
Rev. 0 | Page 5 of 20
ADA4665-2
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
70
60
VSY = 5V
V
= VSY/2
CM
70
60
VSY = 16V
V
= VSY/2
CM
50
40
30
20
NUMBER OF AMPLIFIERS
10
0
–6 –5 –4 –3 –2 –1 0123456
V
(mV)
OS
Figure 3. Input Offset Voltage Distribution
10
9
8
7
6
5
4
3
NUMBER OF AMPLIFIERS
2
1
0
01234 5678910
TCV
OS
(µV/°C)
VSY = 5V
–40°C ≤ T
≤ +125°C
A
Figure 4. Input Offset Voltage Drift Distribution
50
40
30
20
NUMBER OF AMPLIFIERS
10
0
–6 –5 –4 –3 –2 –1 01 23456
07650-006
(mV)
V
OS
07650-003
Figure 6. Input Offset Voltage Distribution
10
9
8
7
6
5
4
3
NUMBER OF AMPLIFIERS
2
1
0
012345678910
07650-007
TCV
OS
(µV/°C)
VSY = 16V
–40°C ≤ T
≤ +125°C
A
07650-004
Figure 7. Input Offset Voltage Drift Distribution
5
4
3
2
1
(mV)
OS
0
V
–1
–2
–3
–4
01 2 3 4 5
(V)
V
CM
VSY = 5V
Figure 5. Input Offset Voltage vs. Common-Mode Voltage
07650-008
5
4
3
2
1
(mV)
OS
0
V
–1
–2
–3
–4
0 2 4 6 8 10 12 14 16
(V)
V
CM
VSY = 16V
Figure 8. Input Offset Voltage vs. Common-Mode Voltage
0-005
0765
Rev. 0 | Page 6 of 20
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