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Analog Devices Inc. AD744JNZ
- Part No.:
- AD744JNZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD744JNZ.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:173
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Product details
Overview
AD744JNZ from Analog Devices is a precision, FET-input, high-speed monolithic operational amplifier in an 8-lead plastic DIP (N-8) package. It delivers 500 ns settling to 0.01%, 75 V/µs slew rate, 13 MHz gain bandwidth (internally compensated), and 0.0003% THD - making it ideal as a buffer for 12-/14-/16-bit DACs and ADCs in data acquisition systems.
For engineers reviewing the AD744JNZ datasheet, AD744JNZ pinout, AD744JNZ application, or AD744JNZ equivalent, this page provides verified technical context, real-world application mappings, pin-level design meaning, and validated alternative options for precision high-speed op amp selection in industrial-grade signal conditioning circuits.
Technical Context
The AD744JNZ features a single-pole dominant-pole compensation architecture enabling fast 500 ns settling to 0.01% with unity-gain inverter or noninverting gain ≥2 configurations. Its BiFET input stage delivers ultra-low input bias current (30 pA typ at +25°C) and high input impedance (3 TΩ || 5.5 pF).
External compensation via Pin 5–8 capacitor enables stable unity-gain follower operation and capacitive load drive up to 1000 pF at 10 V/µs, while decompensation between Pins 1–5 extends gain bandwidth beyond 200 MHz at G = 1000 - supporting DSP front-end preamplifier and active filter roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Settling Time (0.01%) | 0.5 µs - enables sub-µs code-to-code settling in 12-/14-/16-bit DAC buffer applications |
| Slew Rate (G = –1) | 45–75 V/µs - supports full-scale 10 V step response without distortion in fast pulse amplification |
| Gain Bandwidth (G = –1) | 8–13 MHz - ensures stable closed-loop bandwidth >1 MHz at G = 10 for active filter design |
| Total Harmonic Distortion | 0.0003% at 1 kHz - preserves signal fidelity in audio and precision measurement paths |
| Input Offset Voltage | 0.3–1.0 mV (max 2 mV over 0°C to +70°C) - maintains DC accuracy in sensor interface and calibration circuits |
| Input Bias Current | 30–100 pA at +25°C - minimizes voltage error across high-impedance feedback networks |
| Capacitive Load Drive | 1000 pF (with external CCOMP) - allows direct buffering of long cables or ADC input capacitance without oscillation |
Pinout & Package
AD744JNZ is housed in an 8-lead plastic dual-in-line package (PDIP, N-8), compliant with JEDEC MS-012-AA, with 0.300" wide body and 0.100" lead pitch. The package supports through-hole mounting and is rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (–) | Connects to internal JFET pair nulling network; used with Pin 5 for laser-trimmed offset adjustment |
| 2 | Inverting Input (–IN) | High-impedance FET input node; requires guarding and low-capacitance layout for optimal settling |
| 3 | Noninverting Input (+IN) | High-impedance FET input node; matched to Pin 2 for CMRR >78 dB at ±10 V common-mode |
| 4 | –VS | Negative supply rail; must be bypassed with 0.1 µF ceramic + 1 µF electrolytic close to Pin 4 |
| 5 | Offset Null (+) | Paired with Pin 1 for external nulling potentiometer; also serves as external compensation connection point |
| 6 | Output | Capable of ±12.5 V swing into 2 kΩ; drives ≥25 mA short-circuit current with thermal foldback |
| 7 | +VS | Positive supply rail; bypassing identical to Pin 4 required for <10 MHz PSRR stability |
| 8 | Compensation | Internal compensation node; connect to Pin 5 for external CCOMP to enable unity-gain stability or capacitive load drive |
Key Features
| Feature | Design Value |
|---|---|
| Precision BiFET input stage | 30 pA input bias current and 3 TΩ || 5.5 pF input impedance preserve gain accuracy in high-Z sensor interfaces |
| Single-pole dominant-pole compensation | Guarantees 500 ns 0.01% settling without peaking - critical for DAC output buffering where overshoot corrupts LSB integrity |
| External compensation capability | Enables stable unity-gain follower operation and 1000 pF capacitive load drive at 10 V/µs - eliminates need for external isolation resistors |
| Laser wafer drift trimming | Ensures 0.3–1.0 mV initial offset and <5 µV/°C drift - reduces system calibration overhead in industrial temperature environments |
| Decompensation support (Pins 1–5) | Extends gain bandwidth to >200 MHz at G = 1000 - suitable for RF IF amplification and high-speed DSP analog front ends |
Applications
| Output Buffer for High-Resolution DACs | ADC Input Driver |
|---|---|
Use Scenario: Driving the voltage output stage of a 16-bit AD565A DAC in ±10 V bipolar mode with 10 pF CLEAD compensation. IC Role / Device Role / Timing Role: Output buffer amplifier providing I-to-V conversion and final gain/offset correction with <500 ns total settling to ½ LSB (2.44 mV). Use Value: Maintains DAC's native 250 ns current-source settling by adding only 250 ns latency - preserving full 16-bit dynamic performance. | Use Scenario: Conditioning analog signals prior to sampling by a 14-bit SAR ADC in automated test equipment. IC Role / Device Role / Timing Role: Precision gain-stage amplifier with 0.0003% THD and 13 MHz GBW, configured as noninverting G = 2 amplifier. Use Value: Enables full-scale 10 Vpp input with <–100 dBc harmonic distortion, preventing aliasing and maintaining ENOB >13.5 bits. |
| Cable Driver for Long-Line Signal Distribution | Active Filter in Data Acquisition System |
