AD712-EP Data Sheet

Dual Precision, Low Cost,
High Speed BiFET Op Amp
AD712-EP
Supports defense and aerospace applications (AQEC
standard)
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
Enhanced replacement for LF412 and TL082
AC performance
Settles to ±0.01% in 1.0 μs
16 V/μs minimum slew rate
3 MHz minimum unity-gain bandwidth
DC performance
150 V/mV minimum open-loop gain
Available in a SOIC_N package
CONNECTION DIAGRAM
AMPLIFIER NO. 1
AMPLIFIER NO. 2
OUTPUT
1
8
V+
INVERTING
INPUT
OUTPUT
2
7
NONINVERTING
INPUT
3
6 INVERTING
INPUT
V–
4
AD712-EP
5
NONINVERTING
INPUT
09285-001
FEATURES
Figure 1. 8-Lead SOIC_N (R-Suffix)
GENERAL DESCRIPTION
The AD712-EP is a high speed, precision, monolithic
operational amplifier offering high performance over the
military temperature range of −55°C to +125°C. Its low offset
voltage and offset voltage drift are the results of advanced laser
wafer trimming technology. These performance benefits allow
the user to easily upgrade existing designs that use older
precision BiFET or bipolar op amps.
The superior ac and dc performance of this op amp makes it
suitable for active filter applications. With a slew rate of 16 V/μs
and a settling time of 1 μs to ±0.01%, the AD712-EP is ideal as a
buffer for 12-bit digital-to-analog converters (DACs) and 12-bit
analog-to-digital converters (ADCs) and as a high speed
integrator.
The combination of excellent noise performance and low input
current also make the AD712-EP useful for photodiode preamps.
Common-mode rejection of 88 dB and open-loop gain of
400 V/mV ensure 12-bit performance even in high speed unitygain buffer circuits.
The AD712-EP is available in an 8-lead SOIC_N package.
Additional applications information is available in the AD712
data sheet.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.
AD712-EP
TABLE OF CONTENTS
Features .............................................................................................. 1
Absolute Maximum Ratings ............................................................5
Connection Diagram ....................................................................... 1
ESD Caution...................................................................................5
General Description ......................................................................... 1
Typical Performance Characteristics ..............................................6
Revision History ............................................................................... 2
Outline Dimensions ....................................................................... 10
Specifications..................................................................................... 3
Ordering Guide .......................................................................... 10
REVISION HISTORY
8/10—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
AD712-EP
SPECIFICATIONS
VS = ±15 V @ TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT OFFSET VOLTAGE 1
Initial Offset
TMIN to TMAX
vs. Temperature
vs. Supply
TMIN to TMAX
Long-Term Offset Stability
INPUT BIAS CURRENT 2
VCM = 0 V
VCM = 0 V @ TMAX
VCM = ±10 V
INPUT OFFSET CURRENT
VCM = 0 V
VCM = 0 V @ TMAX
MATCHING CHARACTERISTICS
Input Offset Voltage
TMIN to TMAX
Input Offset Voltage Drift
Input Bias Current
Crosstalk
At f = 1 kHz
At f = 100 kHz
FREQUENCY RESPONSE
Small Signal Bandwidth
Full Power Response
Slew Rate
Settling Time to 0.01%
Total Harmonic Distortion
INPUT IMPEDANCE
Differential
Common Mode
INPUT VOLTAGE RANGE
Differential 3
Common-Mode Voltage 4
TMIN to TMAX
Common-Mode Rejection Ratio
VCM = ±10 V
TMIN to TMAX
VCM = ±11 V
TMIN to TMAX
INPUT VOLTAGE NOISE
0.1 Hz to 10 Hz
f = 10 Hz
f = 100 Hz
f = 1 kHz
f = 10 kHz
INPUT CURRENT NOISE
f = 1 kHz
Min
76
76
Typ
Max
Unit
0.3
3
4
20
mV
mV
μV/°C
dB
dB
μV/month
25
26
75
77
100
pA
nA
pA
10
11
25
26
pA
nA
3
4
20
25
mV
mV
μV/°C
pA
7
95
15
3.0
16
120
90
dB
dB
4.0
200
20
1.0
0.0003
MHz
kHz
V/μs
μs
%
3 × 1012||5.5
3 × 1012||5.5
Ω||pF
Ω||pF
±20
+14.5, −11.5
V
V
V
−VS + 4
76
76
70
70
Rev. 0 | Page 3 of 12
1.2
+VS − 2
88
84
84
80
dB
dB
dB
dB
2
45
22
18
16
μV p-p
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
0.01
pA/√Hz
AD712-EP
Parameter
OPEN-LOOP GAIN
TMIN to TMAX
OUTPUT CHARACTERISTICS
Output Voltage Swing High
TMIN to TMAX
Output Voltage Swing Low
TMIN to TMAX
Current
POWER SUPPLY
Rated Performance
Operating Range
Quiescent Current
Min
150
100
−12.5
−12.0
Typ
Max
Unit
V/mV
V/mV
13.9
13.0
12.0
V
V
V
V
mA
−13.1
25
±15
±4.5
5.0
1
±18
6.8
V
V
mA
Input offset voltage specifications are guaranteed after 5 minutes of operation at TA = 25°C.
