ALD ALD2711_11

ADVANCED
LINEAR
DEVICES, INC.
ALD2711A/ALD2711B
ALD2711
DUAL MICROPOWER PRECISION RAIL-TO-RAIL CMOS OPERATIONAL AMPLIFIER
GENERAL DESCRIPTION
FEATURES
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.
• 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
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
LD2711A/ALD2711B/ALD2711 a versatile, micropower operational
amplifier.
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
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.
PIN CONFIGURATION
ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS))
0°C to +70°C
Operating Temperature Range
0°C to +70°C
-55°C to 125°C
8-Pin
Small Outline
Package (SOIC)
8-Pin
Plastic Dip
Package
8-Pin
CERDIP
Package
ALD2711ASAL
ALD2711BSAL
ALD2711SAL
ALD2711APAL
ALD2711BPAL
ALD2711PAL
ALD2711ADA
ALD2711BDA
ALD2711DA
OUT A
1
8
V+
-IN A
2
7
OUT B
+IN A
3
6
-IN B
V-
4
5
+IN B
TOP VIEW
SAL, PAL, DA PACKAGES
* Contact factory for leaded (non-RoHS) or high temperature versions.
Rev 2.1 ©2011 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286
www.aldinc.com
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V+
Differential input voltage range
Power dissipation
Operating temperature range SAL, PAL packages
DA package
Storage temperature range
Lead temperature, 10 seconds
CAUTION: ESD Sensitive Device. Use static control procedures in ESD controlled environment.
10.6V
-0.3V to V+ +0.3V
600 mW
0°C to +70°C
-55°C to +125°C
-65°C to +150°C
+260°C
OPERATING ELECTRICAL CHARACTERISTICS
TA = 25°C VS = ±2.5V unless otherwise specified
Min
2711A
Typ
Supply
Voltage
VS
V+
Input Offset
Voltage
VOS
0.25
0.65
1.0
0.5
1.0
1.5
0.8
Input Offset
Current
IOS
0.01
10
280
0.01
10
280
Input Bias
Current
IB
0.01
10
280
0.01
10
280
Input Voltage
Range
VIR
Input
Resistance
RIN
Input Offset
Voltage Drift
TCVOS
Power Supply
Rejection Ratio
PSRR
63
63
90
90
63
63
90
90
60
60
Common Mode
Rejection Ratio
CMRR
63
63
90
90
63
63
90
90
Large Signal
Voltage Gain
AV
15
100
300
15
100
300
-0.3
-2.8
Min
±5.0
10.0
±1.0
2.0
5.3
2.8
VO low
VO high
VO low
VO high
4.99
2.40
-0.3
-2.8
5.3
2.8
Max
Unit
Test Conditions
±5.0
10.0
V
V
Dual Supply
Single Supply
1.5
2.0
mV
mV
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
0.01
10
280
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
0.01
10
280
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
5.3
2.8
V
V
V+ = +5V
VS = ±2.5V
±1.0
2.0
-0.3
-2.8
1013
1013
1013
5
5
7
10
Output
Voltage
Range
±5.0
