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Analog Devices Inc. LT1366CS8#PBF
- Part No.:
- LT1366CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1366CS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,714
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Product details
Overview
LT1366CS8#PBF from Analog Devices (formerly Linear Technology) is a dual precision rail-to-rail input/output operational amplifier in an 8-lead SOIC package. It delivers 400kHz gain-bandwidth, 0.13V/µs slew rate, 150µV typical input offset voltage, 90dB common-mode rejection, and operates from 1.8V to ±15V supplies. It is used in low-voltage signal conditioning, supply current sensing at either rail, and A/D converter driving.
For engineers reviewing the LT1366CS8#PBF datasheet, LT1366CS8#PBF pinout, LT1366CS8#PBF application, or LT1366CS8#PBF equivalent, key selection criteria include rail-to-rail I/O swing with <120mV output saturation at 2.5mA load, 375µA per amplifier supply current, and stability with ≤1000pF capacitive loads - critical for precision sensor interfaces and battery-powered instrumentation.
Technical Context
The LT1366CS8#PBF employs a dual-input-stage architecture: a PNP pair active near the negative rail and an NPN pair active near the positive rail, seamlessly stitched via comparator Q5 to maintain rail-to-rail common-mode range. Its complementary bipolar process ensures matched output device characteristics for symmetrical swing.
It uses conventional internal compensation optimized for unity-gain stability with capacitive loads up to 1000pF - unlike the LT1368/LT1369 variants that require a 0.1µF external output capacitor. This makes LT1366CS8#PBF suitable for direct-drive applications without added external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 400kHz - supports stable closed-loop operation up to ~40kHz at unity gain with adequate phase margin. |
| Slew Rate | 0.13V/µs - enables accurate reproduction of signals up to ~20kHz at 1V peak without slew-induced distortion. |
| Input Offset Voltage (typ) | 150µV - contributes ≤0.015% error in 1V full-scale measurements, critical for 12-bit+ precision systems. |
| CMRR (typ) | 90dB - rejects 99.99% of common-mode interference across rail-to-rail input range, essential for high-side current sensing. |
| Supply Current per Amp | 375µA - allows dual-channel operation below 1mA total, enabling use in always-on, low-power monitoring circuits. |
| Output Swing (2.5mA load) | VOH = VCC–0.15V, VOL = VEE+0.23V - delivers true rail-to-rail dynamic range into moderate loads, preserving ADC input headroom. |
| Input Bias Current (typ) | 10nA - minimizes voltage drop across high-impedance sources (e.g., pH electrodes, photodiode transimpedance feedback), reducing measurement drift. |
Pinout & Package
LT1366CS8#PBF is housed in an 8-lead plastic SOIC (S8) package with standard dual op amp pinout and JEDEC MS-012AC footprint. Thermal resistance θJA = 190°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A; drives external load or feedback network directly. |
| 2 | –IN A | Inverting input A; accepts feedback signal or differential input in inverting configuration. |
| 3 | +IN A | Non-inverting input A; high-impedance node for reference, sensor, or signal source connection. |
| 4 | V– | Negative supply rail; must be connected to system ground or negative voltage; serves as return path for both amplifiers. |
| 5 | V+ | Positive supply rail; powers both amplifiers; supports single-supply (1.8V–36V) or split-supply (±15V max) operation. |
| 6 | OUT B | Inverting amplifier output B; electrically isolated from OUT A; enables dual-channel signal processing on one die. |
| 7 | –IN B | Inverting input B; independent of Channel A; supports separate feedback or signal paths. |
| 8 | +IN B | Non-inverting input B; fully differential input capability when paired with +IN A and –IN A. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from V– to V+, eliminating level-shifting circuitry in single-supply systems. |
| Rail-to-rail output swing | Delivers >99% of full supply voltage range under 2.5mA load, maximizing dynamic range for ADC drivers. |
| Low input offset voltage drift | 2µV/°C max - limits thermal-induced error to <150µV over 75°C ambient shift, ensuring stable calibration. |
| High open-loop gain | 1,000,000 V/V (120dB) driving 10kΩ - enables precise closed-loop gain accuracy (<0.01% error) in precision instrumentation. |
| Stable with capacitive loads ≤1000pF | No external compensation required - simplifies layout and avoids instability risks in PCB traces or long cables. |
Applications
| Rail-to-Rail Buffer Amplifiers | Low Voltage Signal Processing |
|---|---|
Use Scenario: Buffering high-impedance sensors (e.g., thermocouples, piezoelectric elements) into successive stages without signal attenuation or clipping. IC Role / Device Role / Timing Role: Unity-gain voltage follower providing high input impedance (>1012Ω) and low output impedance (<100Ω) across full supply range. Use Value: Preserves small-signal integrity by eliminating loading errors and enabling direct interface to 12-bit+ SAR ADCs with no headroom loss. | Use Scenario: Signal conditioning in battery-powered medical devices operating from 2.4V Li-ion cells. IC Role / Device Role / Timing Role: Dual-channel amplifier performing gain, filtering, and level-shifting for analog front-end (AFE) before digitization. Use Value: 375µA per amplifier enables continuous operation for >1 year on a 200mAh coin cell, while rail-to-rail I/O maximizes usable voltage range. |
| Supply Current Sensing at Either Rail | Driving A/D Converters |
