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Analog Devices Inc. AD746SQ/883B
- Part No.:
- AD746SQ/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD746SQ/883B.pdf
- Description:
- IC OPAMP BIFET PREC DUAL 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,716
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Product details
Overview
AD746SQ/883B from Analog Devices is a dual precision BiFET operational amplifier in an 8-pin Cerdip package, rated for –55°C to +125°C operation with MIL-STD-883B processing. It delivers 500 ns settling to 0.01%, 75 V/µs slew rate, 13 MHz gain bandwidth, and 0.0001% THD - enabling high-fidelity buffering in 12-/14-bit DAC/ADC signal chains.
For engineers reviewing the AD746SQ/883B datasheet, AD746SQ/883B pinout, AD746SQ/883B application, or AD746SQ/883B equivalent, key selection criteria include military-grade temperature stability, matched dual-channel ac/dc performance, low input bias current (110 pA typ), and guaranteed 0.5 mV max input offset voltage over full temperature range.
Technical Context
The AD746SQ/883B integrates two laser-trimmed AD744 BiFET op amps on a single monolithic die, ensuring tight matching of input offset voltage (≤0.3 mV typical), input bias current (≤110 pA), and ac characteristics including gain bandwidth (13 MHz) and settling time (500 ns). Its internal single-pole compensation supports stable unity-gain inverting and ≥2 noninverting configurations without external components.
Designed for high-speed precision systems, it features JFET-input architecture with 2.5 × 1012 Ω input impedance, 175 V/mV min open-loop gain, and differential input voltage range of ±20 V - enabling direct interfacing with wide-swing sensor outputs and reference buffers while maintaining sub-µV/°C drift control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Settling Time | 500 ns to 0.01% for 10 V step - enables accurate sampling in 12-/14-bit data acquisition systems with >1 MHz effective throughput. |
| Slew Rate | 75 V/µs minimum - supports full-scale transient response without slewing-induced distortion in fast-settling buffer stages. |
| THD | 0.0001% at 1 kHz - preserves signal fidelity in low-distortion audio and precision instrumentation amplifiers. |
| Input Offset Voltage | 0.5 mV maximum (–55°C to +125°C) - ensures minimal dc error in high-gain sensor interfaces and reference conditioning circuits. |
| Gain Bandwidth | 13 MHz at G = –1 - provides sufficient loop gain margin for stable closed-loop operation up to ~1 MHz at G = 10. |
| Input Bias Current | 110 pA typical at 25°C - minimizes voltage drop across high-impedance sources such as piezoelectric sensors or photodiode transimpedance networks. |
| Common-Mode Rejection | 78 dB minimum (±10 V CM) - rejects noise in differential front-ends where common-mode interference exceeds 10 V. |
Pinout & Package
AD746SQ/883B is housed in an 8-pin hermetic Cerdip (Q-8) package, qualified per MIL-STD-883B Rev. C for high-reliability military and aerospace applications. The package provides robust thermal performance (θJA = 110°C/W, θJC = 30°C/W) and ESD protection rated to 4000 V.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance JFET input node; requires matched source impedance for optimal THD in noninverting configurations. |
| 2 | Noninverting Input (Amplifier A) | High-impedance JFET input node; must be grounded or biased within common-mode range when unused. |
| 3 | Output (Amplifier A) | Capable of ±13.9 V / ±13.3 V swing into ≥2 kΩ load; limited to 50 pF capacitive load at unity gain. |
| 4 | Negative Supply (–VS) | Accepts –4.5 V to –18 V; requires local 0.1 µF ceramic + 1 µF tantalum bypassing for stable 13 MHz operation. |
| 5 | Noninverting Input (Amplifier B) | Matched to Pin 2; enables dual-channel synchronous buffering with <0.3 mV offset mismatch. |
| 6 | Inverting Input (Amplifier B) | Matched to Pin 1; supports identical ac/dc performance as Amplifier A for multichannel systems. |
| 7 | Output (Amplifier B) | Electrically isolated from Pin 3; crosstalk ≤–120 dB at 1 kHz enables independent channel operation. |
| 8 | Positive Supply (+VS) | Accepts +4.5 V to +18 V; shares same bypassing requirements as Pin 4 for rail integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Dual Matching | Guaranteed 0.3 mV max input offset voltage match between amplifiers - critical for differential output drivers and instrumentation amplifier topologies. |
| Laser-Trimmed DC Precision | 0.5 mV max input offset voltage and 10 µV/°C max drift over –55°C to +125°C - eliminates need for external nulling in field-deployed systems. |
| BiFET Input Architecture | 2.5 × 1012 Ω input impedance with 110 pA bias current - preserves signal integrity in high-Z sensor interfaces without loading effects. |
| MIL-STD-883B Qualification | Full screening per Method 5005 (temperature cycling), 5007 (burn-in), and 5011 (hermeticity) - ensures reliability in mission-critical avionics and defense electronics. |
| Unity-Gain Stable Compensation | Internally compensated for stable operation at G = 1 (inverting) or G ≥ 2 (noninverting) - removes external compensation design risk and layout sensitivity. |
Applications
| Dual DAC Output Buffering | Precision ADC Input Conditioning |
|---|---|
Use Scenario: Driving the analog outputs of 12- or 14-bit DACs in digital waveform generators or programmable power supplies. IC Role / Device Role / Timing Role: Dual-channel unity-gain buffer isolating DAC output impedance from load variations while preserving monotonicity and linearity. Use Value: 500 ns settling ensures <0.01% error before next sample clock edge at >1 MHz update rates; matched channels eliminate differential timing skew. | Use Scenario: Front-end signal conditioning for successive-approximation or sigma-delta ADCs in test equipment and industrial controllers. IC Role / Device Role / Timing Role: High-Z input buffer and anti-aliasing filter driver maintaining full-scale accuracy across –55°C to +125°C operating range. Use Value: 0.5 mV max offset and 10 µV/°C drift prevent calibration drift; 13 MHz bandwidth supports >1 MHz antialiasing filter cutoffs. |
| Low-Distortion Audio Preamp | Military Instrumentation Amplifier Core |
