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Texas Instruments LPC660IMX/NOPB
- Part No.:
- LPC660IMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LPC660IMX/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,462
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Product details
Overview
LPC660IMX/NOPB from Texas Instruments is a low-power CMOS quad operational amplifier optimized for single-supply operation from +5 V to +15 V, featuring rail-to-rail output swing, 2 fA input bias current, and 3 mV input offset voltage - enabling high-impedance buffering and precision current-to-voltage conversion in battery-powered sensor interfaces.
For engineers reviewing the LPC660IMX/NOPB datasheet, LPC660IMX/NOPB pinout, LPC660IMX/NOPB application, or LPC660IMX/NOPB equivalent, this device supports micropower (<1 mW) operation with ultra-low input bias current, specified performance into 5 kΩ and 100 kΩ loads, and full industrial temperature range (−40°C to +85°C) in SOIC-14 packaging.
Technical Context
The LPC660IMX/NOPB employs a compound integrator-based output stage without a traditional unity-gain buffer, enabling rail-to-rail output swing while maintaining stability into 500 Ω resistive loads. Its topology includes dual feed-forward compensation (Cf and Cff) and a push-pull output stage to handle sourcing and sinking demands asymmetrically.
Input common-mode range extends to V− (ground), supporting true single-supply signal conditioning. The amplifier delivers 120 dB open-loop gain into 100 kΩ, 0.11 V/μs slew rate, and 0.01% THD at 1 kHz - all while consuming only 160 μA per amplifier under typical conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.75 V to +15.5 V - enables direct use with standard 5 V and 12 V rails without regulation. |
| Input Bias Current | 2 fA typical - preserves signal integrity in picoampere-level photodiode and electrochemical sensor front-ends. |
| Rail-to-Rail Output | Swings within 40 mV of V+ and 60 mV of V− at 5 kΩ load - maximizes dynamic range in single-supply data acquisition. |
| Input Offset Voltage | 3 mV max - ensures ≤0.3% error in 1 V full-scale precision current-to-voltage conversion. |
| Slew Rate | 0.11 V/μs - supports stable 10 Hz–1 kHz active filtering and sample-and-hold settling without overshoot. |
| Quiescent Current | 160 μA per amplifier - enables four-channel amplification at <650 μW total power, critical for energy harvesting systems. |
| CMRR | 70 dB min (0 V ≤ VCM ≤ 12 V) - maintains accuracy when rejecting ground-referenced noise in mixed-signal PCB layouts. |
Pinout & Package
Package: 14-pin SOIC (D0014A), 3.9 mm × 8.75 mm body, 1.27 mm pitch, 1.75 mm max height, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | High-impedance node (≥1 TΩ) for feedback network connection; guard ring routing required for sub-pA leakage. |
| 2 | Non-Inverting Input A | Accepts signals down to V− (ground); requires guard ring and air-wire layout for ultra-low bias current preservation. |
| 3 | Output A | Push-pull rail-to-rail driver capable of ±16 mA sink/source into 5 kΩ; series resistor needed for >100 pF capacitive loads. |
| 4 | V− (Ground) | Reference for single-supply operation; must be low-impedance and decoupled with 0.1 μF ceramic near pin. |
| 5 | Non-Inverting Input B | Independent high-Z input for second channel; shares same layout rules as Pin 2 for leakage control. |
| 6 | Inverting Input B | Feedback node for Channel B; isolation from adjacent traces prevents crosstalk (>130 dB amp-to-amp isolation). |
| 7 | Output B | Matched performance to Pin 3; supports independent buffering or dual-channel instrumentation amplifier topologies. |
| 8 | Output C | Third rail-to-rail output; usable for active filter stages or reference voltage followers with matched DC specs. |
| 9 | Inverting Input C | Channel C feedback terminal; layout symmetry with Pins 1 and 6 minimizes thermal EMF-induced offset drift. |
| 10 | Non-Inverting Input C | DC-coupled input for third channel; common-mode range includes V−, enabling ground-referenced sensor interfacing. |
| 11 | V+ | Positive supply rail; requires local 0.1 μF + 10 μF decoupling; avoid >13 V to prevent reliability degradation. |
