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Texas Instruments LPC662IM/NOPB
- Part No.:
- LPC662IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LPC662IM/NOPB.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,435
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Product details
Overview
LPC662IM/NOPB from Texas Instruments (formerly National Semiconductor) is a low-power CMOS dual operational amplifier designed for single-supply precision analog signal conditioning. It delivers rail-to-rail output swing, ultra-low input bias current (2 fA), 3 mV input offset voltage, and operates from +4.75 V to +15.5 V - enabling high-impedance sensor interfacing in battery-powered instrumentation and portable medical devices.
For engineers reviewing the LPC662IM/NOPB datasheet, LPC662IM/NOPB pinout, LPC662IM/NOPB application, or LPC662IM/NOPB equivalent, this page provides verified electrical specifications, SOIC-8 package details, real-world use cases including photodiode current-to-voltage conversion and long-term integrators, and two validated alternative op-amps with documented functional trade-offs.
Technical Context
The LPC662IM/NOPB uses a compound integrator-based output stage-bypassing the traditional unity-gain buffer-to achieve rail-to-rail swing while maintaining stability into 5 kΩ loads. Its architecture embeds dual feed-forward paths (Cf and Cff) and a push-pull output stage, delivering distinct sourcing/sinking gain behavior: ≥1000 V/mV (sourcing, RL = 100 kΩ) and ≥500 V/mV (sinking, same load).
It features an input common-mode range extending to ground (−0.1 V min at V+ = 5 V), CMRR ≥63 dB (typ. 83 dB), PSRR ≥68 dB, and ultra-low 1.3 µV/°C offset drift - all specified across −40°C to +85°C for industrial operation. Input referred voltage noise is 42 nV/√Hz at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.75 V to +15.5 V - supports direct interface with 5 V and 12 V systems without level-shifting. |
| Input Bias Current | 2 fA typical - enables picoampere-level current sensing in photodiode and ion-selective electrode circuits. |
| Input Offset Voltage | 3 mV max - ensures ≤0.06% error in 5 V full-scale precision current-to-voltage conversion. |
| Rail-to-Rail Output | Swings within 60 mV of rails (V+ = 5 V, RL = 100 kΩ) - maximizes dynamic range in single-supply data acquisition. |
| Slew Rate | 0.11 V/µs - sufficient for <10 kHz small-signal amplification with <1% distortion (0.01% THD @ 1 kHz). |
| Quiescent Current | 140 µA max per amplifier - enables micropower operation; total <280 µA for dual channel at 5 V. |
| Gain-Bandwidth Product | 0.35 MHz - sets usable closed-loop bandwidth to ~35 kHz at unity gain, suitable for anti-aliasing and active filtering. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), JEDEC MS-012 (Package Drawing D), RoHS-compliant, Sn lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Inverting Input (–) | Differential input node | Accepts signal referenced to ground; common-mode range includes 0 V - enables true single-supply transimpedance amplifier design. |
| Non-Inverting Input (+) | Differential input node | High-impedance node (RIN >1 TΩ); guard ring layout required to preserve 2 fA bias current performance. |
| Output A | Amplifier A output | Rail-to-rail capable; drives ≥16 mA sink/source into 5 kΩ - supports active filter and peak detector loads. |
| V– (Ground) | Negative supply terminal | Connected to system ground in single-supply mode; input common-mode extends to this pin. |
| V+ (Supply) | Positive supply terminal | Accepts 4.75–15.5 V; internal regulation ensures stable biasing across voltage range. |
| Output B | Amplifier B output | Independent channel; identical specs to Output A - enables dual-path signal conditioning (e.g., differential pair + reference buffer). |
| Non-Inverting Input B (+) | Differential input node | Electrically isolated from Channel A inputs; crosstalk rejection >130 dB prevents inter-channel interference. |
| Inverting Input B (–) | Differential input node | Matches Channel A performance; allows matched dual configurations like instrumentation amplifiers or dual integrators. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 4.94 V output at V+ = 5 V into 100 kΩ - preserves signal headroom in low-voltage microcontroller ADC interfaces. |
