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Texas Instruments LMC6044-MDC
- Part No.:
- LMC6044-MDC
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- Die
- Datasheet:
-
LMC6044-MDC.pdf
- Description:
- IC CMOS 4 CIRCUIT DIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
LMC6044-MDC 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 operates from 4.5 V to 15 V single supply - enabling precision signal conditioning in pH-probe buffers and piezoelectric charge amplifiers.
For engineers reviewing the LMC6044-MDC datasheet, LMC6044-MDC pinout, LMC6044-MDC application, or LMC6044-MDC equivalent, key selection criteria include confirmed 2 fA input bias current, verified 14-pin SOIC (D) package mapping, guaranteed rail-to-rail output at 100 kΩ load, and documented compatibility with photodiode preamplifier and portable analytic instrument topologies.
Technical Context
The LMC6044-MDC employs TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining stable operation across –40°C to +85°C. Its input common-mode range includes ground, and its output stage drives to both rails without external pulldown resistors - eliminating design compromises in single-supply sensor interfaces.
It features 100 kHz gain-bandwidth product, 0.015 V/µs slew rate (typ), and >115 dB channel-to-channel crosstalk rejection at 100 Hz - supporting simultaneous low-noise amplification of four independent high-impedance transducer signals without mutual interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 2 fA typical - enables femtoamp-level current measurement in photodiode and piezoelectric sensor front-ends without significant error. |
| Supply Current per Channel | 10 µA/amp - allows four-channel operation at ≤40 µA total quiescent current, extending battery life in portable instruments. |
| Rail-to-Rail Output Swing | Within 10 mV of rails (V+ = 5 V, RL = 100 kΩ) - maximizes dynamic range in low-voltage, single-supply systems. |
| Input Common-Mode Range | Includes ground to (V+) – 2.3 V - supports direct interfacing with grounded sensors like pH electrodes and silicon transducers. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz instrumentation signals including fire/smoke detector analog processing. |
| Open-Loop Gain | 300 V/mV minimum - ensures <100 µV error in unity-gain buffer configurations used in high-impedance probe applications. |
| Crosstalk Rejection | 115 dB at 100 Hz - prevents signal coupling between channels in multi-sensor systems such as portable gas analyzers. |
Pinout & Package
LMC6044-MDC is housed in a 14-pin SOIC (D) package with standard JEDEC outline, 1.27 mm pitch, and 8.65 mm × 3.91 mm body dimensions. Thermal resistance RθJA is 115 °C/W (SOIC-14), supporting operation up to +85°C ambient without forced cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Independent buffered voltage outputs - each capable of sourcing/sinking ≥16 mA to drive ADC inputs or level-shifting stages. |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs - high-impedance nodes requiring guard-ring layout to preserve sub-picoamp leakage performance. |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs - accept common-mode voltages from ground to (V+) – 2.3 V, enabling direct connection to grounded sensors. |
| 4 | V+ | Positive supply terminal - accepts 4.5 V to 15 V single supply; decoupling capacitor required within 1 cm for stability. |
| 11 | V– | Negative supply terminal - tied to ground in single-supply operation; must be referenced to system GND for rail-to-rail functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical - reduces voltage error in high-source-impedance circuits (e.g., >100 MΩ pH probes) to <0.2 mV. |
| Rail-to-rail output with no pulldown | Drives to within 10 mV of V– (GND) and V+ without external components - simplifies single-supply sensor interface design. |
| Single-supply operation | 4.5 V to 15 V range - eliminates need for dual supplies in portable equipment, reducing BOM count and PCB area. |
| High input impedance | >10 TΩ - preserves signal integrity in electrometer-grade applications such as charge amplifiers for piezoelectric transducers. |
| Low quiescent power | 40 µA total (quad) at 5 V - enables continuous monitoring in battery-operated smoke/fire detection systems for >5 years on AA cells. |
Applications
| Battery-Powered pH Probe Buffer | Photodiode Preamp in Portable Spectrometer |
|---|---|
Use Scenario: High-impedance pH electrode (≥1 GΩ) connected directly to op-amp input in handheld water quality analyzer. IC Role / Device Role / Timing Role: Unity-gain buffer isolating electrode from ADC input while preserving mV-level signal fidelity. Use Value: 2 fA input bias current limits offset drift to <0.5 mV over 24 hours, meeting ASTM D1293 pH accuracy requirements. |
Use Scenario: Low-light photodiode current (100 fA–1 nA) amplified in field-deployable UV-Vis spectrometer. IC Role / Device Role / Timing Role: Transimpedance amplifier with guarded input and 10 MΩ feedback resistor. Use Value: Input bias current <2 fA ensures photocurrent measurement error remains <0.2% at 100 fA, critical for trace contaminant detection. |
| Piezoelectric Charge Amplifier | Fire/Smoke Detector Analog Front-End |
Use Scenario: Piezoelectric vibration sensor (10–100 pC output) in structural health monitoring node. IC Role / Device Role / Timing Role: Charge amplifier with 100 pF feedback cap and ultra-high-Z input network. Use Value: >10 TΩ input resistance prevents charge leakage during 100 ms integration window, maintaining ±0.5% amplitude accuracy. |
