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Texas Instruments LMC6044IM/NOPB
- Part No.:
- LMC6044IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6044IM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,702
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Product details
Overview
LMC6044IM/NOPB from Texas Instruments is a quad-channel, micropower CMOS operational amplifier optimized for ultra-low-input-current, single-supply battery-powered systems. It delivers 2 fA typical input bias current, 10 µA/amp quiescent supply current, rail-to-rail output swing, and input common-mode range extending to ground - enabling precision signal conditioning in pH probes, photodiode preamps, and piezoelectric charge amplifiers.
For engineers reviewing the LMC6044IM/NOPB datasheet, LMC6044IM/NOPB pinout, LMC6044IM/NOPB application, or LMC6044IM/NOPB equivalent, key selection criteria include verified 2 fA input leakage, confirmed 14-pin SOIC (D) package mapping, guaranteed rail-to-rail output at 5V/15V single supply, and documented crosstalk rejection >115 dB between channels - all critical for low-power sensor front-ends and portable instrumentation.
Technical Context
The LMC6044IM/NOPB employs TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining stable operation across 4.5V–15V single-supply rails. Its architecture supports true rail-to-rail output swing without external pulldown resistors and accepts input voltages down to ground - eliminating level-shifting requirements in single-supply transducer interfaces.
It features 100 kHz gain-bandwidth product, 0.015 V/µs slew rate (typ), and >10 TΩ input resistance, with thermal performance characterized for 14-pin SOIC (RθJA = 115°C/W). Channel crosstalk is specified at 115 dB, confirming high isolation for multi-channel simultaneous sampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 2 fA typical - enables femtoamp-level current measurement in photodiode and ion-selective electrode circuits without significant error. |
| Supply Current per Channel | 10 µA/amp at 5V - allows four independent amplifiers to operate continuously on a single AA battery for >10 years. |
| Input Common-Mode Range | Includes ground (0 V) to (V+) – 2.3 V - supports direct interfacing with grounded sensors like pH electrodes and thermocouples. |
| Rail-to-Rail Output Swing | 0.004 V to 4.987 V at 5V supply (100 kΩ load) - maximizes dynamic range in low-voltage data acquisition systems. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., piezoelectric accelerometers, gas detectors). |
| Crosstalk Rejection | 115 dB at 100 Hz - ensures channel independence in multi-sensor monitoring systems without cross-coupling artifacts. |
| Open-Loop Gain | 300 V/mV minimum - provides ≥60 dB loop gain at unity gain, supporting stable 12-bit precision in buffered configurations. |
Pinout & Package
LMC6044IM/NOPB is housed in a 14-pin SOIC (D) package with standard JEDEC MS-012AC footprint (5.3 mm × 10.2 mm, 1.27 mm pitch). Pin 1 is marked by a beveled corner or dot; device orientation follows TI's top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load directly; rail-to-rail swing eliminates need for pullup/pulldown resistors. |
| 2 | –IN A | Inverting input of channel A - connects to feedback network; ultra-low leakage preserves high-Z source integrity. |
| 3 | +IN A | Noninverting input of channel A - accepts grounded or negative-referenced signals without level shifters. |
| 4 | V+ | Positive supply rail - accepts 4.5V–15V single supply; decoupling capacitor required at pin for stability. |
| 5 | +IN B | Noninverting input of channel B - electrically isolated from other inputs; used for differential sensing pairs. |
| 6 | –IN B | Inverting input of channel B - matches pin 2 electrical characteristics; supports matched dual instrumentation paths. |
| 7 | OUT B | Amplifier B output - identical drive capability to pin 1; enables synchronous dual-channel buffering. |
| 8 | OUT C | Amplifier C output - shares same output stage specs as pins 1 and 7; supports three independent analog channels. |
| 9 | –IN C | Inverting input of channel C - validated for <2 fA leakage; used in multi-transducer signal chains. |
| 10 | +IN C | Noninverting input of channel C - referenced to same ground as pins 3 and 5; maintains common-mode consistency. |
| 11 | V– | Negative supply rail - tied to ground in single-supply operation; serves as reference for all input/output stages. |
| 12 | +IN D | Noninverting input of channel D - completes quad configuration; supports four-sensor parallel acquisition. |
| 13 | –IN D | Inverting input of channel D - matches leakage and offset specs of other inputs; enables fourth feedback path. |
| 14 | OUT D | Amplifier D output - fully functional rail-to-rail output; allows independent gain staging per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical - preserves signal integrity in femtoamp-level current sources (e.g., radiation detectors, electrophysiology). |
| Rail-to-rail output swing | 0.004 V to 4.987 V at 5V supply - delivers full-scale ADC utilization without external level-shifting circuitry. |
| Single-supply operation | 4.5V–15V range with ground-referenced inputs - simplifies power architecture in portable medical and environmental monitors. |
| High input impedance | >10 TΩ - prevents loading of high-impedance sources such as glass pH electrodes and piezoelectric sensors. |
| Quad-channel integration | Four independent amplifiers in one 14-pin SOIC - reduces PCB area and component count in multi-sensor systems. |
Applications
| pH-Probe Buffer Amplifier | Photodiode Preamplifier |
|---|---|
Use Scenario: High-impedance pH electrode (≥1 GΩ) connected to an ADC in a handheld water quality meter. IC Role / Device Role / Timing Role: Voltage follower buffer isolating electrode from ADC input capacitance and noise. Use Value: 2 fA input bias current prevents electrode polarization drift; rail-to-rail output ensures full 0–14 pH range maps to 0–5 V ADC input. |
Use Scenario: Reverse-biased silicon photodiode generating 10 pA–1 nA photocurrent in a smoke detector. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal dark-current error. Use Value: Ultra-low input leakage avoids false alarms; 100 kHz GBW supports fast pulse detection from scattered light events. |
| Piezoelectric Charge Amplifier | Battery Monitoring System |
