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Texas Instruments LMC660AIMX-TI
- Part No.:
- LMC660AIMX-TI
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC660AIMX-TI.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:568
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Product details
Overview
LMC660AIMX-TI from Texas Instruments is a CMOS quad operational amplifier optimized for single-supply operation (+5V to +15.5V), delivering rail-to-rail output swing, ultra-low input bias current (2 fA), and low input offset voltage (3 mV). It supports precision high-impedance buffering, current-to-voltage conversion, and long-term integration in medical instrumentation and industrial control systems.
For engineers reviewing the LMC660AIMX-TI datasheet, LMC660AIMX-TI pinout, LMC660AIMX-TI application, or LMC660AIMX-TI equivalent, key selection criteria include guaranteed rail-to-rail output into 600Ω loads, 1.1 V/μs slew rate, 1.4 MHz gain-bandwidth product, and −40°C to +85°C operating temperature range with SOIC-14 packaging.
Technical Context
The LMC660AIMX-TI employs an unconventional integrator-based output stage-omitting the traditional unity-gain buffer-to achieve rail-to-rail output swing while maintaining stability under 600Ω loading. Its topology includes dual feed-forward compensation (Cf and Cff) and a push-pull output stage capable of ±21 mA sourcing/sinking at V+ = 5V.
It features input common-mode range extending to V− (ground in single-supply use), 126 dB open-loop voltage gain into 2 kΩ, and 130 dB amp-to-amp isolation. The device uses TI's Double-Poly Silicon-Gate CMOS process, enabling ultra-low bias current without sacrificing speed or noise performance (22 nV/√Hz at 1 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Rail-to-Rail Output | Swings within 170 mV of V− and 370 mV of V+ at V+ = 5V/RL = 600Ω - enables full dynamic range utilization in low-voltage single-supply systems. |
| Input Bias Current | 2 fA typical - preserves signal integrity in picoamp-level sensor interfaces and electrometer-grade circuits. |
| Slew Rate | 1.1 V/μs - supports stable 10 kHz sine-wave generation with 0.01% THD into 2 kΩ. |
| Gain-Bandwidth Product | 1.4 MHz - allows stable unity-gain follower operation and closed-loop bandwidth >100 kHz at moderate gains. |
| Supply Voltage Range | +4.75V to +15.5V - compatible with standard 5V and 12V rails, excluding 3.3V logic-only systems. |
| Operating Temperature | −40°C to +85°C - qualified for automotive under-hood and industrial ambient environments. |
| Input Offset Voltage | 3 mV max (LMC660AI grade) - ensures <100 μV error in 100× gain precision transimpedance stages. |
Pinout & Package
LMC660AIMX-TI is housed in a 14-pin SOIC (Package Drawing D) with standard quad op-amp pinout. Thermal resistance θJA = 115°C/W; RoHS-compliant, green (Br/Cl ≤1000 ppm) finish; MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | Inverting Input (−) | High-impedance node (Rin >1 TΩ); requires guard ring layout for sub-pA leakage control. |
| 2, 6, 10, 14 | Non-Inverting Input (+) | Common-mode range includes V−; valid down to −0.1 V at V+ = 5V - enables ground-referenced sensing. |
| 3, 7, 11, 12 | Output | Rail-to-rail swing; capable of ±21 mA drive into 2 kΩ at V+ = 5V - supports direct interface to ADC drivers and analog switches. |
| 4 | V− (Ground / Negative Supply) | Reference for single-supply operation; input common-mode extends to this pin - eliminates need for level-shifting circuitry. |
| 14 | V+ (Positive Supply) | Accepts 4.75V–15.5V; supply current per amplifier is 375 μA independent of V+ - simplifies power budgeting. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output into 600Ω | Delivers 4.27 V swing at V+ = 5V/RL = 600Ω - enables direct driving of legacy 600Ω audio lines or ADC reference buffers without external level-shifting. |
| Ultra-low input bias current (2 fA) | Reduces input leakage error to <100 μV in 100 MΩ feedback networks - critical for pH electrodes and piezoelectric sensor conditioning. |