Bias current specifications are guaranteed maximum at either input after 5 minutes of operation at TA = 25°C. For higher temperatures, the current doubles every 10°C.
3
Defined as voltage between inputs, such that neither exceeds ±10 V from ground.
4
Typically exceeding −14.1 V negative common-mode voltage on either input results in an output phase reversal.
2
Rev. 0 | Page 4 of 12
AD712-EP
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Internal Power Dissipation 1
Input Voltage 2
Output Short-Circuit Duration
Differential Input Voltage
Storage Temperature Range
Operating Temperature Range
Lead Temperature Range (Soldering 60 sec)
1
2
Rating
±18 V
±18 V
Indefinite
+VS and −VS
−65°C to +125°C
−55°C to +125°C
300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Thermal characteristics: 8-lead SOIC_N, θJA = 100°C.
For supply voltages less than ±18 V, the absolute maximum voltage is equal
to the supply voltage.
Rev. 0 | Page 5 of 12
AD712-EP
TYPICAL PERFORMANCE CHARACTERISTICS
15
10
RL = 2kΩ
25°C
5
0
5
10
SUPPLY VOLTAGE ± V
15
20
4
3
2
0
Figure 2. Input Voltage Swing vs. Supply Voltage
15
20
INPUT BIAS CURRENT (VCM = 0) (Amps)
106
15
+VOUT
–VOUT
10
RL = 2kΩ
25°C
5
0
0
5
10
SUPPLY VOLTAGE ± V
15
20
09285-003
107
108
109
1010
1011
1012
–60
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
100
120
140
Figure 6. Input Bias Current vs. Temperature
Figure 3. Output Voltage Swing vs. Supply Voltage
100
30
OUTPUT IMPEDANCE (Ω)
25
20
±15V SUPPLIES
15
10
10
1.0
0.1
5
100
1k
LOAD RESISTANCE (Ω)
10k
0.01
1k
09285-004
0
10
10k
100k
FREQUENCY (Hz)
1M
Figure 7. Output Impedance vs. Frequency
Figure 4. Output Voltage Swing vs. Load Resistance
Rev. 0 | Page 6 of 12
10M
09285-007
OUTPUT VOLTAGE SWING (V)
10
SUPPLY VOLTAGE ± V
Figure 5. Quiescent Current vs. Supply Voltage
20
OUTPUT VOLTAGE SWING (V p-p)
5
09285-006
0
5
09285-005
QUIESCENT CURRENT (mA)
6
09285-002
INPUT VOLTAGE SWING (V)
20
OPEN-LOOP GAIN (dB)
VS = 15V
25°C
50
100
80
80
60
60
40
40
GAIN
PHASE
2kΩ
100pF
LOAD
20
25
20
0
0
–5
0
5
COMMON-MODE VOLTAGE (V)
10
–20
09285-008
0
–10
100
10k
100k
1M
–20
10M
Figure 11. Open-Loop Gain and Phase Margin vs. Frequency
125
26
24
120
OPEN-LOOP GAIN (dB)
+ OUTPUT CURRENT
22
20
18
– OUTPUT CURRENT
16
115
RL = 2kΩ
25°C
110
105
14
100
–20
0
20
40
60
80
100
AMBIENT TEMPERATURE (°C)
120
140
95
09285-009
–40
0
Figure 9. Short-Circuit Current Limit vs. Temperature
5
10
SUPPLY VOLTAGE ± V
15
20
09285-012
12
10
–60
Figure 12. Open-Loop Gain vs. Supply Voltage
110
