ALD ALD2736SAL Precision dual ultra micropower cmos operational amplifier Datasheet

e
ADVANCED
LINEAR
DEVICES, INC.
TM
EPAD
EN
®
AB
LE
D
ALD2736A/ALD2736
PRECISION DUAL ULTRA MICROPOWER CMOS OPERATIONAL AMPLIFIER
GENERAL DESCRIPTION
FEATURES & BENEFITS
The ALD2736A/ALD2736 is a precision dual low-cost high-slew-rate
high-performance ultra micropower monolithic CMOS 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
25µA per op amp at 5V supply voltage. It is manufactured with
Advanced Linear Devices' enhanced EPAD® silicon gate CMOS process.
• Typical 25µA supply current per amplifier
• All parameters specified for +5V single supply
or ± 2.5V dual supply systems
• Rail to rail input and output voltage ranges
• No frequency compensation required -- unity
gain stable
• Extremely low input bias currents -- 0.01pA
typical
• Ideal for high source impedance applications
• Dual power supplies ±1.0V to ±5.0V
• Single power supply +2.0V to +10.0V
• High voltage gain -- typically 100V/mV @
±2.5V (100dB)
• Drive as low as a 20KΩ load
• Output short circuit protected
• Unity gain bandwidth of 0.4MHz
• Slew rate of 0.17V/µs
• Ultra Micropower symmetrical
complementary output drive
• Suitable for rugged, temperature-extreme
environments
The ALD2736A/ALD2736 is designed to offer high performance for a
wide range of applications requiring very low power dissipation. It has
been developed specifically for the +5V single battery or ±1V to ±5V dual
battery user and offers the popular industry standard single operational
amplifier pin configuration.
Several important characteristics of the device make application easier
to implement at those voltages. First, the operational amplifier can
operate with rail to rail input and output voltages. This means the signal
input voltage and output voltage can be close to or equal to the positive
and negative supply voltages. This feature allows numerous analog
serial stages and flexibility in input signal bias levels. Second, the
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 25pF capacitive and
20KΩ resistive loads.
These features, combined with extremely low input currents, high open
loop voltage gain of 100V/mV, useful bandwidth of 400KHz, a slew rate
of 0.17V/µs, low offset voltage and temperature drift, make the
ALD2736A/ALD2736 a versatile, micropower operational amplifier.
The ALD2736A/ALD2736, designed and fabricated with silicon gate
CMOS technology, offers on-chip offset voltage trimming, allowing the
device to be used without nulling in most applications. It is also
designed to offer tolerance to over-voltage input spikes of 300mV
beyond supply rails, high open loop voltage gain, and robust operation
at temperature extremes. Additionally, robust design and rigorous
screening make this device especially suitable for operation in temperature-extreme environments and rugged conditions.
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Voltage amplifier
Voltage follower/buffer
Charge integrator
Photodiode amplifier
Data acquisition systems
High performance portable instruments
Biochemical probe interface
Signal conditioning circuits
Sensor and transducer amplifiers
Low leakage amplifiers
Precision Sample and Hold amplifiers
Active filters
Picoammeter
Current to voltage converter
PIN CONFIGURATION
ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS))
Operating Temperature Range
0°C to +70°C
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
ALD2736ASAL
ALD2736SAL
ALD2736APAL
ALD2736PAL
ALD2736ADA
ALD2736DA
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.
©2014 Advanced Linear Devices, Inc., Vers. 2.0
OUT A
www.aldinc.com
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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
600mW
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
Parameter
Symbol
Min
ALD2736A
Typ
Max