10.0
Min
2711
Typ
Symbol
±1.0
2.0
Max
2711B
Typ Max
Parameter
10
0.001
4.999
-2.48
2.48
0.01
-2.40
Ω
µV/°C
RS ≤ 100KΩ
90
90
dB
dB
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
60
60
90
90
dB
dB
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
10
100
300
V/mV
V/mV
V/mV
RL = 100KΩ
RL ≥ 1MΩ
RL = 100KΩ
0°C ≤ TA ≤ +70°C
V
V
V
V
RL = 1MΩ V+= +5V
0°C ≤ TA ≤ +70°C
RL = 100KΩ
0°C ≤ TA ≤ +70°C
7
0.001 0.01
4.99 4.999
-2.48 -2.40
2.40 2.48
0.001 0.01
4.99 4.999
-2.48 -2.40
2.40 2.48
Output Short
Circuit Current
ISC
Supply
Current
IS
200
450
200
450
200
450
µA
Power
Dissipation
PD
1.0
0.25
2.25
0.6
1.0
0.25
2.25
0.6
1.0
0.25
2.25
0.6
mW
ALD2711A/ALD2711B
ALD2711
1
1
1
Advanced Linear Devices
mA
VIN = 0V
No Load
VS = ±2.5V Both
VS = ±1.0V amplifiers
2 of 9
OPERATING ELECTRICAL CHARACTERISTICS (cont'd)
TA = 25°C VS = ±2.5V unless otherwise specified
Min
2711A
Typ
Min
Max
Min
2711
Typ
Symbol
Input
Capacitance
CIN
1
1
1
Bandwidth
BW
700
700
700
KHz
Slew Rate
SR
0.7
0.7
0.7
V/µs
AV = +1
RL = 100KΩ
Rise time
tr
0.2
0.2
0.2
µs
RL = 100KΩ
20
20
20
%
RL = 100KΩ
CL = 50pF
Overshoot
Factor
Max
2711B
Typ
Parameter
Max
Unit
Test Conditions
pF
Settling
Time
ts
10.0
10.0
10.0
µs
0.1% AV = 100
RL = 100KΩ
CL = 50pF
Channel
Separation
CS
140
140
140
dB
AV = 100
Unit
Test Conditions
TA = 25°C VS = ±5.0V unless otherwise specified
Min
2711A
Typ
Power Supply
Rejection Ratio
PSRR
100
100
100
dB
RS ≤ 100KΩ
Common Mode
Rejection Ratio
CMRR
100
100
100
dB
RS ≤ 100KΩ
Large Signal
Voltage Gain
AV
300
300
300
V/mV
RL = 100KΩ
Output Voltage
Range
VO low
VO high
V
V
RL = 100KΩ
Bandwidth
BW
1.0
1.0
1.0
MHz
Slew Rate
SR
1.0
1.0
1.0
V/µs
AV = +1
CL = 50pF
Max
Unit
Test Conditions
RS ≤ 100KΩ
-4.98
4.98
Min
-4.90
4.90
-4.98
4.98
Max
-4.90
Min
2711
Typ
Symbol
4.90
Max
2711B
Typ
Parameter
-4.98
4.90 4.98
Max
-4.90
VS = ±2.5V -55°C ≤ TA ≤ +125°C unless otherwise specified
2711ADA
Parameter
Symbol
Input Offset
Voltage
VOS
Input Offset
Current
Min
Typ
2711BDA
Max
Min
Typ
2711DA
Max
Min
Typ
1.8
2.3
2.8
mV
IOS
4
4
4
nA
Input Bias
Current
IB
4
4
4
nA
Power Supply
Rejection Ratio
PSRR
60
85
60
85
60
85
dB
RS ≤ 100KΩ
Common Mode
Rejection Ratio
CMRR
60
83
60
83
60
83
dB
RS ≤ 100KΩ
Large Signal
Voltage Gain
AV
10
50
10
50
10
50
V/mV
RL ≤ 100KΩ
Output Voltage
Range
VO low
VO high
2.35
-2.47
2.45
2.35
-2.47
2.45
2.35
-2.47
2.45
V
V
RL ≤ 100KΩ
ALD2711A/ALD2711B
ALD2711
-2.40
-2.40
Advanced Linear Devices
-2.40
3 of 9
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.
