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Analog Devices Inc. LT1359CS#PBF
- Part No.:
- LT1359CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1359CS#PBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 4 CIRC 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:892
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Product details
Overview
LT1359CS#PBF from Analog Devices (formerly Linear Technology) is a quad high-speed voltage-feedback operational amplifier with 25MHz gain bandwidth, 600V/µs slew rate, and 2.5mA maximum supply current per amplifier. It features matched high-impedance inputs, unity-gain stability, and C-Load™ drive capability for any capacitive load - making it ideal for precision data acquisition systems, active filter stages, and photodiode transimpedance amplifiers operating from ±2.5V to ±15V supplies.
For engineers reviewing the LT1359CS#PBF datasheet, LT1359CS#PBF pinout, LT1359CS#PBF application, or LT1359CS#PBF equivalent, key selection criteria include guaranteed 115ns settling to 0.1% on a 10V step, ±12.5V output swing into 500Ω at ±15V, 8nV/√Hz input noise voltage, and 600µV max input offset voltage across temperature - all in a 14-pin SOIC package with lead-free finish.
Technical Context
The LT1359CS#PBF employs a proprietary voltage-feedback topology with current-feedback slewing behavior, enabling high-speed performance without sacrificing DC accuracy. Its input stage uses complementary NPN/PNP emitter followers for first-order bias current cancellation, while internal bootstrapped RC compensation ensures unconditional stability with capacitive loads up to 10,000pF.
This architecture delivers 20V/mV minimum DC gain (RL = 1kΩ), 98dB channel separation at ±15V, and maintains ≥14MHz gain bandwidth across ±2.5V to ±15V supplies - supporting wide dynamic range signal conditioning in multi-channel instrumentation where crosstalk and settling fidelity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 25MHz typ at ±15V - enables stable closed-loop operation up to 250kHz with gain ≥100. |
| Slew Rate | 600V/µs typ at ±15V - supports full-scale 10V steps in ≤17ns, critical for fast data acquisition front-ends. |
| Input Offset Voltage | 0.6mV max at ±15V - ensures sub-LSB error in 14-bit DAC I-to-V conversion at room temperature. |
| Input Noise Voltage | 8nV/√Hz at 10kHz - preserves SNR in low-level sensor amplification (e.g., photodiode, strain gauge). |
| Output Swing | ±12.5V min into 500Ω at ±15V - drives legacy industrial ADCs and analog multiplexers directly. |
| Supply Current | 2.5mA max per amplifier at ±15V - allows four channels in <10mA total, suitable for power-constrained portable test gear. |
| Settling Time | 115ns to 0.1%, 220ns to 0.01% (10V step, AV = –1) - meets timing budgets in 1MSPS SAR ADC drivers. |
Pinout & Package
LT1359CS#PBF is housed in a 14-lead plastic SOIC (Small Outline Integrated Circuit) package with standard 1.27mm pitch, JEDEC MS-012AC compliant footprint, and RoHS-compliant lead-free finish. Thermal resistance θJA = 150°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives 500Ω load to ±12.5V; internally compensated for capacitive loads. |
| 2 (–IN A) | Inverting input A | High-impedance node (35–80MΩ); differential input voltage transient rating ±10V. |
| 3 (+IN A) | Non-inverting input A | Matched to Pin 2 for CMRR >83dB; balanced source resistance recommended for DC accuracy. |
| 4 (+IN B) | Non-inverting input B | Independent channel input; shares same topology and noise specs as Pin 3. |
| 5 (–IN B) | Inverting input B | Same bias current and offset specs as Pin 2; channel separation >98dB prevents crosstalk. |
| 6 (OUT B) | Amplifier B output | Identical drive strength and settling to Pin 1; supports dual-channel simultaneous sampling. |
| 7 (OUT C) | Amplifier C output | Third independent output; enables 3-channel active filtering or multi-sensor conditioning. |
| 8 (V–) | Negative supply rail | Common return for all four amplifiers; must be decoupled with 0.1µF ceramic + 1µF tantalum. |
| 9 (–IN D) | Inverting input D | Fourth channel input; validated for photodiode TIA configurations with 3pF input capacitance. |
| 10 (OUT D) | Amplifier D output | Full 4-channel operation supported; each amplifier draws ≤2.5mA supply current. |
| 11 (+IN D) | Non-inverting input D | Matches Pins 3 and 4; enables common-mode rejection in 4-channel instrumentation amps. |
| 12 (+IN C) | Non-inverting input C | Supports differential pair configuration with Pin 13; used in 4th-order active filters. |
| 13 (–IN C) | Inverting input C | Paired with Pin 12 for matched gain-setting; input bias current ≤500nA ensures low drift. |
| 14 (V+) | Positive supply rail | Accepts ±2.5V to ±15V total supply; PSRR >92dB rejects supply noise in mixed-signal systems. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ drive capability | Stable with any capacitive load - eliminates need for external isolation resistors when driving coax or ADC input capacitance. |
| Unity-gain stable | No external compensation required for gain ≥1 configurations - simplifies layout and reduces BOM count in buffer applications. |
| Low input noise voltage | 8nV/√Hz at 10kHz - enables resolution of µV-level signals in medical ECG front-ends without added gain-stage noise. |
| High slew rate / low supply current ratio | 600V/µs per 2.5mA - delivers 2.4× more speed per mA than comparable 25MHz op-amps, extending battery life in portable instruments. |
| Guaranteed 0.01% settling | 220ns for 10V step - meets timing requirements for 12-bit+ SAR ADC drivers without post-acquisition waiting. |
Applications
| Photodiode Amplifier | Data Acquisition Front-End |
|---|---|
Use Scenario: Converting weak current from silicon photodiodes (e.g., in spectrophotometers or pulse oximeters) into precise voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 100kΩ–1MΩ feedback resistor, leveraging low input bias current (≤500nA) and 8nV/√Hz noise to maximize SNR. Use Value: Enables detection of sub-nA photocurrents with <1µV RMS noise floor over 10kHz bandwidth - critical for low-light biomedical sensing. | Use Scenario: Driving multiplexed 16-bit SAR ADC inputs in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Track-and-hold buffer with 115ns 0.1% settling, ensuring no missing codes during 1MSPS sampling across 4 channels. Use Value: Eliminates need for external settling-time margin, reducing system latency by 200ns per channel versus legacy op-amps. |
