ADVANCED
LINEAR
DEVICES, INC.
ALD1702A/ALD1702B
ALD1702/ALD1703
5V RAIL-TO-RAIL PRECISION OPERATIONAL AMPLIFIER
GENERAL DESCRIPTION
FEATURES
The ALD1702A/ALD1702B/ALD1702/ALD1703 is a monolithic operational amplifier intended primarily for a wide range of analog applications
in +5V single power supply and ±5V dual power supply systems as well
as +4V to +10V battery operated systems. All device characteristics are
specified for +5V single supply or ±2.5V dual supply systems. It is
manufactured with Advanced Linear Devices' enhanced ACMOS silicon
gate CMOS process.
• Rail-to-rail input and output voltage ranges
• All parameters specified for +5V single
supply or ±2.5V dual supply systems.
• High load capacitance capability -4000pF typical
• No frequency compensation required -unity gain stable
• Extremely low input bias currents -1.0pA typical (30pA max.)
• Ideal for high source impedance applications
• Dual power supply ±2.5V to ±5.0V operation
• Single power supply +5V to +10V operation
• High voltage gain -- typically 85V/mV
@ ±2.5V and 250V/mV @ ±5.0V
• Drive as low as 2KΩ load with 5mA
drive current
• Output short circuit protected
• Unity gain bandwidth of 1.5MHz (1MHz min.)
• Slew rate of 2.1V/µs (1.4V/µs min.)
• Low power dissipation
• Suitable for rugged, temperature-extreme
environments
The ALD1702A/ALD1702B/ALD1702/ALD1703 is designed to offer a
balanced trade-off of performance parameters providing a wide range of
desired specifications. It has been developed specifically with the 5V
single supply or ±2.5 dual supply user in mind and offers the industry
pin configuration of µA741 and ICL7611 types.
Several important characteristics of the device make many applications
easy to implement for these supply voltages. First, the operational
amplifier can operate with rail to rail input and output voltages. This
feature allows numerous analog serial stages to be implemented without
losing operating voltage margin. Second, the device was designed to
accommodate mixed applications where digital and analog circuits may
work off the same 5V power supply. Third, the output stage can drive
up to 400pF capacitive and 5KΩ resistive loads in non-inverting unity
gain connection and double the capacitance in the inverting unity gain
mode.
These features, coupled with extremely low input currents, high voltage
gain, useful bandwidth of 1.5MHz, slew rate of 2.1V/µs, low power
dissipation, low offset voltage and temperature drift, make the ALD1702A/
ALD1702B/ALD1702/ALD1703 a truly versatile, user friendly, operational
amplifier.
The ALD1702A/ALD1702B/ALD1702/ALD1703 is designed and
fabricated with silicon gate CMOS technology, and offers 1pA typical
input bias current. On-chip offset voltage trimming allows the device to
be used without nulling in most applications. The device offers typical
offset drift of less than 7µV/°C which eliminates many trim or temperature
compensation circuits. For precision applications, it is designed to settle
to 0.01% in 8µs. 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
Signal conditioning circuits
Sensor and transducer amplifiers
Low leakage amplifiers
Active filters
Sample/Hold amplifier
Picoammeter
Current to voltage converter
Coaxial cable driver
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
ALD1702ASAL
ALD1702BSAL
ALD1702SAL
ALD1703SAL
ALD1702APAL
ALD1702BPAL
ALD1702PAL
ALD1703PAL
ALD1702ADA
ALD1702BDA
ALD1702DA
ALD1703DA
8
N/C
7
V+
3
6
OUT
4
5
N/C
N/C
1
-IN
2
+IN
V-
2
TOP VIEW
SAL, PAL, DA PACKAGES
* N/C pins are internally connected. Do not connect externally.
* Contact factory for leaded (non-RoHS) or high temperature versions.
