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Texas Instruments LMC660CM/NOPB
- Part No.:
- LMC660CM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC660CM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:771
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Product details
Overview
LMC660CM/NOPB from Texas Instruments is a quad CMOS rail-to-rail output operational amplifier designed for precision single-supply operation across 4.75V–15.5V. It delivers ultra-low input bias current (2 fA), low input offset voltage (±3 mV max), 1.1 V/μs slew rate, and 1.4 MHz gain bandwidth - enabling high-impedance sensor interfacing and precision analog signal conditioning in medical instrumentation and industrial controls.
For engineers reviewing the LMC660CM/NOPB datasheet, LMC660CM/NOPB pinout, LMC660CM/NOPB application, or LMC660CM/NOPB equivalent, this page provides verified specifications, SOIC-14 package details, real-world use cases, and validated alternative options for low-leakage, wide-supply op amp selection.
Technical Context
The LMC660CM/NOPB employs a proprietary CMOS front-end with differential input stage extending common-mode range to V− and rail-to-rail output swing into 600Ω loads. Its topology includes an additional gain stage for improved sinking capability, distinguishing it from standard CMOS op amps.
It operates over –40°C to +85°C (LMC660AI grade), supports dual- and single-supply configurations, and maintains stable open-loop gain (≥2000 V/mV into 2kΩ at 15V) while delivering 22 nV/√Hz input voltage noise and >1 TΩ input resistance - critical for long-term integrators and picoamp-level current-to-voltage conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.75V to 15.5V single supply; enables direct interface with 5V/12V systems without level-shifting |
| Input Bias Current | 2 fA typical; allows use with >1 GΩ feedback resistors without significant DC error |
| Input Offset Voltage | ±3 mV max (LMC660AI); ensures <0.1% gain error in 100× amplifiers at room temperature |
| Slew Rate | 1.1 V/μs; supports 10 kHz full-scale sine wave output with ≤1% distortion into 2kΩ |
| Gain Bandwidth Product | 1.4 MHz; sets usable closed-loop bandwidth to ~140 kHz at gain = 10 |
| Output Swing | Rail-to-rail: within 150 mV of rails at 2kΩ load (15V supply); preserves dynamic range in low-voltage systems |
| Input Common-Mode Range | Includes V− (ground in single supply); eliminates need for input biasing networks |
Pinout & Package
LMC660CM/NOPB is housed in a 14-pin SOIC (D package) with exposed pad not present; JEDEC MS-012AC compliant, 8.65 mm × 3.91 mm footprint, 1.75 mm height, and 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node for reference or sensor signal routing; guard ring required for sub-pA leakage control |
| –IN A (Pin 2) | Inverting input, Channel A | Feedback node; sensitive to stray capacitance - layout requires short trace and ground guard |
| OUT A (Pin 1) | Output, Channel A | Capable of sourcing/sinking ±22 mA; requires series resistor for >100 pF capacitive loads to ensure stability |
| V+ (Pin 4) | Positive power supply | Accepts up to 15.5V; quiescent current per amplifier is independent of V+ (400 μA typical) |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input; shares same process characteristics as Channel A for matched performance |
| –IN B (Pin 6) | Inverting input, Channel B | Configurable for transimpedance or difference amplification; benefits from identical layout rules as Pin 2 |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated from OUT A; crosstalk >130 dB at 1 kHz enables simultaneous multi-channel sensing |
| OUT C (Pin 8) | Output, Channel C | Third independent output; supports 3-channel signal conditioning on single IC without inter-channel coupling |
| OUT D (Pin 14) | Output, Channel D | Fourth output; enables compact quad-channel instrumentation amplifier or multi-sensor front-end design |
| +IN C (Pin 10) | Noninverting input, Channel C | Matches Pin 3 electrical behavior; supports synchronous sampling across four channels |
| –IN C (Pin 9) | Inverting input, Channel C | Paired with Pin 10 for differential input stage; layout symmetry improves CMRR consistency |
| +IN D (Pin 12) | Noninverting input, Channel D | Enables fourth independent high-Z node; suitable for reference buffer or calibration channel |
| –IN D (Pin 13) | Inverting input, Channel D | Supports dedicated feedback path for Channel D; no shared internal nodes with other channels |
| V– (Pin 11) | Negative power supply | Connects to ground in single-supply mode; must be decoupled with 0.1 μF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 14.6 Vpp output at 15 V supply into 2 kΩ - maximizes ADC input range without external level-shifting |
| Ultra-low input bias current | 2 fA typical enables femtoamp-level current measurement in photodiode or ion-selective electrode circuits |
| Specified performance into 600Ω | Guarantees ≥100 V/mV open-loop gain at 15 V with 600Ω load - supports driving coaxial cables or low-Z sensors |
| Low offset voltage drift | 1.3 μV/°C ensures <10 μV total drift over 0–70°C - critical for unattended long-term monitoring systems |
| Input common-mode range includes V− | Eliminates need for input biasing resistors in single-supply sensor interfaces - reduces component count and thermal EMF errors |
Applications
| High-Impedance Sensor Buffer | Precision Current-to-Voltage Converter |
|---|---|
|
Use Scenario: Interfacing pH electrodes or piezoelectric sensors with output impedances >100 MΩ and signal levels <100 mV. IC Role / Device Role / Timing Role: High-Z unity-gain buffer isolating sensor from downstream circuitry while preserving signal integrity. Use Value: 2 fA input bias current prevents >10 mV error across 10 GΩ source impedance; rail-to-rail output drives 12-bit SAR ADC directly. |
Use Scenario: Converting photocurrent from avalanche photodiodes (APDs) in optical smoke detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable gain via feedback resistor network. Use Value: 22 nV/√Hz input voltage noise and 1.4 MHz GBW support 100 kHz bandwidth with <1 pA RMS noise floor at 1 MΩ feedback. |
| Long-Term Integrator | Medical Instrumentation Front-End |
|