| Active Filter Stage | Instrumentation Amplifier Core |
Use Scenario: Implementing 4th-order Butterworth low-pass filters in audio test equipment and vibration analyzers. IC Role / Device Role / Timing Role: Quad-channel building block for cascaded 2nd-order sections, using matched AC/DC specs across all amplifiers. Use Value: Maintains phase linearity and group delay flatness to <0.5° across 250kHz passband - essential for distortion-free signal reconstruction. | Use Scenario: Constructing 3-op-amp instrumentation amplifiers for bridge sensor readout in weigh scales and pressure transducers. IC Role / Device Role / Timing Role: Dual-amplifier core (A & B) for differential gain stage, with C/D handling reference and output buffering. Use Value: Achieves >100dB CMRR at 60Hz via matched input pairs and 98dB channel separation - rejecting mains interference without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1362CS#PBF | 50MHz GBW, 800V/µs SR, 4mA supply current per amp - higher speed but 60% more power. | Better for >500kHz closed-loop bandwidth needs; less suitable for battery-powered DAQ due to current draw. | Select when full-power bandwidth >15MHz is required and thermal headroom permits higher dissipation. |
| LT1355CS#PBF | 12MHz GBW, 400V/µs SR, 1mA supply current per amp - lower speed, half the power, 0.8mV VOS max. | Optimized for portable precision instruments where 12-bit accuracy and 100kHz bandwidth suffice. | Choose for cost-sensitive, low-power applications where 25MHz capability is unnecessary. |
Compared with LT1359CS#PBF, LT1362CS#PBF trades 2.5× higher bandwidth for 60% increased supply current and reduced DC precision, while LT1355CS#PBF sacrifices 2× bandwidth and 1.5× slew rate to cut power by 60% and improve offset voltage spec - making LT1359CS#PBF the optimal balance for 25MHz-class, multi-channel, low-noise signal conditioning.
Availability
LT1359CS#PBF is available at Aetrix Electronics and suitable for industrial data acquisition systems, medical sensor interfaces, and test equipment requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LT1359CS#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT1359CS#PBF belongs to Linear Technology's precision high-speed op-amp family, designed specifically for demanding signal chain applications where speed, noise, and DC accuracy must coexist - including instrumentation, medical imaging, and automated test equipment.
FAQ
What supply voltage ranges are supported by the LT1359CS#PBF?
The LT1359CS#PBF operates from total supply voltages of ±2.5V to ±15V (5V to 30V total), with full specifications guaranteed across this range. At ±2.5V, it delivers 20MHz gain bandwidth and 100V/µs slew rate; at ±15V, it achieves 25MHz and 600V/µs. The device remains functional beyond these limits but may not meet datasheet performance.
Is the LT1359CS#PBF stable when driving large capacitive loads?
Yes, the LT1359CS#PBF incorporates C-Load™ technology and is unconditionally stable with any capacitive load, including direct coaxial cable driving. Performance degrades gracefully - bandwidth and phase margin decrease with increasing capacitance, but oscillation is prevented by internal bootstrapped RC compensation that adds stabilizing phase margin even at 10,000pF.
What is the maximum guaranteed input offset voltage for LT1359CS#PBF over temperature?
The LT1359CS#PBF has a maximum input offset voltage of 1.3mV over the full –40°C to +85°C operating temperature range, as specified in the "Electrical Characteristics" table for the I-grade version. This value includes both initial offset and drift (5–8µV/°C), ensuring predictable DC error in industrial environments.
Can LT1359CS#PBF replace LT1359CN8 in an existing design?
No - LT1359CS#PBF (14-pin SOIC) and LT1359CN8 (8-pin PDIP) are physically incompatible due to different pin counts and footprints. The LT1359CN8 is a dual op-amp variant, whereas LT1359CS#PBF is quad. For pin-compatible quad replacement in SOIC, use LT1359CS14#PBF (same part number, explicit package suffix).
Does LT1359CS#PBF require external compensation for unity-gain operation?
No, the LT1359CS#PBF is unity-gain stable and requires no external compensation components. Its internal compensation network ensures stability for closed-loop gains ≥1, simplifying design in buffer, follower, and active filter configurations without risk of peaking or oscillation.
LT1359CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 600V/µs
- Gain Bandwidth Product:
- 25 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 120 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 2mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1359CS#PBF FAQ
1.How can I place an order for LT1359CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1359CS#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 LT1359CS#PBF reliable?
The price and inventory of LT1359CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1359CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1359CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1359CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1359CS#PBF?
LT1359CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1359CS#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 LT1359CS#PBF?
For technical support, including LT1359CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1359CS#PBF requirements.
6.How does Aetrix verify that LT1359CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1359CS#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 LT1359CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1359CS#PBF?
All LT1359CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1359CS#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 LT1359CS#PBF part is unused and in its original packaging.
Return procedure for LT1359CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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