| 12 | Non-Inverting Input D | Fourth high-Z input; suitable for biasing, reference generation, or auxiliary signal conditioning in multi-channel systems. |
| 13 | Inverting Input D | Final feedback node; pin-to-pin compatible with LPC660AIMX/NOPB for drop-in replacement in existing SOIC-14 layouts. |
| 14 | Output D | Fourth rail-to-rail output; supports simultaneous 4-channel signal processing in compact space-constrained designs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full supply voltage utilization - e.g., 0.04 V to 4.96 V on 5 V rail - eliminating level-shifting circuitry in portable data loggers. |
| 2 fA input bias current | Enables femtoampere-level current measurement in photodiode preamps and ion-selective electrode circuits without guard-driven op-amp buffers. |
| 120 dB open-loop gain | Ensures ≤0.005% gain error in precision transimpedance amplifiers with 1 MΩ feedback resistors at DC and low frequencies. |
| 0.01% THD at 1 kHz | Supports high-fidelity analog signal conditioning in audio-grade sensor interfaces and medical instrumentation front-ends. |
| −40°C to +85°C operation | Validated performance across industrial ambient temperatures - no derating required up to 85°C with θJA = 115°C/W in SOIC-14. |
Applications
| Photodiode Current-to-Voltage Converter | Precision Long-Term Integrator |
|---|---|
|
Use Scenario: Converting weak photocurrents (pA–nA) from scientific-grade photodiodes into measurable voltage signals under low-light conditions. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with ultra-low input bias current preserving signal integrity and minimizing dark-current-induced offset. Use Value: Achieves sub-100 pA resolution without external guard drivers, reducing component count and board area by 40% versus bipolar alternatives. |
Use Scenario: Accumulating charge over hours/days in radiation dosimetry or electrochemical coulometric analysis. IC Role / Device Role / Timing Role: Integrator core with <3 mV offset and <1.3 μV/°C drift ensuring <0.5% integration error over 24-hour periods at 25°C. Use Value: Eliminates periodic auto-zero calibration circuitry, simplifying system firmware and improving long-term measurement repeatability. |
| High-Impedance Preamplifier for pH Electrodes | Single-Supply Active Filter (10 Hz Bandpass) |
|
Use Scenario: Amplifying mV-level signals from glass pH electrodes with >100 MΩ source impedance in portable water quality analyzers. IC Role / Device Role / Timing Role: First-stage buffer isolating high-Z electrode from downstream circuitry while rejecting common-mode noise via 70 dB CMRR. Use Value: Maintains electrode polarization stability and avoids measurement drift caused by input leakage currents >1 pA. |
Use Scenario: Extracting biopotential signals (e.g., ECG baseline wander) in wearable health monitors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Dual-amplifier 2nd-order bandpass section with rail-to-rail output swing maximizing SNR in 0–5 V ADC input range. Use Value: Delivers −8.8× gain and Q = 2.1 at 10 Hz using only passive RC components - no external trim pots or calibration needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad CMOS operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC662IMX/NOPB | Dual-channel version; identical 2 fA bias current and rail-to-rail output but only two amplifiers per package. | Requires two ICs for four-channel designs, increasing board area and BOM count by 100%. | Select when dual-channel functionality suffices and layout space permits separate devices. |
| TLC27L4CDR | Higher input offset (10 mV max), higher bias current (0.6 pA), lower slew rate (0.03 V/μs), but wider supply range (3–16 V). | Not suitable for pA-level current sensing or precision integrators requiring <5 mV offset. | Choose only for cost-sensitive, non-precision applications where 10 mV offset and 0.6 pA bias are acceptable. |
Compared with LMC662IMX/NOPB and TLC27L4CDR, the LPC660IMX/NOPB uniquely delivers quad-channel rail-to-rail operation with femtoampere input bias and 3 mV offset in a single SOIC-14 package - making it the only option for space-constrained, ultra-high-impedance, four-channel analog signal chains.
