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AD744:  Precision, 500 ns Settling BiFET Op Amp

Product Details


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 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.

FEATURES and BENEFITS

AC PERFORMANCE

  • 500 ns Settling to 0.01% for 10 V Step
  • 1.5 µs Settling to 0.0025% for 10 V Step
  • 75 V/µ Slew Rate
  • 0.0003% Total Harmonic Distortion(THD)
  • 13 MHz Gain Bandwidth - Internal Compensation Compensation
  • >200 MHz Gain Bandwidth (G = 1000) External Decompensation
  • >1000 pF Capacitive Load Drive Capability with 10 V/µs Slew Rate - External Compensation

DC PERFORMANCE

  • 0.5 mV max Offset Voltage (AD744B)
  • 10 µV/°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

Functional Block Diagram for AD744

AD744 Diagram
Functional Block Diagram for AD744

Documentation

Title Content Type File Type
AD744: Precision, 500 ns Settling BiFET Op Amp Data Sheet  (Rev C, 08/2000) (pdf, 470 kB) Data Sheets PDF
AN-581: Biasing and Decoupling Op Amps in Single Supply Applications  (pdf, 166 kB) Application Notes PDF
AN-348: Avoiding Passive-Component Pitfalls  (pdf, 931 kB)
The Wrong Passive Component Can Derail Even the Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.
Application Notes PDF
AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps  (pdf, 55 kB)
So far most clamping amplifiers have relied upon an output clamping architecture and are called output clamp amps (OCAs). A new architecture called an input clamp amp (ICA) offers superior clamping accuracy and lower distortion.
Application Notes PDF
AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems  (pdf, 228 kB)
Movement towards lower power supply voltages is driven by the demand that systems consume less and less power coupled with the desire to reduce the number of power supply voltages in the system. The following applications are discussed: Single-Ended and Differential Input ADC Input Circuits, Video Line Driver, Active Filter, HDSL Transceiver, and Transformer Drive Circuits.
Application Notes PDF
AN-232: Bootstrapped IC Substrate Lowers Distortion in JFET Op Amps  (pdf, 205 kB) Application Notes PDF
MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps  (pdf, 62 kB) Tutorials PDF
MT-059: Compensating for the Effects of Input Capacitance on VFB and CFB Op Amps Used in Current-to-Voltage Converters  (pdf, 69 kB) Tutorials PDF
MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps  (pdf, 66 kB) Tutorials PDF
MT-056: High Speed Voltage Feedback Op Amps  (pdf, 109 kB) Tutorials PDF
MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR  (pdf, 104 kB) Tutorials PDF
MT-052: Op Amp Noise Figure: Don't Be Misled  (pdf, 60 kB) Tutorials PDF
MT-050: Op Amp Total Output Noise Calculations for Second-Order System  (pdf, 38 kB) Tutorials PDF
MT-049: Op Amp Total Output Noise Calculations for Single-Pole System  (pdf, 40 kB) Tutorials PDF
MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth  (pdf, 81 kB) Tutorials PDF
MT-047: Op Amp Noise  (pdf, 72 kB) Tutorials PDF
MT-033: Voltage Feedback Op Amp Gain and Bandwidth  (pdf, 251 kB) Tutorials PDF
MT-032: Ideal Voltage Feedback (VFB) Op Amp  (pdf, 65 kB) Tutorials PDF
A Stress-Free Method for Choosing High-Speed Op Amps
A decision-tree approach to making the critical decision about high-speed op amp selection, including a look at some helpful tools.
Webcasts WEBCAST
UG-101: Evaluation Board User Guide  (pdf, 189 kB) User Guides PDF
Ask The Applications Engineer-25
Op Amps Driving Capacitive Loads

(Analog Dialogue, Vol. 31, No. 2, 1997)
Analog Dialogue HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
dBm/dBu/dBv Calculator
This calculator converts between standard units of power measurement and signal strength.
Utilities and Conversions HTML
Power Dissipation vs Die Temp
This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.
Utilities and Conversions HTML
ADIsimOpAmp™
This tool will help with the selection, evaluation and troubleshooting of voltage feedback Op-Amps. It uses typical data to model the behavior of a selected amplifier. It allows a user to select an amplifier, configure a circuit, apply a signal and evaluate the performance. It is useful for checking an amplifier's spec's such as Bandwidth, Slew Rate, Input/Output Range, Gain Error, Load Current, Stability Issues and DC Errors in a given circuit.
ADIsim Design/Simulation Tools HTML
OpAmp Stability
An applet for demonstrating stability effects in opamp buffers.
Design Calculators HTML
AD744 SPICE Macro-Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD744 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD744AQ Status: Production 8 ld CerDIP 8 Ind Tube, 48 $4.60 $3.90 N  Material Info PCN Purchase
AD744BQ Status: Production CERDIP GLASS SEAL 8 Ind Tube, 48 $6.12 $5.19 N  Material Info PCN Purchase
AD744JCHIPS Status: Production CHIPS OR DIE 0 Comm. Tray, 100 - - Y  Material Info Notify Me Contact ADI
AD744JNZ Status: Production 8 ld PDIP 8 Comm. Tube, 50 $2.60 $2.49 Y  Material Info PCN Purchase
AD744JR Status: Production 8 ld SOIC 8 Comm. Tube, 98 $3.16 $3.00 N  Material Info Notify Me Purchase
AD744JRZ Status: Production 8 ld SOIC 8 Comm. Tube, 98 $2.87 $2.74 Y  Material Info Notify Me Purchase
AD744JRZ-REEL Status: Production 8 ld SOIC 8 Comm. Reel, 2500 - $2.74 Y  Material Info Notify Me Purchase
AD744JRZ-REEL7 Status: Production 8 ld SOIC 8 Comm. Reel, 1000 - $2.74 Y  Material Info Notify Me Purchase
AD744KNZ Status: Production 8 ld PDIP 8 Comm. Tube, 50 $3.70 $3.47 Y  Material Info PCN Purchase
AD744KR Status: Last Time Buy 8 ld SOIC 8 Comm. Tube, 98 $4.47 $4.19 N  Material Info PDN Purchase
AD744KR-REEL7 Status: Production 8 ld SOIC 8 Comm. Reel, 750 - $4.19 N  Material Info PDN Purchase
AD744KRZ Status: Production 8 ld SOIC 8 Comm. Tube, 98 $4.08 $3.82 Y  Material Info Notify Me Purchase
AD744KRZ-REEL Status: Production 8 ld SOIC 8 Comm. Reel, 2500 - $3.82 Y  Material Info Notify Me Purchase
AD744KRZ-REEL7 Status: Production 8 ld SOIC 8 Comm. Reel, 1000 - $3.69 Y  Material Info Notify Me Purchase
AD744TH/883B Status: Production ROUND HEADER/METAL CAN 8 Mil Tube, 100 $61.99 $55.80 N  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD744 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD744JR-EBZ Status: Production 8-Lead SOIC Bare Evaluation Board $18.25 Yes -
AD744JRZ Status: Production 8-Lead SOIC $5.74 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

Check Inventory & Purchase

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