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Part: AD744JN
Category:
Description: Precision, 500 NS Settling BiFET op Amp
Company: Analog Devices
Datasheet: Download AD744JN datasheet File size : 464 kB
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FEATURES AC PERFORMANCE 500 ns Settling to 0.01% for 10 V Step 1.5 s Settling to 0.0025% for 10 V Step 75 V/ s Slew Rate 0.0003% Total Harmonic Distortion (THD) 13 MHz Gain Bandwidth Internal Compensation >200 MHz Gain Bandwidth (G = 1000) External Decompensation >1000 pF Capacitive Load Drive Capability with 10 V/ s Slew Rate External Compensation DC PERFORMANCE 0.25 mV max Offset Voltage (AD744C) 3 V/°C max Drift (AD744C) 250 V/mV min Open-Loop Gain (AD744B) 4 V p-p max Noise, 0.1 Hz to 10 Hz (AD744C) Available in Plastic Mini-DIP, Plastic SOIC, Hermetic Cerdip, Hermetic Metal Can Packages and Chip Form MIL-STD-883B Processing Available Surface Mount (SOIC) Package Available in Tape and Reel in Accordance with EIA-481A Standard APPLICATIONS Output Buffers for 12-Bit, 14-Bit and 16-Bit DACs, ADC Buffers, Cable Drivers, Wideband Preamplifiers and Active Filters PRODUCT DESCRIPTION
Precision, 500 ns Settling BiFET Op Amp AD744
CONNECTION DIAGRAMS TO-99 (H) Package 8-Pin Plastic Mini-DIP (N) 8-Pin SOIC (R) Package and 8-Pin Cerdip (Q) Packages
Alternatively, external decompensation may be used to increase the gain bandwidth of the AD744 to over 200 MHz at high gains. This makes the AD744 ideal for use as ac preamps in digital signal processing (DSP) front ends. The AD744 is available in seven performance grades. The AD744J and AD744K are rated over the commercial temperature range of 0°C to +70°C. The AD744A, AD744B and AD744C are rated over the industrial temperature range of 40°C to +85°C. The AD744S and AD744T are rated over the military temperature range of 55°C to +125°C and are available processed to MIL-STD-883B, Rev. C. Extended reliability PLUS screening is available, specified over the commercial and industrial temperature ranges. PLUS screening includes a 168-hour burn-in, as well as other environmental and physical tests. The AD744 is available in an 8-pin plastic mini-DIP, 8-pin small outline, 8-pin cerdip or TO-99 metal can.
PRODUCT HIGHLIGHTS
The AD744 is a fast-settling, precision, FET input, monolithic operational amplifier. It offers the excellent dc characteristics of the AD711 BiFET family with enhanced settling, slew rate, and bandwidth. The AD744 also offers the option of using custom compensation to achieve exceptional capacitive load drive capability. The single-pole response of the AD744 provides fast settling: 500 ns to 0.01%. This feature, combined with its high dc precision, makes it suitable for use as a buffer amplifier for 12-bit, 14-bit or 16-bit DACs and ADCs. Furthermore, the AD744's low total harmonic distortion (THD) level of 0.0003% and gain bandwidth product of 13 MHz make it an ideal amplifier for demanding audio applications. It is also an excellent choice for use in active filters in 12-bit, 14-bit and 16-bit data acquisition systems. The AD744 is internally compensated for stable operation as a unity gain inverter or as a noninverting amplifier with a gain of two or greater. External compensation may be applied to the AD744 for stable operation as a unity gain follower. External compensation also allows the AD744 to drive 1000 pF capacitive loads, slewing at 10 V/µs with full stability. REV. B
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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
