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Texas Instruments LMC660AIM/NOPB
- Part No.:
- LMC660AIM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC660AIM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,246
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Product details
Overview
LMC660AIM/NOPB from Texas Instruments is a quad CMOS operational amplifier optimized for precision, low-leakage, single-supply operation. It delivers rail-to-rail output swing (e.g., 14.63 V at VS = 15 V, RL = 2 kΩ), ultra-low input bias current (2 fA typ.), and high open-loop gain (2000 V/mV into 2 kΩ) - enabling high-impedance sensor buffering and precision current-to-voltage conversion in medical instrumentation and industrial controls.
For engineers reviewing the LMC660AIM/NOPB datasheet, LMC660AIM/NOPB pinout, LMC660AIM/NOPB application, or LMC660AIM/NOPB equivalent, key selection criteria include its 1.1 V/µs slew rate, ±1.3 µV/°C offset drift, 22 nV/√Hz voltage noise, 4.75–15.5 V supply range, and guaranteed performance across –40°C to +85°C ambient temperature.
Technical Context
The LMC660AIM/NOPB uses a proprietary CMOS front-end topology with dual-stage output drive, enabling rail-to-rail swing while maintaining stability into 600 Ω loads. Its input common-mode range extends to V− (ground in single-supply mode), and its ultra-high input resistance (>1 TΩ) minimizes loading on high-impedance sources like pH electrodes or photodiode transimpedance nodes.
Unlike conventional op amps, the LMC660AIM/NOPB features separate sourcing/sinking gain paths - delivering 220 V/mV min open-loop gain while sourcing into 600 Ω at 15 V supply, and retaining >100 V/mV while sinking under same conditions. This asymmetry supports accurate bidirectional signal handling in precision integrators and sample-and-hold circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.75 V to 15.5 V single supply - enables direct interface with 5 V and 12 V systems without level-shifting. |
| Input Bias Current | 2 fA typical - preserves signal integrity in femtoampere-level current sensing (e.g., ion-selective electrodes). |
| Input Offset Voltage | ±3 mV max (AI grade) - ensures <10 µV error in 100× gain stages used in medical front-ends. |
| Slew Rate | 1.1 V/µs - supports stable 10 kHz sine-wave generation and fast settling in peak detectors. |
| Open-Loop Gain | 2000 V/mV into 2 kΩ load - maintains >60 dB loop gain at 100 kHz for precision filter applications. |
| Output Swing | Within 130 mV of rails at 15 V/2 kΩ - maximizes dynamic range in 12-bit+ ADC driver stages. |
| Input Voltage Noise | 22 nV/√Hz at 1 kHz - dominates system noise floor only above ~10 kΩ source impedance. |
Pinout & Package
LMC660AIM/NOPB is housed in a 14-pin SOIC (D package) with exposed pad thermal enhancement. Pin numbering follows standard TI SOIC top-view convention.
| 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 for transimpedance or inverting amplifier configurations; sensitive to stray capacitance. |
| OUT A (Pin 1) | Output, Channel A | Capable of sourcing/sinking ≥22 mA; requires series resistor (50–100 Ω) when driving >100 pF capacitive loads. |
| V+ (Pin 4) | Positive power supply | Accepts up to 15.5 V; must be decoupled with ≥0.1 µF ceramic near pin for stability in high-gain stages. |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input; usable as buffer for reference voltage distribution in multi-channel systems. |
| –IN B (Pin 6) | Inverting input, Channel B | Configurable for differential pair with Channel A; matched offset drift enables chopperless ratiometric designs. |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated from OUT A; supports independent signal conditioning paths without crosstalk (130 dB). |
| OUT C (Pin 8) | Output, Channel C | Validated for simultaneous use with other outputs; no derating required at TA ≤ 85°C and VS ≤ 15 V. |
| –IN C (Pin 9) | Inverting input, Channel C | Compatible with guard ring layout per Figure 6-18; supports low-leakage integrator reset switching. |
| +IN C (Pin 10) | Noninverting input, Channel C | Ground-referenced input option in single-supply mode; common-mode range includes V− (0 V). |
