My Inquiry
My Account
Texas Instruments LPC660AIMX
- Part No.:
- LPC660AIMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LPC660AIMX.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LPC660AIMX from Texas Instruments is a low-power CMOS quad operational amplifier optimized for single-supply operation from +5V to +15V, featuring rail-to-rail output swing, ultra-low input bias current (2 fA), and micropower consumption (160 μA per amplifier). It delivers 120 dB open-loop voltage gain into 100 kΩ loads and supports precision applications including high-impedance buffering and long-term integration.
For engineers reviewing the LPC660AIMX datasheet, LPC660AIMX pinout, LPC660AIMX application, or LPC660AIMX equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SOIC-14 package mapping, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The LPC660AIMX uses a non-conventional topology where the output is taken directly from the integrator stage-enabling rail-to-rail swing without a traditional unity-gain buffer. This architecture incorporates dual feed-forward compensation (Cf and Cff) and a push-pull output stage capable of sourcing/sinking ≥16 mA at V+ = 5V.
Its input common-mode range includes V− (ground in single-supply mode), and it achieves 83 dB CMRR over 0 V ≤ VCM ≤ 12.0 V at V+ = 5V. The amplifier maintains stability driving resistive loads down to 500 Ω and tolerates capacitive loads up to ~100 pF with proper external compensation (e.g., series output resistor + feedback capacitor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.75 V to +15.5 V - supports battery-powered and industrial single-supply systems without level-shifting. |
| Rail-to-Rail Output Swing | Within 10 mV of rails at RL = 100 kΩ - enables full dynamic range utilization in low-voltage data acquisition. |
| Input Bias Current | 2 fA typical - preserves signal integrity in femtoamp-level sensor interfaces (e.g., photodiode transimpedance amps). |
| Quiescent Current | 160 μA per amplifier - allows four-channel precision amplification within 640 μA total supply current. |
| Open-Loop Gain | 1000 V/mV into 100 kΩ - ensures <0.1% gain error in unity-gain buffers with high-Z loads. |
| Slew Rate | 0.11 V/μs - sufficient for ≤1 kHz small-signal precision filtering and sample-and-hold control loops. |
| Input Offset Voltage | 3 mV max - stable over temperature (1.3 μV/°C drift) for DC-coupled instrumentation requiring <10 mV total offset budget. |
Pinout & Package
Package: 14-pin SOIC (D0014A), 1.75 mm max height, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node requiring guard ring layout to preserve sub-pA bias current performance. |
| 2 | Non-Inverting Input (Amplifier A) | Accepts input common-mode voltages down to V− - enables ground-referenced sensor interfacing. |
| 3 | Output (Amplifier A) | Capable of sourcing 16 mA / sinking 16 mA at V+ = 5V - drives 5 kΩ loads while maintaining rail-to-rail swing. |
| 4 | V− (Ground in single-supply) | Reference for all inputs and outputs; must be low-impedance to maintain CMRR >70 dB. |
| 5 | Non-Inverting Input (Amplifier B) | Electrically identical to Pin 2 - supports independent dual-channel configuration without crosstalk degradation (130 dB isolation). |
| 6 | Inverting Input (Amplifier B) | Matches Pin 1 characteristics - allows matched dual-opamp circuits like instrumentation amplifiers (Fig. 38). |
| 7 | Output (Amplifier B) | Same drive strength and swing as Pin 3 - enables simultaneous dual-channel active filtering. |
| 8 | Output (Amplifier C) | Third independent output channel - used in multi-stage precision signal conditioning (e.g., 3-opamp instrumentation amp). |
| 9 | Inverting Input (Amplifier C) | Identical electrical behavior to Pins 1 and 6 - supports cascaded gain stages with minimal inter-channel interaction. |
| 10 | Non-Inverting Input (Amplifier C) | Enables DC-coupled summing or differential configurations with V− referenced common-mode. |
| 11 | V+ | +5V to +15V supply input - requires local 0.1 μF ceramic decoupling adjacent to Pin 11 to suppress high-frequency noise. |
| 12 | Non-Inverting Input (Amplifier D) | Fourth high-Z input - used in quad configurations such as 4-channel sensor signal conditioning or multi-pole filter banks. |