Use Scenario: Quartz crystal accelerometer producing charge pulses during vibration events in predictive maintenance gear. IC Role / Device Role / Timing Role: Charge-to-voltage converter with high-Z integrator node for low-frequency (<100 Hz) acceleration sensing. Use Value: Input impedance >10 TΩ minimizes signal decay time; quad configuration enables simultaneous 3-axis sensing. |
Use Scenario: Precision voltage monitoring of lithium coin-cell batteries (2.0–3.6 V) in wireless sensor nodes. IC Role / Device Role / Timing Role: Low-drift differential amplifier measuring cell voltage against internal reference. Use Value: 10 µA/amp supply current extends battery life; input common-mode range including ground enables direct cell-terminal sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | 25 µA/amp supply current, 10 pA input bias current, 2.5 V–6 V supply range - higher power and leakage than LMC6044IM/NOPB. | Targeted at general-purpose low-voltage systems where femtoamp leakage is not required. | Select when wider supply range (2.5 V) and higher speed (6 MHz GBW) outweigh ultra-low-leakage needs. |
| LTC1052CN#PBF | Zero-drift chopper architecture, 1.5 µV max offset, but 120 µA/amp supply current and no rail-to-rail output - incompatible with single-supply ground-sensing. | Suitable for precision DC-coupled instrumentation where offset drift dominates over power or leakage. | Choose only if microvolt-level offset stability is mandatory and battery life is secondary. |
Compared with TLV2464IDR and LTC1052CN#PBF, the LMC6044IM/NOPB uniquely combines femtoamp input leakage, rail-to-rail output, and sub-10 µA/amp quiescent current - making it irreplaceable in long-life, high-impedance sensor interfaces where signal fidelity and energy efficiency are co-constrained.
Availability
LMC6044IM/NOPB is available at Aetrix Electronics and suitable for pH-probe buffers, photodiode preamplifiers, and piezoelectric charge amplifiers requiring stable component supply across industrial, medical, and environmental monitoring programs.
Supply support for LMC6044IM/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 decades of expertise in precision op-amp design and low-power system solutions.
The LMC604x family was engineered specifically for ultra-low-power, high-impedance sensor signal conditioning - targeting portable analytical instruments, battery-powered safety systems, and electrochemical measurement platforms where femtoamp leakage and microamp supply current are non-negotiable.
FAQ
What is the maximum supply voltage for LMC6044IM/NOPB?
The LMC6044IM/NOPB supports a maximum supply voltage of 15.5 V in single-supply mode (V+ to V–), with absolute maximum rating at 16 V. Operation above 15.5 V risks exceeding safe junction temperature and may degrade long-term reliability. The device is rated for continuous operation from 4.5 V to 15.5 V, making it compatible with standard 5 V, 9 V, and 12 V battery or regulator supplies.
Does LMC6044IM/NOPB support true rail-to-rail input?
No, the LMC6044IM/NOPB does not support rail-to-rail input - its input common-mode range extends to ground (0 V) and up to (V+) – 2.3 V at room temperature. While this enables ground-referenced sensing, it does not accept signals at the positive rail. However, the output is fully rail-to-rail, delivering 0.004 V to 4.987 V at 5 V supply with 100 kΩ load - a key distinction confirmed in Section 5.7 of the official datasheet.
Can LMC6044IM/NOPB drive capacitive loads directly?
The LMC6044IM/NOPB is not optimized for direct capacitive-load driving; stability degrades with loads >100 pF. As documented in Section 6.1.3, external compensation is required - either a series resistor + capacitor network (e.g., 90 kΩ + 1 nF) or a pullup resistor to V+ conducting ≥10 µA. These methods restore phase margin and prevent oscillation, especially in sensor cable or ADC input buffering applications.
Is LMC6044IM/NOPB suitable for pH probe applications?
Yes, the LMC6044IM/NOPB is explicitly recommended for pH-probe buffer amplifiers per TI's official Applications section. Its 2 fA input bias current prevents electrode polarization, its input common-mode range includes ground, and its rail-to-rail output maximizes ADC resolution across the full 0–14 pH range. Layout best practices - including guard rings and low-leakage PCB materials - are essential to realize these benefits in production.
What is the thermal resistance (RθJA) of LMC6044IM/NOPB in SOIC package?
The LMC6044IM/NOPB in 14-pin SOIC (D) package has a junction-to-ambient thermal resistance (RθJA) of 115°C/W, as specified in Section 5.6 of the datasheet. This value assumes standard JEDEC 2S2P test board conditions. Derating is required above +85°C ambient; maximum junction temperature must remain ≤110°C to ensure reliability and parametric compliance.
LMC6044IM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 0.02V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.002 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 52µA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 15.5 V
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMC6044IM/NOPB FAQ
1.How can I place an order for LMC6044IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044IM/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 LMC6044IM/NOPB reliable?
The price and inventory of LMC6044IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044IM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6044IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044IM/NOPB?
LMC6044IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044IM/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 LMC6044IM/NOPB?
For technical support, including LMC6044IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044IM/NOPB requirements.
6.How does Aetrix verify that LMC6044IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6044IM/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 LMC6044IM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6044IM/NOPB?
All LMC6044IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044IM/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 LMC6044IM/NOPB part is unused and in its original packaging.
Return procedure for LMC6044IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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