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Texas Instruments LMC6044AIMX/NOPB
- Part No.:
- LMC6044AIMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6044AIMX/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,597
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Product details
Overview
LMC6044AIMX/NOPB from Texas Instruments is a quad-channel CMOS micropower 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 LMC6044AIMX/NOPB datasheet, LMC6044AIMX/NOPB pinout, LMC6044AIMX/NOPB application, or LMC6044AIMX/NOPB equivalent, key selection criteria include confirmed 2 fA input bias current, verified 100 kHz gain-bandwidth product, documented rail-to-rail output drive into 25 kΩ, validated −40°C to +85°C operating range, and SOIC-14 package compatibility with high-impedance PCB layout requirements.
Technical Context
The LMC6044AIMX/NOPB uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining stability across capacitive loads and wide supply ranges. Its architecture supports true rail-to-rail output swing without external pulldown resistors and includes ground-referenced input common-mode range - critical for single-supply sensor interfaces.
It features internal compensation optimized for micropower operation, delivering 100 kHz GBW and 0.015 V/µs slew rate (typical) while sustaining >115 dB channel-to-channel crosstalk rejection. Input resistance exceeds 10 TΩ, and PSRR exceeds 75 dB (positive rail) and 94 dB (negative rail) under specified conditions.
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 - allows four independent amplifiers to operate on <65 µA total, ideal for multi-sensor battery nodes. |
| Output Swing | Rail-to-rail: 0.004 V above V− and 4.97 V below V+ at 5 V supply - preserves full dynamic range in low-voltage analog front-ends. |
| Gain-Bandwidth Product | 100 kHz - supports stable DC-coupled amplification up to ~10 kHz with unity-gain stability into 100 pF. |
| Input Common-Mode Range | Includes ground (0 V) to (V+) − 1.9 V - permits direct interfacing with grounded transducers like pH electrodes and thermistors. |
| CMRR | 75 dB minimum - ensures accurate differential signal extraction in noisy industrial environments with common-mode interference. |
| Quiescent Current (Total) | 40–65 µA at 5 V - enables >1-year operation on coin-cell batteries in portable analyzers and smoke detectors. |
Pinout & Package
LMC6044AIMX/NOPB is supplied in a 14-pin SOIC (D package) with standard JEDEC outline, 1.27 mm pitch, and 8.65 mm × 3.91 mm body size. Thermal resistance RθJA = 115 °C/W (SOIC-14).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A, OUT B, OUT C, OUT D | Independent buffered voltage outputs - each capable of sourcing/sinking ≥16 mA and swinging rail-to-rail. |
| 2, 6, 9, 13 | −IN A, −IN B, −IN C, −IN D | Inverting inputs - ultra-high impedance (>10 TΩ) and 2 fA leakage enable direct connection to high-Z sources. |
| 3, 5, 10, 12 | +IN A, +IN B, +IN C, +IN D | Noninverting inputs - accept common-mode voltages from ground to (V+) − 1.9 V, supporting single-supply sensor biasing. |
| 4 | V+ | Positive power supply terminal - accepts 4.5 V to 15 V single supply or ±2.25 V to ±7.75 V dual supply. |
| 11 | V− | Negative power supply terminal - tied to ground in single-supply mode; enables true ground-referenced input operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 30 mV of both supply rails at 15 V, preserving >99% of available voltage headroom for signal fidelity. |
| Ground-referenced input | Input common-mode range includes 0 V - eliminates need for level-shifting circuitry when interfacing grounded sensors. |
| Ultra-low power | 65 µA total quiescent current at 5 V enables four-channel operation on microamp-level battery budgets. |
| High channel isolation | 115 dB crosstalk rejection minimizes inter-channel interference in multi-channel instrumentation and data acquisition. |
| Capacitive-load tolerant | Stable with ≥100 pF load when using recommended feedback network - simplifies driving ADC input capacitors and long traces. |
Applications
| Battery-Powered pH Probe Buffer | Photodiode Preamp in Portable Analyzers |
|---|---|
Use Scenario: High-impedance glass electrode (≥1 GΩ) outputs mV-level signals sensitive to loading and leakage. IC Role / Device Role / Timing Role: Voltage follower buffer with ultra-low input bias current prevents electrode polarization and drift. Use Value: 2 fA input bias current reduces measurement error to <0.1 mV over 10 MΩ source impedance, enabling ±0.01 pH resolution. |
Use Scenario: Low-light detection in handheld spectrometers or environmental gas sensors using reverse-biased photodiodes. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with femtoamp input sensitivity and low noise. Use Value: 83 nV/√Hz input voltage noise and 12.5 fA/√Hz current noise preserve SNR in sub-nA photocurrent measurements. |
| Piezoelectric Charge Amplifier | Fire/Smoke Detector Signal Conditioning |
Use Scenario: High-impedance charge output from accelerometers or impact sensors requires integration without leakage-induced drift. IC Role / Device Role / Timing Role: Charge amplifier with ultra-high input resistance (>10 TΩ) and low offset drift (1.3 µV/°C). Use Value: Enables stable 100-second time constants with 1 nF feedback capacitor - critical for low-frequency vibration monitoring. |
