ALD ALD4706 Dual ultra micropower rail-to-rail cmos operational amplifier Datasheet

ADVANCED
LINEAR
DEVICES, INC.
ALD4706A/ALD4706B
ALD4706
DUAL ULTRA MICROPOWER RAIL-TO-RAIL CMOS OPERATIONAL AMPLIFIER
GENERAL DESCRIPTION
FEATURES
The ALD4706A/ALD4706B/ALD4706 is a quad monolithic CMOS ultra
micropower 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. Total supply current for four operational amplifiers is 200µA
maximum at 5V supply voltage. It is manufactured with Advanced Linear
Devices' enhanced ACMOS silicon gate CMOS process.
• All parameters specified for + 5V single
supply or ± 2.5V dual supply systems
• Rail- to- rail input and output voltage ranges
• Unity gain stable
• Extremely low input bias currents -- 0.1pA
• High source impedance applications
• 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 0.2MHz
• Slew rate of 0.17V/µs
• Power dissipation of 20µA per op amp
• Symmetrical output drive
• Suitable for rugged, temperature-extreme
environments
The ALD4706A/ALD4706B/ALD4706 is designed to offer a trade-off of
performance parameters providing a wide range of desired specifications.
It has been developed specifically for the +5V single supply or ±1V to
±5V dual supply user and offers the popular industry standard pin
configuration of LM324 types and ICL7641 types.
Several important characteristics of the device make application easier
to implement at these 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 equal to or near to 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 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 200KHz, a slew rate of 0.17V/µs, low power dissipation of 0.5mW,
low offset voltage and temperature drift, make the ALD4706A/ALD4706B/
ALD4706 a versatile, ultra micropower quad operational amplifier.
The ALD4706A/ALD4706B/ALD4706, designed and fabricated with
silicon gate CMOS technology, offers 0.1pA typical input bias current.
Due to low voltage and low power operation, reliability and operating
characteristics, such as input bias currents and warm up time, are greatly
improved. Additionally, robust design and rigorous screening make this
device especially suitable for operation in temperature-extreme
environments and rugged conditions.
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
14-Pin
Small Outline
Package (SOIC)
14-Pin
Plastic Dip
Package
14-Pin
CERDIP
Package
ALD4706ASBL
ALD4706BSBL
ALD4706SBL
ALD4706APBL
ALD4706BPBL
ALD4706PBL
ALD4706ADB
ALD4706BDB
ALD4706DB
* Contact factory for leaded (non-RoHS) or high temperature versions.
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
OUT A
1
14
OUT D
-IN A
2
13
-IN D
+IN A 3
12
+IN D
V+
4
11
V-
+IN B 5
10
+IN C
-IN B
6
9
-IN C
OUT B
7
8
OUT C
TOP VIEW
SBL, PBL, DB PACKAGES
Rev 2.0 ©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 SBL, PBL packages
DB 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
4706B
Typ Max
Min
±5.0 ±1.0
10.0 2.0
±5.0
10.0
±1.0
2.0
Symbol
Supply
Voltage
VS
V+
Input Offset
Voltage
VOS
Input Offset
Current
IOS
0.1
20
200
0.1
20
200
Input Bias
Current
IB
0.1
20
200
0.1
20
200
Input Voltage
Range
VIR
Input
Resistance
RIN
Input Offset
Voltage Drift
TCVOS
Min
4706A
Typ
Parameter
±1.0
2.0
Max
2.0
2.8
-0.3
-2.8
5.3
2.8
4706
Typ
Max
Unit
Test
Conditions
±5.0
10.0
V
V
Dual Supply
Single Supply
10.0
11.0
mV
mV