| Micropower operation | 140 µA max supply current per amplifier - enables multi-year battery life in portable gas sensors and wearable biosensors. |
| Ultra-low input bias current | 2 fA typical - reduces leakage-induced offset in high-Z pH probe and capacitive touch preamplifiers by >100× vs bipolar op-amps. |
| Input common-mode includes ground | Operates with inputs at 0 V - eliminates need for negative supply in single-ended sensor front-ends (e.g., thermocouple cold-junction compensation). |
| Specified for 5 kΩ and 100 kΩ loads | Guarantees 1000 V/mV large-signal gain into 100 kΩ and ≥200 V/mV into 5 kΩ - supports both high-Z buffers and moderate-drive active filters. |
Applications
| Photodiode Current-to-Voltage Converter | Long-Term Integrator |
|---|---|
|
Use Scenario: Converting weak photocurrent (pA–nA) from silicon photodiodes into measurable voltage for optical smoke detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low bias current preserving signal integrity; rail-to-rail output maximizes ADC utilization. Use Value: 2 fA input bias current minimizes dark-current-induced offset; 3 mV VOS ensures <0.06% full-scale error at 5 V output. |
Use Scenario: Accumulating charge over hours/days in radiation dosimeters or electrochemical sensors. IC Role / Device Role / Timing Role: Precision integrator using low-drift, low-bias-current topology; input common-mode to ground simplifies feedback capacitor grounding. Use Value: 1.3 µV/°C offset drift limits integration error to <1 mV/hour at 25°C ambient; 1000 V/mV gain ensures stable pole placement. |
| High-Impedance Preamplifier | Active Filter (10 Hz Bandpass) |
|
Use Scenario: Amplifying mV-level signals from piezoelectric accelerometers or electret microphones without loading. IC Role / Device Role / Timing Role: Non-inverting buffer with >1 TΩ input resistance; rail-to-rail swing avoids clipping on low-voltage supplies. Use Value: Input resistance >1 TΩ prevents signal attenuation; 0.01% THD at 1 kHz maintains audio fidelity in battery-powered recorders. |
Use Scenario: Filtering 10 Hz biopotential signals (e.g., ECG baseline wander) in portable patient monitors. IC Role / Device Role / Timing Role: Dual-op-amp second-order bandpass topology; matched channels ensure consistent Q and center frequency. Use Value: 0.35 MHz GBW supports precise 10 Hz tuning (Q = 2.1); low noise (42 nV/√Hz) preserves SNR in microvolt-level bio-signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher supply current (600 µA/ch), higher VOS (2 mV typ), but 2.5 V min supply - better for ultra-low-voltage (2.7 V) systems. | Not suitable for <5 V single-supply precision current sensing due to 10 pA bias current (5000× higher than LPC662IM/NOPB). | Select when operating below 4.75 V or requiring faster slew rate (0.5 V/µs); avoid where femtoampere bias current is critical. |
| LMV722MMX/NOPB | Lower quiescent current (120 µA/ch), but only 1.8 V min supply and 50 pA bias current - trades ultra-low IB for wider voltage range. | Acceptable for general-purpose buffering but not for photodiode or ion-sensor front-ends demanding sub-pA leakage. | Prefer for cost-sensitive, non-precision applications; reject for high-Z sensor interfaces where 2 fA bias current is mandatory. |
Compared with TLV2462IDR and LMV722MMX/NOPB, the LPC662IM/NOPB uniquely combines femtoampere input bias current, rail-to-rail output, and guaranteed 5 kΩ drive capability - making it irreplaceable in ultra-high-impedance, single-supply measurement systems where leakage and offset errors must be minimized.
Availability
LPC662IM/NOPB is available at Aetrix Electronics and suitable for precision sensor signal conditioning, portable medical instrumentation, and low-power industrial data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LPC662IM/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 acquired National Semiconductor in 2011 and maintains its legacy precision analog portfolio. TI is a global semiconductor leader with decades of expertise in high-performance op-amps and data converters.
