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Texas Instruments LPC660IMX
- Part No.:
- LPC660IMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LPC660IMX.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
LPC660IMX from Texas Instruments is a low-power CMOS quad operational amplifier optimized for single-supply operation across +5V to +15V rails. It delivers rail-to-rail output swing, ultra-low input bias current (2 fA), 120 dB open-loop gain, and 0.11 V/μs slew rate - enabling precision signal conditioning in high-impedance sensor interfaces and micropower instrumentation.
For engineers reviewing the LPC660IMX datasheet, LPC660IMX pinout, LPC660IMX application, or LPC660IMX equivalent, this page provides verified specifications, SOIC-14 package details, real-world application contexts, and validated alternative options for low-drift, low-power op-amp selection in battery-powered and high-accuracy analog systems.
Technical Context
The LPC660IMX uses a compound integrator-based output stage without a traditional unity-gain buffer, enabling true rail-to-rail swing while maintaining stability into 5 kΩ loads. Its topology includes dual feed-forward compensation (Cf and Cff) and a push-pull output stage capable of sourcing/sinking up to 22 mA at +5V.
Input common-mode range extends to V− (ground), supporting single-supply configurations with inputs referenced to ground. The device achieves 1.3 μV/°C offset drift and 42 nV/√Hz input voltage noise at 1 kHz - performance metrics confirmed across temperature extremes (−40°C to +85°C) per its Industrial-grade qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.75V to +15.5V - supports wide single-supply operation including 5V and 12V systems. |
| Rail-to-Rail Output Swing | Within 40 mV of rails at 5 kΩ load (V+ = 5V) - enables full dynamic range utilization in low-voltage data acquisition. |
| Input Bias Current | 2 fA typical - preserves signal integrity in photodiode, piezoelectric, and electrophysiological sensor front-ends. |
| Open-Loop Gain | 120 dB into 100 kΩ - ensures <0.01% gain error in precision amplification stages with moderate feedback resistors. |
| Slew Rate | 0.11 V/μs - sufficient for 1 kHz sine-wave generation and low-frequency active filtering without distortion. |
| Input Offset Voltage | 3 mV max - stable over temperature with 1.3 μV/°C drift, minimizing calibration burden in long-term integrators. |
| Total Harmonic Distortion | 0.01% at 1 kHz - meets audio-grade and precision measurement requirements for clean signal reproduction. |
Pinout & Package
Package: 14-pin SOIC (D0014A), 1.75 mm max height, RoHS-compliant, SN lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node requiring guard ring layout; accepts signals down to V− (ground). |
| 2 | Non-Inverting Input (Amplifier A) | Same high-Z characteristics as Pin 1; critical for low-leakage transimpedance configurations. |
| 3 | Output (Amplifier A) | Rail-to-rail capable output; drives capacitive loads up to ~100 pF with series resistor compensation. |
| 4 | V− (Ground/–VS) | Power supply return; also serves as reference for input common-mode range extension to V−. |
| 5 | Non-Inverting Input (Amplifier B) | Independent high-Z input; shares same ultra-low bias current spec as Pins 1 and 2. |
| 6 | Inverting Input (Amplifier B) | Matched input characteristics to Pin 1; usable in differential or instrumentation topologies. |
| 7 | Output (Amplifier B) | Identical output drive capability to Pin 3; supports independent channel operation in multi-stage filters. |
| 8 | Output (Amplifier C) | Third independent output; enables 3-channel signal processing or cascaded gain stages without external buffering. |
| 9 | Inverting Input (Amplifier C) | Full 14-pin symmetry confirms standard quad op-amp pinout alignment per SOIC-14 convention. |
| 10 | Non-Inverting Input (Amplifier C) | Matches electrical specs of Pins 1–2; suitable for parallel-input configurations like averaging networks. |
