©2018 Advanced Linear Devices, Inc., Vers. 2.2 www.aldinc.com 1 of 9
DUAL MICROPOWER PRECISION RAIL-TO-RAIL CMOS OPERATIONAL AMPLIFIER
ALD2711A/ALD2711B
ALD2711
ADVANCED
LINEAR
DEVICES, INC.
Operating Temperature Range
0°C to +70°C0°C to +70°C -55°C to 125°C
8-Pin 8-Pin 8-Pin
Small Outline Plastic Dip CERDIP
Package (SOIC) Package Package
ALD2711ASAL ALD2711APAL ALD2711ADA
ALD2711BSAL ALD2711BPAL ALD2711BDA
ALD2711SAL ALD2711PAL ALD2711DA
* Contact factory for leaded (non-RoHS) or high temperature versions.
ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS))
GENERAL DESCRIPTION
The ALD2711A/ALD2711B/ALD2711 is a dual monolithic CMOS
micropower precision high slew rate operational amplifier intended for
a broad range of analog applications using ±1V to ±5V dual power
supply systems, as well as +2V to +10V battery operated systems. All
device characteristics are specified for +5V single supply or ±2.5V
dual supply systems. Typical supply current is 200µA at 5V supply
voltage. It is manufactured with Advanced Linear Devices' enhanced
ACMOS silicon gate CMOS process.
The ALD2711A/ALD2711B/ALD2711 has been developed specifically
for the +5V single supply or ±1V to ±5V dual supply user and has an
input stage that operates to +300mV above and -300mV below the
supply voltages with no adverse effects and/or phase reversals.
Several important characteristics of the device make application easier
to implement at those voltages. First, each operational amplifier can
operate with rail to rail input and output voltages. This means the
signal input voltage and output voltage can be at the positive and
negative supply voltages. This feature allows numerous analog serial
stages and flexibility in input signal bias levels. Second, each device
was designed to accommodate mixed applications where digital and
analog circuits may operate off the same power supply or battery.
Third, the output stage can typically drive up to 50pF capacitive and
10KΩ resistive loads.
These features, combined with extremely low input currents, high open
loop voltage gain, high useful bandwidth, and slew rate make the
ALD2711A/ALD2711B/ALD2711 a versatile, micropower operational
amplifier.
The ALD2711A/ALD2711B/ALD2711 with on-chip offset voltage trimming
allows the device to be used without nulling in most applications.
Additionally, robust design and rigorous screening make this device
especially suitable for operation in temperature-extreme environments and
rugged conditions.
The unique characteristics of the ALD2711A/ALD2711B/ALD2711 are
modeled in an available macromodel.
FEATURES
• Designed and characterized for 5V operation
• Linear mode operation with input voltages
300mV beyond supply rails
• Output voltages to within 2mV of power supply
rails when driving a high impedance load
• Unity gain stable
• Extremely low input bias currents -- 0.01pA
• Dual power supply ±1.0V to ±5.0V
• Single power supply +2V to +10V
• High voltage gain
• Output short circuit protected
• Unity gain bandwidth of 0.7MHz
• Slew rate of 0.7V/µs
• Low power dissipation
• Symmetrical complementary output drive
• Suitable for rugged, temperature-extreme
environments
APPLICATIONS
• Voltage follower/buffer/amplifier
• Charge integrator
• Photodiode amplifier
• Data acquisition systems
• High performance portable
instruments
• Signal conditioning circuits
• Sensor and transducer amplifiers
• Low leakage amplifiers
• Active filters
• Sample/Hold amplifier
• Picoammeter
• Current to voltage converter
PIN CONFIGURATION
TOP VIEW
SAL, PAL, DA PACKAGES
1
2
3
4
8
7
6
5
OUT A
-IN A
+IN A
V+
-IN B
+IN B
V-
OUT B
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 2 of 9
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V+ 10.6V
Differential input voltage range -0.3V to V+ +0.3V
Power dissipation 600 mW
Operating temperature range SAL, PAL packages 0°C to +70°C
DA package -55°C to +125°C
Storage temperature range -65°C to +150°C
Lead temperature, 10 seconds +260°C
CAUTION: ESD Sensitive Device. Use static control procedures in ESD controlled environment.
