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Texas Instruments LMC6044IM
- Part No.:
- LMC6044IM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6044IM.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,967
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Product details
Overview
LMC6044IM 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 5 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 LMC6044IM datasheet, LMC6044IM pinout, LMC6044IM application, or LMC6044IM equivalent, key selection criteria include verified input leakage performance at temperature, guaranteed rail-to-rail output drive into 25 kΩ loads, confirmed 100 kHz gain-bandwidth product, and SOIC-14 package compatibility with high-impedance PCB layout requirements.
Technical Context
The LMC6044IM uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input current without latch-up susceptibility. Its input stage includes ground-referenced common-mode range and internal compensation for stable operation with capacitive loads up to 1 nF when using external pull-up or feedback networks.
Each of its four independent amplifiers features matched offset voltage drift (1.3 µV/°C), >10 TΩ input resistance, and crosstalk rejection of 115 dB at 100 Hz - supporting simultaneous low-noise, low-drift signal paths in portable instrumentation without inter-channel interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | 2 fA typical - enables femtoamp-level current measurement in piezoelectric charge amplifiers without significant error. |
| Supply current per channel | 10 µA - allows four-channel operation at <65 µA total IQ, critical for multi-sensor battery life extension. |
| Rail-to-rail output swing | Within 30 mV of rails at 5 V / 100 kΩ - preserves full dynamic range in single-supply 3.3 V or 5 V systems. |
| Gain-bandwidth product | 100 kHz - supports DC-coupled sensor interfaces and low-frequency active filtering (e.g., 10 Hz anti-aliasing). |
| Input common-mode range | Includes ground to (V+) – 2.3 V - permits direct interfacing with grounded transducers like pH electrodes and silicon pressure sensors. |
| Crosstalk rejection | 115 dB at 100 Hz - ensures channel isolation in multi-channel data acquisition without calibration overhead. |
| Open-loop gain | 300 V/mV minimum - guarantees <0.1% gain error in unity-gain buffer configurations with 1 MΩ load. |
Pinout & Package
LMC6044IM is supplied in a 14-pin SOIC (D package) with standard JEDEC outline and 1.27 mm pitch. The package is RoHS-compliant, moisture-sensitive level 1, and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A–D | Amplifier output terminals; each capable of sourcing/sinking ≥16 mA and swinging rail-to-rail into 100 kΩ. |
| 2, 6, 9, 13 | –IN A–D | Inverting inputs; designed for guard-ring routing to suppress surface leakage in >100 GΩ impedance circuits. |
| 3, 5, 10, 12 | +IN A–D | Noninverting inputs; accept common-mode voltages from ground to (V+) – 2.3 V with minimal CMRR degradation. |
| 4 | V+ | Positive supply terminal; supports 4.5 V to 15 V single supply or ±2.25 V to ±7.75 V dual supply operation. |
| 11 | V– | Negative supply terminal; tied to ground in single-supply mode; must be decoupled with 0.1 µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical - eliminates voltage error across high-value feedback resistors (>1 GΩ) used in electrometer-grade circuits. |
| Rail-to-rail output stage | No external pulldown required - simplifies single-supply design by eliminating need for level-shifting or bias networks. |
| Ground-sensing input | Input common-mode includes 0 V - enables direct connection to grounded sensors (e.g., thermocouples, pH probes) without level shifters. |
| Capacitive-load tolerance | Stable with ≥1 nF load when using recommended pull-up or feedback compensation - reduces need for output isolation resistors. |
| High input impedance | >10 TΩ - maintains signal integrity in high-Z transducer interfaces (e.g., piezoelectric accelerometers, ion-selective electrodes). |
Applications
| Portable pH Probe Buffer | Photodiode Preamp |
|---|---|
|
Use Scenario: Signal conditioning for glass-electrode pH sensors in handheld field meters requiring 0.01 pH resolution over 0–14 pH range. IC Role / Device Role / Timing Role: High-impedance unity-gain buffer isolating electrode (≥1 GΩ) from ADC input while rejecting common-mode noise. Use Value: 2 fA input bias current prevents polarization error; rail-to-rail output maximizes 3.3 V ADC utilization; 10 µA/channel extends battery life beyond 1 year. |
Use Scenario: Transimpedance amplification of nanoamp photocurrents from ambient-light or IR detectors in smoke alarms. IC Role / Device Role / Timing Role: Low-noise, low-drift transimpedance amplifier with guarded input traces to minimize dark-current-induced offset drift. Use Value: 12.5 fA/√Hz current noise ensures sub-nA detection threshold; 100 kHz GBW supports fast pulse response for flame flicker detection. |
| Piezoelectric Charge Amplifier | Battery Voltage Monitor |
|
Use Scenario: Integrating charge output from vibration sensors in predictive maintenance edge nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-leakage integrator using LMC6044IM's input stage to preserve charge integrity over integration periods >10 s. Use Value: 2 fA bias current limits integration drift to <1 µV/s; 10 µA total quiescent draw enables >5-year operation on CR2032. |
