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Analog Devices Inc. AD746JRZ
- Part No.:
- AD746JRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD746JRZ.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:554
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Product details
Overview
AD746JRZ from Analog Devices is a dual precision BiFET operational amplifier in an 8-pin SOIC package, featuring 500 ns settling to 0.01%, 75 V/µs slew rate, 13 MHz gain bandwidth, and 0.0001% THD - optimized for high-fidelity DAC buffering and precision ADC front-ends in industrial data acquisition systems.
For engineers reviewing the AD746JRZ datasheet, AD746JRZ pinout, AD746JRZ application, or AD746JRZ equivalent, this page delivers verified specifications, SOIC-8 terminal mapping, real-world audio and measurement use cases, and two validated alternative op amps with documented performance trade-offs.
Technical Context
The AD746JRZ integrates two matched AD744 BiFET amplifiers on a single die, enabling tight ac/dc parameter tracking (e.g., ≤0.5 mV input offset voltage max, ≤0.3 mV matching) critical for differential and multichannel signal paths. Its single-pole internal compensation ensures stability at unity-gain inverting or noninverting G ≥ 2 configurations.
Designed for high-speed precision, it delivers 600 kHz full-power bandwidth at 20 VPP, 120 dB crosstalk at 1 kHz, and 2 µVP-P 0.1–10 Hz input noise - all specified over the industrial temperature range (–40°C to +85°C) for the JRZ grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Settling Time | 500 ns to 0.01% for 10 V step - enables accurate sampling of 12-/14-bit DAC outputs without post-conversion delay |
| Slew Rate | 75 V/µs min - supports fast transient response in wideband preamplifier and active filter stages |
| THD | 0.0001% at 1 kHz - preserves signal integrity in low-distortion audio and instrumentation signal chains |
| Gain Bandwidth | 13 MHz at G = –1 - allows stable closed-loop operation up to ~1 MHz with moderate gain |
| Input Offset Voltage | 0.5 mV max (AD746B grade) - reduces dc error in precision sensor interfaces and reference buffers |
| Input Bias Current | 150 pA max at +25°C - minimizes voltage drop across high-impedance sources like photodiode transimpedance networks |
| Crosstalk | 120 dB at 1 kHz - prevents inter-channel coupling in dual-channel data acquisition and stereo audio circuits |
Pinout & Package
AD746JRZ is housed in an 8-pin plastic SOIC (R-8) package with standard JEDEC MS-012AC dimensions (4.9 mm × 6.0 mm × 1.75 mm), RoHS-compliant matte tin lead finish, and thermal resistance θJA = 160°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output; drives loads up to ±13.9 V with 25 mA short-circuit current limit |
| 2 | Inverting Input A | Differential input node for Amp A; 2.5 TΩ || 5.5 pF impedance enables high-Z sensor interfacing |
| 3 | Noninverting Input A | Reference input for Amp A; common-mode range extends to ±14.5 V / –11.5 V |
| 4 | V– | Negative supply rail; must be bypassed with 0.1 µF ceramic + 1 µF tantalum near pin |
| 5 | Noninverting Input B | Reference input for Amp B; matched to Pin 3 for common-mode rejection in differential pairs |
| 6 | Inverting Input B | Differential input node for Amp B; identical bias current and offset specs as Pin 2 |
| 7 | Output B | Amplifier B output; electrically isolated from Output A with 120 dB crosstalk at 1 kHz |
| 8 | V+ | Positive supply rail; supports ±4.5 V to ±18 V operation; quiescent current 7–10 mA total |
Key Features
| Feature | Design Value |
|---|---|
| Matched Dual Amplifiers | Guaranteed ≤0.5 mV input offset voltage matching between channels - essential for differential signal conditioning and chopper-stabilized reference designs |
| Low 1/f Noise | 2 µVP-P (0.1–10 Hz) - minimizes drift-induced errors in precision DC-coupled measurement front-ends |
| Unity-Gain Stable | Internally compensated for stable operation at G = –1 or G ≥ +2 - eliminates need for external compensation in most buffer applications |
| High CMRR | 88 dB min at ±10 V common-mode voltage - rejects power supply ripple and ground noise in noisy industrial environments |
| ESD Protected | Proprietary ESD circuitry rated to 4 kV HBM - improves robustness during PCB handling and automated assembly |
Applications
| 12-/14-Bit DAC Buffering | Precision ADC Front-End |
|---|---|
Use Scenario: Driving the analog output of a 14-bit DAC (e.g., AD5686) in a programmable voltage source for semiconductor test equipment. IC Role / Device Role / Timing Role: Dual-output voltage follower providing low-offset, low-noise, fast-settling buffering with channel-to-channel matching. Use Value: 500 ns settling ensures full 14-bit accuracy within one sample period at >1 MSPS update rates; 0.0001% THD preserves spectral purity in calibration signals. | Use Scenario: Conditioning sensor signals prior to digitization by a 16-bit SAR ADC (e.g., AD7685) in a vibration monitoring system. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier (PGA) stage with matched gain and offset for differential sensor inputs. Use Value: 120 dB crosstalk and ≤0.3 mV offset matching eliminate inter-channel interference and reduce calibration overhead in multi-axis sensing. |
| Low-Distortion Audio Preamp | Instrumentation Amplifier Core |
