Transcript
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