| 11 | V+ | Positive supply rail; operates up to +15.5V; output short-circuit protection applies above +13V. |
| 12 | Non-Inverting Input (Amplifier D) | Fourth high-Z input; enables simultaneous monitoring of four independent sensor channels. |
| 13 | Inverting Input (Amplifier D) | Final input terminal; fully specified for 2 fA bias current and −0.1 V to V+−2.3 V common-mode range. |
| 14 | Output (Amplifier D) | Fourth rail-to-rail output; supports independent sample-and-hold or peak-detection functions per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full-scale signal utilization in single-supply systems without level-shifting circuitry. |
| 2 fA input bias current | Reduces input leakage errors by >100× vs. standard CMOS op-amps, critical for picoamp-level current sensing. |
| 1.3 μV/°C offset drift | Minimizes thermal-induced baseline shift in long-duration integrators and precision DC amplifiers. |
| 0.01% THD at 1 kHz | Supports high-fidelity signal reconstruction in active filters and audio preamplifier stages. |
| Specified for 5 kΩ and 100 kΩ loads | Guarantees performance across both high-Z sensor buffers and moderate-Z active filter implementations. |
Applications
| Photodiode Current-to-Voltage Conversion | Precision Long-Term Integration |
|---|---|
|
Use Scenario: Converting weak photocurrents (pA–nA) from scientific or medical photodiodes into measurable voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and rail-to-rail output to maximize dynamic range. Use Value: 2 fA bias current prevents signal corruption; rail-to-rail swing preserves full 0–5V ADC input range under varying light conditions. |
Use Scenario: Accumulating charge from low-leakage sources (e.g., radiation detectors, electrochemical sensors) over hours or days. IC Role / Device Role / Timing Role: Integrator core with sub-mV offset drift ensuring minimal baseline walkover time. Use Value: 1.3 μV/°C drift limits integration error to <10 μV/hour at ±5°C ambient variation - enabling reliable nanocoulomb-level charge measurement. |
| High-Impedance Sensor Buffering | Single-Supply Active Filtering |
|
Use Scenario: Isolating high-output-impedance pH electrodes, piezoresistive strain gauges, or MEMS accelerometers from downstream circuitry. IC Role / Device Role / Timing Role: Unity-gain buffer with input common-mode range extending to ground and V+. Use Value: Rail-to-rail input/output allows direct interfacing with 0–3.3V or 0–5V ADCs without external level-shifting components. |
Use Scenario: Implementing 10 Hz bandpass or low-pass filters in portable gas analyzers or wearable biometric monitors. IC Role / Device Role / Timing Role: Quad amplifier enabling cascaded 2nd-order sections with independent gain control per stage. Use Value: 0.01% THD and 0.11 V/μs slew rate ensure accurate frequency response up to 1 kHz without harmonic distortion artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC660CMX/NOPB | Lower supply current (100 μA vs. 160 μA), identical 2 fA bias current and rail-to-rail output, but reduced gain-bandwidth (0.3 MHz vs. 0.35 MHz). | Better suited for ultra-low-power battery applications where bandwidth <300 kHz is acceptable. | Select LMC660CMX/NOPB when minimizing quiescent current is prioritized over marginal gain-bandwidth margin. |
| TLC27L4CDR | Higher input offset voltage (10 mV max), higher bias current (0.6 pA), no rail-to-rail output - swings within 1.5V of rails. | Acceptable for cost-sensitive industrial controls where precision is secondary to price and availability. | Choose TLC27L4CDR only if system tolerances allow ≥10× higher offset and 300× higher bias current than LPC660IMX. |
Compared with LMC660CMX/NOPB and TLC27L4CDR, the LPC660IMX offers superior offset drift (1.3 μV/°C vs. 2.5 μV/°C and 10 μV/°C), tighter offset voltage (3 mV vs. 5 mV and 10 mV), and guaranteed rail-to-rail output - making it the preferred choice for high-accuracy, low-drift, single-supply analog signal chains.
