My Inquiry
My Account
Texas Instruments LMC6044AIM
- Part No.:
- LMC6044AIM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6044AIM.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMC6044AIM 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 13 mV of rails at VS = 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 LMC6044AIM datasheet, LMC6044AIM pinout, LMC6044AIM application, or LMC6044AIM equivalent, this page provides verified specifications, SOIC-14 package layout, real-world use cases in portable instrumentation and transducer interfaces, and validated alternative options for low-power analog front-end design.
Technical Context
The LMC6044AIM uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining rail-to-rail output drive without external pulldown resistors. Its input common-mode range includes ground, supporting true single-supply operation in sensor interfaces where negative rail generation is impractical.
It features 100 kHz gain-bandwidth product, 0.015 V/µs slew rate (typ), and >115 dB channel-to-channel crosstalk rejection - enabling stable, low-noise amplification of high-impedance sources such as piezoelectric transducers and silicon-based pressure sensors without signal coupling between channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 15 V single supply - eliminates need for dual-rail power in portable analyzers and smoke detectors. |
| Input bias current | 2 fA typical - preserves signal integrity from high-Z sources like pH electrodes and photodiodes without loading error. |
| Quiescent current | 65 µA total (4 channels) at 5 V - enables multi-channel sensing in battery-operated devices with >1-year runtime. |
| Output swing | Rail-to-rail: 0.004 V to 4.987 V at VS = 5 V, RL = 100 kΩ - maximizes dynamic range in 5 V microcontroller ADC interfaces. |
| Gain-bandwidth | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., fire-detection transducers, portable EMG). |
| Input impedance | >10 TΩ - prevents attenuation in charge-amplifier configurations for piezoelectric accelerometers. |
| CMRR | 75 dB (typ) - rejects common-mode noise in unshielded industrial sensor wiring without active guarding. |
Pinout & Package
LMC6044AIM is housed in a 14-pin SOIC (D package) with standard JEDEC outline and 1.27 mm pitch. Thermal resistance RθJA = 115 °C/W enables operation up to +85 °C ambient without forced cooling in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Amplified outputs for four independent channels - each capable of sourcing/sinking ≥16 mA into 100 kΩ loads. |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs - matched for instrumentation amplifier topologies; require guard rings when Zin > 1 GΩ. |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs - accept common-mode voltages down to 0 V, enabling direct connection to grounded sensors. |
| 4 | V+ | Positive supply rail - must be decoupled with ≥0.1 µF ceramic capacitor placed ≤5 mm from pin. |
| 11 | V– | Negative supply rail (ground in single-supply mode) - serves as reference for all input/output stages. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 13 mV of V+ and 4 mV of V− at 5 V supply - eliminates level-shifting circuitry in 3.3 V/5 V MCU systems. |
| Input common-mode includes ground | Operates with VCM = 0 V - supports direct interfacing to grounded thermistors, RTDs, and bridge transducers. |
| Ultra-low input leakage | 2 fA typical bias current - reduces offset drift in charge amplifiers used with piezoelectric vibration sensors. |
| No latch-up susceptibility | CMOS process ensures immunity to input overvoltage-induced latch-up - critical in field-deployed smoke/fire detectors. |
| High channel isolation | >115 dB crosstalk at 100 Hz - enables simultaneous multi-sensor acquisition (e.g., CO + smoke + heat) without inter-channel interference. |
Applications
| pH-Probe Buffer Amplifier | Photodiode Preamplifier |
|---|---|
Use Scenario: High-impedance glass electrode (≥1 GΩ) in portable handheld pH meters measures millivolt-level Nernst potentials across varying temperature and electrolyte conditions. IC Role / Device Role / Timing Role: Voltage follower buffer isolating electrode from ADC input; provides unity gain, zero-phase shift, and minimal loading error. Use Value: 2 fA input bias current limits measurement error to <0.1 mV at 25 °C - meeting ASTM D1293 accuracy requirements for field water testing. |
Use Scenario: Reverse-biased silicon photodiode in portable spectrophotometer generates picoamp-level photocurrent under low-light LED excitation. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage; configured with 10 MΩ feedback resistor and guarded input trace. Use Value: 10 µA/amp quiescent current enables continuous 24-hour spectral scanning on two AA batteries; rail-to-rail output drives 12-bit SAR ADC directly. |
| Piezoelectric Charge Amplifier | Battery Monitoring Circuit |
Use Scenario: Piezoelectric accelerometer in predictive maintenance sensor node detects mechanical shock events on rotating machinery. IC Role / Device Role / Timing Role: Charge amplifier integrating high-impedance charge output into proportional voltage; uses LMC6044AIM Channel A for integration and Channel B for filtering. Use Value: >10 TΩ input resistance prevents charge leakage during 100 ms integration window - preserving amplitude fidelity of transient impacts. |