| 13 | Inverting Input (Amplifier D) | Matches all other inverting inputs - supports matched quad active filter topologies (e.g., state-variable filters). |
| 14 | Output (Amplifier D) | Full rail-to-rail output capability - completes quad-channel functionality for applications like 4-channel data acquisition front-ends. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full-scale analog signal processing in single-supply systems (e.g., 0–5 V ADC interfaces) without clipping near supply rails. |
| Ultra-low input bias current (2 fA) | Minimizes voltage error across high-value feedback resistors (>1 GΩ), critical for photodiode and piezoelectric sensor amplification. |
| Micropower operation (160 μA/amplifier) | Supports always-on battery-powered instrumentation with four independent precision channels drawing under 0.65 mW total at 5 V. |
| Specified for 5 kΩ and 100 kΩ loads | Guarantees performance across both high-Z (sensor buffering) and moderate-Z (active filter) applications without redesign. |
| Input common-mode range includes V− | Allows direct connection of ground-referenced sources (e.g., thermocouples, resistive sensors) without level-shifting circuitry. |
| Low distortion (0.01% THD at 1 kHz) | Preserves signal fidelity in audio-grade preamplifiers and precision waveform generation (e.g., sine-wave oscillators, Fig. 39). |
Applications
| Photodiode Current-to-Voltage Conversion | Precision Long-Term Integrator |
|---|---|
|
Use Scenario: Converting weak photocurrents (pA–nA range) from scientific-grade photodiodes into measurable voltage signals under low-light conditions. 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: Achieves sub-pA input leakage error due to 2 fA bias current, enabling accurate low-light photon counting without guard-ring layout compromises. |
Use Scenario: Accumulating charge from low-leakage capacitors over hours/days in energy harvesting or radiation dosimetry systems. IC Role / Device Role / Timing Role: Integrator core with <3 mV input offset and 1.3 μV/°C drift to minimize integration drift error. Use Value: Limits integration error to <1 mV/hour at 25°C, supporting stable long-duration analog accumulation without periodic reset. |
| High-Impedance Preamplifier for Piezoelectric Sensors | Single-Supply Instrumentation Amplifier Front-End |
|
Use Scenario: Amplifying high-output-impedance signals (≥100 MΩ) from accelerometers and acoustic emission sensors in structural health monitoring. IC Role / Device Role / Timing Role: First-stage buffer with >1 TΩ input resistance and rail-to-rail swing to preserve signal amplitude before further conditioning. Use Value: Prevents signal attenuation and phase shift caused by RC time constants, ensuring faithful reproduction of transient mechanical events. |
Use Scenario: Building 3-opamp instrumentation amplifiers for medical ECG or industrial strain gauge bridges operating from a single 5 V supply. IC Role / Device Role / Timing Role: Dual-amplifier section (Pins 1–7) forms difference amplifier and gain stage; fourth amplifier serves as reference buffer. Use Value: Enables >80 dB CMRR over temperature using matched external resistors, meeting IEC 60601-2-27 ECG accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC660IMX/NOPB | Same CMOS process, identical pinout, but higher input offset voltage (6.3 mV max vs. 3 mV) and lower slew rate (0.07 V/μs). | Less suitable for DC-critical integrators or low-distortion audio preamps where LPC660AIMX's 0.01% THD and tighter VOS matter. | Select LPC660AIMX when <3 mV offset and 0.11 V/μs slew are required; LMC660IMX suffices for general-purpose low-power buffering. |
| TLC27L4CDR | Lower quiescent current (110 μA/amplifier), but no rail-to-rail output (swing limited to V+ −1.5 V) and higher input bias current (20 pA). | Cannot drive full-scale into ADCs near V+; unsuitable for photodiode amps requiring sub-pA bias current. | Choose TLC27L4CDR only for ultra-low-power battery applications where rail-to-rail swing and femtoamp bias are not needed. |
Compared with LMC660IMX/NOPB and TLC27L4CDR, the LPC660AIMX uniquely combines rail-to-rail output, 2 fA input bias, and 3 mV VOS in a single SOIC-14 package-making it the only option among the three for precision single-supply integrators and femtoamp transimpedance designs.