1. The AD744 is a high-speed BiFET op amp that offers excellent performance at competitive prices. It outperforms the OPA602/OPA606, LF356 and LF400. 2. The AD744 offers exceptional dynamic response. It settles to 0.01% in 500 ns and has a 100% tested minimum slew rate of 50 V/µs (AD744B). 3. The combination of Analog Devices' advanced processing technology, laser wafer drift trimming and well-matched ionimplanted JFETs provide outstanding dc precision. Input offset voltage, input bias current, and input offset current are specified in the warmed-up condition; all are 100% tested. 4. The AD744 has a guaranteed and tested maximum voltage noise of 4 µV p-p, 0.1 Hz to 10 Hz (AD744C).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703
AD744SPECIFICATIONS (@ +25 C and
AD744J/A/S
Model Conditions Min Typ 0.3 5 95 15 30 0.7 1.9 31 40 20 0.4 1.3 20 13 1.2 75 0.5 100 2.3 6.4 102 150 50 1.1 3.2 52 Max INPUT OFFSET VOLTAGE 1 Initial Offset Offset TMIN to TMAX vs. Temp. vs. Supply2 vs. Supply TMIN to TMAX Long-Term Stability INPUT BIAS CURRENT 3 Either Input Either Input @ TMAX = J, K A, B, C S, T Either Input Offset Current Offset Current @ T MAX = J, K A, B, C S, T FREQUENCY RESPONSE Gain BW, Small Signal Full Power Response Slew Rate, Unity Gain Settling Time to 0.01% 4 Total Harmonic Distortion INPUT IMPEDANCE Differential Common Mode INPUT VOLTAGE RANGE Differential 5 Common-Mode Voltage Over Max Operating Range 6 Common-Mode Rejection Ratio VCM = ± 10 V TMIN to TMAX VCM = ± 11 V TMIN to TMAX INPUT VOLTAGE NOISE 0.1 to 10 Hz f = 10 Hz f = 100 Hz f = 1 kHz f = 10 kHz f = 1 kHz VO = ± 10 V RLOAD 2 k TMIN to TMAX VC M = 0 V VC M = 0 V 70°C 85°C 1 2 5° C VCM = +10 V VC M = 0 V VCM = 0 V 70°C 85°C 1 2 5° C G = 1 8 VO = 20 V p-p G = 1 45 G = 1 f = 1 kHz R1 2 k VO = 3 V rms
15 V dc, unless otherwise noted)
AD744K/B/T
Min Typ 0.25 5 100 15 30 0.7 1.9 31 40 10 0.2 0.6 10 9 50 13 1.2 75 0.5 100 2.3 6.4 102 150 50 1.1 3.2 52 9 50 0.75 Max 0.5 1.0 10 92 92 Min
AD744C
Typ 0.10 2 110 15 30 50 Max 0.25 0.45 3 Units mV mV µV/°C dB dB µV/month pA nA nA nA pA pA nA nA nA MHz MHz V/µs µs
1.0 2/2/2 20/20/ 20 88 88
82 82/82/ 82
1.9 40 10
3.2 100 20
0.6
1.3
0.75
13 1.2 75 0.5
0.75
0.0003 3 3 1012||5.5 1012||5.5
0.0003 3 3 1012||5.5 1012||5.5
0.0003 3 3 1012||5.5 1012||5.5
% || pF || pF V V V dB dB dB dB 4 µV p-p n V / H z n V / H z n V / H z n V / H z p A / H z V/mV V/mV V V mA pF V V mA
11 78 76/76/ 76 72 70/70/ 70
± 20 +14.5, 11.5 +13 88 84 84 80 2 45 22 18 16 0.01
11 82 80 78 74
± 20 +14.5, 11.5 +13 88 84 84 80 2 45 22 18 16 0.01
11 86 86 80 76
± 20 +14.5, 11.5 +13 94 90 90 84 2 45 22 18 16 0.01
INPUT CURRENT NOISE OPEN LOOP GAIN
7
200 400 100/100/100 +13, 12.5 +13.9, 13.3 ± 12/± 12/ 12 +13.8, 13.1 25 1000 ± 15 3.5
250 100 +13, 12.5 12
400
250 150 +13, 12.5 12
400
OUTPUT CHARACTERISTICS Voltage RLOAD 2 k TMIN to TMAX Current Short Circuit Capacitive Load 8 Gain = 1 POWER SUPPLY Rated Performance Operating Range Quiescent Current
+13.9, 13.3 +13.8, 13.1 25 1000 ± 15 3.5
+13.9, 13.3 +13.8, 13.1 25 1000 ± 15 3.5
4.5
18 5.0
4.5
18 4.0
4.5
18 4.0
NOTES 1 Input offset voltage specifications are guaranteed after 5 minutes of operation at TA = +25°C. 2 PSRR test conditions: +VS = 15 V, VS = 12 V to 18 V and +VS = +12 V to +18 V, VS = 15 V. 3 Bias Current Specifications are guaranteed maximum at either input after 5 minutes of operation at TA = +25°C. For higher temperature, the current doubles every 10°C. 4 Gain = 1, RL = 2 k, CL = 10 pF, refer to Figure 25. 5 Defined as voltage between inputs, such that neither exceeds ± 10 V from ground. 6 Typically exceeding 14.1 V negative common-mode voltage on either input results in an output phase reversal. 7 Open-Loop Gain is specified with VOS both nulled and unnulled. 8 Capacitive load drive specified for CCOMP = 20 pF with the device connected as shown in Figure 32. Under these conditions, slew rate = 14 V/µs and 0.01% settling time = 1.5 µs typical. Refer to Table II for optimum compensation while driving a capacitive load. Specifications subject to change without notice. Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifications are guaranteed, although only those shown in boldface are tested on all production units.