Use Scenario: Four-cell Li-ion pack in medical infusion pump requires per-cell voltage monitoring with <±1 mV accuracy and <1 µA standby current per channel. IC Role / Device Role / Timing Role: Precision voltage divider buffer feeding MCU ADC; four channels monitor Vcell1–Vcell4 simultaneously. Use Value: 65 µA total quiescent current extends pump standby time to >30 days; rail-to-rail output ensures full 0–4.2 V range maps to ADC's 0–3.3 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher input bias current (1 pA typ), 250 µA/amp IQ, 6.4 MHz GBW - trades ultra-low leakage for speed and drive strength. | Better suited for higher-frequency sensor interfaces (e.g., ultrasonic transducers) but unsuitable for pH or piezo charge integration. | Select TLV2464IDR only when bandwidth >100 kHz and output drive >25 mA are required; avoid for sub-pA leakage-critical designs. |
| OPA4340UA | 25 µA/amp IQ, 1 pA input bias, rail-to-rail I/O, 5.5 MHz GBW - lower power than TLV2464 but still 12× higher IB than LMC6044AIM. | Acceptable for photodiode preamps with moderate light levels; cannot replace LMC6044AIM in femtoamp-level applications like electrophysiology. | Choose OPA4340UA for cost-sensitive, medium-precision portable instruments where 1 pA leakage is tolerable and faster settling is needed. |
Compared with TLV2464IDR and OPA4340UA, LMC6044AIM uniquely delivers femtoamp input bias with micropower consumption - making it irreplaceable in pH probes, piezoelectric charge amplifiers, and long-life battery monitors where leakage-induced drift dominates error budgets.
Availability
LMC6044AIM is available at Aetrix Electronics and suitable for battery monitoring, portable analytical instruments, and fire/smoke detection systems requiring stable component supply across extended production lifecycles.
Supply support for LMC6044AIM 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 interfaces in portable and battery-constrained equipment - emphasizing input leakage minimization, rail-to-rail operation, and single-supply usability.
FAQ
What is the maximum operating temperature for LMC6044AIM?
The LMC6044AIM is specified for operation from –40 °C to +85 °C ambient temperature. Its SOIC-14 package has a junction-to-ambient thermal resistance of 115 °C/W, allowing reliable function at full rated load within this range when PCB copper area meets minimum layout guidelines. The device's electrical characteristics, including input offset voltage drift (1.3 µV/°C), are guaranteed across this interval.
Does LMC6044AIM support dual-supply operation?
Yes, LMC6044AIM supports dual-supply operation with ±2.25 V to ±7.75 V rails, as confirmed in Section 5.3 of the SNOS611F datasheet. This configuration enables symmetric signal handling in AC-coupled applications like audio preamps or differential sensor interfaces, while retaining rail-to-rail output swing and 2 fA input bias current performance.
Can LMC6044AIM drive capacitive loads directly?
LMC6044AIM exhibits limited direct capacitive-load tolerance due to its micropower compensation. Driving >100 pF loads may cause instability or ringing. TI recommends using the pullup-resistor method (Figure 6-3) or series-R + shunt-C compensation (Figure 6-2) - both validated in the LMC6044AIM datasheet - to maintain stability with loads up to 1 nF in instrumentation amplifier configurations.
Is LMC6044AIM pin-compatible with other LMC604x variants?
No - LMC6044AIM (14-pin SOIC) is not pin-compatible with LMC6041AIM (8-pin SOIC) or LMC6042AIM (8-pin SOIC). Pin mapping differs fundamentally: LMC6044AIM dedicates pins 1/7/8/14 to outputs and 2/6/9/13 to inverting inputs, whereas dual/single variants consolidate channels into fewer pins. Board redesign is required when substituting across channel counts.
What is the typical input offset voltage for LMC6044AIM?
The typical input offset voltage for LMC6044AIM is ±1 mV at 25 °C, with a maximum of ±3.3 mV over the full –40 °C to +85 °C operating range. This value applies to the "AI" grade (industrial temperature range) and is measured under standard conditions: VS = 5 V, VCM = 1.5 V, and RL = 1 MΩ. Offset drift is specified at 1.3 µV/°C, enabling predictable calibration in temperature-varying environments.
LMC6044AIM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for LMC6044AIM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044AIM 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 reliable?
The price and inventory of LMC6044AIM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044AIM is usually 5 days.
3.What payment methods are accepted for LMC6044AIM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044AIM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044AIM?
LMC6044AIM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044AIM 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?
For technical support, including LMC6044AIM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044AIM requirements.
6.How does Aetrix verify that LMC6044AIM is sourced from the original manufacturer or authorized distributors?
All LMC6044AIM 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 meets industry standards.
7.What is the process for return or replacement of LMC6044AIM?
All LMC6044AIM units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044AIM, 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 part is unused and in its original packaging.
Return procedure for LMC6044AIM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6044AIM Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
