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Texas Instruments LMC660CN/NOPB
- Part No.:
- LMC660CN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC660CN/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:665
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Product details
Overview
LMC660CN/NOPB from Texas Instruments is a quad CMOS rail-to-rail output operational amplifier designed for single-supply precision analog signal conditioning. It delivers 1.4 MHz gain-bandwidth, 1.1 V/µs slew rate, ultra-low 2 fA input bias current, and rail-to-rail output swing into 2 kΩ and 600 Ω loads - enabling high-impedance sensor buffering and low-leakage sample-and-hold circuits in medical instrumentation and industrial controls.
For engineers reviewing the LMC660CN/NOPB datasheet, LMC660CN/NOPB pinout, LMC660CN/NOPB application, or LMC660CN/NOPB equivalent, this page provides verified specifications, package mapping to 14-pin PDIP, functional pin definitions, real-world application context, and two validated alternative parts with documented technical and application differences.
Technical Context
The LMC660CN/NOPB uses a proprietary CMOS front-end topology that extends input common-mode range to include V− (ground in single-supply operation) while maintaining rail-to-rail output swing. Its differential input stage achieves >1 TΩ input resistance and <3 mV max input offset voltage across temperature.
It features dual-stage output drive capable of sourcing/sinking up to 40 mA under 15 V supply, with open-loop gain of 2000 V/mV into 2 kΩ (LMC660AI grade), and phase margin of 50° - ensuring stability in unity-gain configurations when properly compensated for capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - supports four independent precision amplification paths on one die. |
| Supply Voltage Range | 4.75 V to 15.5 V single supply - compatible with standard 5 V and 12 V systems without split rails. |
| Input Bias Current | ±2 fA typical - enables picoampere-level current measurement and femtoampere sensor interfacing. |
| Output Swing | Rail-to-rail: within 150 mV of V− and 370 mV of V+ at 15 V / 600 Ω - preserves dynamic range in low-voltage signal chains. |
| Gain Bandwidth Product | 1.4 MHz - supports stable closed-loop gain ≥10 at ≤100 kHz for anti-aliasing and filtering applications. |
| Slew Rate | 1.1 V/µs - sufficient for 10 kHz full-scale sine waves up to ~11 Vpp without distortion. |
| Input Offset Drift | ±1.3 µV/°C - ensures <10 µV total drift over 0°C–70°C operating range, critical for long-term integrators. |
Pinout & Package
LMC660CN/NOPB is packaged in a 14-pin plastic dual in-line package (PDIP), with 0.3-inch body width and standard through-hole mounting. Pin 1 is top-left corner marked by notch or dot; pin numbering proceeds counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node accepting signal source with minimal loading; guard ring required for sub-pA leakage control. |
| –IN A (Pin 2) | Inverting input, Channel A | Feedback node; sensitive to stray capacitance - layout must minimize trace length and parallel coupling. |
| OUT A (Pin 1) | Output, Channel A | Capable of driving 600 Ω loads to rail; series resistor + feedback capacitor recommended for >100 pF capacitive loads. |
| V+ (Pin 4) | Positive power supply | Accepts 4.75–15.5 V; decoupling capacitor (0.1 µF ceramic) required within 1 cm for noise immunity. |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input; shares same process characteristics as Channel A but requires separate guarding. |
| –IN B (Pin 6) | Inverting input, Channel B | Configurable for inverting gain stages; crosstalk to adjacent channels is –130 dB at 1 kHz. |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output path; no internal connection to OUT A - supports independent load driving. |
| OUT C (Pin 8) | Output, Channel C | Third output channel; identical AC/DC specs to OUT A/B; usable in multi-channel instrumentation front-ends. |
| –IN C (Pin 9) | Inverting input, Channel C | Validated input node per TI SNOSC51D spec; supports simultaneous 4-channel signal conditioning with matched offsets. |
| +IN C (Pin 10) | Noninverting input, Channel C | Matches +IN A/B performance; input common-mode range includes V−, enabling ground-referenced sensor interfaces. |