Supply Voltage
VS
V+
Input Offset Voltage
VOS
Input Offset Current
IOS
0.01
10
240
Input Bias Current
IB
0.01
10
300
Input Voltage Range
VIR
Input Resistance
RIN
Input Offset Voltage Drift
TCVOS
Power Supply
Rejection Ratio
±1.0
2.0
±5.0
10.0
Min
ALD2736
Typ
+5.3
+2.8
Unit
Dual Supply
Single Supply
2.0
2.5
mV
mV
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
0.01
10
240
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
0.01
10
300
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
+5.3
+2.8
V
V
V+ = +5V
VS = ±2.5V
±5.0
10.0
-0.3
-2.8
1014
1014
5
5
PSRR
82
82
Common Mode
Rejection Ratio
CMRR
Large Signal Voltage Gain
AV
Output Voltage Range
VO low
VO high
4.99
VO low
VO high
2.40
Ω
µV/°C
RS ≤ 100KΩ
82
82
dB
dB
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
83
83
83
83
dB
dB
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
100
100
V/mV
RL = 1MΩ
V
V
RL = 1MΩ
0°C ≤ TA ≤ +70°C
V
RL =100KΩ
0°C ≤ TA ≤ +70°C
0.001
4.999
0.01
-2.48
-2.40
4.99
2.48
2.40
0.001
4.999
0.01
-2.48
-2.40
2.40
V
200
µA
Output Short
Circuit Current
ISC
Supply Current
IS
Power Dissipation
PD
Input Capacitance
CIN
1
1
Bandwidth
BW
400
400
KHz
Slew Rate
SR
.17
.17
V/µs
ALD2736A/ALD2736
Test
Conditions
V
V
±1.0
2.0
1.0
1.5
-0.3
-2.8
Max
200
50
85
50
425
Advanced Linear Devices
100
µA
VIN = 0V, No Load
500
µW
VS = ±2.5V
pF
AV = +1, RL = 1MΩ
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OPERATING ELECTRICAL CHARACTERISTICS (cont'd)
TA = 25°C VS = ±2.5V unless otherwise specified (cont'd)
ALD2736A
Parameter
Symbol
Rise time
tr
Min
Overshoot Factor
Typ
ALD2736
Max
Min
Typ
Max
Unit
Test Conditions
1.0
1.0
µs
RL = 1MΩ
20
20
%
RL = 1MΩ,
CL = 25pF
Settling Time
ts
10.0
10.0
µs
0.1%, AV = -1,
RL= 1MΩ,
CL = 25pF
TA = 25°C VS = ±1.0V unless otherwise specified
ALD2736A
Parameter
Symbol
Min
Power Supply Rejection Ratio
PSRR
70
Common Mode Rejection Ratio
CMRR
Large Signal Voltage Gain
AV
Output Voltage Range
VO low
VO high
0.9
Typ
ALD2736
Max
Unit
Test Conditions
70
dB
RS ≤ 1MΩ
70
70
dB
RS ≤ 1MΩ
50
50
V/mV
RL = 1MΩ
V
RL = 1MΩ
-0.95
0.95
Min
-0.9
0.9
Typ
-0.95
0.95
Max
-0.9
Bandwidth
BW
0.3
0.3
MHz
Slew Rate
SR
0.17
0.17
V/µs
AV = +1, CL = 50pF
Max
Unit
Test Conditions
RS ≤ 100KΩ
VS = ±2.5V -55°C ≤ TA ≤ +125°C unless otherwise specified
ALD2736A
Symbol
Input Offset Voltage
VOS
2.0
3.0
mV
Input Offset Current
IOS
2.0
2.0
nA
Input Bias Current
IB
2.0
2.0
nA
Power Supply Rejection Ratio
PSRR
75
75
dB
RS ≤ 1MΩ
Common Mode Rejection Ratio
CMRR
83
83
dB
RS ≤ 1MΩ
Large Signal Voltage Gain
AV
50
50
V/mV
RL = 1MΩ
Output Voltage Range
VO low
VO high
V
V
RL = 1MΩ
ALD2736A/ALD2736
Min
2.30
Typ
ALD2736
Parameter
-2.40
2.40
Max
Min
-2.30
2.30
Advanced Linear Devices
Typ
-2.40
2.40
-2.30
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Design & Operating Notes:
1. The ALD2736A/ALD2736 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 ALD2736A/ALD2736 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 ALD2736A/ALD2736 has complementary p-channel and nchannel input differential stages connected in parallel to accomplish
rail to rail common mode input voltage ranges. 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 ALD2736A/
ALD2736 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 below 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 provisions in the 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 0.01pA 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 10 14Ω
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 ALD2736A/ALD2736 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 ALD2736A/ALD2736, 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 0.1°C above ambient temperature under
most operating conditions.
7. The ALD2736A/ALD2736 has an internal design architecture that
provides robust high temperature operation. Contact factory for
custom screening versions.