Use Scenario: Charge integration for radiation dosimetry or electrochemical gas sensing over minutes-to-hours timescales. IC Role / Device Role / Timing Role: Ultra-low-drift integrator using LMC660CM/NOPB's 1.3 μV/°C offset drift and femtoamp bias current. Use Value: Integrator time constant stability exceeds 0.01%/hour due to sub-pA leakage; enables >24-hour drift-free accumulation. |
Use Scenario: Biopotential acquisition in portable ECG monitors requiring DC-coupled, low-noise, low-power analog front-end. IC Role / Device Role / Timing Role: Quad-channel signal conditioner handling limb leads, Wilson central terminal, and right-leg drive simultaneously. Use Value: Four independent amplifiers in one SOIC-14 reduce board area by 60% vs discrete solutions; 130 dB crosstalk prevents lead interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2474IDR | Higher input bias current (6 pA), lower GBW (2.8 MHz), no rail-to-rail output (1.2 V headroom) | Better suited for battery-powered general-purpose amplification where ultra-low leakage is not required | Select when cost sensitivity outweighs femtoamp performance needs; verify output swing margin for ADC interface |
| OPA4340UA | Lower input bias current (0.2 pA), higher quiescent current (750 μA/amplifier), rail-to-rail I/O | Optimized for high-speed precision (<10 μs settling) but consumes >1.8× more supply current | Prefer when faster settling or lower noise (8 nV/√Hz) justifies higher power; confirm thermal derating in SOIC-14 |
Compared with TLV2474IDR and OPA4340UA, LMC660CM/NOPB uniquely balances femtoamp input bias, rail-to-rail output, and 400 μA quiescent current - making it optimal for long-duration, low-power, high-impedance measurement systems where leakage-induced drift must be minimized.
Availability
LMC660CM/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and precision data acquisition systems requiring stable component supply across extended product lifecycles.
Supply support for LMC660CM/NOPB 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 leader specializing in analog and embedded processing technologies, with decades of innovation in precision op amps and low-power signal chain solutions.
LMC660CM/NOPB belongs to TI's LMC66x family of CMOS rail-to-rail op amps, engineered specifically for single-supply, high-impedance, low-drift applications in medical, industrial, and test equipment where input leakage and offset stability are critical.
FAQ
What is the operating temperature range for LMC660CM/NOPB?
The LMC660CM/NOPB is rated for operation from –40°C to +85°C (LMC660AI grade). This industrial temperature range ensures reliable performance in demanding environments such as factory automation controllers and outdoor environmental sensors. The device maintains specified input offset voltage drift (±1.3 μV/°C) and open-loop gain across this full range, supporting designs that require consistent accuracy without active thermal compensation.
Does LMC660CM/NOPB support true rail-to-rail input?
LMC660CM/NOPB does not provide rail-to-rail input common-mode range - its input stage includes V− but only extends to (V+) – 1.9 V at 15 V supply. However, it does offer rail-to-rail output swing, delivering within 150 mV of both rails into 2 kΩ. For applications requiring full rail-to-rail input, consider pairing LMC660CM/NOPB with external level-shifting or selecting an alternative like OPA4340UA, which offers true rail-to-rail input and output.
Can LMC660CM/NOPB drive capacitive loads reliably?
LMC660CM/NOPB can oscillate with capacitive loads >100 pF in unity-gain configuration. Stable operation requires either a 50–100 Ω series resistor at the output plus a 5–10 pF feedback capacitor, or a pullup resistor to V+ conducting ≥500 μA. These techniques restore phase margin above 50° and prevent ringing. Layout best practices - including guard rings and minimized trace capacitance - are essential to maintain stability in high-impedance sensor interfaces.
How does LMC660CM/NOPB compare to LM358 in pin compatibility and performance?
LMC660CM/NOPB is not pin-compatible with LM358 - LM358 is dual (SOIC-8), while LMC660CM/NOPB is quad (SOIC-14). However, the dual variant LMC662 is pin-compatible with LM358. Compared to LM358, LMC660CM/NOPB offers 100× lower input bias current (2 fA vs 45 nA), 10× higher gain bandwidth (1.4 MHz vs 120 kHz), and rail-to-rail output - enabling superior precision and bandwidth in upgraded designs without changing PCB layout for the LMC662 variant.
What is the maximum capacitive load LMC660CM/NOPB can drive without external compensation?
LMC660CM/NOPB can safely drive ≤50 pF capacitive loads in unity-gain follower configuration without external compensation. Beyond this, instability risk increases significantly - especially with resistive loads <500 Ω. For loads >100 pF, TI recommends adding a 50–100 Ω series resistor at the output and a 5–10 pF capacitor from output to inverting input. Uncompensated operation above 50 pF may cause overshoot, ringing, or sustained oscillation, degrading signal fidelity in precision applications.
LMC660CM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMC660CM/NOPB FAQ
1.How can I place an order for LMC660CM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC660CM/NOPB 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 LMC660CM/NOPB reliable?
The price and inventory of LMC660CM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC660CM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC660CM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC660CM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC660CM/NOPB?
LMC660CM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC660CM/NOPB 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 LMC660CM/NOPB?
For technical support, including LMC660CM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC660CM/NOPB requirements.
6.How does Aetrix verify that LMC660CM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC660CM/NOPB 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 LMC660CM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC660CM/NOPB?
All LMC660CM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC660CM/NOPB, 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 LMC660CM/NOPB part is unused and in its original packaging.
Return procedure for LMC660CM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC660CM/NOPB 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
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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