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Analog Devices Inc. LT1113ACN8#PBF
- Part No.:
- LT1113ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1113ACN8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,838
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Product details
Overview
LT1113ACN8#PBF from Analog Devices (formerly Linear Technology) is a dual low-noise, precision JFET-input operational amplifier in an 8-lead PDIP package. It delivers 4.5nV/√Hz input voltage noise at 1kHz, 0.4mV max input offset voltage, and 5.6MHz gain bandwidth under ±15V supplies - optimized for hydrophone amplifiers, piezoelectric accelerometer front ends, and low-current-noise instrumentation systems.
For engineers reviewing the LT1113ACN8#PBF datasheet, LT1113ACN8#PBF pinout, LT1113ACN8#PBF application, or LT1113ACN8#PBF equivalent, key selection criteria include verified 100% tested voltage noise ≤6nV/√Hz, guaranteed matching specifications for instrumentation amplifier topologies, SO-8/PDIP pin compatibility with OPA2111/OPA2604, and stable operation with ≥1000pF capacitive loads.
Technical Context
The LT1113ACN8#PBF integrates two fully independent JFET-input op amps sharing only supply rails, each unconditionally stable at unity gain with up to 1000pF load capacitance. Its architecture features large-area input JFETs to minimize voltage noise while maintaining picoampere-level bias currents (≤450pA warmed up) and high input resistance (>10¹¹Ω).
It supports dual-supply operation from ±5V to ±20V, with full electrical characterization across –40°C to +85°C. Matching parameters - including ∆VOS ≤2.5mV, ∆IB⁺ ≤80pA, and ∆CMRR ≥76dB - are guaranteed for applications requiring correlated performance between channels, such as three-op-amp instrumentation amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4.5nV/√Hz at 1kHz - enables detection of sub-µV signals from high-Z capacitive transducers |
| Input Bias Current | ≤450pA (warmed up) - minimizes IR error in >100MΩ sensor interfaces |
| Offset Voltage | ≤1.5mV (max) - reduces DC error in precision DC-coupled gain stages |
| Gain Bandwidth | 5.6MHz (typ) - supports stable closed-loop gains up to 100 with bandwidth >50kHz |
| Common-Mode Range | –10.5V to +13.5V (±15V supplies) - accommodates rail-to-rail input swing in single-ended sensor buffering |
| Supply Voltage | ±5V to ±20V - allows low-power ±5V operation or high-dynamic-range ±15V use |
| Channel Separation | 130dB at 10Hz - prevents crosstalk-induced distortion in dual-channel signal conditioning |
Pinout & Package
LT1113ACN8#PBF uses an 8-lead plastic dual in-line package (PDIP-N8) with industry-standard pinout compatible with OPA2111 and OPA2604. Thermal resistance θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives 10kΩ loads to ±13.5V with <0.1% THD+N |
| 2 | –IN A | Inverting input of Amp A - high-Z node sensitive to PCB leakage and guarding |
| 3 | +IN A | Noninverting input of Amp A - matched to Pin 5 for common-mode rejection |
| 4 | V– | Negative supply rail - must be decoupled within 1cm of Pin 4 with ≥0.1µF ceramic |
| 5 | +IN B | Noninverting input of Amp B - electrically isolated but thermally coupled to Amp A |
| 6 | –IN B | Inverting input of Amp B - shares same layout constraints as Pin 2 |
| 7 | OUT B | Amplifier B output - independent settling (4.2µs to 0.01%) from Amp A |
| 8 | V+ | Positive supply rail - requires local 0.1µF + 10µF parallel decoupling |
Key Features
| Feature | Design Value |
|---|---|
| 100% tested voltage noise | Guaranteed ≤6nV/√Hz max ensures consistent low-noise performance across production lots |
| Matched dual architecture | ∆VOS ≤2.5mV and ∆PSRR ≥82dB enable precise 3-op-amp instrumentation amplifier designs |
| Capacitive load tolerance | Stable with ≥1000pF loads eliminates need for isolation resistors in ADC driver applications |
| Wide supply range | Operates from ±5V to ±20V - supports low-power portable systems and high-voltage industrial sensors |
| No phase reversal | Maintains correct polarity even when inputs exceed V–/V+ - prevents servo lock-up |
Applications
| Hydrophone Signal Conditioning | Piezoelectric Accelerometer Front End |
|---|---|
Use Scenario: Amplifying µV-level acoustic signals from underwater hydrophones with 100pF–5000pF source capacitance. IC Role / Device Role / Timing Role: First-stage charge/voltage amplifier providing gain ≥20 with DC servo stabilization. Use Value: 4.5nV/√Hz noise floor preserves SNR in deep-ocean sensing; 100% tested noise ensures batch consistency. | Use Scenario: Conditioning high-impedance outputs from MEMS or ceramic accelerometers in structural health monitoring. IC Role / Device Role / Timing Role: Low-bias-current transimpedance amplifier converting charge to voltage with minimal drift. Use Value: ≤450pA bias current prevents >100mV offset error across 100MΩ transducer impedances at 85°C. |
| Low-Noise Instrumentation Amplifier Core | Active Filter for Precision Sensor Outputs |
Use Scenario: Building 3-op-amp instrumentation amplifiers for medical ECG or strain-gauge bridges. IC Role / Device Role / Timing Role: Dual-matched core providing gain, CMRR enhancement, and offset cancellation. Use Value: Guaranteed ∆VOS ≤2.5mV and ∆CMRR ≥76dB reduce system offset drift by >5× vs discrete op amp pairs. | Use Scenario: Implementing 4th-order low-pass filters on piezoresistive pressure sensor outputs. IC Role / Device Role / Timing Role: Dual-channel active filter stage with matched pole placement and gain accuracy. Use Value: 5.6MHz GBW supports 100kHz filter cutoffs with <0.1dB passband ripple; channel separation >126dB prevents intermodulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2111AP | Higher 1/f corner (100Hz vs 120Hz), 8.5nV/√Hz typical noise, no guaranteed matching specs | Lacks ∆VOS/∆CMRR guarantees - unsuitable for precision instrumentation amplifier cores | Select LT1113ACN8#PBF when matched dual performance and 100% noise testing are required |