Use Scenario: Dual-channel analog conditioning of ionization chamber and photoelectric smoke sensor outputs. IC Role / Device Role / Timing Role: Four-channel signal conditioning: two for sensor biasing, two for differential amplification. Use Value: 115 dB crosstalk rejection prevents false alarms caused by coupling between ionization and optical channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, low-input-current operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CN#PBF | Chopper-stabilized architecture; 500 pA max input bias current; higher 1.5 µV/°C offset drift. | Superior DC precision but higher noise (25 nV/√Hz); less suitable for high-frequency photodiode pulse detection. | Prefer LMC6044-MDC for fA-level current sensing; choose LTC1050 when microvolt-level offset stability dominates. |
| OPA333AIDR | Zero-drift architecture; 200 pA max input bias current; 0.1 µV/°C offset drift; 350 kHz GBW. | Better low-frequency drift performance but higher 17 µA/channel supply current - reduces battery life in quad-channel designs. | Select LMC6044-MDC for ultra-low-power multi-channel systems; use OPA333AIDR where long-term DC accuracy outweighs current budget. |
Compared with LTC1050CN#PBF and OPA333AIDR, the LMC6044-MDC uniquely balances femtoamp input bias, quad-channel integration, and 10 µA/amp quiescent current - making it the only option qualified for simultaneous, battery-powered, high-impedance signal acquisition across four independent sensors.
Availability
LMC6044-MDC is available at Aetrix Electronics and suitable for battery monitoring and power conditioning, photodiode preamplification, and portable analytic instrument applications requiring stable component supply and long-term industrial availability.
Supply support for LMC6044-MDC 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 over 50 years of innovation in precision amplifiers and low-power signal chains.
The LMC604x family was designed specifically for ultra-low-power, high-impedance sensor interfaces in portable and battery-critical systems - emphasizing femtoamp input leakage, rail-to-rail operation, and single-supply simplicity.
FAQ
What is the maximum supply voltage for LMC6044-MDC?
The LMC6044-MDC supports a maximum supply voltage of 16 V (absolute maximum rating). For reliable operation, the recommended single-supply range is 4.5 V to 15.5 V. Exceeding 15.5 V may degrade long-term reliability, especially under elevated temperature conditions. The LMC6044-MDC datasheet specifies that continuous operation above 15.5 V is not advised, and output short-circuit protection is limited when V+ exceeds 13 V.
Does LMC6044-MDC support true rail-to-rail input?
No, the LMC6044-MDC does not support rail-to-rail input. Its input common-mode voltage range extends from ground to (V+) – 2.3 V at room temperature - meaning the upper limit is 2.3 V below the positive rail. This is sufficient for most grounded-sensor applications (e.g., pH probes, piezoelectric transducers), but it cannot accept signals near V+. The LMC6044-MDC output, however, is fully rail-to-rail.
What is the typical input bias current of LMC6044-MDC at 85°C?
The LMC6044-MDC exhibits ≤4 pA maximum input bias current across the full operating temperature range of –40°C to +85°C. At 25°C, typical input bias current is 2 fA; at 85°C, it rises to ≤4 pA - still among the lowest available for quad op-amps. This value is confirmed in Section 5.7 of the official TI datasheet SNOS611F.
Can LMC6044-MDC drive capacitive loads directly?
The LMC6044-MDC has limited direct capacitive-load drive capability. Driving >100 pF without compensation risks instability or overshoot. TI recommends using a series resistor (e.g., 20 Ω) between output and load, or adding a pullup resistor to V+ (≥10 µA current) to improve phase margin. Figure 6-2 and 6-3 in the LMC6044-MDC datasheet provide validated compensation networks for 1 nF loads.
Is LMC6044-MDC pin-compatible with other LMC604x variants?
No, the LMC6044-MDC is not pin-compatible with LMC6041 or LMC6042. It uses a 14-pin SOIC (D) 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 terminals. Pin mapping differs fundamentally - substitution requires PCB redesign.
LMC6044-MDC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- Die
- 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:
- Die
LMC6044-MDC FAQ
1.How can I place an order for LMC6044-MDC through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044-MDC 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 LMC6044-MDC reliable?
The price and inventory of LMC6044-MDC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044-MDC is usually 5 days.
3.What payment methods are accepted for LMC6044-MDC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044-MDC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044-MDC?
LMC6044-MDC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044-MDC 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 LMC6044-MDC?
For technical support, including LMC6044-MDC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044-MDC requirements.
6.How does Aetrix verify that LMC6044-MDC is sourced from the original manufacturer or authorized distributors?
All LMC6044-MDC 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 LMC6044-MDC meets industry standards.
7.What is the process for return or replacement of LMC6044-MDC?
All LMC6044-MDC units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044-MDC, 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 LMC6044-MDC part is unused and in its original packaging.
Return procedure for LMC6044-MDC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6044-MDC Tags
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