| Specified performance at 2 kΩ and 600Ω loads | Guarantees 120 V/mV large-signal gain and 0.01% THD at 10 kHz into realistic loads - avoids hidden gain compression in production designs. |
| Input common-mode range includes V− | Allows direct connection of grounded sensors (e.g., thermocouples, strain gauges) without input biasing resistors - reduces component count and thermal EMF errors. |
| 130 dB amp-to-amp isolation | Minimizes crosstalk between channels in multi-channel data acquisition - preserves channel independence in 4-channel instrumentation amplifiers. |
Applications
| Medical Instrumentation | Precision Current-to-Voltage Conversion |
|---|---|
|
Use Scenario: Low-noise front-end for ECG/EEG biopotential amplifiers with dry electrodes and high-impedance sources. IC Role / Device Role / Timing Role: Quad amplifier configured as 3-op-amp instrumentation amplifier with guard-driven inputs and rail-to-rail output stage. Use Value: 2 fA input bias current prevents electrode polarization drift; rail-to-rail swing maximizes ADC dynamic range from 3.3V or 5V supplies. |
Use Scenario: Photodiode transimpedance amplifier in optical smoke detectors requiring pA-level sensitivity over temperature. IC Role / Device Role / Timing Role: Single amplifier per channel operating in transimpedance configuration with guarded inverting input and low-noise layout. Use Value: 22 nV/√Hz input voltage noise and 0.0002 pA/√Hz current noise enable detection of <10 pA photocurrents at 1 kHz bandwidth. |
| Industrial Sensor Signal Conditioning | Long-Term Integrator Circuits |
|
Use Scenario: 4–20 mA loop receiver with isolated voltage output for pressure/temperature transmitters in factory automation. IC Role / Device Role / Timing Role: Quad amplifier used for I/V conversion, filtering, level-shifting, and output buffering in single 24V supply system. Use Value: Input common-mode range including V− allows direct connection to grounded 4–20 mA sink outputs; rail-to-rail output drives 0–10V DAC references. |
Use Scenario: Analog integrator for battery coulomb counting in energy metering ICs requiring decades-long charge accumulation accuracy. IC Role / Device Role / Timing Role: One amplifier configured as precision integrator with ultra-low bias current and low offset drift (1.3 μV/°C). Use Value: 1.3 μV/°C offset drift limits integration error to <1 mV/hour over 0–85°C - enables >10-year calibration intervals in utility-grade meters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad CMOS op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC662AIMX/NOPB | Dual-channel version; identical specs per amplifier, same SOIC-8 package; lower channel count, smaller footprint. | Preferred when only two amplifiers needed - saves board space and reduces inter-channel coupling vs. quad layout. | Select LMC662AIMX/NOPB for dual-channel applications where space or cost optimization outweighs need for four independent amps. |
| TLV2464IDR | Higher supply current (650 μA/amp), lower GBW (6.4 MHz), higher input bias current (1 pA), but rail-to-rail I/O and wider supply range (2.7–6 V). | Better suited for 3.3V portable systems; not rated for >6V or −40°C operation - lacks LMC660AIMX-TI's ultra-low bias current. | Choose TLV2464IDR only for 3.3V battery-powered designs where 1 pA bias current is acceptable and extended temperature range is unnecessary. |
Compared with LMC660AIMX-TI, LMC662AIMX/NOPB offers identical per-amplifier performance in half the package size but requires two devices for four channels, increasing BOM count and layout complexity. TLV2464IDR trades ultra-low bias current and wide supply range for higher speed and 3.3V compatibility - making it unsuitable for precision pA-level or industrial temperature-range applications.
Availability
LMC660AIMX-TI is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and precision current-to-voltage conversion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMC660AIMX-TI 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal processing technologies since 1930.