| OPA2604AP | 12nV/√Hz noise, 20MHz GBW, higher 1.2nA bias current, no warm-up IB specification | Better speed but 2.7× higher voltage noise - inferior for sub-100µV signal amplification | Choose LT1113ACN8#PBF for hydrophone/accelerometer front ends where voltage noise dominates |
Compared with OPA2111AP and OPA2604AP, the LT1113ACN8#PBF provides the lowest verified voltage noise, guaranteed matching parameters for instrumentation topologies, and superior bias current stability over temperature - making it the optimal choice for high-sensitivity, high-impedance sensor interfaces demanding long-term DC accuracy.
Availability
LT1113ACN8#PBF is available at Aetrix Electronics and suitable for hydrophone signal conditioning, piezoelectric accelerometer front ends, and low-noise instrumentation amplifier designs requiring stable component supply across industrial, aerospace, and test equipment programs.
Supply support for LT1113ACN8#PBF 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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs with rigorous characterization and application-focused design.
The LT1113 product line was engineered specifically for ultra-low-noise, high-input-impedance signal conditioning of capacitive and piezoelectric sensors - emphasizing voltage noise, bias current stability, and channel-to-channel matching in dual configurations.
FAQ
What is the maximum capacitive load the LT1113ACN8#PBF can drive without oscillation?
The LT1113ACN8#PBF is unconditionally stable driving capacitive loads up to 1000pF with unity-gain configuration. This is verified per manufacturer testing and eliminates the need for series isolation resistors in ADC driver or cable-driving applications. For loads >1000pF, external compensation (e.g., feedback capacitor CF) is recommended per Figure 5 in the datasheet.
Does the LT1113ACN8#PBF require external DC servo circuitry for hydrophone applications?
The LT1113ACN8#PBF does not require external DC servo circuitry but benefits significantly from it in hydrophone applications. Its 0.4mV max VOS and 15µV/°C drift are low, yet hydrophone DC offsets accumulate due to transducer leakage. The datasheet's "Low Noise Hydrophone Amplifier with DC Servo" reference design (Figure TA01) uses LT1113ACN8#PBF with integrator feedback to hold output DC error <2.5mV at TA <70°C.
How does the LT1113ACN8#PBF compare to bipolar-input op amps in low-source-resistance applications?
In low-source-resistance applications (<5kΩ), the LT1113ACN8#PBF's 4.5nV/√Hz voltage noise outperforms most dual JFET op amps but is exceeded only by the lowest-noise bipolar op amps (e.g., AD797). However, its JFET input avoids input bias current errors that plague bipolar devices in high-Z sensor interfaces - making LT1113ACN8#PBF the preferred choice when both low voltage noise and picoampere bias current are required.
Is the LT1113ACN8#PBF pin-compatible with the SO-8 variant LT1113ACS8#PBF?
Yes, the LT1113ACN8#PBF (PDIP-8) and LT1113ACS8#PBF (SO-8) share identical pinout, electrical specifications, and thermal derating guidelines. Both comply with the industry-standard dual op amp pin configuration (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+), enabling direct PCB footprint substitution where package height and thermal requirements allow.
What is the guaranteed operating temperature range for the LT1113ACN8#PBF?
LT1113ACN8#PBF is specified and guaranteed over –40°C to +85°C (Industrial grade). Electrical characteristics including VOS ≤1.5mV, en ≤6nV/√Hz, and ∆VOS ≤2.5mV are validated across this full range. The part is not rated for extended military or automotive temperature grades - those require LT1113AMJ8 variants.
LT1113ACN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 3.9V/µs
- Gain Bandwidth Product:
- 5.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 300 pA
- Voltage - Input Offset:
- 450 µV
- Current - Supply:
- 5.3mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1113ACN8#PBF FAQ
1.How can I place an order for LT1113ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1113ACN8#PBF 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 LT1113ACN8#PBF reliable?
The price and inventory of LT1113ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1113ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1113ACN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1113ACN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1113ACN8#PBF?
LT1113ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1113ACN8#PBF 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 LT1113ACN8#PBF?
For technical support, including LT1113ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1113ACN8#PBF requirements.
6.How does Aetrix verify that LT1113ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1113ACN8#PBF 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 LT1113ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1113ACN8#PBF?
All LT1113ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1113ACN8#PBF, 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 LT1113ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1113ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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