Supply VS±1.0 ±5.0 ±1.0 ±5.0 ±1.0 ±5.0 V Dual Supply
Voltage V+2.0 10.0 2.0 10.0 2.0 10.0 V Single Supply
Input Offset VOS 0.25 1.0 0.5 1.4 0.8 1.9 mV RS ≤ 100KΩ
Voltage 1.4 1.9 2.4 mV 0°C ≤ TA ≤ +70°C
Input Offset IOS 0.01 10 0.01 10 0.01 10 pA TA = 25°C
Current 280 280 280 pA 0°C ≤ TA ≤ +70°C
Input Bias IB0.01 10 0.01 10 0.01 10 pA TA = 25°C
Current 280 280 280 pA 0°C ≤ TA ≤ +70°C
Input Voltage VIR -0.3 5.3 -0.3 5.3 -0.3 5.3 V V+ = +5V
Range -2.8 2.8 -2.8 2.8 -2.8 2.8 V VS = ±2.5V
Input RIN 1013 1013 1013 Ω
Resistance
Input Offset TCVOS 557µV/°CR
S ≤ 100KΩ
Voltage Drift
Power Supply PSRR 63 90 63 90 60 90 dB RS ≤ 100KΩ
Rejection Ratio 63 90 63 90 60 90 dB 0°C ≤ TA ≤ +70°C
Common Mode CMRR 63 90 63 90 60 90 dB RS ≤ 100KΩ
Rejection Ratio 63 90 63 90 60 90 dB 0°C ≤ TA ≤ +70°C
Large Signal AV15 100 15 100 10 100 V/mV RL = 100KΩ
Voltage Gain 300 300 300 V/mV RL ≥ 1MΩ
10 10 7 V/mV RL = 100KΩ
0°C ≤ TA ≤ +70°C
Output VO low 0.001 0.01 0.001 0.01 0.001 0.01 V RL = 1MΩ V+= +5V
Voltage VO high 4.99 4.999 4.99 4.999 4.99 4.999 V 0°C ≤ TA ≤ +70°C
Range VO low -2.48 -2.40 -2.48 -2.40 -2.48 -2.40 V RL = 100KΩ
VO high 2.40 2.48 2.40 2.48 2.40 2.48 V 0°C ≤ TA ≤ +70°C
Output Short ISC 111mA
Circuit Current
Supply IS200 450 200 450 200 450 µAV
IN = 0V
Current No Load
Power PD1.0 2.25 1.0 2.25 1.0 2.25 VS = ±2.5V Both
Dissipation 0.25 0.6 0.25 0.6 0.25 0.6 mW VS = ±1.0V amplifiers
OPERATING ELECTRICAL CHARACTERISTICS
TA = 25°C VS = ±2.5V unless otherwise specified
2711A 2711B 2711
Parameter Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 3 of 9
OPERATING ELECTRICAL CHARACTERISTICS (cont'd)
Power Supply PSRR 100 100 100 dB RS ≤ 100KΩ
Rejection Ratio
Common Mode CMRR 100 100 100 dB RS ≤ 100KΩ
Rejection Ratio
Large Signal AV300 300 300 V/mV RL = 100KΩ
Voltage Gain
Output Voltage VO low -4.98 -4.90 -4.98 -4.90 -4.98 -4.90 V RL = 100KΩ
Range VO high 4.90 4.98 4.90 4.98 4.90 4.98 V
Bandwidth BW1.0 1.0 1.0 MHz
Slew Rate SR1.0 1.0 1.0 V/µsA
V = +1
CL = 50pF
TA = 25°C VS = ±5.0V unless otherwise specified
2711A 2711B 2711
Parameter Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
Input
Capacitance CIN 111pF
Bandwidth BW700 700 700 KHz
Slew Rate SR0.7 0.7 0.7 V/µsA
V = +1
RL = 100KΩ
Rise time tr0.2 0.2 0.2 µsR
L = 100KΩ
Overshoot 20 20 20 % RL = 100KΩ
Factor CL = 50pF
Settling ts10.0 10.0 10.0 µs 0.1% AV = 100
Time RL = 100KΩ
CL = 50pF
Channel CS140 140 140 dB AV = 100
Separation
TA = 25°C VS = ±2.5V unless otherwise specified
2711A 2711B 2711
Parameter Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
VS = ±2.5V -55°C ≤ TA ≤ +125°C unless otherwise specified
2711ADA 2711BDA 2711DA
Parameter Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
Input Offset VOS 2.2 2.7 3.2 mV RS ≤ 100KΩ
Voltage
Input Offset IOS 44 4nA
Current
Input Bias IB44 4nA
Current
Power Supply PSRR 60 85 60 85 60 85 dB RS ≤ 100KΩ
Rejection Ratio
Common Mode CMRR 60 83 60 83 60 83 dB RS ≤ 100KΩ
Rejection Ratio
Large Signal AV 10 50 10 50 10 50 V/mV RL ≤ 100KΩ
Voltage Gain
Output Voltage VO low -2.47 -2.40 -2.47 -2.40 -2.47 -2.40 V
Range VO high 2.35 2.45 2.35 2.45 2.35 2.45 V RL ≤ 100KΩ
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 4 of 9
TYPICAL PERFORMANCE CHARACTERISTICS
OPEN LOOP VOLTAGE GAIN AS A
FUNCTION OF LOAD RESISTANCE
10M
LOAD RESISTANCE (Ω)
10K 100K 1M
1000
100
10
1
OPEN LOOP VOLTAGE
GAIN (V/mV)
V
S
= ±2.5V
T
A
= 25°C
COMMON MODE INPUT VOLTAGE RANGE
AS A FUNCTION OF SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
COMMON MODE INPUT
VOLTAGE RANGE (V)
±7
±6
±5
±4
±3
±2
±1
0
0 ±1 ±2 ±3 ±4 ±5 ±6 ±7
TA = 25°C
Design & Operating Notes:
1. The ALD2711A/ALD2711B/ALD2711 CMOS operational amplifier