The LMC660AIMX-TI belongs to TI's precision analog portfolio, designed specifically for high-impedance, low-power, single-supply applications where rail-to-rail output and femtoamp input bias current are mandatory - targeting medical, test equipment, and industrial measurement systems.
FAQ
What is the maximum capacitive load the LMC660AIMX-TI can drive stably?
The LMC660AIMX-TI may oscillate with capacitive loads above ~100 pF in unity-gain follower configuration. Stability is restored using a 50–100 Ω series resistor at the output plus a 5–10 pF feedback capacitor from output to inverting input. For loads >1 nF, a pull-up resistor to V+ (≥500 μA current) is recommended. These techniques are validated in TI's SNOSBZ3D datasheet Figures 17 and 18.
Is the LMC660AIMX-TI pin-compatible with the LM324?
Yes, the LMC660AIMX-TI is pin-for-pin compatible with the LM324 in SOIC-14 and PDIP-14 packages, as confirmed in the "TYPICAL SINGLE-SUPPLY APPLICATIONS" section of the SNOSBZ3D datasheet. However, LMC660AIMX-TI operates from +4.75V to +15.5V (vs. LM324's 3–32V), has rail-to-rail output, and delivers superior input impedance and bias current - enabling direct drop-in replacement in most LM324 designs with performance uplift.
Does the LMC660AIMX-TI support dual-supply operation?
Yes, the LMC660AIMX-TI supports dual-supply operation with V+ and V− rails, as verified by Absolute Maximum Ratings (±Supply Voltage) and Operating Ratings specifying V− = 0V to −10V. Input common-mode range includes V−, and output swing extends within 170 mV of V− at V+ = 5V - enabling true split-rail use such as ±7.5V for symmetric signal handling in audio or instrumentation circuits.
What layout practices are required to achieve the specified 2 fA input bias current?
To achieve the LMC660AIMX-TI's 2 fA input bias current, PCB layout must include guard rings surrounding both inputs and connected to the same potential (e.g., non-inverting input voltage), implemented on top and bottom layers. Surface contamination and humidity must be controlled; for ultimate performance, lifting input pins off the board ("air wiring") is recommended per Figure 21 in SNOSBZ3D. Socket use is discouraged due to leakage paths.
How does the LMC660AIMX-TI's slew rate vary with supply voltage and load?
The LMC660AIMX-TI's slew rate is specified as 1.1 V/μs at V+ = 15V (slower of positive/negative edges), and 0.8 V/μs minimum across temperature for the LMC660AI grade. It remains largely independent of supply voltage and load per AC Electrical Characteristics table, though heavy capacitive loading (>100 pF) or resistive loads <500Ω degrade effective slew due to instability-induced ringing - hence the datasheet advises avoiding loads below 500Ω.
LMC660AIMX-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 1.1V/µs
- Gain Bandwidth Product:
- 1.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.002 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.5mA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 15.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMC660AIMX-TI FAQ
1.How can I place an order for LMC660AIMX-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC660AIMX-TI 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 LMC660AIMX-TI reliable?
The price and inventory of LMC660AIMX-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC660AIMX-TI is usually 5 days.
3.What payment methods are accepted for LMC660AIMX-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC660AIMX-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC660AIMX-TI?
LMC660AIMX-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC660AIMX-TI 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 LMC660AIMX-TI?
For technical support, including LMC660AIMX-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC660AIMX-TI requirements.
6.How does Aetrix verify that LMC660AIMX-TI is sourced from the original manufacturer or authorized distributors?
All LMC660AIMX-TI 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 LMC660AIMX-TI meets industry standards.
7.What is the process for return or replacement of LMC660AIMX-TI?
All LMC660AIMX-TI units undergo pre-shipment inspection (PSI). If there is an issue with LMC660AIMX-TI, 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 LMC660AIMX-TI part is unused and in its original packaging.
Return procedure for LMC660AIMX-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC660AIMX-TI Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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