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Analog Devices Inc. AD743JRZ-16-REEL7
- Part No.:
- AD743JRZ-16-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD743JRZ-16-REEL7.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:395
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Product details
Overview
AD743JRZ-16-REEL7 from Analog Devices is an ultralow-noise, precision JFET-input operational amplifier designed for high-fidelity signal conditioning in capacitive sensor interfaces. It delivers 2.9 nV/√Hz input voltage noise at 10 kHz, 6.9 fA/√Hz input current noise at 1 kHz, and 4.5 MHz unity-gain bandwidth - enabling >140 dB dynamic range in sonar preamplifiers and hydrophone front-ends.
For engineers reviewing the AD743JRZ-16-REEL7 datasheet, AD743JRZ-16-REEL7 pinout, AD743JRZ-16-REEL7 application, or AD743JRZ-16-REEL7 equivalent, this op amp is selected where simultaneous low voltage noise and sub-nA input bias current are required - especially in charge-sensitive, high-source-impedance circuits such as accelerometer and IR detector amplifiers.
Technical Context
The AD743JRZ-16-REEL7 employs a monolithic BiFET architecture that merges bipolar-like voltage noise performance with FET-level input current (250 pA max at 25°C). Its non-phase-reversing input stage ensures stable operation beyond common-mode limits, critical for transducer interfaces with unpredictable DC offsets.
It features a 2.8 V/µs slew rate, 1000 V/mV minimum open-loop gain, and guaranteed 0.5 mV max input offset voltage - supporting precision DC-coupled gain stages without external trimming. The device operates from ±4.8 V to ±18 V supplies and draws 8.1–10.0 mA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.9 nV/√Hz @ 10 kHz - enables sub-4.2 nV/√Hz three-op-amp instrumentation amplifiers |
| Input Current Noise | 6.9 fA/√Hz @ 1 kHz - equivalent to Johnson noise of ~345 MΩ source resistance |
| Unity-Gain Bandwidth | 4.5 MHz - supports wideband filtering and fast settling (6 µs to 0.01%) |
| Input Offset Voltage | 0.5 mV max - ensures <1 µV output error in 100× gain stages with 2 kΩ load |
| Open-Loop Gain | 1000 V/mV min - provides ≥60 dB loop gain at 10 kHz for stable closed-loop accuracy |
| Supply Range | ±4.8 V to ±18 V - allows flexible rail selection to reduce input bias current via lower dissipation |
| Common-Mode Range | +13.3 V / –10.7 V - accommodates ceramic hydrophone outputs exceeding ±10 V |
Pinout & Package
AD743JRZ-16-REEL7 is supplied in a 16-lead SOIC (R-16) package with 1.27 mm pitch, 10.3 mm × 7.5 mm body, and exposed pad not connected internally. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and tape-and-reel packaged per EIA-481A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | Null Offset Adjustment | Connect external 10 kΩ potentiometer wiper to Pin 1, ends to Pins 1 & 5 for fine offset trimming |
| 2 | Inverting Input (–IN) | High-impedance FET gate node; requires matched source impedance for optimal CMRR and noise |
| 3 | Noninverting Input (+IN) | High-impedance FET gate node; balanced capacitance (≤300 pF) minimizes RTI voltage noise |
| 4 | Negative Supply (–VS) | Must be decoupled with 0.1 µF ceramic capacitor close to pin; supports down to –4.8 V |
| 6 | Output (OUT) | Capable of ±12 V swing into 2 kΩ; short-circuit protected to 40 mA continuous |
| 7 | Positive Supply (+VS) | Must be decoupled with 0.1 µF ceramic capacitor close to pin; supports up to +18 V |
| 8–10, 12–16 | No Connect (NC) | Internally unconnected; must remain floating - no routing or grounding permitted |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow voltage + current noise combination | Enables charge-amplifier designs with >140 dB dynamic range for accelerometers and hydrophones |
| No output phase reversal on common-mode overvoltage | Eliminates latch-up risk in transducer interfaces where negative inputs exceed –10.7 V |
| Guaranteed 0.5 mV max input offset voltage | Reduces need for external nulling in DC-coupled sonar preamps operating over 0°C–70°C |
| Low input bias current (250 pA max @ 25°C) | Minimizes voltage error across high-value feedback resistors (>100 MΩ) in piezoelectric circuits |
| 4.5 MHz gain-bandwidth product | Supports stable unity-gain follower configurations with <100 ns group delay variation |
Applications
| Sonar Preamplifier | Photodiode Amplifier |
|---|---|
Use Scenario: Amplifying weak, low-frequency acoustic signals from ceramic hydrophones in underwater detection systems. IC Role / Device Role / Timing Role: First-stage charge amplifier with DC coupling and adjustable offset nulling for baseline stability. Use Value: 0.38 µVp-p (0.1–10 Hz) noise preserves microvolt-level signal integrity over 100+ dB SNR. |
Use Scenario: Converting low-current output from large-area photodiodes in spectroscopy or medical imaging. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input current noise to minimize dark-current-induced drift. Use Value: 6.9 fA/√Hz current noise ensures shot-noise-limited operation even with pA-level photocurrents. |
| Accelerometer Interface | High-Dynamic-Range Filter |
Use Scenario: Conditioning charge-output signals from piezoelectric accelerometers in structural health monitoring. IC Role / Device Role / Timing Role: Low-drift, low-noise integrator with T-network feedback for extended low-frequency response. Use Value: 2.9 nV/√Hz voltage noise + matched input capacitance balancing yields <10 nV/√Hz system RTI noise. |
Use Scenario: Implementing active analog filters requiring >140 dB stopband attenuation in test equipment. IC Role / Device Role / Timing Role: Precision gain block in multi-stage Sallen-Key or state-variable topologies. Use Value: 1000 V/mV open-loop gain ensures <0.01% gain error across 4.5 MHz bandwidth with minimal phase distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA140AIDR | Lower input bias current (0.5 pA typ), higher GBW (11 MHz), but higher voltage noise (5.1 nV/√Hz @ 10 kHz) | Better for ultra-high-Z DC-coupled sensors; less suitable for wideband low-noise AC applications | Select OPA140AIDR when input bias current dominates error budget and bandwidth >6 MHz is needed |
| LT1028CS8#PBF | Lower voltage noise (0.85 nV/√Hz), bipolar input, higher input bias current (15 nA max), no phase reversal protection | Superior for low-source-impedance (<1 kΩ) applications; unsuitable for hydrophone/accelerometer charge amps | Select LT1028CS8#PBF only when source impedance is <500 Ω and phase reversal risk is mitigated externally |
Compared with OPA140AIDR and LT1028CS8#PBF, AD743JRZ-16-REEL7 uniquely balances sub-3 nV/√Hz voltage noise, sub-1 nA input bias current, and guaranteed non-phase-reversing operation - making it the only choice for >140 dB dynamic range charge amplification across 0.1 Hz–10 kHz.