uses a 3 gain stage architecture and an improved frequency
compensation scheme to achieve large voltage gain, high output
driving capability, and better frequency stability. In a conventional
CMOS operational amplifier design, compensation is achieved with
a pole splitting capacitor together with a nulling resistor. This method
is, however, very bias dependent and thus cannot accommodate the
large range of supply voltage operation as is required from a stand
alone CMOS operational amplifier. The ALD2711A/ALD2711B/
ALD2711 is internally compensated for unity gain stability using a
novel scheme that does not use a nulling resistor. This scheme
produces a clean single pole roll off in the gain characteristics while
providing for more than 70 degrees of phase margin at the unity gain
frequency.
2. The ALD2711A/ALD2711B/ALD2711 has complementary p-channel
and n-channel input differential stages connected in parallel to
accomplish rail to rail input common mode voltage range. This means
that with the ranges of common mode input voltage close to the power
supplies, one of the two differential stages is switched off internally.
To maintain compatibility with other operational amplifiers, this
switching point has been selected to be about 1.5V below the positive
supply voltage. Since offset voltage trimming on the ALD2711A/
ALD2711B/ALD2711 is made when the input voltage is symmetrical
to the supply voltages, this internal switching does not affect a large
variety of applications such as an inverting amplifier or non-inverting
amplifier with a gain larger than 2.5 (5V operation), where the common
mode voltage does not make excursions above this switching point.
The user should however, be aware that this switching does take
place if the operational amplifier is connected as a unity gain buffer
and should make provision in his design to allow for input offset voltage
variations.
3. The input bias and offset currents are essentially input protection
diode reverse bias leakage currents, and are typically less than 1pA
at room temperature. This low input bias current assures that the
analog signal from the source will not be distorted by input bias
currents. Normally, this extremely high input impedance of greater
than 1012Ω would not be a problem as the source impedance would
limit the node impedance. However, for applications where source
impedance is very high, it may be necessary to limit noise and hum
pickup through proper shielding.
4. The output stage consists of class AB complementary output drivers,
capable of driving a low resistance load. The output voltage swing is
limited by the drain to source on-resistance of the output transistors
as determined by the bias circuitry, and the value of the load resistor.
When connected in the voltage follower configuration, the oscillation
resistant feature, combined with the rail to rail input and output feature,
makes an effective analog signal buffer for medium to high source
impedance sensors, transducers, and other circuit networks.
5. The ALD2711A/ALD2711B/ALD2711 operational amplifier has been
designed to provide full static discharge protection. Internally, the
design has been carefully implemented to minimize latch up. However,
care must be exercised when handling the device to avoid strong
static fields that may degrade a diode junction, causing increased
input leakage currents. In using the operational amplifier, the user is
advised to power up the circuit before, or simultaneously with, any
input voltages applied and to limit input voltages to not exceed 0.3V
of the power supply voltage levels.