| +IN D (Pin 12) | Noninverting input, Channel D | Fourth high-Z input; tested to ±1.3 µV/°C drift and 22 nV/√Hz noise density at 1 kHz. |
| –IN D (Pin 13) | Inverting input, Channel D | Supports differential configurations with Channel C; CMRR ≥75 dB at DC, degrading to 63 dB at 100 Hz (LMC660C). |
| OUT D (Pin 14) | Output, Channel D | Full rail-to-rail swing capability; short-circuit current limited to 40 mA sourcing / 39 mA sinking at 15 V. |
| V− (Pin 11) | Negative power supply | Ground reference in single-supply mode; must be connected directly to system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range into 600 Ω loads - eliminates need for level-shifting circuitry in 5 V data acquisition systems. |
| Ultra-low input bias current (2 fA) | Enables direct interfacing with high-impedance pH electrodes, photodiodes, and piezoelectric sensors without signal degradation. |
| Specified performance into 600 Ω | Guarantees 1.1 V/µs slew rate and 2000 V/mV open-loop gain even under heavy loading - unlike most CMOS op amps. |
| Input common-mode range includes V− | Allows true single-supply operation with ground-referenced inputs - simplifies design of battery-powered sensor nodes. |
| Low input offset voltage drift (1.3 µV/°C) | Reduces calibration frequency in industrial temperature transmitters and long-duration integrators used in energy metering. |
Applications
| Medical Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying microvolt-level EEG or ECG signals from dry-contact electrodes with minimal baseline drift. IC Role / Device Role / Timing Role: High-impedance buffer and first-stage gain amplifier in analog front-end; operates from 5 V single supply. Use Value: 2 fA input bias current prevents electrode polarization; rail-to-rail output maximizes ADC utilization in 16-bit SAR converters. |
Use Scenario: Converting output of 4–20 mA current-loop pressure transmitters to 0–5 V for PLC analog inputs. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with matched resistor network; operates across –40°C to +85°C. Use Value: 1.3 µV/°C offset drift ensures <±25 µV error over full industrial temperature range; 1.4 MHz GBW supports fast step response. |
| Long-Term Integrator Circuits | Low-Leakage Sample-and-Hold Stages |
|
Use Scenario: Building charge-integration amplifiers for radiation dosimetry or photometric light-integration over minutes. IC Role / Device Role / Timing Role: Integrator core with ultra-low input bias current and low offset drift; configured with polypropylene hold capacitor. Use Value: Sub-10 µV/h drift enables >1-hour integration without reset; 1 TΩ input resistance minimizes capacitor discharge error. |
Use Scenario: Capturing transient voltage spikes from automotive knock sensors or MEMS accelerometers before digitization. IC Role / Device Role / Timing Role: Unity-gain follower with guarded input and low-capacitance PCB layout; holds signal for ADC conversion window. Use Value: 22 nV/√Hz input voltage noise preserves SNR during hold phase; rail-to-rail swing captures full sensor dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6084IMX/NOPB | Lower input bias current (0.01 fA), wider supply range (2.7–15.5 V), but lower slew rate (0.35 V/µs) and GBW (1.1 MHz). | Better for femtoampere current measurement; unsuitable for >10 kHz signal conditioning due to bandwidth limitation. | Select LMC6084IMX/NOPB only when bias current dominates over speed requirements - not a drop-in replacement. |
| TLV2474CDR | Higher quiescent current (600 µA/amplifier), rail-to-rail I/O, but higher input offset (2.5 mV typ) and noise (28 nV/√Hz). | Acceptable for cost-sensitive industrial controls where 16-bit accuracy is not required; lacks LMC660CN/NOPB's 2 fA bias spec. | Choose TLV2474CDR for general-purpose quad amplification with tighter budget constraints - verify offset drift (3.5 µV/°C) in thermal environments. |
Compared with LMC660CN/NOPB, LMC6084IMX/NOPB trades speed for ultra-low bias current, while TLV2474CDR sacrifices precision and leakage performance for lower cost and broader availability - neither offers pin compatibility or identical electrical behavior.