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
0.1
20
200
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
0.1
20
200
pA
pA
TA = 25°C
0°C ≤ TA ≤ +70°C
5.3
2.8
V
V
V+ = +5
VS = ±2.5V
5.0
5.8
-0.3
-2.8
5.3
2.8
-0.3
-2.8
1013
1013
1013
7
7
10
µV/°C
RS ≤ 100KΩ
Ω
Power Supply
Rejection Ratio
PSRR
65
65
83
83
65
65
83
83
60
60
83
83
dB
dB
RS ≤ 100KΩ
0°C ≤ TA ≤ +70°C
Common Mode
Rejection Ratio
CMRR
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
AV
10
60
300
10
60
300
7
50
300
V/mV
V/mV
V/mV
RL = 100KΩ
RL ≥ 1MΩ
RL = 100KΩ
10
Output
Voltage
Range
10
VO low
VO high
0.001
4.999
0.01
4.99
VO low
VO high
-2.40
2.40
-2.25
2.25
Output Short
Circuit Current
ISC
200
Supply Current
IS
120
Power
Dissipation
PD
ALD4706A/ALD4706B
ALD4706
7
0.001
4.99 4.999
0.01
V
V
RL = 1MΩ V+ = +5V
0°C ≤ TA ≤ +70°C
-2.40 -2.25
-2.40
2.40
2.25 2.40
-2.25
V
V
RL = 100KΩ VS = ±2.5V
0°C ≤ TA ≤ +70°C
0.001
4.99 4.999
2.25
0.01
200
200
1.0
120
200
200
1.0
Advanced Linear Devices
120
µA
200
1.0
µA
µW
VIN=0V
No Load
All amplifiers
VS = ±2.5V
2 of 9
OPERATING ELECTRICAL CHARACTERISTICS (cont'd)
TA = 25°C VS = ±2.5V unless otherwise specified
Min
4706A
Typ
CIN
1
1
1
Bandwidth
BW
200
200
200
KHz
Slew Rate
SR
0.17
0.17
0.17
V/µs
RL = 100KΩ
AV = +1
Rise time
tr
1.0
1.0
1.0
µs
RL = 100KΩ
20
20
20
%
RL = 100KΩ
CL = 25pF
ts
10.0
10.0
10.0
µs
0.1% AV = 1
CL = 25pF RL = 100KΩ
CS
140
140
140
dB
AV = 100
Channel
Separation
Max
Min
Max
Unit
Test
Conditions
Input
Capacitance
Settling
Time
Min
4706
Typ
Symbol
Overshoot
Factor
Max
4706B
Typ
Parameter
pF
TA = 25°C VS = ±1.0V unless otherwise specified
Min
4706A
Typ
PSRR
80
80
80
dB
RS ≤ 1MΩ
Common Mode
Rejection Ratio
CMRR
80
80
80
dB
RS ≤ 1MΩ
Large Signal
Voltage Gain
AV
50
50
50
V/mV
RL = 1MΩ
Output Voltage
Range
VO low
VO high
V
V
RL = 1MΩ
Bandwidth
BW
200
200
200
KHz
Slew Rate
SR
0.1
0.1
0.1
V/µs
-.90
.90
-0.95
0.95
Max
Min
-.90
-0.95
.90 0.95
Max
-.90
Unit
Test
Conditions
Power Supply
Rejection Ratio
-0.95
0.95
Min
4706
Typ
Symbol
.90
Max
4706B
Typ
Parameter
AV =+1
CL = 25pF
VS = ±2.5V –55°C ≤ TA ≤ +125°C unless otherwise specified
4706ADB
Typ
Max
Min
Typ
4706DB
Input Offset
Voltage
VOS
Input Offset
Current
IOS
1
4
1
4
Input Bias
Current
IB
1
4
1
4
Power Supply
Rejection Ratio
PSRR
60
75
60
75
60
75
dB
RS ≤ 1MΩ
Common Mode
Rejection Ratio
CMRR
60
83
60
83
60
83
dB
RS ≤ 1MΩ
Large Signal
Voltage Gain
AV
10
50
10
50
7
50
V/mV
RL = 1MΩ
Output Voltage
Range
VO low
VO high
2.25
-2.40
2.40
2.25
-2.40
2.40
V
V
RL = 1MΩ
3.0
Max
Min
Typ
Test
Symbol
ALD4706A/ALD4706B
ALD4706
Min
4706BDB
Parameter
Max
Unit
15.0
mV
1
4
nA
1
4
nA
6.0
-2.25
2.25
-2.40 -2.25
2.40
Advanced Linear Devices
-2.25
Conditions
RS ≤ 1MΩ
3 of 9
Design & Operating Notes:
1. The ALD4706A/ALD4706B/ALD4706 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 ALD4706A/ALD4706B/
ALD4706 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 ALD4706A/ALD4706B/ALD4706 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 ALD4706A/
ALD4706B/ALD4706 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 0.1pA
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 1013Ω 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 ALD4706A/ALD4706B/ALD4706 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 ALD4706A/ALD4706B/ALD4706, with its ultra 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.