Use Scenario: High-side or low-side current monitoring in power management ICs for portable electronics. IC Role / Device Role / Timing Role: Precision difference amplifier configured with external sense resistor to measure load current referenced to V+ or V–. Use Value: 90dB CMRR rejects supply noise during transient load events, and 150µV VOS ensures <1% error at 100mA sense current with 10mΩ shunt. | Use Scenario: Driving the input of a 16-bit sigma-delta ADC in industrial data acquisition modules. IC Role / Device Role / Timing Role: Low-noise, low-distortion buffer isolating sensitive ADC inputs from noisy digital or switching supply domains. Use Value: 29nV/√Hz input voltage noise and <0.001% THD+N at 1kHz ensure effective resolution >15.5 bits without degrading ADC performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1366CN8#PBF | Dual rail-to-rail op amp in 8-lead PDIP; identical electrical specs but higher θJA (130°C/W vs 190°C/W) and through-hole mounting. | Preferred for prototyping, breadboarding, or legacy through-hole PCBs; unsuitable for space-constrained SMT designs. | Select LT1366CN8#PBF only when manual assembly or socket-based testing is required; LT1366CS8#PBF is optimal for production SMT. |
| AD8602ARZ | Fully rail-to-rail CMOS op amp; lower supply current (600µA total), higher GBW (10MHz), but VOS = 500µV typ and limited drive (15mA). | Better for high-speed, low-power, low-voltage logic-level interfacing; less suitable for precision current sensing or heavy capacitive loads. | Choose AD8602ARZ for bandwidth-critical, ultra-low-power apps; retain LT1366CS8#PBF where offset, drive strength, and capacitive load stability are prioritized. |
Compared with LT1366CN8#PBF, LT1366CS8#PBF offers superior thermal performance in compact layouts and eliminates through-hole assembly steps; versus AD8602ARZ, it trades bandwidth for lower offset, higher output drive, and guaranteed stability with 1000pF loads - making it more robust in precision analog front-ends.
Availability
LT1366CS8#PBF is available at Aetrix Electronics and suitable for precision instrumentation, battery-powered medical devices, and industrial current-sensing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1366CS8#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 precision analog portfolio, renowned for high-performance op amps, references, and power management ICs targeting demanding industrial and instrumentation markets.
The LT1366 series belongs to Linear's precision rail-to-rail op amp family, designed specifically for applications demanding wide supply range, low offset, and true rail-to-rail I/O in space- and power-constrained environments.
FAQ
What is the maximum capacitive load the LT1366CS8#PBF can drive without oscillation?
The LT1366CS8#PBF is internally compensated for stable operation with capacitive loads up to 1000pF. This specification is verified across temperature and supply conditions per the datasheet's "Capacitive Load Handling" plot (TPC19). Exceeding 1000pF may cause peaking or ringing; for heavier loads, consider adding a series isolation resistor or selecting the LT1368CS8#PBF variant with external 0.1µF compensation.
Does the LT1366CS8#PBF support single-supply operation down to 1.8V?
Yes, the LT1366CS8#PBF is fully specified for single-supply operation from 1.8V to 36V, including rail-to-rail input and output functionality at 1.8V. Electrical characteristics such as input offset voltage (max 575µV), CMRR (min 80dB), and output swing (VOL ≤ 120mV at 2.5mA) are guaranteed across this range per the "Electrical Characteristics" table (page 4, l column).
What is the typical input bias current of the LT1366CS8#PBF, and how does it vary with common-mode voltage?
The LT1366CS8#PBF exhibits a typical input bias current of 10nA at VCM = VCC and –10nA at VCM = VEE, with a maximum shift of 90nA across the full rail-to-rail input range. This behavior stems from its dual-input-stage architecture: the PNP stage dominates near VEE, the NPN stage near VCC, and bias current crosses zero near mid-supply - as confirmed in Figure 2 (F02) of the datasheet.
Can the LT1366CS8#PBF be used as a direct replacement for older dual op amps like the LM358 in existing designs?
The LT1366CS8#PBF shares the same 8-pin SOIC pinout as the LM358 and offers superior performance: rail-to-rail I/O, lower offset (150µV vs 2mV), higher CMRR (90dB vs 70dB), and wider supply range (1.8V–36V vs 3V–32V). However, due to its higher gain-bandwidth (400kHz vs 1MHz) and different internal compensation, layout review is recommended - especially for high-frequency feedback networks - though no PCB changes are required for basic DC-coupled applications.
What is the guaranteed input offset voltage match between the two amplifiers in the LT1366CS8#PBF?
The LT1366CS8#PBF guarantees a maximum input offset voltage match (channel-to-channel VOS difference) of 425µV over the 0°C to 70°C temperature range, measured at both VCM = VEE and VCM = VCC (per page 4, "∆VOS Input Offset Voltage Shift" row, l column). This tight matching enables precision differential signal conditioning and dual-amplifier configurations like instrumentation amplifiers.
LT1366CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.13V/µs
- Gain Bandwidth Product:
- 400 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 370µA (x2 Channels)
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1366CS8#PBF FAQ
1.How can I place an order for LT1366CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1366CS8#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 LT1366CS8#PBF reliable?
The price and inventory of LT1366CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1366CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1366CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1366CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1366CS8#PBF?
LT1366CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1366CS8#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 LT1366CS8#PBF?
For technical support, including LT1366CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1366CS8#PBF requirements.
6.How does Aetrix verify that LT1366CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1366CS8#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 LT1366CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1366CS8#PBF?
All LT1366CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1366CS8#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 LT1366CS8#PBF part is unused and in its original packaging.
Return procedure for LT1366CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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