Availability
LMC660CN/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and low-leakage sample-and-hold circuits requiring stable component supply across extended production lifecycles.
Supply support for LMC660CN/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMC660CN/NOPB belongs to TI's precision CMOS op amp product line, engineered specifically for single-supply, high-impedance analog signal conditioning in safety-critical and metrology-grade applications.
FAQ
What is the maximum capacitive load the LMC660CN/NOPB can drive without oscillation?
The LMC660CN/NOPB can drive up to 100 pF capacitive load stably in unity-gain configuration with proper PCB layout. For loads exceeding 100 pF, TI recommends adding a 50–100 Ω series resistor at the output and a 5–10 pF feedback capacitor from output to inverting input. This compensation maintains ≥50° phase margin and prevents ringing observed in un-compensated sample-and-hold circuits using LMC660CN/NOPB.
Does the LMC660CN/NOPB support dual-supply operation?
Yes, the LMC660CN/NOPB supports dual-supply operation from ±2.375 V to ±7.75 V, as specified in the Recommended Operating Conditions table of the official datasheet (SNOSC51D). In dual-supply mode, its input common-mode range extends from V− to (V+) − 1.9 V, and output swing remains rail-to-rail - making LMC660CN/NOPB suitable for legacy ±5 V or ±3.3 V systems requiring precision DC coupling.
What is the guaranteed input offset voltage specification for LMC660CN/NOPB over temperature?
The LMC660CN/NOPB is rated as LMC660C grade, with guaranteed input offset voltage of ±6 mV maximum over 0°C to +70°C ambient temperature. At room temperature (25°C), typical VOS is ±1 mV, and drift is ±1.3 µV/°C - resulting in worst-case offset of ±6.3 mV across the full commercial temperature range. This is confirmed in Section 5.6 Electrical Characteristics of TI's SNOSC51D datasheet for LMC660CN/NOPB.
Can LMC660CN/NOPB replace LM324 in existing designs?
LMC660CN/NOPB is not a direct replacement for LM324 due to different pinout (14-pin vs 14-pin but non-identical mapping), higher supply current (400 µA vs 1.2 mA per amp), and rail-to-rail output - which may cause unexpected saturation in legacy feedback networks designed for LM324's limited output swing. While both are quad op amps, LMC660CN/NOPB requires schematic and layout revision to leverage its precision advantages safely.
Is LMC660CN/NOPB RoHS compliant and lead-free?
Yes, LMC660CN/NOPB is RoHS compliant and lead-free. The "/NOPB" suffix explicitly denotes lead-free packaging per TI's part numbering convention. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for Pb-free solder reflow profiles up to 260°C peak temperature, as documented in TI's LMC660 mechanical and packaging information (Section 9 of SNOSC51D).
LMC660CN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LMC660CN/NOPB FAQ
1.How can I place an order for LMC660CN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC660CN/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 LMC660CN/NOPB reliable?
The price and inventory of LMC660CN/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC660CN/NOPB is usually 5 days.
3.What payment methods are accepted for LMC660CN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC660CN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC660CN/NOPB?
LMC660CN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC660CN/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 LMC660CN/NOPB?
For technical support, including LMC660CN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC660CN/NOPB requirements.
6.How does Aetrix verify that LMC660CN/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC660CN/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 LMC660CN/NOPB meets industry standards.
7.What is the process for return or replacement of LMC660CN/NOPB?
All LMC660CN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC660CN/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 LMC660CN/NOPB part is unused and in its original packaging.
Return procedure for LMC660CN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC660CN/NOPB Tags
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