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Texas Instruments LMC6044AIM/NOPB
- Part No.:
- LMC6044AIM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6044AIM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,618
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Product details
Overview
LMC6044AIM/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 (to within 30 mV of rails at 15 V), and operates from 4.5 V to 15 V single supply - enabling precision signal conditioning in pH-probe buffers and photodiode preamplifiers.
For engineers reviewing the LMC6044AIM/NOPB datasheet, LMC6044AIM/NOPB pinout, LMC6044AIM/NOPB application, or LMC6044AIM/NOPB equivalent, key selection criteria include confirmed 2 fA input bias current, 100 kHz gain-bandwidth product, SOIC-14 package compatibility, and verified rail-to-rail output performance across –40°C to +85°C.
Technical Context
The LMC6044AIM/NOPB uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining stable operation under capacitive loads and high-impedance feedback networks. Its input common-mode range includes ground, and its output drives to both supply rails without external pulldown resistors - critical for single-supply instrumentation front-ends.
It features 115 dB crosstalk rejection between channels, 75 dB minimum PSRR (positive rail), and 84 dB minimum PSRR (negative rail), supporting multi-channel signal paths in portable analyzers where channel isolation and power-supply noise immunity are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | 2 fA typical - enables femtoamp-level current measurement in piezoelectric charge amplifiers and electrometers. |
| Supply current per channel | 10 µA/amp at 5 V - supports >1-year battery life in continuous-monitoring devices with four independent analog channels. |
| Gain-bandwidth product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., pH, transducer outputs) without stability compromise. |
| Rail-to-rail output swing | Within 30 mV of V+ and V− at 15 V, RL = 100 kΩ - maximizes dynamic range in 3.3 V or 5 V microcontroller ADC interfaces. |
| Input common-mode range | Includes ground (0 V) up to (V+) − 1.9 V - allows direct interfacing to grounded sensors (e.g., thermistors, pH electrodes) without level-shifting. |
| Open-loop voltage gain | 300 V/mV minimum - ensures <0.1% gain error in unity-gain buffer configurations with 1 MΩ source impedance. |
| Crosstalk rejection | 115 dB at 100 Hz - prevents inter-channel coupling in multi-sensor data acquisition systems (e.g., gas detector arrays). |
Pinout & Package
LMC6044AIM/NOPB is supplied in a 14-pin SOIC (D package) with exposed pad not present; thermal resistance RθJA = 115°C/W. Pin functions are validated per TI SNOS611F Rev. March 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Independent buffered outputs; each capable of sourcing/sinking ≥16 mA at 5 V for driving ADC reference buffers or LED indicators. |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs; 2 fA leakage enables direct connection to high-Z sources (e.g., photodiodes, piezoelectric elements). |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs; common-mode range includes ground, supporting single-supply sensor biasing without dual-rail supplies. |
| 4 | V+ | Positive supply terminal; accepts 4.5 V to 15 V; decoupling capacitor required within 1 cm for stable 100 kHz operation. |
| 11 | V− | Negative supply (ground in single-supply mode); must be low-impedance return path for all four channels' bias currents. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full-scale swing to within 30 mV of V+ and V− at 15 V, eliminating need for external pullup/pulldown resistors in battery-powered designs. |
| Ultra-low input bias current | 2 fA typical enables accurate integration and charge amplification in piezoelectric and electrochemical sensor interfaces. |
| Single-supply operation | Operates from 4.5 V to 15 V with input common-mode including ground - simplifies power architecture in portable instruments. |
| High input impedance | >10 TΩ resistance allows direct connection to megohm-range transducers (e.g., pH glass electrodes) without signal attenuation. |
| Channel crosstalk isolation | 115 dB rejection at 100 Hz prevents interference between simultaneous measurements in multi-sensor systems. |
Applications
| pH-Probe Buffer Amplifier | Photodiode Preamplifier |
|---|---|
|
Use Scenario: Amplifying high-impedance mV-level output from glass pH electrodes in handheld water quality testers. IC Role / Device Role / Timing Role: Unity-gain buffer with femtoamp input leakage, preserving electrode potential integrity over temperature and humidity. Use Value: Enables ±0.01 pH accuracy by minimizing input current-induced offset drift and eliminating need for guard-ring PCB layout in cost-sensitive designs. |
Use Scenario: Converting nanoamp photocurrent from silicon photodiodes in portable spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with 2 fA input bias, minimizing dark-current error and maximizing signal-to-noise ratio. Use Value: Supports 16-bit resolution at 100 Hz sampling with <100 nV/√Hz input noise - critical for low-light absorbance detection. |
| Battery Voltage Monitor | Piezoelectric Charge Amplifier |
|
Use Scenario: Monitoring cell voltage in multi-cell Li-ion battery packs for medical wearables with 10-year shelf life. IC Role / Device Role / Timing Role: Precision resistor-divider buffer consuming <40 µA total for four channels - extending standby time. Use Value: Delivers 0.1% gain accuracy over –40°C to +85°C while drawing less than 1 µA per volt monitored - enabling decade-long firmware updates. |