Availability
AD743JRZ-16-REEL7 is available at Aetrix Electronics and suitable for sonar preamplifiers, photodiode amplifiers, accelerometer interfaces, and high-dynamic-range filter designs requiring stable component supply across industrial temperature ranges.
Supply support for AD743JRZ-16-REEL7 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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD743 belongs to Analog Devices' precision BiFET op amp product line, engineered specifically for ultralow-noise, high-input-impedance signal conditioning in capacitive and piezoelectric sensor front-ends.
FAQ
What is the maximum input common-mode voltage range for AD743JRZ-16-REEL7?
The AD743JRZ-16-REEL7 supports a common-mode input voltage range of +13.3 V and –10.7 V with ±15 V supplies. Crucially, it does not exhibit output phase reversal when the negative common-mode limit is exceeded - a key reliability feature for hydrophone and accelerometer interfaces where transient overvoltage is common. This behavior is guaranteed across the full 0°C to 70°C operating range.
Can AD743JRZ-16-REEL7 be used in single-supply configurations?
AD743JRZ-16-REEL7 is specified for dual-supply operation (±4.8 V to ±18 V) and is not characterized for true single-supply use. While it can operate with asymmetric rails (e.g., +15 V/–5 V), its input common-mode and output swing specifications assume symmetrical supplies. For single-rail designs, consider rail-to-rail input/output op amps explicitly rated for that topology - AD743JRZ-16-REEL7 is optimized for precision dual-rail sensor signal chains.
How does AD743JRZ-16-REEL7 achieve >140 dB dynamic range?
AD743JRZ-16-REEL7 achieves >140 dB dynamic range through the synergistic combination of 2.9 nV/√Hz voltage noise at 10 kHz, 0.38 µVp-p 0.1–10 Hz flicker noise, and 250 pA max input bias current - enabling ultra-low-noise charge integration without significant DC drift. This performance is validated in application circuits like the B&K 4370 accelerometer interface, where system-level measurements confirm >140 dB SFDR.
What is the purpose of Pins 1 and 5 on AD743JRZ-16-REEL7?
Pins 1 and 5 on AD743JRZ-16-REEL7 are dedicated null offset adjustment terminals. They connect to an external 10 kΩ potentiometer (wiper to Pin 1, ends to Pins 1 and 5) to trim input offset voltage to <50 µV. This capability is essential for DC-coupled sonar preamplifiers and precision filter stages where initial offset contributes directly to output error and dynamic range loss.
Is AD743JRZ-16-REEL7 suitable for driving capacitive loads?
AD743JRZ-16-REEL7 is not unity-gain stable into pure capacitive loads. Its typical small-signal pulse response shows ringing with >100 pF, and the datasheet recommends using isolation resistors (e.g., 100 Ω in series with the output) when driving >50 pF. For direct capacitive load driving, consider op amps with enhanced capacitive-load drive capability - AD743JRZ-16-REEL7 excels in high-impedance, low-noise voltage amplification, not buffer applications.
AD743JRZ-16-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 4.5 MHz
- Current - Input Bias:
- 250 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 8.1mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 9.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AD743JRZ-16-REEL7 FAQ
1.How can I place an order for AD743JRZ-16-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD743JRZ-16-REEL7 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 AD743JRZ-16-REEL7 reliable?
The price and inventory of AD743JRZ-16-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD743JRZ-16-REEL7 is usually 5 days.
3.What payment methods are accepted for AD743JRZ-16-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD743JRZ-16-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD743JRZ-16-REEL7?
AD743JRZ-16-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD743JRZ-16-REEL7 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 AD743JRZ-16-REEL7?
For technical support, including AD743JRZ-16-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD743JRZ-16-REEL7 requirements.
6.How does Aetrix verify that AD743JRZ-16-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD743JRZ-16-REEL7 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 AD743JRZ-16-REEL7 meets industry standards.
7.What is the process for return or replacement of AD743JRZ-16-REEL7?
All AD743JRZ-16-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD743JRZ-16-REEL7, 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 AD743JRZ-16-REEL7 part is unused and in its original packaging.
Return procedure for AD743JRZ-16-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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