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Part: AD744TA/883B
Category:
Analog & Mixed-Signal Processing
-> Amplifiers
-> High Speed/Video Amplifiers
Description: Precision, 500 NS Settling BiFET op Amp
Company: Analog Devices
Datasheet: Download AD744TA/883B datasheet File size : 464 kB
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Datasheet text preview:
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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 0.5 mV max Offset Voltage (AD744B) 10 V/ C max Drift (AD744B) 250 V/mV min Open-Loop Gain (AD744B) Available in Plastic Mini-DIP, Plastic SOIC, Hermetic Cerdip, Hermetic Metal Can Packages and Chip Form 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-Lead Plastic Mini-DIP (N) 8-Lead SOIC (R) Package and 8-Lead Cerdip (Q) Packages
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. 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 five performance grades. The AD744J and AD744K are rated over the commercial temperature range of 0°C to +70°C. The AD744A and AD744B are rated over the industrial temperature range of 40°C to +85°C. The AD744T is rated over the military temperature range of 55°C to +125°C and is available processed to MIL-STD-883B, Rev. C. The AD744 is available in an 8-lead plastic mini-DIP, 8-lead small outline, 8-lead cerdip or TO-99 metal can.
PRODUCT HIGHLIGHTS
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 t e c h n o l o g y , 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.
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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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000
AD744SPECIFICATIONS
Model INPUT OFFSET VOLTAGE 1 Initial Offset Offset vs. Temp. vs. Supply2 vs. Supply Long-Term Stability INPUT BIAS CURRENT 3 Either Input Either Input @ T MAX = 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 Conditions TMIN to TMAX
(@ +25 C and
Min Typ 0.3 5 95 15
15 V dc, unless otherwise noted)
AD744K/B/T
Max 1.0 2 20 88 88 Min Typ 0.25 5 100 15 100 2.3 6.4 102 150 50 1.1 3.2 52 9 50 0.75 30 0.7 1.9 31 40 10 0.2 0.6 10 13 1.2 75 0.5 100 2.3 6.4 102 150 50 1.1 3.2 52 Max 0.5 1.0 10 Unit mV mV µV/°C dB dB µV/month pA nA nA nA pA pA nA nA nA MHz MHz V/µs µs
AD744J/A/S
TMIN to TMAX
82 82
V CM = 0 V V CM = 0 V 70 °C 85 °C 125 °C VCM = +10 V V CM = 0 V V CM = 0 V 70 °C 85 °C 125 °C G = 1 VO = 20 V p-p G = 1 G = 1 f = 1 kHz R1 2 k VO = 3 V rms 8 45
30 0.7 1.9 31 40 20 0.4 1.3 20 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
% || pF || pF V V V dB dB dB dB 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
± 20 +14.5, 11.5 11 V CM = ± 1 0 V TMIN to TMAX V CM = ± 1 1 V TMIN to TMAX 0.1 to 10 Hz f = 10 Hz f = 100 Hz f = 1 kHz f = 10 kHz f = 1 kHz V O = ± 10 V RLOAD 2 k TMIN to TMAX RLOAD 2 k TMIN to TMAX Short Circuit Gain = 1 200 100 +13, 12.5 ± 12 78 76 72 70 88 84 84 80 2 45 22 18 16 0.01 400 250 100 +13, 12.5 ± 12 1000 ± 15 3.5 +13 11 82 80 78 74
± 20 +14.5, 11.5 +13 88 84 84 80 2 45 22 18 16 0.01 400
INPUT VOLTAGE NOISE
INPUT CURRENT NOISE OPEN LOOP GAIN 7
OUTPUT CHARACTERISTICS Voltage Current Capacitive Load8 POWER SUPPLY Rated Performance Operating Range Quiescent Current
+13.9, 13.3 +13.8, 13.1 25
+13.9, 13.3 +13.8, 13.1 25 1000 ± 15 3.5
± 4.5
± 18 5.0
± 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. All min and max specifications are guaranteed.
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AD744
ABSOLUTE MAXIMUM RATINGS 1
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 . . . . . . . . . . . . . . . . . . . . . . . . . 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; 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-Lead Plastic Package: JA = 100°C/Watt, JC = 33°C/Watt 8-Lead Cerdip Package: JA = 110°C/Watt, JC = 22°C/Watt 8-Lead Metal Can Package: JA = 150°C/Watt, JC = 65°C/Watt 8-Lead 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.
ORDERING GUIDE
Model AD744JN AD744KN AD744JR AD744KR AD744AQ AD744BQ AD744AH AD744JCHIPS AD744JR-REEL AD744JR-REEL 7 AD744KR-REEL AD744KR-REEL 7 AD744TA/883B
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 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 55°C to +125°C
Package Option* N-8 N-8 SO-8 SO-8 Q-8 Q-8 H-08A Die Tape/Reel 13" Tape/Reel 7" Tape/Reel 13" Tape/Reel 7" H-08
*N = Plastic DIP; SO = Small Outline IC; Q = Cerdip; H = TO-99 Metal Can.
METALIZATION PHOTOGRAPH
Contact factory for latest dimensions. Dimensions shown in inches and (mm).
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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
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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
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