Rev 2.1 ©2010 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
1702A
Typ
Max
Min
1702B
Typ
Max
Min
±5.0
10.0
±2.0
4.0
±5.0
10.0
±2.0
4.0
1702
Typ Max
Parameter
Symbol Min
Supply
Voltage
VS
V+
Input Offset
Voltage
VOS
Input Offset
Current
IOS
1.0
25
240
1.0
25
240
1.0
25
240
Input Bias
Current
IB
1.0
30
300
1.0
30
300
1.0
30
300
Input Voltage
Range
VIR
Input
Resistance
RIN
Input Offset
Voltage Drift
TCVOS
±2.0
4.0
0.9
1.7
-0.3
-2.8
5.3
2.8
±5.0
10.0
2.0
2.8
-0.3
-2.8
5.3
2.8
Min
1703
Typ
5.3
2.8
Unit
Test
Conditions
±5.0
10.0
V
Dual Supply
Single Supply
10.0
11.0
mV
mV
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
1.0
30
450
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
1.0
50
600
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
4.85
2.35
V
V
V+ = +5V
VS = ±2.5V
±2.0
4.0
4.5
5.3
-0.3
-2.8
Max
0.15
-2.35
1012
1012
1012
1012
7
7
7
10
µV/°C
RS ≤ 100KΩ
Ω
Power Supply PSRR
Rejection Ratio
70
70
80
80
65
65
80
80
65
65
80
80
60
60
80
80
dB
dB
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
Common Mode CMRR
Rejection Ratio
70
70
83
83
65
65
83
83
65
65
83
83
60
60
83
83
dB
dB
RS ≤100KΩ
0°C ≤ TA ≤ +70°C
Large Signal
Voltage Gain
50
85
400
50
85
400
50
85
400
32
85
300
V/mV
V/mV
V/mV
RL =10KΩ
RL ≥1MΩ
RL =10KΩ
0°C ≤ TA ≤ +70°C
V
V
V
RL =1MΩ V+ = 5V
0°C ≤ TA ≤ +70°C
RL =10KΩ
0°C ≤ TA ≤ +70°C
AV
20
Output
Voltage
Range
Output Short
Circuit Current
20
VO low
0.002
VO high 4.99 4.998
VO low
-2.44
VO high 2.35 2.44
ISC
0.01
4.99
-2.35
2.35
8
20
0.002 0.01
4.998
-2.44 -2.35
2.44
4.99
2.35
8
10
0.002 0.01
4.998
-2.44 -2.35
2.44
4.99
2.3
8
0.002
4.998
-2.4
2.4
0.01
-2.3
8
mA
Supply Current IS
1.1
2.0
1.1
2.0
1.1
2.0
1.1
2.5
mA
VIN = 0V
No Load
Power
Dissipation
PD
5.5
10.0
5.5
10.0
5.5
10.0
5.5
12.5
mW
VS = ±2.5V
Input
Capacitance
CIN
Bandwidth
BW
1.0
1.5
1.0
1.5
1.0
1.5
0.7
1.5
MHz
Slew Rate
SR
1.4
2.1
1.4
2.1
1.4
2.1
1.1
2.1
V/µs
AV = +1
RL = 10KΩ
Rise time
tr
0.2
µs
RL = 10KΩ
CL = 100pF
ALD1702A/ALD1702B
ALD1702/ALD1703
1
0.2
1
0.2
1
0.2
Advanced Linear Devices
1
pF
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OPERATING ELECTRICAL CHARACTERISTICS (cont'd)
TA = 25°C VS = ±2.5V unless otherwise specified
Parameter
Symbol Min
Overshoot
Factor
1702A
Typ
Max
1702B
Typ
Min
Max
Min
1702
Typ
Max
Min
1703
Typ
Max
Unit
Test
Conditions
10
10
10
10
%
RL =10KΩ
CL = 100pF
pF
pF
Gain = 1
Gain = 5
Maximum Load
Capacitance
CL
400
4000
400
4000
400
4000
400
4000
Input Noise
Voltage
en
26
26
26
26
nV/√Hz
f =1KHz
Input Current
Noise
in
0.6
0.6
0.6
0.6
fA/√Hz
f =10Hz
Settling Time
ts
8.0
3.0
8.0
3.0
8.0
3.0
8.0
3.0
µs
µs
0.01%
0.1% AV = -1
RL=5KΩ
CL=50pF
TA = 25°C VS = ±5.0V unless otherwise specified
Parameter
Power Supply
Symbol Min
1702A
Typ
Max
1702B
Typ
Min
Max
Min
1702
Typ
Max
Min
1703
Typ
Max
Unit
Test
Conditions
PSRR
83
83
83
83
dB
RS ≤ 100KΩ
Common Mode CMRR
83
83
83
83
dB
RS ≤ 100KΩ
250
250
250
250
V/mV
RL =10KΩ
V
RL =10KΩ
Rejection Ratio