| V– (Pin 11) | Negative power supply | Connected to ground in single-supply operation; must be low-impedance return path for all four channels. |
| +IN D (Pin 12) | Noninverting input, Channel D | Enables 4-channel synchronous sampling; matched input characteristics reduce channel-to-channel gain mismatch. |
| –IN D (Pin 13) | Inverting input, Channel D | Supports parallel feedback networks; input capacitance (typ. 3 pF) sets stability limit with >100 kΩ resistors. |
| OUT D (Pin 14) | Output, Channel D | Full rail-to-rail swing confirmed at 15 V/600 Ω; output short-circuit protected to ±40 mA (non-destructive). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 14.63 Vpp output at 15 V supply into 2 kΩ - eliminates need for dual supplies in portable instrumentation. |
| Ultra-low input bias current | 2 fA typical enables femtoampere-level current measurement without active guarding or Teflon insulation. |
| Specified performance into 600 Ω | Guaranteed 100 V/mV open-loop gain into 600 Ω - supports direct driving of analog multiplexers and ADC input buffers. |
| Low offset voltage drift | ±1.3 µV/°C over –40°C to +85°C - reduces calibration frequency in automotive cabin sensors and industrial PLC modules. |
| High PSRR | 85 dB positive PSRR at 25°C - rejects ripple from shared 5 V/12 V rails in multi-function data acquisition boards. |
| Input common-mode range includes V− | Operates with inputs at 0 V in single-supply mode - simplifies interfacing with ground-referenced thermocouples and strain gauges. |
Applications
| Medical Instrumentation | Precision Current-to-Voltage Conversion |
|---|---|
|
Use Scenario: Amplifying microampere-level currents from electrochemical biosensors in point-of-care blood analyzers. IC Role / Device Role / Timing Role: Front-end transimpedance amplifier with 1 GΩ feedback resistor and guarded input traces. Use Value: 2 fA input bias current prevents baseline drift during 60-second assay integration windows; rail-to-rail output drives 12-bit SAR ADC directly. |
Use Scenario: Converting photodiode current (100 pA–10 µA) to voltage in optical smoke detectors. IC Role / Device Role / Timing Role: Low-noise, high-Z current sink with 22 nV/√Hz input voltage noise and 1.1 V/µs slew rate. Use Value: Enables detection of 0.1% opacity change at 1 kHz modulation frequency without external amplification stage. |
| Long-term Integrator | Sample-and-Hold Circuit |
|
Use Scenario: Accumulating charge from radiation dosimeters over 24-hour periods in nuclear facility monitoring systems. IC Role / Device Role / Timing Role: Ultra-low-leakage integrator core using LMC660AIM/NOPB Channel A with polypropylene hold capacitor. Use Value: ±1.3 µV/°C drift limits integration error to <0.5% over 24 h at 30°C ambient variation; 1 TΩ input resistance prevents capacitor self-discharge. |
Use Scenario: Capturing transient voltage spikes from piezoelectric knock sensors in engine control units. IC Role / Device Role / Timing Role: Unity-gain buffer with 1.1 V/µs slew rate and 130 dB channel isolation for multi-sensor acquisition. Use Value: 14.63 Vpp output swing captures full 0–12 V sensor range; 130 dB crosstalk rejection prevents false triggering from adjacent cylinder signals. |
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 |
|---|---|---|---|
| TLV2464IDR | Higher input bias current (1 pA vs. 2 fA), lower PSRR (70 dB), no guaranteed 600 Ω load spec. | Acceptable for general-purpose 12-bit DAQ but unsuitable for femtoampere current measurement or long-term integrators. | Select TLV2464IDR only when cost sensitivity outweighs leakage and drift requirements. |
| OPA4188AIPW | Zero-drift architecture (0.003 µV/°C), higher supply current (450 µA vs. 400 µA), narrower supply range (4–36 V). | Better for DC-critical applications like weigh scales; less optimal for battery-powered single-supply systems needing rail-to-rail swing at low voltage. | Choose OPA4188AIPW when offset drift dominates system error budget, not input bias or low-voltage operation. |
Compared with TLV2464IDR and OPA4188AIPW, the LMC660AIM/NOPB uniquely balances femtoampere input bias, rail-to-rail swing down to 4.75 V, and verified 600 Ω drive capability - making it irreplaceable in high-impedance, single-supply, wide-temperature medical and industrial sensor interfaces.
