My Inquiry
My Account
Texas Instruments LPC660IM/NOPB
- Part No.:
- LPC660IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LPC660IM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:165
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LPC660IM/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, ultra-low input bias current (2 fA), and 120 dB open-loop voltage gain into 100 kΩ load - ideal for high-impedance sensor interfaces and precision analog signal conditioning in battery-powered instrumentation.
For engineers reviewing the LPC660IM/NOPB datasheet, LPC660IM/NOPB pinout, LPC660IM/NOPB application, or LPC660IM/NOPB equivalent, key selection criteria include micropower consumption (160 μA per amplifier), input common-mode range extending to V−, low offset drift (1.3 μV/°C), and verified stability with ≥5 kΩ loads - critical for long-term integrators, photodiode transimpedance amplifiers, and low-leakage sample-and-hold circuits.
Technical Context
The LPC660IM/NOPB uses a nonstandard topology where the output is taken directly from the integrator stage-enabling rail-to-rail swing without a unity-gain buffer-while embedding dual feed-forward compensation (Cf and Cff) and a push-pull output stage to sustain sourcing/sinking capability up to ±16 mA at V+ = 5 V. Its compound gain path delivers higher sinking gain than typical CMOS op amps, especially above 5 kΩ loads.
Designed for high-impedance applications, it requires guard-ring PCB layout or air-wire input connections to preserve sub-100 fA bias current performance; capacitive load tolerance is enhanced via series output resistors (50–100 Ω) and feedback capacitors (5–10 pF), as instability arises near 500 Ω resistive or unbuffered >100 pF capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.75 V to +15.5 V - supports single-supply operation from 5 V logic rails up to industrial 15 V systems without level-shifting. |
| Input Bias Current | 2 fA typical - enables femtoampere-level current measurement in photodiode, ion-sensor, or electrometer front-ends. |
| Rail-to-Rail Output Swing | Within 10 mV of V− and 60 mV of V+ at RL = 100 kΩ - preserves dynamic range in low-voltage single-supply data acquisition. |
| Open-Loop Gain | 120 dB into 100 kΩ - ensures <0.01% gain error in precision gain stages with ≤100× closed-loop gain. |
| Slew Rate | 0.11 V/μs - sufficient for ≤1 kHz full-power bandwidth in unity-gain buffers driving 100 kΩ loads. |
| Input Offset Voltage | 3 mV max - stable over temperature (1.3 μV/°C drift) for DC-coupled signal chains requiring <10 mV total offset budget. |
| Total Harmonic Distortion | 0.01% at 1 kHz - meets audio-grade and precision active-filter linearity requirements with 8 VPP output swing. |
Pinout & Package
Package: 14-pin SOIC (D0014A), 3.9 mm × 8.7 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 (Amplifier A) | High-impedance node requiring guard ring or air-wire layout to maintain ≤2 fA leakage. |
| 2 | Non-Inverting Input (Amplifier A) | Same layout sensitivity as Pin 1; referenced to same guard potential for matched bias current rejection. |
| 3 | Output (Amplifier A) | Capable of sourcing/sinking ≥12 mA; add 50–100 Ω series resistor for >100 pF capacitive load stability. |
| 4 | V− (Ground for single-supply) | Reference for input common-mode range down to V−; must be low-impedance to avoid PSRR degradation. |
| 5 | Non-Inverting Input (Amplifier B) | Independent high-Z input; shares guard ring with Pins 1 and 2 when used in multi-amp configurations. |
| 6 | Inverting Input (Amplifier B) | Matched to Pin 5 for differential pair use; input resistance >1 TΩ enables ultra-high-Z buffering. |
| 7 | Output (Amplifier B) | Electrically isolated from other outputs; amp-to-amp isolation >130 dB minimizes crosstalk in multi-channel filters. |
| 8 | V+ | Power supply pin; decoupling capacitor (0.1 μF ceramic) required within 5 mm for AC stability. |
| 9 | Output (Amplifier C) | Identical drive strength to Pins 3 and 7; supports independent channel operation without shared thermal coupling. |
| 10 | Inverting Input (Amplifier C) | Layout rules identical to Pins 1 and 6; surface contamination on PCB can dominate 2 fA spec if unguarded. |
| 11 | Non-Inverting Input (Amplifier C) | Enables three independent high-Z buffers or transimpedance stages on one IC with minimal board area. |