6. The ALD2711A/ALD2711B/ALD2711, with its micropower operation,
offers numerous benefits in reduced power supply requirements, less
noise coupling and current spikes, less thermally induced drift, better
overall reliability due to lower self heating, and lower input bias current.
It requires practically no warm up time as the chip junction heats up
to only 0.2°C above ambient temperature under most operating
conditions.
SUPPLY CURRENT (µA)
SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
500
300
400
0
200
0±1±2±3±4±5±6
T
A = -55°C
+25°C
+70°C
+125°C
INPUTS GROUNDED
OUTPUT UNLOADED
-25°C
INPUT BIAS CURRENT AS A FUNCTION
OF AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C)
100
10
1.0
0.01
0.1
INPUT BIAS CURRENT (pA)
100-25 0 75 1255025-50
1000
V
S
= ±2.5V
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 5 of 9
INPUT OFFSET VOLTAGE AS A FUNCTION
OF COMMON MODE INPUT VOLTAGE
COMMON MODE INPUT VOLTAGE (V)
-2 -1 0 +1 +3+2
15
10
5
-5
-10
0
-15
INPUT OFFSET VOLTAGE (mV)
V
S
= ±2.5V
T
A
= 25°C
LARGE - SIGNAL TRANSIENT
RESPONSE
2V/div
500mV/div 5µs/div
V
S
= ±1.0V
T
A
= 25°C
R
L
= 100KΩ
C
L
= 50pF
LARGE - SIGNAL TRANSIENT
RESPONSE
5V/div
2V/div 5µs/div
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL = 50pF
INPUT OFFSET VOLTAGE AS A FUNCTION
OF AMBIENT TEMPERATURE
REPRESENTATIVE UNITS
AMBIENT TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
-50 -25 0 +25 +50 +75 +100 +125
+4
+5
+3
+1
+2
0
-2
-1
-4
-3
-5
V
S
= ±2.5V
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF FREQUENCY
FREQUENCY (Hz)
1 10 100 1K 10K 1M 10M100K
120
100
80
60
40
20
0
-20
OPEN LOOP VOLTAGE
GAIN (dB)
90
0
45
180
135
PHASE SHIFT IN DEGREES
V
S
= ±2.5V
T
A
= 25°C
SMALL - SIGNAL TRANSIENT
RESPONSE
100mV/div
20mV/div 2µs/div
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL = 50pF
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF SUPPLY VOLTAGE AND TEMPERATURE
SUPPLY VOLTAGE (V)
1000
100
10
1
OPEN LOOP VOLTAGE
GAIN (V/mV)
0 ±2 ±4 ±6 ±8
-55°C ≤ T
A
≤ +125°C
R
L
= 100KΩ
OUTPUT VOLTAGE SWING AS A FUNCTION
OF SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
0±1±2±3±4±7±6±5
±6
±5
±4
±3
±2
±1
OUTPUT VOLTAGE SWING (V)
-55°C ≤ T
A
≤ +125°C
R
L
= 100KΩ
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 6 of 9
TYPICAL APPLICATIONS
PHOTO DETECTOR CURRENT TO
VOLTAGE CONVERTER
LOW VOLTAGE INSTRUMENTATION AMPLIFIER
WIEN BRIDGE OSCILLATOR (RAIL-TO-RAIL)
SINE WAVE GENERATOR
RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER RAIL-TO-RAIL WAVEFORM
0V
+5V
OUTPUT
0V
+5V
INPUT
V- = - 2.5V
10M
10M
10M
10M
10M
10M
R
IN
= 10MΩ Accuracy limited by resistor tolerances and input offset voltage