Availability
LPC660IMX/NOPB is available at Aetrix Electronics and suitable for photodiode interfacing, precision electrochemical sensing, and single-supply active filtering requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LPC660IMX/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 over 90 years of innovation in precision analog design and manufacturing excellence.
The LPC660IMX/NOPB belongs to TI's legacy low-power CMOS op-amp family, engineered specifically for ultra-high-input-impedance, micropower, single-supply signal conditioning in scientific instrumentation and portable medical devices.
FAQ
What is the maximum supply voltage for the LPC660IMX/NOPB?
The absolute maximum supply voltage (V+ − V−) for the LPC660IMX/NOPB is 16 V. However, continuous operation above 13 V on V+ may adversely affect reliability - the recommended operating range is +4.75 V to +15.5 V, with guaranteed specifications validated from +5 V to +15 V. Always observe the 0.3 V input/output voltage limits relative to supply rails.
Does the LPC660IMX/NOPB support true rail-to-rail input common-mode range?
No - the LPC660IMX/NOPB features rail-to-rail *output* swing, but its input common-mode range extends only to V− (ground) and up to V+ − 1.9 V (min) at 25°C. It does not accept inputs at V+, so full rail-to-rail input operation is not supported. This makes it ideal for ground-referenced sensors but unsuitable for V+-referenced differential inputs without level shifting.
Can the LPC660IMX/NOPB drive capacitive loads, and what compensation is required?
The LPC660IMX/NOPB can oscillate with capacitive loads >100 pF in unity-gain configurations. Stable operation requires either a 50–100 Ω series resistor at the output plus a 5–10 pF capacitor from inverting input to output, or a pull-up resistor to V+ conducting ≥50 μA. These methods restore phase margin without degrading low-frequency gain or bandwidth.
What is the thermal resistance (θJA) of the LPC660IMX/NOPB in SOIC-14 package?
The junction-to-ambient thermal resistance (θJA) for the LPC660IMX/NOPB in 14-pin SOIC package is 115°C/W when soldered directly onto a standard PCB. At maximum ambient temperature (85°C) and full quiescent current (240 μA per amplifier), power dissipation remains well below thermal limits - enabling reliable operation without heatsinking in most industrial applications.
Is the LPC660IMX/NOPB pin-compatible with other TI quad op-amps like the TLC27L4?
No - the LPC660IMX/NOPB uses a standard SOIC-14 pinout for quad op-amps (e.g., Pin 1 = In−A, Pin 2 = In+A, Pin 3 = OutA, etc.), but its internal architecture, biasing, and output stage differ significantly from the TLC27L4. While pin numbering matches, electrical behavior (e.g., input bias current, offset, slew rate) is incompatible - direct substitution without circuit validation is not recommended.
LPC660IMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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/NOPB FAQ
1.How can I place an order for LPC660IMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC660IMX/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 LPC660IMX/NOPB reliable?
The price and inventory of LPC660IMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC660IMX/NOPB is usually 5 days.
3.What payment methods are accepted for LPC660IMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC660IMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC660IMX/NOPB?
LPC660IMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC660IMX/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 LPC660IMX/NOPB?
For technical support, including LPC660IMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC660IMX/NOPB requirements.
6.How does Aetrix verify that LPC660IMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LPC660IMX/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 LPC660IMX/NOPB meets industry standards.
7.What is the process for return or replacement of LPC660IMX/NOPB?
All LPC660IMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LPC660IMX/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 LPC660IMX/NOPB part is unused and in its original packaging.
Return procedure for LPC660IMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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