Availability
LMC660AIM/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, precision current-to-voltage conversion, long-term integrators, and sample-and-hold circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMC660AIM/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 expertise in precision op amp design and manufacturing.
The LMC660AIM/NOPB belongs to TI's LMC66x family of CMOS rail-to-rail op amps, engineered specifically for high-impedance, low-leakage, single-supply applications in medical, industrial, and automotive sensor signal chains.
FAQ
What is the maximum capacitive load the LMC660AIM/NOPB can drive stably?
The LMC660AIM/NOPB can drive up to 100 pF capacitively without external compensation when configured as a unity-gain follower. For loads exceeding 100 pF, a 50–100 Ω series resistor at the output plus a 5–10 pF feedback capacitor from output to inverting input restores phase margin. This configuration is validated in TI's SNOSC51D datasheet Figure 6-3 and enables stable operation with 1 nF loads in sample-and-hold applications using the LMC660AIM/NOPB.
Does the LMC660AIM/NOPB support true single-supply operation with inputs at ground?
Yes - the LMC660AIM/NOPB input common-mode range explicitly includes V−, allowing inputs to operate at 0 V when V− is grounded. This is confirmed in Section 5.6 of the datasheet, where VCM to negative rail is specified as (V−) – 0.1 V at 25°C. The device maintains rail-to-rail output swing and full 126 dB voltage gain under these conditions, making it suitable for ground-referenced sensor interfaces without level-shifting circuitry.
How does the LMC660AIM/NOPB's input bias current compare to bipolar op amps in precision applications?
The LMC660AIM/NOPB's 2 fA typical input bias current is over six orders of magnitude lower than typical bipolar op amps (e.g., LM324: ~45 nA). This enables direct connection to high-impedance sources like glass pH electrodes (≥100 MΩ) and photodiodes without significant DC error. In a 1 GΩ transimpedance amplifier, the LMC660AIM/NOPB contributes <2 µV of input-offset error versus >45 mV for LM324 - a critical advantage in medical-grade biosensor front-ends.
Is the LMC660AIM/NOPB pin-compatible with the LM358?
No - the LMC660AIM/NOPB is a quad amplifier in 14-pin SOIC, whereas the LM358 is a dual amplifier in 8-pin packages. However, the LMC662 (dual version) is pin-compatible with the LM358 in SOIC-8 and PDIP-8 packages. The LMC660AIM/NOPB shares functional equivalence with LM324 (quad LM358), but differs in pinout: LM324 uses 14-pin SOIC with different channel ordering and power pin locations, so PCB redesign is required for drop-in replacement.
What thermal considerations apply to the LMC660AIM/NOPB in continuous operation?
The LMC660AIM/NOPB has a junction-to-ambient thermal resistance (RθJA) of 115°C/W in SOIC-14 package. At maximum 15.5 V supply and 400 µA per amplifier (1.6 mA total), power dissipation is ~25 mW - resulting in <3°C junction rise above ambient. Derating is only required above 85°C ambient or when driving heavy loads (>20 mA continuously); TI specifies no thermal shutdown mechanism, so sustained operation at TJ ≤ 150°C is permissible per Absolute Maximum Ratings.
LMC660AIM/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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMC660AIM/NOPB FAQ
1.How can I place an order for LMC660AIM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC660AIM/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 LMC660AIM/NOPB reliable?
The price and inventory of LMC660AIM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC660AIM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC660AIM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC660AIM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC660AIM/NOPB?
LMC660AIM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC660AIM/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 LMC660AIM/NOPB?
For technical support, including LMC660AIM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC660AIM/NOPB requirements.
6.How does Aetrix verify that LMC660AIM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC660AIM/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 LMC660AIM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC660AIM/NOPB?
All LMC660AIM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC660AIM/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 LMC660AIM/NOPB part is unused and in its original packaging.
Return procedure for LMC660AIM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC660AIM/NOPB Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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