V+ = +2.5V
-
+
0.1µF
0.1µF
V
OUT
V- ≤ V
IN
≤ V+
V- ≤ V
OUT
≤ V+
V
1
V
4
V
3
V
2
V
OUT
= V
1
+ V
2
- V
3
- V
4
1/2 ALD2711
HIGH INPUT IMPEDANCE RAIL-TO-RAIL PRECISION
DC SUMMING AMPLIFIER
RAIL-TO-RAIL WINDOW COMPARATOR
10K
10K
10K
+2.5V
-2.5V
.01µF
C = .01µFR = 10K
-
+
1/2 ALD2711
f = 1 = 1.6KHZ
2πRC
~~
V
OUT
* See Rail-to-Rail Waveform
+5V
+
-
+
-
V
IN
100K
V
REF
(HIGH)
V
REF
(LOW)
3
2
5
6
8
4
1
7
1/4 74 C00
1/2 ALD2711
V
OUT
V
OUT (LOW)
FOR V
REF (LOW)
<
V
IN
< V
REF(HIGH)
100K
1/2 ALD2711
-
+
OUTPU
T
5V
0.1µF
* See Rail-to-Rail Waveform
0≤ VIN ≤ 5V
VIN
ZIN = 1013Ω
~
1/2 ALD2711
+
-+2.5V
-2.5V
RF = 5M
I
PHOTODIODE
VOUT = I X RF
RL = 100K
1/2 ALD2711
50K
100K
100K
f max = 20KHz
-40mV ≤ V
IN
≤ 40mV
-
+
0.1µF
0.1µF
V+
V-
0.1µF
0.1µF
V+
V-
-
+
100K
100K
-
500K
0.1µF
V+
V+ 1M
+
1M
V-
V- 0.1µF
V
OUT
1M
1/2 ALD2711
1/2 ALD2711
GAIN = 25 V- ≤ V
OUT
≤ V+ All resistors are 1%
V+ = +1.0V V- = -1.0V Short Circuit Input Current 1µA
1M
1/2 ALD2711
Performance waveforms.
Upper trace is the output of a
Wien Bridge Oscillator. Lower
trace is the output of Rail-to-Rail
voltage follower.
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 7 of 9
8 Pin Plastic SOIC Package
SOIC-8 PACKAGE DRAWING
Millimeters Inches
Min Max Min MaxDim
A
A1
b
C
D-8
E
e
H
L
S
1.75
0.25
0.45
0.25
5.00
4.05
6.30
0.937
8°
0.50
0.053
0.004
0.014
0.007
0.185
0.140
0.224
0.024
0°
0.010
0.069
0.010
0.018
0.010
0.196
0.160
0.248
0.037
8°
0.020
1.27 BSC 0.050 BSC
1.35
0.10
0.35
0.18
4.69
3.50
5.70
0.60
0°
0.25
ø
L
C
H
S (45°)
ø
e
A
A1
b
D
S (45°)
E
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 8 of 9
8 Pin Plastic DIP Package
PDIP-8 PACKAGE DRAWING
b
1
S
b
EE1
D
e
A2
A
1
A
L
c
e
1
ø
Millimeters Inches
Min Max Min MaxDim
A
A1
A2
b
b1
c
D-8
E
E1
e
e1
L
S-8
ø
3.81
0.38
1.27
0.89
0.38
0.20
9.40
5.59
7.62
2.29
7.37
2.79
1.02
0°
5.08
1.27
2.03
1.65
0.51
0.30
11.68
7.11
8.26
2.79
7.87
3.81
2.03
15°
0.105
0.015
0.050
0.035
0.015
0.008
0.370
0.220
0.300
0.090
0.290
0.110
0.040
0°
0.200
0.050
0.080
0.065
0.020
0.012
0.460
0.280
0.325
0.110
0.310
0.150
0.080
15°
ALD2711A/ALD2711B/ALD2711 Advanced Linear Devices 9 of 9
8 Pin CERDIP Package
CERDIP-8 PACKAGE DRAWING
A
A1
b
b1
C
D-8
E
E1
e
e1
L
L1
L2
S
Ø
3.55
1.27
0.97
0.36
0.20
--
5.59
7.73
3.81
3.18
0.38
--
0°
5.08
2.16
1.65
0.58
0.38
10.29
7.87
8.26
5.08
--
1.78
2.49
15°
Millimeters Inches
Min Max Min MaxDim
0.140
0.050
0.038
0.014
0.008
--
0.220
0.290
0.150
0.125
0.015
--
0°
0.200
0.085
0.065
0.023
0.015
0.405
0.310
0.325
0.200
--
0.070
0.098
15°
2.54 BSC
7.62 BSC
0.100 BSC
0.300 BSC
EE
1
C
e
1
ø
s
b
L
D
b
1
e
A
L
2
A
1
L
1