TYPICAL PERFORMANCE CHARACTERISTICS
±7
INPUTS GROUNDED
OUTPUT UNLOADED
500
COMMON MODE INPUT VOLTAGE RANGE
AS A FUNCTION OF SUPPLY VOLTAGE
+25°C
COMMON MODE INPUT
VOLTAGE RANGE (V)
SUPPLY CURRENT (µA)
SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
-25°C
400
TA = -55°C
300
+125°C
200
+70°C
TA = 25°C
±5
±4
±3
±2
±1
0
0
0
±1
±2
±3
±4
±5
0
±6
±1
±2
±3
±4
±5
±6
±7
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
OPEN LOOP VOLTAGE GAIN AS A
FUNCTION OF LOAD RESISTANCE
INPUT BIAS CURRENT AS A FUNCTION
OF AMBIENT TEMPERATURE
1000
100
10
VS = ±2.5V
TA = 25°C
1
10K
INPUT BIAS CURRENT (pA)
1000
OPEN LOOP VOLTAGE
GAIN (V/mV)
±6
10
1.0
0.1
0.01
100K
1M
10M
LOAD RESISTANCE (Ω)
ALD2711A/ALD2711B
ALD2711
VS = ±2.5V
100
-50
-25
0
25
50
75
100
125
AMBIENT TEMPERATURE (°C)
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4 of 9
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF SUPPLY VOLTAGE AND TEMPERATURE
±6
OUTPUT VOLTAGE SWING (V)
OPEN LOOP VOLTAGE
GAIN (V/mV)
1000
OUTPUT VOLTAGE SWING AS A FUNCTION
OF SUPPLY VOLTAGE
100
10
-55°C ≤ TA ≤ +125°C
RL = 100KΩ
-55°C ≤ TA ≤ +125°C
RL = 100KΩ
±5
±4
±3
±2
±1
1
0
±2
±4
±6
0
±8
±1
±2
±4
±5
±6
±7
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF FREQUENCY
OPEN LOOP VOLTAGE
GAIN (dB)
120
VS = ±2.5V
+3
+2
+1
0
-1
-2
VS = ±2.5V
TA = 25°C
100
-3
-4
80
60
0
40
45
20
90
0
135
180
-20
1
-5
-50
-25
0
+25
+50
+75
10
+100 +125
100
1K
10K 100K
FREQUENCY (Hz)
1M
PHASE SHIFT IN DEGREES
INPUT OFFSET VOLTAGE (mV)
INPUT OFFSET VOLTAGE AS A FUNCTION
OF AMBIENT TEMPERATURE
REPRESENTATIVE UNITS
+5
+4
±3
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
10M
AMBIENT TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
INPUT OFFSET VOLTAGE AS A FUNCTION
OF COMMON MODE INPUT VOLTAGE
LARGE - SIGNAL TRANSIENT
RESPONSE
15
VS = ±2.5V
TA = 25°C
10
2V/div
VS = ±1.0V
TA = 25°C
RL = 100KΩ
CL = 50pF
500mV/div
5µs/div
5
0
-5
-10
-15
-2
-1
0
+1
+2
+3
COMMON MODE INPUT VOLTAGE (V)
LARGE - SIGNAL TRANSIENT
RESPONSE
SMALL - SIGNAL TRANSIENT
RESPONSE
5V/div
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL = 50pF
100mV/div
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL = 50pF
2V/div
5µs/div
20mV/div
2µs/div
ALD2711A/ALD2711B
ALD2711
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5 of 9
TYPICAL APPLICATIONS
RAIL-TO-RAIL WAVEFORM
RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER
INPUT
5V
~ 1013Ω
ZIN =
+5V
0V
0.1µF
+5V
OUTPUT
0V
OUTPUT
+
VIN
0≤ VIN ≤ 5V
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.