Use Scenario: First-stage preamplification in studio-grade microphone or line-level audio paths requiring ultra-low harmonic distortion. IC Role / Device Role / Timing Role: Dual-channel gain-of-2 follower providing balanced signal path with matched THD (<0.0001%) and phase response. Use Value: JFET inputs minimize current-noise contribution; 75 V/µs slew rate prevents slew-induced intermodulation distortion at 20 kHz full-scale signals. | Use Scenario: Core amplifier in ruggedized strain-gauge or thermocouple measurement modules deployed in aircraft engine monitoring systems. IC Role / Device Role / Timing Role: Dual-channel signal conditioner with MIL-qualified reliability, supporting ratiometric bridge excitation and cold-junction compensation. Use Value: Hermetic Cerdip packaging and MIL-STD-883B screening ensure operation under shock, vibration, and extended thermal cycling without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP270GP | Single-supply capable (±4.5 V to ±18 V), lower 0.25 mV max offset but only commercial/industrial temp grades (–40°C to +85°C); no MIL-STD-883B option. | Not suitable for extended military temperature range or hermetic packaging requirements. | Select OP270GP only if system operates within industrial temp range and does not require screened military reliability. |
| LMC6082IMX | CMOS input (fA bias current), rail-to-rail output, but slower 1.5 µs settling and 1.3 MHz GBW; rated only to +70°C. | Lacks speed, precision, and temperature capability for DAC/ADC buffering or military instrumentation. | LMC6082IMX fits low-power, single-supply sensor interfaces - not a functional replacement for AD746SQ/883B in high-speed precision roles. |
Compared with OP270GP and LMC6082IMX, the AD746SQ/883B uniquely combines military-grade temperature range, hermetic packaging, 500 ns settling, and guaranteed dual-channel matching - making it irreplaceable in high-reliability, high-speed precision analog signal chains where parameter stability under extreme conditions is mandatory.
Availability
AD746SQ/883B is available at Aetrix Electronics and suitable for precision data acquisition, military-grade instrumentation, and high-fidelity audio systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD746SQ/883B 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD746 product line was engineered specifically for high-speed, high-precision dual-amplifier applications demanding matched ac/dc performance, rapid settling, and operation across military temperature extremes - targeting avionics, test & measurement, and strategic instrumentation markets.
FAQ
What is the guaranteed input offset voltage specification for AD746SQ/883B over its full operating temperature range?
The AD746SQ/883B guarantees a maximum input offset voltage of 0.5 mV over the full –55°C to +125°C temperature range. This value is 100% tested and specified in the warmed-up condition after 5 minutes of operation at +25°C, with drift limited to 10 µV/°C maximum - critical for maintaining accuracy in uncalibrated military systems.
Does AD746SQ/883B require external compensation for unity-gain inverting configurations?
No, the AD746SQ/883B is internally compensated and fully stable in unity-gain inverting configurations (G = –1) as well as noninverting configurations with gain ≥2. This eliminates the need for external compensation networks, reducing board space and design uncertainty - a key advantage confirmed in the official AD746 datasheet Rev. B.
What package type and qualification standard applies to AD746SQ/883B?
The AD746SQ/883B uses an 8-pin hermetic Cerdip (Q-8) package and is processed and tested per MIL-STD-883B Rev. C, including methods 5005 (temperature cycling), 5007 (burn-in), and 5011 (hermeticity). This qualifies it for use in high-reliability aerospace and defense applications where environmental robustness is mandatory.
How does the input bias current of AD746SQ/883B compare to standard bipolar op amps?
The AD746SQ/883B features JFET-input architecture with a typical input bias current of 110 pA at +25°C - over six orders of magnitude lower than typical bipolar op amps (e.g., LM741: ~80 nA). This enables accurate amplification of signals from ultra-high-impedance sources like piezoelectric sensors without significant loading error.
Can both amplifiers inside AD746SQ/883B be used independently without performance degradation?
Yes, both amplifiers in the AD746SQ/883B operate independently with guaranteed crosstalk ≤–120 dB at 1 kHz and matched specifications (e.g., ≤0.3 mV offset mismatch). When one amplifier is unused, it must be configured as a unity-gain follower (noninverting input grounded, output tied to inverting input) per Figure 21a in the AD746 datasheet to prevent instability or increased supply current.
AD746SQ/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 75V/µs
- Gain Bandwidth Product:
- 13 MHz
- -3db Bandwidth:
- 13 MHz
- Current - Input Bias:
- 110 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
AD746SQ/883B FAQ
1.How can I place an order for AD746SQ/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD746SQ/883B 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 AD746SQ/883B reliable?
The price and inventory of AD746SQ/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD746SQ/883B is usually 5 days.
3.What payment methods are accepted for AD746SQ/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD746SQ/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD746SQ/883B?
AD746SQ/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD746SQ/883B 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 AD746SQ/883B?
For technical support, including AD746SQ/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD746SQ/883B requirements.
6.How does Aetrix verify that AD746SQ/883B is sourced from the original manufacturer or authorized distributors?
All AD746SQ/883B 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 AD746SQ/883B meets industry standards.
7.What is the process for return or replacement of AD746SQ/883B?
All AD746SQ/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD746SQ/883B, 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 AD746SQ/883B part is unused and in its original packaging.
Return procedure for AD746SQ/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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