TYPICAL PERFORMANCE CHARACTERISTICS
COMMON MODE INPUT VOLTAGE RANGE
AS A FUNCTION OF SUPPLY VOLTAGE
±7
INPUTS GROUNDED
OUTPUT UNLOADED
+25°C
320
COMMON MODE INPUT
VOLTAGE RANGE (V)
SUPPLY CURRENT (µA)
SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
-25°C
TA = -55°C
240
160
80
0
±1
±4
±3
±2
±1
0
±2
±3
±4
SUPPLY VOLTAGE (V)
±5
0
±6
±3
±4
±5
±6
±7
10000
100
10
VS = ±2.5V
TA = 25°C
INPUT BIAS CURRENT (pA)
OPEN LOOP VOLTAGE
GAIN (V/mV)
±2
INPUT BIAS CURRENT AS A FUNCTION
OF AMBIENT TEMPERATURE
1000
VS = ±2.5V
1000
100
10
1.0
0.1
100K
1M
10M
LOAD RESISTANCE (Ω)
ALD4706A/ALD4706B
ALD4706
±1
SUPPLY VOLTAGE (V)
OPEN LOOP VOLTAGE GAIN AS A
FUNCTION OF LOAD RESISTANCE
1
10K
TA = 25°C
±5
+125°C
+70°C
0
±6
-50
-25
0
25
50
75
100
125
AMBIENT TEMPERATURE (°C)
Advanced Linear Devices
4 of 9
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
OUTPUT VOLTAGE SWING AS A FUNCTION
OF SUPPLY VOLTAGE
OPEN LOOP VOLTAGE GAIN AS A FUNCTION
OF SUPPLY VOLTAGE AND TEMPERATURE
OUTPUT VOLTAGE SWING (V)
OPEN LOOP VOLTAGE
GAIN (V/mV)
1000
100
10
-55°C ≤ TA ≤ +125°C
RL = 100KΩ
±6
-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
120
+5
+4
OPEN LOOP VOLTAGE
GAIN (dB)
VS = ±2.5V
+3
+2
+1
0
-1
-2
-3
-4
VS = ±2.5V
TA = 25°C
100
80
60
0
40
45
20
90
0
135
180
-20
-5
-50
-25
0
+25
+50
+75
+100 +125
1
10
AMBIENT TEMPERATURE (°C)
INPUT OFFSET VOLTAGE AS A FUNCTION
OF COMMON MODE INPUT VOLTAGE
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
INPUT OFFSET VOLTAGE (mV)
±3
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
10M
LARGE - SIGNAL TRANSIENT
RESPONSE
15
VS = ±2.5V
TA = 25°C
10
2V/div
VS = ±1.0V
TA = 25°C
RL = 100KΩ
CL= 25pF
500mV/div
10µs/div
5
0
-5
-10
-15
-2
-1
0
+1
+2
+3
COMMON MODE INPUT VOLTAGE (V)
LARGE - SIGNAL TRANSIENT
RESPONSE
5V/div
2V/div
ALD4706A/ALD4706B
ALD4706
SMALL - SIGNAL TRANSIENT
RESPONSE
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL= 25pF
100mV/div
10µs/div
50mV/div
Advanced Linear Devices
VS = ±2.5V
TA = 25°C
RL = 100KΩ
CL= 25pF
10µs/div
5 of 9
TYPICAL APPLICATIONS
V TO I AMPLIFIER
RAIL-TO-RAIL VOLTAGE FOLLOWER/BUFFER
V+
RLOAD = 220Ω
0V ≤ VIN ≤ 4V
-18mA ≤ ILOAD ≤ 0
-
G
20K
D
G
S
+
VIN
5V
RIN ~= 1013Ω