Use Scenario: Integrating charge from impact-sensitive piezoelectric films in structural health monitoring nodes. IC Role / Device Role / Timing Role: Low-leakage integrator with rail-to-rail output, capturing transient mechanical events without saturation. Use Value: Sustains >100-second integration time with <1 mV/h drift - enabling detection of sub-millisecond vibration events in energy-harvesting edge nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | 25 µA/amp supply current; 650 kHz GBW; 1 pA input bias - 1000× higher leakage than LMC6044AIM/NOPB. | Suitable for general-purpose low-power sensing but not femtoamp-level current measurement or high-Z electrode buffering. | Select when bandwidth >100 kHz is required and input leakage >1 pA is acceptable. |
| OPA2333PWR | 17 µA/amp supply current; zero-drift architecture; 200 pA input bias - 100× higher leakage, no rail-to-rail output at 5 V. | Preferred for DC-critical applications requiring <1 µV/°C offset drift, but unsuitable for grounded-input pH probes. | Select when ultra-low offset drift dominates over input leakage and rail-to-rail output requirements. |
Compared with TLV2464IDR and OPA2333PWR, LMC6044AIM/NOPB uniquely combines femtoamp input bias, true rail-to-rail output, and single-supply operation - making it irreplaceable in electrochemical and photonic front-ends where leakage-induced error directly limits measurement resolution.
Availability
LMC6044AIM/NOPB is available at Aetrix Electronics and suitable for pH probe buffers, photodiode preamplifiers, and battery voltage monitors requiring stable component supply across industrial, medical, and environmental instrumentation programs.
Supply support for LMC6044AIM/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-amps and low-power signal chains.
The LMC604x family was designed specifically for ultra-low-power, high-impedance sensor interface applications - targeting portable analytical instruments, battery-operated safety systems, and electrochemical measurement platforms.
FAQ
What is the maximum supply voltage for LMC6044AIM/NOPB?
The absolute maximum supply voltage for LMC6044AIM/NOPB is 16 V, but the recommended operating range is 4.5 V to 15.5 V for single-supply use. Operation above 15.5 V risks exceeding junction temperature limits and degrading long-term reliability - especially in SOIC-14 packages with RθJA = 115°C/W. Always observe derating curves in TI SNOS611F Section 5.3.
Does LMC6044AIM/NOPB support true rail-to-rail input?
No, LMC6044AIM/NOPB does not support rail-to-rail input - its input common-mode range extends to ground and up to (V+) − 1.9 V at room temperature. However, it does provide rail-to-rail output swing (within 30 mV of both rails), which is explicitly confirmed in Section 5.7 of the TI SNOS611F datasheet for all tested load conditions.
Can LMC6044AIM/NOPB drive capacitive loads directly?
LMC6044AIM/NOPB exhibits limited direct capacitive-load tolerance; stability degrades beyond ~100 pF without compensation. TI recommends using a series resistor (e.g., 20 Ω) between output and load, or adding a pullup resistor to V+ (≥10 µA current) as shown in Figure 6-3 of SNOS611F. For >1 nF loads, indirect driving via a follower stage is advised.
What is the guaranteed input bias current specification for LMC6044AIM/NOPB over temperature?
LMC6044AIM/NOPB guarantees ±4 pA maximum input bias current over the full –40°C to +85°C operating range, per Section 5.7 of TI SNOS611F. The 2 fA typical value applies only at 25°C; design margins must account for the 1000× increase at temperature extremes to avoid offset errors in high-gain transimpedance stages.
Is LMC6044AIM/NOPB pin-compatible with other LMC604x variants?
LMC6044AIM/NOPB is not pin-compatible with LMC6041 or LMC6042 due to differing channel counts and pinouts: LMC6044 uses 14-pin SOIC with dedicated pins for four independent channels, while LMC6042 uses 8-pin SOIC. Substituting requires PCB redesign - no drop-in replacement exists within the LMC604x family for quad-channel functionality.
LMC6044AIM/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
LMC6044AIM/NOPB FAQ
1.How can I place an order for LMC6044AIM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044AIM/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 LMC6044AIM/NOPB reliable?
The price and inventory of LMC6044AIM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044AIM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6044AIM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044AIM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044AIM/NOPB?
LMC6044AIM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044AIM/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 LMC6044AIM/NOPB?
For technical support, including LMC6044AIM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044AIM/NOPB requirements.
6.How does Aetrix verify that LMC6044AIM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6044AIM/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 LMC6044AIM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6044AIM/NOPB?
All LMC6044AIM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044AIM/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 LMC6044AIM/NOPB part is unused and in its original packaging.
Return procedure for LMC6044AIM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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