POWER SUPPLY REJECTION (dB)
5.0
4.5
4.0
3.5
100
+ SUPPLY
80
60
– SUPPLY
40
20
VS = ±15V SUPPLIES
WITH 1V p-p SINEWAVE 25°C
3.0
–60
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
140
0
10
09285-010
UNITY-GAIN BANDWIDTH (MHz)
1k
FREQUENCY (Hz)
Figure 8. Input Bias Current vs. Common-Mode Voltage
SHORT-CIRCUIT CURRENT LIMIT (mA)
10
100
1k
10k
100k
SUPPLY MODULATION FREQUENCY (Hz)
Figure 10. Unity-Gain Bandwidth vs. Temperature
Figure 13. Power Supply Rejection vs. Frequency
Rev. 0 | Page 7 of 12
1M
09285-013
INPUT BIAS CURRENT (pA)
MAX T GRADE LIMIT
75
100
09285-011
100
PHASE MARGIN (Degrees)
AD712-EP
AD712-EP
100
–70
VS = ±15V
VCM = 1V p-p
25°C
80
–80
3V rms
RL = 2kΩ
CL = 100pF
–90
THD (dB)
CMR (dB)
60
40
–100
–110
20
100
1k
10k
100k
1M
FREQUENCY (Hz)
–130
100
30
100k
1k
RL = 2kΩ
25°C
VS = ±15V
25
INPUT NOISE VOLTAGE (nV/√Hz)
20
15
10
5
1M
FREQUENCY (Hz)
10M
10
1
09285-015
0
100k
100
1
10
100
1k
FREQUENCY (Hz)
10k
100k
Figure 18. Input Noise Voltage Spectral Density
Figure 15. Large Signal Frequency Response
10
25
8
6
20
2
1% 0.1%
SLEW RATE (V/µs)
4
0.01%
0
–2
ERROR 1%
0.1%
0.01%
–4
–6
15
10
5
0.6
0.8
0.7
SETTLING TIME (µs)
0.9
1.0
09285-016
–8
–10
0.5
0
0
100
200
300
400
500
600
700
INPUT ERROR SIGNAL (mV)
(AT SUMMING JUNCTION)
Figure 19. Slew Rate vs. Input Error Signal
Figure 16. Output Swing and Error vs. Settling Time
Rev. 0 | Page 8 of 12
800
900
09285-019
OUTPUT VOLTAGE SWING (V p-p)
10k
FREQUENCY (Hz)
Figure 17. Total Harmonic Distortion (THD) vs. Frequency
Figure 14. Common-Mode Rejection (CMR) vs. Frequency
OUTPUT SWING FROM 0V TO ±VOLTS
1k
09285-018
10
09285-014
0
09285-017
–120
AD712-EP
20
15
–60
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
100
120
140
09285-020
SLEW RATE (V/µs)
25
Figure 20. Slew Rate vs. Temperature
Rev. 0 | Page 9 of 12
AD712-EP
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
1
5
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
PLANE
6.20 (0.2441)
5.80 (0.2284)
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
012407-A
8
4.00 (0.1574)
3.80 (0.1497)
Figure 21. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model 1
AD712TRZ-EP
AD712TRZ-EP-R7
1
Temperature Range
−55°C to +125°C
−55°C to +125°C
Package Description
8-Lead SOIC_N
8-Lead SOIC_N
Z = RoHS Compliant Part.
Rev. 0 | Page 10 of 12
Package Option
R-8
R-8
AD712-EP
NOTES
Rev. 0 | Page 11 of 12
AD712-EP
NOTES
©2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D09285-0-8/10(0)
Rev. 0 | Page 12 of 12
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