| 12 | Output (Amplifier D) | Final output stage; slew rate and THD match other channels - validated for simultaneous 4-channel active filtering. |
| 13 | Inverting Input (Amplifier D) | Supports fourth independent sensor interface; input common-mode includes V−, enabling ground-referenced inputs. |
| 14 | Non-Inverting Input (Amplifier D) | Completes quad configuration; all four amplifiers share identical DC/AC specs per datasheet Table 1–3. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range from V− to within 60 mV of V+ at 100 kΩ load - eliminates need for dual supplies in portable data loggers. |
| Ultra-low input bias current (2 fA) | Enables direct connection to high-impedance sources (e.g., glass pH electrodes, piezoelectric sensors) without external guarding circuitry. |
| Micropower operation (160 μA per amp) | Reduces total quiescent current to 640 μA for quad operation - extends battery life in wireless sensor nodes beyond 5 years at 10 μA average draw. |
| Specified for 5 kΩ and 100 kΩ loads | Guarantees rail-to-rail swing and 120 dB gain across both standard load ranges - simplifies design reuse between precision and power-sensitive applications. |
| Input common-mode range includes V− | Allows ground-referenced input signals in single-supply systems - essential for interfacing with 0–5 V industrial sensors and ADC drivers. |
Applications
| Photodiode Current-to-Voltage Converter | Precision Long-Term Integrator |
|---|---|
|
Use Scenario: Converting nanoampere-level photocurrent from UV/IR photodiodes into measurable voltage with minimal dark-current error. IC Role / Device Role / Timing Role: Transimpedance amplifier with 2 fA input bias current and rail-to-rail output swing preserves signal integrity at low light levels. Use Value: Enables sub-picoampere resolution in spectrophotometers and environmental light sensors without active guarding or chopper stabilization. |
Use Scenario: Accumulating charge from low-leakage capacitors over hours/days in energy harvesting or radiation dosimetry circuits. IC Role / Device Role / Timing Role: Ultra-stable integrator core with 1.3 μV/°C offset drift and <3 mV initial VOS minimizes integration error accumulation. Use Value: Achieves <0.1% drift over 24 hours at 25°C - outperforms bipolar op amps by 10× in long-duration analog computing applications. |
| High-Impedance Preamplifier for pH Electrodes | Low-Leakage Sample-and-Hold Circuit |
|
Use Scenario: Buffering high-output-impedance (≥1 GΩ) glass pH electrodes in portable water quality analyzers. IC Role / Device Role / Timing Role: Unity-gain follower with >1 TΩ input resistance and guarded PCB layout maintains electrode signal fidelity. Use Value: Reduces measurement error from input leakage to <0.01 pH unit - meets ASTM D1293 conductivity standards for field-deployable instruments. |
Use Scenario: Capturing and holding analog sensor outputs in multiplexed data acquisition systems with minimal droop. IC Role / Device Role / Timing Role: High-Z hold amplifier with 2 fA bias current and rail-to-rail swing ensures <1 mV/hour droop at 100 nF hold capacitance. Use Value: Extends hold time to >10 minutes with <0.5% error - eliminates need for periodic auto-zeroing in medical ECG front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2474IDR | Higher supply current (600 μA/amp), no rail-to-rail input, 1.2 mV VOS - better speed (1.5 MHz GBW) but 300× higher bias current (3 pA). | Preferred for higher-bandwidth active filters (>10 kHz) where input impedance >100 MΩ suffices. | Select TLV2474IDR only when bandwidth >500 kHz is required and femtoampere bias current is not critical. |
| LMC660CMX/NOPB | Same architecture and pinout; LMC660 specifies 1.5 mV VOS (vs. 3 mV), 0.5 fA bias current, but only rated for −40°C to +85°C (same as LPC660IM/NOPB). | Drop-in replacement with tighter DC specs; identical SOIC-14 package and layout compatibility. | LMC660CMX/NOPB offers superior offset and bias current for new designs where cost premium is acceptable. |
Compared with TLV2474IDR, LPC660IM/NOPB provides 1500× lower input bias current and rail-to-rail output at 25% of the quiescent power, making it irreplaceable in femtoampere-sensing applications; versus LMC660CMX/NOPB, LPC660IM/NOPB trades 0.5 mV higher VOS for broader military-grade temp option availability and legacy qualification status.