Availability
LPC660AIMX is available at Aetrix Electronics and suitable for precision sensor signal conditioning, battery-powered instrumentation, and single-supply analog front-ends requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for LPC660AIMX 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 LPC660AIMX belongs to TI's legacy low-power CMOS op amp family, engineered specifically for single-supply, high-impedance, micropower applications in test equipment, medical devices, and environmental sensing systems.
FAQ
What is the maximum capacitive load the LPC660AIMX can drive without external compensation?
The LPC660AIMX may oscillate when driving capacitive loads near the threshold for instability, especially in unity-gain follower configurations. While exact tolerance depends on gain and layout, typical uncompensated operation is reliable up to ~20 pF. For larger loads (e.g., >50 pF), TI recommends adding a 50–100 Ω series resistor at the output and a 5–10 pF feedback capacitor from inverting input to output-verified in Figure 26 of the LPC660AIMX datasheet.
Does the LPC660AIMX support true rail-to-rail input common-mode range?
No-the LPC660AIMX features rail-to-rail *output* swing, but its input common-mode range extends only to V− (ground) and up to V+ − 2.3 V at 25°C. As specified in the DC Electrical Characteristics table, the upper limit is V+ − 2.6 V at temperature extremes. Therefore, it does not accept inputs at V+, limiting use in certain level-shifting or true R-R input applications.
Can the LPC660AIMX be used in dual-supply configurations?
Yes-the LPC660AIMX operates with split supplies (e.g., ±7.5 V) as confirmed in Absolute Maximum Ratings and Typical Performance Characteristics (Figures 2–17). Its input common-mode range includes V−, and negative supply rejection ratio is specified at 94 dB (min) for V− between 0 V and −10 V, making it suitable for bipolar signal conditioning where ground-referenced inputs are required.
What is the thermal resistance (θJA) for the LPC660AIMX in SOIC-14 package?
The LPC660AIMX in 14-pin SOIC (D0014A) package has a thermal resistance θJA of 115°C/W, as documented in the Operating Ratings table. This value assumes standard JEDEC 2-layer board mounting; actual junction temperature rise must be calculated as TJ = TA + (PD × θJA), where PD is power dissipation derived from supply current and output loading.
Is the LPC660AIMX pin-compatible with the LPC662 dual or LPC661 single variants?
No-while the LPC660AIMX (quad), LPC662 (dual), and LPC661 (single) share identical electrical specifications and CMOS process technology, they use different packages: LPC660AIMX is SOIC-14, LPC662 is SOIC-8, and LPC661 is SOIC-8. There is no pin-to-pin compatibility; PCB layout must be redesigned when substituting between these variants.
LPC660AIMX 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
LPC660AIMX FAQ
1.How can I place an order for LPC660AIMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC660AIMX 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 LPC660AIMX reliable?
The price and inventory of LPC660AIMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC660AIMX is usually 5 days.
3.What payment methods are accepted for LPC660AIMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC660AIMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC660AIMX?
LPC660AIMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC660AIMX 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 LPC660AIMX?
For technical support, including LPC660AIMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC660AIMX requirements.
6.How does Aetrix verify that LPC660AIMX is sourced from the original manufacturer or authorized distributors?
All LPC660AIMX 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 LPC660AIMX meets industry standards.
7.What is the process for return or replacement of LPC660AIMX?
All LPC660AIMX units undergo pre-shipment inspection (PSI). If there is an issue with LPC660AIMX, 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 LPC660AIMX part is unused and in its original packaging.
Return procedure for LPC660AIMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC660AIMX 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