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REV. B
AD744
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V Internal Power Dissipation2 . . . . . . . . . . . . . . . . . . . . . 500 mW Input Voltage3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V Output Short Circuit Duration . . . . . . . . . . . . . . . . . Indefinite Differential Input Voltage . . . . . . . . . . . . . . . . . . +VS and VS Storage Temperature Range (Q, H) . . . . . . . . 65°C to +150°C Storage Temperature Range (N, R) . . . . . . . . 65°C to +125°C Operating Temperature Range AD744J/K . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C AD744A/B/C . . . . . . . . . . . . . . . . . . . . . . . . 40°C to +85°C AD744S/T . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to +125°C Lead Temperature Range (Soldering 60 seconds) . . . . . 300°C
NOTES 1 Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and 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. 2 Thermal Characteristics 8-Pin Plastic Package: JA = 100°C/Watt, JC = 33°C/Watt 8-Pin Cerdip Package: JA = 110°C/Watt, JC = 22°C/Watt 8-Pin Metal Can Package: JA = 150°C/Watt, JC = 65°C/Watt 8-Pin SOIC Package: JA = 160°C/Watt, JC = 42°C/Watt 3 For supply voltages less than ± 18 V, the absolute maximum input voltage is equal to the supply voltage.
ABSOLUTE MAXIMUM RATINGS 1
ORDERING GUIDE
Model AD744JN AD744KN AD744JR AD744KR AD744AQ AD744BQ AD744CQ AD744AH AD744JChips AD744JR-REEL AD744KR-REEL
Temperature Range 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 0°C to +70°C 0°C to +70°C 0°C to +70°C
Package Option* N-8 N-8 R-8 R-8 Q-8 Q-8 Q-8 H-08A Die Tape & Reel Tape & Reel
*N = Plastic DIP; R = Small Outline IC; Q = Cerdip; H = TO-99 Metal Can.
METALIZATION PHOTOGRAPH
Contact factory for latest dimensions. Dimensions shown in inches and (mm).
REV. B
3
AD744 Typical Characteristics
Figure 1. Input Voltage Swing vs. Supply Voltage
Figure 2. Output Voltage Swing vs. Supply Voltage
Figure 3. Output Voltage Swing vs. Load Resistance
Figure 4. Quiescent Current vs. Supply Voltage
Figure 5. Input Bias Current vs. Temperature
Figure 6. Output Impedance vs. Frequency
Figure 7. Input Bias Current vs. Common-Mode Voltage
Figure 8. Short Circuit Current Limit vs. Temperature
Figure 9. Gain Bandwidth Product vs. Temperature
4
REV. B
AD744
Figure 10. Open-Loop Gain and Phase Margin vs. Frequency CCOMP = 0 pF
Figure 11. Open Loop Gain and Phase Margin vs. Frequency CCOMP = 25 pF
Figure 12. Open-Loop Gain vs. Supply Voltage
Figure 13. Common-Mode and Power Supply Rejection vs. Frequency
Figure 14. Large Signal Frequency Response
Figure 15. Output Swing and Error vs. Settling Time
Figure 16. Total Harmonic Distortion vs. Frequency, Circuit of Figure 20 (G = 10)
Figure 17. Input Noise Voltage Spectral Density
Figure 18. Slew Rate vs. Input Error Signal
REV. B
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