Use Scenario: Transmitting low-distortion analog video or sensor signals over 30 m coaxial cable (≈500 pF load) in factory-floor monitoring. IC Role / Device Role / Timing Role: Unity-gain voltage follower with 20 pF external CCOMP between Pins 5–8, delivering 14 V/µs slew into 1000 pF. Use Value: Eliminates ringing and overshoot on long traces - avoids false triggering in downstream comparators or digitizers. | Use Scenario: Implementing a 4th-order Butterworth anti-aliasing filter preceding a 12-bit ADC in vibration analysis hardware. IC Role / Device Role / Timing Role: Dual-op-amp section in 3-op-amp instrumentation topology (Figure 36), operating at G = 10 with 750 kHz bandwidth. Use Value: Achieves <2 µs 0.01% settling for 10 V step - matches ADC aperture time and prevents acquisition-time errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA602AP | Higher 0.1% settling (120 ns), but higher 1.5 mV max offset and no external compensation pin; not rated for industrial temp range. | Best for lab-grade audio or benchtop instrumentation where ambient temp stays ≤+70°C. | Select OPA602AP only if sub-200 ns settling dominates over DC precision and temperature range requirements. |
| LF412CN | Slower (2 µs settling), lower GBW (4 MHz), no external compensation support; but lower cost and widely available in PDIP. | Suitable for general-purpose 12-bit DAQ where speed is secondary to BOM cost and legacy compatibility. | Choose LF412CN when budget constraints outweigh need for <1 µs settling and 0.0003% THD. |
Compared with OPA602AP and LF412CN, the AD744JNZ uniquely balances industrial temperature rating (–40°C to +85°C), 500 ns settling, external compensation flexibility, and laser-trimmed DC precision - making it the only option among the three qualified for high-reliability embedded data acquisition requiring both speed and stability across environmental extremes.
Availability
AD744JNZ is available at Aetrix Electronics and suitable for industrial data acquisition, precision DAC/ADC buffering, and high-fidelity analog signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD744JNZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD744 series belongs to Analog Devices' precision high-speed BiFET op amp product line, engineered specifically for demanding applications requiring simultaneous fast settling, low distortion, and robust DC accuracy in industrial and instrumentation environments.
FAQ
What is the maximum capacitive load the AD744JNZ can drive without external compensation?
The AD744JNZ is internally compensated for stable operation with purely resistive loads and small capacitive loads (<50 pF). Driving >50 pF without external compensation risks instability or ringing. For reliable 1000 pF drive capability, a 20 pF capacitor must be connected between Pins 5 and 8 per Figure 32 and Table II in the AD744 datasheet. This configuration achieves 14 V/µs slew rate and 1.2 MHz bandwidth while maintaining 0.01% settling.
Does the AD744JNZ support unity-gain follower configuration?
Yes, the AD744JNZ supports unity-gain follower operation, but only with external compensation: a minimum 5 pF capacitor must be connected between Pins 5 and 8 (Figure 30). Without this capacitor, the AD744JNZ is unstable in unity-gain follower mode due to phase margin limitations. The external capacitor trades bandwidth and slew rate for stability - e.g., 5 pF yields ~37 V/µs slew and 6.5 MHz bandwidth.
What is the operating temperature range specified for the AD744JNZ?
AD744JNZ is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the Ordering Guide (Page 14) and Absolute Maximum Ratings table (Page 3) of the AD744 Rev. D datasheet. It is distinct from the commercial-grade AD744JR (0°C to +70°C) and military-grade AD744TH/883B (–55°C to +125°C).
Can the AD744JNZ be used in decompensated high-gain configurations?
Yes, the AD744JNZ supports decompensation by connecting a 2–10 pF trimmer capacitor between Pins 1 and 5 (Figure 33). This cancels internal compensation and extends gain bandwidth to >200 MHz at G = 1000. Table III confirms 225 MHz gain-bandwidth product at G = 1000. Decompensation requires careful optimization per application, as manufacturing variation in internal CCOMP necessitates tuning.
How does the AD744JNZ compare to the AD711 in terms of settling performance?
The AD744JNZ offers significantly faster settling than the AD711: 500 ns to 0.01% versus >1.5 µs for the AD711. Per the Product Description (Page 1), the AD744 "offers the excellent dc characteristics of the AD711 BiFET family with enhanced settling, slew rate, and bandwidth." Both share BiFET architecture, but AD744JNZ uses advanced processing and laser trimming to achieve its superior dynamic response while retaining AD711-level DC precision.
AD744JNZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 75V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 13 MHz
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 3.5mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AD744JNZ FAQ
1.How can I place an order for AD744JNZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD744JNZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD744JNZ reliable?
The price and inventory of AD744JNZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD744JNZ is usually 5 days.
3.What payment methods are accepted for AD744JNZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD744JNZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD744JNZ?
AD744JNZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD744JNZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD744JNZ?
For technical support, including AD744JNZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD744JNZ requirements.
6.How does Aetrix verify that AD744JNZ is sourced from the original manufacturer or authorized distributors?
All AD744JNZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD744JNZ meets industry standards.
7.What is the process for return or replacement of AD744JNZ?
All AD744JNZ units undergo pre-shipment inspection (PSI). If there is an issue with AD744JNZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD744JNZ part is unused and in its original packaging.
Return procedure for AD744JNZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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