Rejection Ratio
Large Signal
Voltage Gain
AV
Output Voltage VO low
Range
VO high
4.8
-4.9
4.93
-4.8
-4.9
4.93
4.8
-4.8
4.8
-4.9
4.93
-4.8
4.8
-4.9
4.93
-4.8
Bandwidth
BW
1.7
1.7
1.7
1.7
MHz
Slew Rate
SR
2.8
2.8
2.8
2.8
V/µs
AV = +1
CL = 50pF
VS = ±2.50V -55°C ≤ TA ≤ +125°C unless otherwise specified
Min
1702BDA
Typ
Max
1702DA
Typ
Max
Unit
Input Offset
Voltage
VOS
3.0
4.0
6.5
mV
Input Offset
Current
IOS
8.0
8.0
8.0
nA
Input Bias
Current
IB
10.0
10.0
10.0
nA
Power Supply
Rejection Ratio
PSRR
60
75
60
75
60
75
dB
RS ≤ 100KΩ
Common Mode
Rejection Ratio
CMRR
60
83
60
83
60
83
dB
RS ≤ 100KΩ
Large Signal
Voltage Gain
AV
10
25
10
25
7
25
V/ mV
RL = 10KΩ
Output Voltage
Range
VO low
VO high
0.1
4.9
4.8
0.1
4.9
RL = 10KΩ
4.8
0.1
4.9
V
4.8
0.2
Advanced Linear Devices
Min
Test
Conditions
Symbol
ALD1702A/ALD1702B
ALD1702/ALD1703
Min
1702ADA
Typ
Max
Parameter
0.2
0.2
RS ≤ 100KΩ
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Design & Operating Notes:
1. The ALD1702A/ALD1702B/ALD1702/ALD1703 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 ALD1702A/ALD1702B/ALD1702/ALD1703 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.
A unity gain buffer using the ALD1702A/ALD1702B/ALD1702/
ALD1703 will typically drive 400pF of external load capacitance
without stability problems. In the inverting unity gain configuration,
it can drive up to 800pF of load capacitance. Compared to other
CMOS operational amplifiers, the ALD1702A/ALD1702B/ALD1702/
ALD1703 has shown itself to be more resistant to parasitic
oscillations.
2. The ALD1702A/ALD1702B/ALD1702/ALD1703 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 above the
negative supply voltage. Since offset voltage trimming on the
ALD1702A/ALD1702B/ALD1702/ALD1703 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 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 ALD1702A/ALD1702B/ALD1702/ALD1703 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.
TYPICAL PERFORMANCE CHARACTERISTICS
COMMON MODE INPUT VOLTAGE RANGE
AS A FUNCTION OF SUPPLY VOLTAGE
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF SUPPLY VOLTAGE AND TEMPERATURE
1000
TA = 25°C
OPEN LOOP VOLTAGE
GAIN (V/mV)
COMMON MODE INPUT
VOLTAGE RANGE (V)
±7
±6
±5
±4
±3
±2
} +25°C
100
} +125°C
10
RL= 10KΩ
RL= 5KΩ
±1
0
1
0
±1
±2
±3
±4
±5
±6
±7
0
±2
±4
±6
±8
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
INPUT BIAS CURRENT AS A FUNCTION
OF AMBIENT TEMPERATURE
SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
±5
10000
1000
VS = ± 2.5V
SUPPLY CURRENT (mA)
INPUT BIAS CURRENT (pA)
} -55°C
100
10
1.0
INPUTS GROUNDED
OUTPUT UNLOADED
±4
±3
±2
TA = -55ºC
-25°C
±1
+25°C
+80°C
+125°C
0
0.1
-50
-25
0
25
50
75
100
125
ALD1702A/ALD1702B
ALD1702/ALD1703
0
±1
±2
±3
±4
±5
±6
SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
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TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
OPEN LOOP VOLTAGE GAIN AS