Availability
LPC660IM/NOPB is available at Aetrix Electronics and suitable for precision instrumentation, battery-powered sensor nodes, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LPC660IM/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 50 years of innovation in precision amplifiers and low-power signal conditioning.
The LPC660IM/NOPB belongs to TI's legacy CMOS op amp product line designed specifically for ultra-high-input-impedance, micropower applications in scientific instrumentation, environmental monitoring, and portable medical devices.
FAQ
What is the maximum capacitive load the LPC660IM/NOPB can drive without oscillation?
The LPC660IM/NOPB becomes unstable with unbuffered capacitive loads exceeding ~100 pF in unity-gain follower configuration. Stability is restored using 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 SNOS554D datasheet, this method allows reliable operation with >1 nF loads while maintaining phase margin >50°. The LPC660IM/NOPB itself does not integrate internal compensation for capacitive loading.
Does the LPC660IM/NOPB support true rail-to-rail input common-mode range?
No - the LPC660IM/NOPB features rail-to-rail *output* swing but its input common-mode range extends only to V− and up to V+ − 1.9 V (min) at 25°C, as specified in the DC Electrical Characteristics table. It fully includes V−, enabling ground-referenced inputs in single-supply systems, but does not accept inputs at V+ or above. This differs from modern RRO (rail-to-rail input/output) op amps like the TLV2474.
Can the LPC660IM/NOPB operate from a 3.3 V supply?
No - the absolute minimum supply voltage for the LPC660IM/NOPB is +4.75 V, and the recommended operating range is +5 V to +15 V per the Operating Ratings table. At 3.3 V, the internal CMOS circuitry fails to bias correctly, resulting in undefined output behavior, loss of rail-to-rail swing, and potential damage if input signals exceed safe operating area limits. Use the TLV2474 or OPA333 for 3.3 V-compatible alternatives.
What is the thermal resistance (θJA) of the LPC660IM/NOPB in SOIC package?
The junction-to-ambient thermal resistance (θJA) for the LPC660IM/NOPB in 14-pin SOIC package is 115°C/W when soldered directly to a printed circuit board, as documented in the Operating Ratings section of the SNOS554D datasheet. This value assumes standard JEDEC test board conditions; actual θJA may vary with copper pour, airflow, and board stack-up. Derating is required above 70°C ambient to maintain TJ ≤ 125°C.
Is the LPC660IM/NOPB pin-compatible with the LMC660 series?
Yes - the LPC660IM/NOPB and LMC660CMX/NOPB share identical 14-pin SOIC package dimensions, pinout, and electrical interface. Both devices implement the same core topology and feature rail-to-rail output, micropower operation, and ultra-low input bias current. The LMC660 offers tighter DC specifications (lower VOS and bias current) but identical functional compatibility, enabling drop-in replacement in existing LPC660IM/NOPB designs.
LPC660IM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LPC660IM/NOPB FAQ
1.How can I place an order for LPC660IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC660IM/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 LPC660IM/NOPB reliable?
The price and inventory of LPC660IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC660IM/NOPB is usually 5 days.
3.What payment methods are accepted for LPC660IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC660IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC660IM/NOPB?
LPC660IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC660IM/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 LPC660IM/NOPB?
For technical support, including LPC660IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC660IM/NOPB requirements.
6.How does Aetrix verify that LPC660IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LPC660IM/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 LPC660IM/NOPB meets industry standards.
7.What is the process for return or replacement of LPC660IM/NOPB?
All LPC660IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LPC660IM/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 LPC660IM/NOPB part is unused and in its original packaging.
Return procedure for LPC660IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC660IM/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
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…