The LPC662IM/NOPB belongs to National's legacy micropower CMOS op-amp family, engineered specifically for single-supply, high-impedance analog front-ends in instrumentation, medical, and environmental monitoring systems.
FAQ
What is the maximum operating supply voltage for the LPC662IM/NOPB?
The LPC662IM/NOPB has an absolute maximum supply voltage of 16 V (V+ − V−), with a recommended operating range of +4.75 V to +15.5 V. Exceeding 15.5 V risks violating guaranteed specifications; operation at 15 V is fully characterized and supported across the −40°C to +85°C temperature range. The LPC662IM/NOPB datasheet confirms rail-to-rail output swing remains functional up to 15 V with 100 kΩ load.
Does the LPC662IM/NOPB support true single-supply operation with inputs at ground?
Yes, the LPC662IM/NOPB supports true single-supply operation: its input common-mode voltage range extends to V− (ground) and up to V+ − 2.3 V. At V+ = 5 V, inputs can operate from −0.1 V to +2.7 V - enabling direct connection of grounded sensors (e.g., thermistors, pH electrodes) without level-shifting circuitry. This is explicitly guaranteed in the DC Electrical Characteristics table for all variants including LPC662IM/NOPB.
What is the typical input bias current of the LPC662IM/NOPB, and why does it matter?
The LPC662IM/NOPB has a typical input bias current of 2 fA (0.002 pA), with a maximum of 100 pA across temperature. This ultra-low value is critical for high-impedance applications: in a photodiode transimpedance amplifier with a 1 GΩ feedback resistor, 2 fA bias current contributes only 2 mV offset - versus >200 mV for standard bipolar op-amps. The LPC662IM/NOPB datasheet specifies this parameter under "DC Electrical Characteristics" with test conditions confirming validity at 25°C and temperature extremes.
Can the LPC662IM/NOPB drive a 5 kΩ load while maintaining rail-to-rail output swing?
Yes, the LPC662IM/NOPB is explicitly specified for 5 kΩ loads: at V+ = 5 V, it guarantees a minimum output swing of 4.75 V (high) and 0.04 V (low) into 5 kΩ - achieving >95% rail-to-rail performance. The "DC Electrical Characteristics" table shows these values under "Output Swing" with RL = 5 kΩ to V+/2. This capability enables direct interfacing with moderate-impedance filters and ADC reference buffers without external gain stages.
Is the LPC662IM/NOPB pin-compatible with other dual op-amps in SOIC-8 packages?
No, the LPC662IM/NOPB is not pin-compatible with generic dual op-amps (e.g., LM358, TL072) - its pinout follows National Semiconductor's standard dual-amplifier configuration: Pins 1/7 are outputs, Pins 2/6 are inverting inputs, Pins 3/5 are non-inverting inputs, and Pins 4/8 are supplies. While physically fitting SOIC-8 footprints, substituting without verifying pin mapping risks incorrect connections. The LPC662IM/NOPB connection diagram (DS010548-1) confirms this layout.
LPC662IM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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:
- 86µA (x2 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LPC662IM/NOPB FAQ
1.How can I place an order for LPC662IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC662IM/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 LPC662IM/NOPB reliable?
The price and inventory of LPC662IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC662IM/NOPB is usually 5 days.
3.What payment methods are accepted for LPC662IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC662IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC662IM/NOPB?
LPC662IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC662IM/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 LPC662IM/NOPB?
For technical support, including LPC662IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC662IM/NOPB requirements.
6.How does Aetrix verify that LPC662IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LPC662IM/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 LPC662IM/NOPB meets industry standards.
7.What is the process for return or replacement of LPC662IM/NOPB?
All LPC662IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LPC662IM/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 LPC662IM/NOPB part is unused and in its original packaging.
Return procedure for LPC662IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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