0.1µF
V+ = 5V
-
D
S
ALD1101
VOUT
1/4 ALD4706
2K
+
VIN
SUB
1/4 ALD4706
0≤ VIN ≤ 5V
RS = 20Ω
a) RLOAD connected to V+
PHOTO DETECTOR CURRENT TO
VOLTAGE CONVERTER
RLOAD = 560Ω
V+
V+ = 5V
-
G
2K
G
S
+
20K
D
RF = 5M
D
S
ALD1102
I
SUB
VIN
V+
1/4 ALD4706
1V ≤ V+ ≤ 12V
RAIL-TO-RAIL WINDOW COMPARATOR
+5V
20K
20K
VREF (HIGH) 3
100K
800Ω
-
1K
2
RL
20K
+
220Ω
RL = 10K
-2.5V
b) RLOAD connected to GND
TWO STAGE HIGH GAIN AMPLIFIER
V+
VOUT = 1 X RF
+
RS = 50Ω
V+ -4V ≤ VIN ≤ V+
0 ≤ ILOAD ≤ 7mA
+2.5V
-
PHOTODIODE
1/4 ALD4706
+
1/4 ALD4706
1
1/4 74 C00
VOUT
VIN
CL
1nF
8
+
5
+
7
1/4 ALD4706
1/4 ALD 4706
VREF (LOW) 6
100K
-
VIN
4
1/4 ALD4706
1.4µF
225Ω
NOTES: 1) GAIN = 20 First Stage
2) GAIN = 25 Second Stage
3) 500Hz ≤ Operating Frequency ≤ 10KHz
VOUT (LOW) for VREF (LOW) < VIN < VREF (HIGH)
HIGH INPUT IMPEDANCE RAIL-TO-RAIL PRECISION
DC SUMMING AMPLIFIER
V+ = +2.5V
V1
0.1µF
10M
+
1/4 ALD4706
V2
10M
10M
10M
VOUT
-
0.1µF
V3
V4
10M
V- ≤ VOUT ≤ V+
V- = - 2.5V
VOUT = V1 + V2 - V3 - V4
V- ≤ VIN ≤ V+
10M
RIN = 10MΩ Accuracy limited by resistor tolerances and input offset voltage
ALD4706A/ALD4706B
ALD4706
Advanced Linear Devices
6 of 9
SOIC-14 PACKAGE DRAWING
14 Pin Plastic SOIC Package
Millimeters
E
S (45°)
Dim
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-14
8.55
8.75
0.336
0.345
E
3.50
4.05
0.140
0.160
1.27 BSC
e
D
A
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
A1
e
b
S (45°)
H
L
ALD4706A/ALD4706B
ALD4706
C
ø
Advanced Linear Devices
7 of 9
PDIP-14 PACKAGE DRAWING
14 Pin Plastic DIP Package
Millimeters
E
E1
D
S
A2
A1
A
L
Inches
Dim
A
Min
Max
Min
3.81
5.08
0.105
Max
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-14
17.27
19.30
0.680
0.760
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-14
1.02
2.03
0.040
0.080
ø
0°
15°
0°
15°
e
b
b1
c
e1
ALD4706A/ALD4706B
ALD4706
ø
Advanced Linear Devices
8 of 9
CERDIP-14 PACKAGE DRAWING
14 Pin CERDIP Package
Millimeters
E E1
D
A1
s
A
L
L1
L2
b
b1
e
Inches
Dim
A
Min
Max
Min
3.55
5.08
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-14
--
19.94
--
0.785
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
ALD4706A/ALD4706B
ALD4706
ø
Advanced Linear Devices
9 of 9
Similar pages