Use Scenario: Ionization chamber or optical smoke sensor producing weak, high-impedance analog signals in life-safety equipment. IC Role / Device Role / Timing Role: Low-power signal conditioner amplifying µA-level currents while surviving 85°C ambient. Use Value: Guaranteed operation from −40°C to +85°C with <65 µA total supply current ensures reliability in enclosed detector housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CSW#PBF | Chopper-stabilized, 0.5 µV max offset, 1.2 µA supply current per channel, SO-16 package. | Superior DC accuracy but higher power; not rail-to-rail output - requires dual supply for ground-referenced inputs. | Choose LTC1050 for sub-µV offset-critical DC applications where power budget allows >1 µA/channel. |
| OPA333AIDR | Zero-drift, 0.1 µV/°C offset drift, 17 µA supply current, rail-to-rail I/O, SOIC-8 (dual only). | Higher power and dual-only configuration; lacks quad channel density and 2 fA input bias current. | Choose OPA333 for precision DC gain stages where chopper noise is unacceptable and quad density is not required. |
Compared with LTC1050CSW#PBF and OPA333AIDR, LMC6044AIMX/NOPB uniquely combines femtoamp input bias, quad-channel SOIC-14 packaging, rail-to-rail output, and <65 µA total quiescent current - making it irreplaceable for multi-sensor, battery-operated, high-impedance signal chains.
Availability
LMC6044AIMX/NOPB is available at Aetrix Electronics and suitable for battery monitoring, portable analytical instruments, and fire/smoke detection systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMC6044AIMX/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 conditioning.
The LMC604x family was designed specifically for ultra-low-power, high-impedance sensor interface applications - including pH probes, piezoelectric transducers, and portable medical/analytics equipment - where femtoamp input leakage and rail-to-rail operation are mandatory.
FAQ
What is the maximum supply voltage for LMC6044AIMX/NOPB?
The absolute maximum supply voltage for LMC6044AIMX/NOPB is 16 V, but the recommended operating range is 4.5 V to 15.5 V for single-supply operation. Exceeding 15.5 V risks reliability degradation, especially when output is shorted to V+. The device supports dual-supply operation from ±2.25 V to ±7.75 V, with thermal derating required above 85°C ambient.
Does LMC6044AIMX/NOPB support true rail-to-rail input common-mode range?
LMC6044AIMX/NOPB does not support rail-to-rail input common-mode range. Its input common-mode voltage extends from ground (0 V) to (V+) − 1.9 V at room temperature - sufficient to include ground and accommodate most single-supply sensor interfaces, but not reaching the positive rail. This design enables robust operation with grounded transducers while maintaining ultra-low input bias current.
Can LMC6044AIMX/NOPB drive capacitive loads directly?
LMC6044AIMX/NOPB is not unconditionally stable into large capacitive loads. It can drive ≤100 pF directly with adequate phase margin, but larger loads require external compensation - such as a series resistor between output and load, or a pullup resistor to V+ (≥10 µA current). Figure 6-2 and 6-3 in the TI datasheet provide validated compensation networks for 1 nF and higher loads.
What is the guaranteed input bias current specification for LMC6044AIMX/NOPB over temperature?
The guaranteed input bias current for LMC6044AIMX/NOPB is ±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 max across temperature - a critical parameter for charge amplifier and electrometer designs where leakage-induced drift must be bounded.
Is LMC6044AIMX/NOPB pin-compatible with other LMC604x variants?
No, LMC6044AIMX/NOPB is not pin-compatible with LMC6041 or LMC6042. It uses a 14-pin SOIC package with dedicated pins for four independent amplifier channels (OUT A/B/C/D, ±IN A/B/C/D, +IN A/B/C/D, V+, V−), whereas LMC6041 (8-pin) and LMC6042 (8-pin) have fewer channels and different pin assignments. Board redesign is required when substituting between LMC604x variants.
LMC6044AIMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
LMC6044AIMX/NOPB FAQ
1.How can I place an order for LMC6044AIMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044AIMX/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 LMC6044AIMX/NOPB reliable?
The price and inventory of LMC6044AIMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044AIMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6044AIMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044AIMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044AIMX/NOPB?
LMC6044AIMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044AIMX/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 LMC6044AIMX/NOPB?
For technical support, including LMC6044AIMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044AIMX/NOPB requirements.
6.How does Aetrix verify that LMC6044AIMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6044AIMX/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 LMC6044AIMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6044AIMX/NOPB?
All LMC6044AIMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044AIMX/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 LMC6044AIMX/NOPB part is unused and in its original packaging.
Return procedure for LMC6044AIMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6044AIMX/NOPB Tags
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