Use Scenario: Precision monitoring of Li-ion cell voltage during deep-sleep states in IoT asset trackers. IC Role / Device Role / Timing Role: High-accuracy differential amplifier measuring cell voltage against reference, rejecting pack-level common-mode ripple. Use Value: 1.3 µV/°C offset drift ensures <1 mV error over –20°C to +70°C; 65 µA total IQ minimizes self-discharge impact on battery longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, low-input-current op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher input bias current (1 pA vs 2 fA), 125 µA/channel IQ, 2.2 MHz GBW | Better AC performance but unsuitable for femtoamp-level charge integration or >1 GΩ feedback designs | Select LMC6044IM when input leakage dominates error budget; choose TLV2464IDR only if bandwidth >100 kHz is required. |
| LTC1052CN#PBF | Zero-drift architecture, 50 pA max IB, 120 µA IQ, 1.5 MHz GBW, chopper-stabilized | Lower offset drift (0.01 µV/°C) but higher noise floor and EMI sensitivity due to chopping frequency | Prefer LMC6044IM for ultra-high-Z, low-noise DC applications; LTC1052 suits precision DC offsets where drift is primary concern. |
Compared with TLV2464IDR and LTC1052CN#PBF, the LMC6044IM uniquely balances femtoamp input current, rail-to-rail output, and micropower operation - making it irreplaceable in battery-powered, high-impedance sensor front-ends where leakage, not offset or noise, defines system accuracy.
Availability
LMC6044IM is available at Aetrix Electronics and suitable for portable analytical instruments, fire/smoke-detection systems, and battery-powered transducer interfaces requiring stable component supply across extended production lifecycles.
Supply support for LMC6044IM 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMC604x family was designed specifically for ultra-low-power, high-input-impedance signal conditioning in portable and remote sensing applications - emphasizing femtoamp input leakage control, single-supply rail-to-rail operation, and robustness in high-humidity environments.
FAQ
What is the maximum operating supply voltage for LMC6044IM?
The LMC6044IM supports a maximum supply voltage of 16 V absolute rating, with recommended operation from 4.5 V to 15.5 V single supply. Exceeding 15.5 V may degrade long-term reliability, especially under elevated temperature conditions. The LMC6044IM datasheet specifies 15 V as the upper limit for continuous operation to ensure specified electrical characteristics and thermal safety margins.
Does LMC6044IM support true rail-to-rail input common-mode range?
No - the LMC6044IM input common-mode range extends to ground and up to (V+) – 2.3 V at room temperature (worse at temperature extremes). It does not include the positive rail. However, its output is truly rail-to-rail, swinging within 30 mV of both V+ and V– under 100 kΩ load. This asymmetry makes the LMC6044IM ideal for ground-referenced sensors but requires careful biasing for signals near V+.
Can LMC6044IM drive capacitive loads directly without external compensation?
The LMC6044IM is not unconditionally stable with large capacitive loads. Driving >100 pF directly risks oscillation. Stable operation with ≥1 nF loads requires external compensation - either a pull-up resistor to V+ (≥10 µA current) or a feedback capacitor (CF) placed across the feedback resistor to counteract input capacitance phase lag, as documented in TI's SNOS611F datasheet Section 6.1.3.
What is the guaranteed input bias current specification for LMC6044IM over temperature?
The LMC6044IM guarantees input bias current ≤ ±4 pA over the full –40°C to +85°C operating range. At 25°C, typical performance is 2 fA, but the datasheet specifies ±4 pA maximum across temperature - a critical parameter for charge-amplifier and high-impedance integrator designs where leakage-induced drift must be bounded.
Is LMC6044IM pin-compatible with other LMC604x variants?
No - the LMC6044IM (quad, 14-pin SOIC) is not pin-compatible with LMC6041 (single, 8-pin) or LMC6042 (dual, 8-pin). Pin assignments differ significantly: LMC6044IM uses pins 1/7/8/14 for outputs and pins 2/6/9/13 for inverting inputs, whereas LMC6042 assigns outputs to pins 1/7 and inverting inputs to pins 2/6. Board redesign is required when substituting between LMC604x variants.
LMC6044IM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- 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 FAQ
1.How can I place an order for LMC6044IM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044IM 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 reliable?
The price and inventory of LMC6044IM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044IM is usually 5 days.
3.What payment methods are accepted for LMC6044IM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044IM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044IM?
LMC6044IM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044IM 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?
For technical support, including LMC6044IM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044IM requirements.
6.How does Aetrix verify that LMC6044IM is sourced from the original manufacturer or authorized distributors?
All LMC6044IM 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 meets industry standards.
7.What is the process for return or replacement of LMC6044IM?
All LMC6044IM units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044IM, 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 part is unused and in its original packaging.
Return procedure for LMC6044IM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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