Availability
LPC660IMX is available at Aetrix Electronics and suitable for photodiode signal conditioning, precision long-term integration, and high-impedance sensor buffering requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for LPC660IMX 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 LPC660IMX belongs to TI's legacy low-power CMOS op-amp family, engineered specifically for single-supply, high-impedance, micropower applications in instrumentation, medical devices, and environmental monitoring systems.
FAQ
What is the operating temperature range for the LPC660IMX?
The LPC660IMX is rated for industrial operation from −40°C to +85°C. This range is explicitly defined in the Operating Ratings table of the SNOS554D datasheet and applies to all electrical specifications unless otherwise noted. The device maintains its 2 fA input bias current, 3 mV max offset voltage, and rail-to-rail output performance across this full temperature span - making LPC660IMX suitable for deployment in uncontrolled environments such as field-deployed sensors and industrial controllers.
Does the LPC660IMX support true rail-to-rail input operation?
No, the LPC660IMX does not support rail-to-rail input. Its input common-mode voltage range extends to V− (ground) and up to V+ − 2.3 V, as confirmed in the DC Electrical Characteristics table. While this allows ground-referenced inputs on single supplies, it does not accommodate signals near V+. The rail-to-rail capability applies exclusively to the output stage - a key distinction clearly documented in the "Features" and "Electrical Characteristics" sections of the LPC660IMX datasheet.
Can the LPC660IMX drive capacitive loads reliably?
The LPC660IMX can drive capacitive loads up to ~100 pF stably in unity-gain follower configuration when compensated with a 50–100 Ω series resistor at the output and a 5–10 pF capacitor from inverting input to output. Without compensation, oscillation may occur near the threshold capacitance - a behavior documented in Figures 23–24 and Application Hints. This limitation is inherent to its integrator-based topology and must be addressed in PCB layout for high-CL applications like piezoelectric sensor interfaces.
What is the maximum safe supply voltage for the LPC660IMX?
The absolute maximum supply voltage for the LPC660IMX is 16 V, but continuous operation above +13 V requires caution: the datasheet explicitly warns that connecting the output to V+ when V+ exceeds 13 V may adversely affect reliability. For robust long-term operation, the recommended maximum is +15.5 V (per Operating Ratings), with derating advised above +13 V to prevent accelerated aging of the output stage - a constraint directly tied to the internal push-pull architecture of LPC660IMX.
How does the LPC660IMX differ from the LPC660AIMX variant?
The LPC660IMX and LPC660AIMX share identical electrical specifications, pinout, and SOIC-14 packaging, but differ in temperature grade: LPC660IMX is rated for −40°C to +85°C (Industrial), while LPC660AIMX is rated for −55°C to +125°C (Military/Extended). Both carry the same "I" or "AI" suffix in marking (LPC660IM vs. LPC660AIM), and both are manufactured using TI's Double-Poly Silicon-Gate CMOS process - meaning LPC660IMX is not a lower-spec version, but a distinct qualification grade optimized for commercial/industrial use cases.
LPC660IMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 0.11V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.002 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 160µA (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
LPC660IMX FAQ
1.How can I place an order for LPC660IMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC660IMX 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 LPC660IMX reliable?
The price and inventory of LPC660IMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC660IMX is usually 5 days.
3.What payment methods are accepted for LPC660IMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC660IMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC660IMX?
LPC660IMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC660IMX 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 LPC660IMX?
For technical support, including LPC660IMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC660IMX requirements.
6.How does Aetrix verify that LPC660IMX is sourced from the original manufacturer or authorized distributors?
All LPC660IMX 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 LPC660IMX meets industry standards.
7.What is the process for return or replacement of LPC660IMX?
All LPC660IMX units undergo pre-shipment inspection (PSI). If there is an issue with LPC660IMX, 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 LPC660IMX part is unused and in its original packaging.
Return procedure for LPC660IMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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