* See Rail-to-Rail Waveform
RAIL-TO-RAIL WINDOW COMPARATOR
HIGH INPUT IMPEDANCE RAIL-TO-RAIL PRECISION
DC SUMMING AMPLIFIER
+5V
8
V+ = +2.5V
V1
V2
VREF (HIGH) 3
100K
10M
+
10M
0.1µF
-
10M
V3
V- ≤ VIN ≤ V+
V- ≤ VOUT ≤ V+
V- = - 2.5V
VOUT = V1 + V2 - V3 - V4
1/2 ALD2711
1
1/4 74 C00
VOUT
VIN
0.1µF
V4
10M
2
1/2 ALD2711
VOUT
10M
+
5
+
7
VREF (LOW) 6
-
100K
10M
4 1/2 ALD2711
RIN = 10MΩ Accuracy limited by resistor tolerances and input offset voltage
VOUT (LOW) FOR VREF (LOW) < VIN < VREF(HIGH)
WIEN BRIDGE OSCILLATOR (RAIL-TO-RAIL)
SINE WAVE GENERATOR
-
PHOTO DETECTOR CURRENT TO
VOLTAGE CONVERTER
RF = 5M
+2.5V
VOUT
1/2 ALD2711
+
I
10K
-2.5V
-
PHOTODIODE
C = .01µF
.01µF
R = 10K
~
f=
1
10K
+
10K
~ 1.6KHZ
=
+2.5V
VOUT = I X RF
RL = 100K
-2.5V
1/2 ALD2711
2πRC
* See Rail-to-Rail Waveform
LOW VOLTAGE INSTRUMENTATION AMPLIFIER
V+
0.1µF
1M
+
100K
500K
1/2 ALD2711
-
100K
V-
0.1µF
f max = 20KHz
-40mV ≤ VIN ≤ 40mV
V+
V+
0.1µF
+
50K
VOUT
V+ 1M
-
0.1µF
-
1/2 ALD2711
V-
100K
1/2 ALD2711
0.1µF
V-
100K
1M
+
1M
ALD2711A/ALD2711B
ALD2711
V-
0.1µF
GAIN = 25 V- ≤ VOUT ≤ V+ All resistors are 1%
V+ = +1.0V V- = -1.0V Short Circuit Input Current 1µA
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6 of 9
SOIC-8 PACKAGE DRAWING
8 Pin Plastic SOIC Package
E
Millimeters
Dim
S (45°)
D
A
Min
1.35
Max
1.75
Min
0.053
Max
0.069
A1
0.10
0.25
0.004
0.010
b
0.35
0.45
0.014
0.018
C
0.18
0.25
0.007
0.010
D-8
4.69
5.00
0.185
0.196
E
3.50
4.05
0.140
0.160
1.27 BSC
e
A
A1
e
Inches
0.050 BSC
H
5.70
6.30
0.224
0.248
L
0.60
0.937
0.024
0.037
ø
0°
8°
0°
8°
S
0.25
0.50
0.010
0.020
b
S (45°)
H
L
ALD2711A/ALD2711B
ALD2711
C
ø
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7 of 9
PDIP-8 PACKAGE DRAWING
8 Pin Plastic DIP Package
Millimeters
E
E1
D
S
A2
A1
e
b
A
L
Dim
Min
Max
Min
Max
A
3.81
5.08
0.105
0.200
A1
0.38
1.27
0.015
0.050
A2
1.27
2.03
0.050
0.080
b
0.89
1.65
0.035
0.065
b1
0.38
0.51
0.015
0.020
c
0.20
0.30
0.008
0.012
D-8
9.40
11.68
0.370
0.460
E
5.59
7.11
0.220
0.280
E1
7.62
8.26
0.300
0.325
e
2.29
2.79
0.090
0.110
e1
7.37
7.87
0.290
0.310
L
2.79
3.81
0.110
0.150
S-8
1.02
2.03
0.040
0.080
0°
15°
0°
15°
ø
b1
Inches
c
e1
ALD2711A/ALD2711B
ALD2711
ø
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8 of 9
CERDIP-8 PACKAGE DRAWING
8 Pin CERDIP Package
E E1
Millimeters
D
A1
s
A
L
L2
b
b1
e
L1
Inches
Dim
A
Min
Max
3.55
5.08
Min
0.140
Max
0.200
A1
1.27
2.16
0.050
0.085
b
0.97
1.65
0.038
0.065
b1
0.36
0.58
0.014
0.023
C
0.20
0.38
0.008
0.015
D-8
--
10.29
--
0.405
E
5.59
7.87
0.220
0.310
E1
7.73
8.26
0.290
0.325
e
2.54 BSC
0.100 BSC
e1
7.62 BSC
0.300 BSC
L
3.81
5.08
0.150
0.200
L1
3.18
--
0.125
--
L2
0.38
1.78
0.015
0.070
S
--
2.49
--
0.098
Ø
0°
15°
0°
15°
C
e1
ALD2711A/ALD2711B
ALD2711
ø
Advanced Linear Devices
9 of 9