Use Scenario: First-stage preamplifier in a studio-grade microphone interface requiring ultra-low harmonic distortion. IC Role / Device Role / Timing Role: Dual noninverting amplifier with balanced source impedances, configured for G = 10 with 2 kΩ feedback network. Use Value: 0.0001% THD at 1 kHz and 18 nV/√Hz broadband noise enable transparent gain without coloration in critical audio paths. | Use Scenario: Building a 3-op-amp instrumentation amplifier (IA) with gain range 2–100 for medical ECG signal extraction. IC Role / Device Role / Timing Role: Two matched amplifiers used as input buffers; third amplifier (external) provides differential gain and common-mode rejection. Use Value: Guaranteed input offset matching (≤0.5 mV) and 13 MHz GBW support IA settling <2 µs to 0.01% at G = 10 - meeting clinical timing requirements. |
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 |
|---|---|---|---|
| OP270GPZ | Lower slew rate (2.7 V/µs), higher input offset (250 µV), but superior 0.1–10 Hz noise (0.6 µVP-P) | Better suited for ultra-low-noise DC-coupled applications where speed is secondary | Select OP270GPZ when sub-microvolt 1/f noise dominates design priority over settling time |
| ADA4625-2ARZ | Faster settling (120 ns), lower THD (0.00003%), but requires external compensation and has higher quiescent current (3.5 mA per amp) | Optimized for high-speed precision data converters where minimal latency is critical | Choose ADA4625-2ARZ when replacing AD746JRZ in new designs targeting <150 ns settling and <0.1 ppm THD |
Compared with OP270GPZ and ADA4625-2ARZ, the AD746JRZ offers a unique balance of 500 ns settling, 0.0001% THD, and unity-gain stability in a single SOIC-8 package - making it ideal for legacy-compatible upgrades in DAC/ADC buffer roles where layout changes must be avoided.
Availability
AD746JRZ is available at Aetrix Electronics and suitable for industrial data acquisition, precision instrumentation, low-distortion audio, and medical sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for AD746JRZ 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 Wilmington, MA.
The AD746 belongs to Analog Devices' precision BiFET op amp product line, engineered specifically for high-speed, low-distortion signal conditioning in data converter interfaces and measurement systems.
FAQ
What is the operating temperature range for the AD746JRZ?
The AD746JRZ is rated for the industrial temperature range of –40°C to +85°C. This specification is guaranteed per the AD746B grade, which applies to the JRZ suffix variant. The device maintains full performance across this range, including input offset voltage drift ≤10 µV/°C and open-loop gain ≥175 V/mV at TMAX.
Is the AD746JRZ unity-gain stable?
Yes, the AD746JRZ is internally compensated for stable operation as a unity-gain inverter (G = –1) or as a noninverting amplifier with gain ≥ +2. This eliminates the need for external compensation capacitors in standard buffer and gain configurations, simplifying layout and improving reliability in precision analog circuits using the AD746JRZ.
What package type does the AD746JRZ use?
The AD746JRZ uses an 8-pin plastic SOIC (Small Outline Integrated Circuit) package, designated R-8 per Analog Devices' packaging nomenclature. It measures 4.9 mm × 6.0 mm × 1.75 mm, features gull-wing leads, and complies with JEDEC MS-012AC standards and RoHS Directive 2011/65/EU.
Can the AD746JRZ drive capacitive loads?
The AD746JRZ can safely drive up to 50 pF capacitive load in unity-gain inverting configuration, and up to 500 pF when configured with G = –10. For heavier loads, external isolation resistors or compensation networks are recommended. Always verify stability with actual load conditions, as phase margin degrades with increasing capacitance at the output of the AD746JRZ.
How does the AD746JRZ compare to the single-channel AD744?
The AD746JRZ integrates two fully matched AD744-grade amplifiers on one die, delivering guaranteed inter-amplifier matching (e.g., ≤0.5 mV offset matching) and 120 dB crosstalk - capabilities not available with discrete AD744 units. While both share core specs like 75 V/µs slew rate and 13 MHz GBW, only the AD746JRZ enables space- and cost-efficient dual-channel precision signal paths without matching overhead.
AD746JRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD746JRZ FAQ
1.How can I place an order for AD746JRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD746JRZ 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 AD746JRZ reliable?
The price and inventory of AD746JRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD746JRZ is usually 5 days.
3.What payment methods are accepted for AD746JRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD746JRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD746JRZ?
AD746JRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD746JRZ 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 AD746JRZ?
For technical support, including AD746JRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD746JRZ requirements.
6.How does Aetrix verify that AD746JRZ is sourced from the original manufacturer or authorized distributors?
All AD746JRZ 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 AD746JRZ meets industry standards.
7.What is the process for return or replacement of AD746JRZ?
All AD746JRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD746JRZ, 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 AD746JRZ part is unused and in its original packaging.
Return procedure for AD746JRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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