A FUNCTION OF FREQUENCY
OUTPUT VOLTAGE SWING AS A
FUNCTION OF SUPPLY VOLTAGE
120
OPEN LOOP VOLTAGE
GAIN (dB)
-55°C ≤ TA ≤ 125°C
±6
RL = 10KΩ
RL = 10KΩ
±5
±4
RL = 2KΩ
±3
±2
VS = ±2.5V
TA = 25°C
100
80
60
0
40
45
20
90
0
135
180
-20
0
±1
±2
±3
±4
±5
±6
±7
1
10
100
SUPPLY VOLTAGE (V)
100K
1M
10M
VS = ±2.5V
+3
+2
+1
0
-1
-2
-3
-4
INPUT OFFSET VOLTAGE AS A FUNCTION
OF COMMON MODE INPUT VOLTAGE
15
INPUT OFFSET VOLTAGE (mV)
INPUT OFFSET VOLTAGE (mV)
10K
FREQUENCY (Hz)
INPUT OFFSET VOLTAGE AS A FUNCTION
OF AMBIENT TEMPERATURE
REPRESENTATIVE UNITS
+5
+4
1K
PHASE SHIFT IN DEGREES
OUTPUT VOLTAGE SWING (V)
±7
VS = ±2.5V
TA = 25°C
10
5
0
-5
-10
-15
-5
-2
-50
-25
0
+25
+50
+75
+100 +125
-1
0
+1
+2
+3
COMMON MODE INPUT VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
VOLTAGE NOISE DENSITY AS A
FUNCTION OF FREQUENCY
OPEN LOOP VOLTAGE GAIN AS A
FUNCTION OF LOAD RESISTANCE
150
VOLTAGE NOISE DENSITY
(nV/ √ Hz)
OPEN LOOP VOLTAGE
GAIN (V/mV)
1000
100
10
VS = ±2.5V
TA = 25°C
125
VS = ±2.5V
TA = 25°C
100
75
50
25
0
1
1K
10K
100K
1000K
10
100
LARGE - SIGNAL TRANSIENT
RESPONSE
100mV/div
VS = ±2.5V
TA = 25°C
RL = 10KΩ
CL = 50pF
ALD1702A/ALD1702B
ALD1702/ALD1703
10K
100K
1000K
SMALL - SIGNAL TRANSIENT
RESPONSE
5V/div
1V/div
1K
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
20mV/div
2µs/div
Advanced Linear Devices
VS = ±2.5V
TA = 25°C
RL = 10KΩ
CL = 50pF
2µs/div
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TYPICAL APPLICATIONS
RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER
RAIL-TO-RAIL VOLTAGE COMPARATOR
+5V
5V
ZIN =~ 1012Ω
0.1µF
VIN
VIN
OUTPUT
CL
+
OUTPUT
+
50K
RL =10KΩ
400pF
0.1µF
-
+5V
0 ≤ VIN ≤ 5V
10M
* See rail to rail waveform
LOW OFFSET SUMMING AMPLIFIER
RAIL-TO-RAIL WAVEFORM
50K
+2.5V
10K
INPUT 1
INPUT 2
INPUT
.01µF
OUTPUT
GAIN = 5
.01µF
+
CL = 4000pF
* Circuit Drives Large Load
Capacitance ≤ 4000pF
0V
+5V
OUTPUT
0V
10K
+5V
Performance waveforms.
Upper trace is the output of a
Wien Bridge Oscillator. Lower
trace is the output of Rail-to-rail
voltage follower.
- 2.5V
PHOTO DETECTOR CURRENT TO
VOLTAGE CONVERTER
WIEN BRIDGE OSCILLATOR (RAIL-TO-RAIL)
SINE WAVE GENERATOR
+2.5V
-
RF = 5M
OUTPUT
I
+
10K
-2.5V
C = .01µF
f =~
+
10K
R = 10K
1
2πRC
VOUT = I x RF
PHOTODIODE
10K
.01µF
+2.5V
-2.5V
RL = 10K
~ 1.6KHz
* See Rail to Rail Waveform
ALD1702A/ALD1702B
ALD1702/ALD1703
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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
ALD1702A/ALD1702B
ALD1702/ALD1703
C
ø
Advanced Linear Devices
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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
ALD1702A/ALD1702B
ALD1702/ALD1703
ø
Advanced Linear Devices
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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
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
ALD1702A/ALD1702B
ALD1702/ALD1703
ø
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