TYPICAL PERFORMANCE CHARACTERISTICS
SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
±6
INPUTS GROUNDED
OUTPUT UNLOADED
COMMON MODE INPUT
VOLTAGE RANGE (V)
SUPPLY CURRENT (µA)
100
COMMON MODE INPUT VOLTAGE RANGE
AS A FUNCTION OF SUPPLY VOLTAGE
+25°C
80
-25°C
TA = -55°C
60
40
20
+70°C
TA = 25°C
±4
±3
±2
±1
+125°C
0
0
0
±1
±2
±3
±4
±5
0
±6
±1
±2
±3
±4
±5
±6
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
INPUT BIAS CURRENT (pA)
1000
OPEN LOOP VOLTAGE
GAIN (V/mV)
±5
100
10
VS = ±2.5V
TA = 25°C
100
VS = ±2.5V
10
1.0
0.1
0.01
1
10K
100K
1M
10M
ALD2736A/ALD2736
-50
-25
0
+25
+50
+75
+100
+125
AMBIENT TEMPERATURE (°C)
LOAD RESISTANCE (Ω)
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TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF SUPPLY VOLTAGE AND TEMPERATURE
OUTPUT VOLTAGE SWING AS A
FUNCTION OF SUPPLY VOLTAGE
±6
OUTPUT VOLTAGE SWING (V)
OPEN LOOP VOLTAGE
GAIN (V/mV)
1000
100
10
-55°C ≤ TA ≤ +125°C
RL = 100KΩ
1
-55°C ≤ TA ≤ +125°C
RL = 100KΩ
±5
±4
±3
±2
±1
0
±1
±2
±3
±4
±5
±6
0
±1
±2
±3
±4
±5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
OPEN LOOP VOLTAGE GAIN AS A
FUNCTION OF FREQUENCY
LARGE-SIGNAL TRANSIENT
RESPONSE
±6
120
VS = ±2.5V
TA = 25°C
80
60
0
40
45
20
90
0
135
-20
180
1
10
100
1K
10K
100K
1M
PHASE SHIFT IN DEGREES
OPEN LOOP VOLTAGE
GAIN (dB)
5V/div
100
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL = 25pF
2V/div
10µs/div
10M
FREQUENCY (Hz)
LARGE-SIGNAL TRANSIENT
RESPONSE
2V/div
500mV/div
ALD2736A/ALD2736
SMALL-SIGNAL TRANSIENT
RESPONSE
VS = ±1.0V
TA = 25°C
RL = 100KΩ
CL = 25pF
100mV/div
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL = 25pF
10µs/div
50mV/div
10µs/div
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TYPICAL APPLICATIONS
RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER
PHOTO DETECTOR CURRENT TO
VOLTAGE CONVERTER
5V
~ 1012Ω
ZIN =
RF = 5M
0.1µF
I
OUTPUT
1/2 ALD2736
0≤ VIN ≤ 5V
1/2 ALD2736
RAIL-TO-RAIL WAVEFORM
V+ = +2.5V
V2
-2.5V
* See Rail to Rail Waveform
INPUT
10M
+
10M
10M
10M
0.1µF
1/2 ALD2736
0.1µF
V3
+5V
0V
+5V
OUTPUT
0V
VOUT
-
VOUT = 1 X RF
RL = 100K
+
HIGH INPUT IMPEDANCE RAIL-TO-RAIL
PRECISION DC SUMMING AMPLIFIER
V1
+2.5V
-
PHOTODIODE
+
VIN
V- ≤ VIN ≤ V+
V4
Performance waveforms.
Upper trace is the output of a
Wien Bridge Oscillator. Lower
trace is the output of Rail-to-rail
voltage follower.
V- ≤ VOUT ≤ V+
V- = - 2.5V
10M
10M
VOUT = V1 + V2 - V3 - V4
RIN = 10MΩ Accuracy limited by resistor tolerances and input offset voltage
WIEN BRIDGE OSCILLATOR (RAIL-TO-RAIL)
SINE WAVE GENERATOR
RAIL-TO-RAIL WINDOW COMPARATOR
+5V
-
8
+2.5V
100K
VREF (HIGH) 3
1
VOUT
1/2 ALD2736
+
2
10K
-2.5V
.01µF
5
10K
+
7
100K
~
f=
-
10K
R = 10K
1/4 74 C00
VOUT
VIN
C = .01µF
1/2 ALD2736
+
VREF (LOW)
6 -
4
~ 1.6KHZ
1
=
2πRC
1/2 ALD2736
VOUT (LOW) FOR VREF (LOW) < VIN < VREF(HIGH)
* See Rail to Rail Waveform
LOW VOLTAGE INSTRUMENTATION AMPLIFIER
V+
0.1µF
1M
+
100K
-
500K
100K
V-
1/2 ALD2736
f max = 20KHz
-40mV ≤ VIN ≤ 40mV
V+
V+
0.1µF
0.1µF
+
50K
V+ 1M
0.1µF
100K
1M
100K
VOUT
V-
0.1µF
ALD1736
V-
1M
+
V-
0.1µF
1/2 ALD2736
ALD2736A/ALD2736
GAIN = 25 V- ≤ VOUT ≤ V+ All resistors are 1%
V+ = +1.0V V- = -1.0V Short Circuit Input Current 1µA
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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
ALD2736A/ALD2736
C
ø
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PDIP-8 PACKAGE DRAWING
8 Pin Plastic DIP Package
E
E1
Millimeters
D
S
A2
A1
e
b
b1
A
L
Inches
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
L
7.37
7.87
0.290
0.310
2.79
3.81
0.110
0.150
S-8
1.02
2.03
0.040
0.080
0°
15°
0°
15°
ø
c
e1
ALD2736A/ALD2736
ø
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CERDIP-8 PACKAGE DRAWING
8 Pin CERDIP Package
E E1
Millimeters
D
A1
s
A
L
L2
b
b1
e
L1
Min
Inches
Dim
A
3.55
Max
5.08
0.140
Min
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
ALD2736A/ALD2736
ø
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