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Texas Instruments LMC6044IN/NOPB
- Part No.:
- LMC6044IN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC6044IN/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
LMC6044IN/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 100 kΩ load), 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 LMC6044IN/NOPB datasheet, LMC6044IN/NOPB pinout, LMC6044IN/NOPB application, or LMC6044IN/NOPB equivalent, key selection criteria include confirmed 2 fA input bias current, quad-channel SOIC-14 packaging, rail-to-rail output capability under 100 kΩ load, −40°C to +85°C operating temperature range, and compatibility with high-impedance transducer interfaces requiring no external pulldown resistors.
Technical Context
The LMC6044IN/NOPB uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining insensitivity to latch-up and stable operation into capacitive loads. Its architecture supports true rail-to-rail output swing without external pulldown components and includes ground-referenced input common-mode range (down to V−).
It features 100 kHz gain-bandwidth product, 0.02 V/µs slew rate (typical), >10 TΩ input resistance, and 115 dB channel-to-channel crosstalk rejection at 100 Hz - making it suitable for multi-channel, low-noise, high-impedance analog front-ends where power and leakage are critical constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 15 V single supply - enables direct integration into 5 V or 12 V battery-backed sensor nodes without regulation. |
| Input bias current | 2 fA typical - preserves signal integrity in picoamp-level current sources like photodiodes and piezoelectric sensors. |
| Quiescent current | 65 µA total (typical at 5 V) - supports >1-year operation on coin-cell batteries in portable instrumentation. |
| Output swing | Rail-to-rail: 0.03 V above V− and 0.013 V below V+ at 100 kΩ load - maximizes dynamic range in single-supply data acquisition. |
| Gain-bandwidth | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., pH, thermopile, IR detector outputs). |
| Input common-mode range | Includes V− (ground) up to (V+) − 1.9 V - allows direct interfacing to grounded transducers without level-shifting. |
| CMRR | 75 dB (typical) - rejects noise in high-impedance, unshielded sensor wiring common in field-deployed analyzers. |
Pinout & Package
LMC6044IN/NOPB is housed in a 14-pin plastic dual in-line package (PDIP), with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplified output of channel A - drives downstream ADC input or buffer stage with rail-to-rail swing. |
| 2 | −IN A | Inverting input of channel A - connects to feedback network in transimpedance or difference amplifier configurations. |
| 3 | +IN A | Noninverting input of channel A - interfaces directly to high-impedance sources (e.g., pH electrode, thermocouple). |
| 4 | V+ | Positive supply rail - must be decoupled with ≥0.1 µF ceramic capacitor near pin for stability. |
| 5 | +IN B | Noninverting input of channel B - enables independent signal conditioning for dual-sensor systems. |
| 6 | −IN B | Inverting input of channel B - used in matched pair configurations for differential sensing or instrumentation amplifiers. |
| 7 | OUT B | Amplified output of channel B - shares same electrical specs as OUT A; crosstalk < −115 dB at 100 Hz. |
| 8 | OUT C | Amplified output of channel C - supports three-channel simultaneous sampling in portable multimeters or gas analyzers. |
| 9 | −IN C | Inverting input of channel C - routed with guard ring to maintain <10 fA leakage in PCB layout. |
| 10 | +IN C | Noninverting input of channel C - referenced to same ground plane as all inputs to minimize common-mode error. |
| 11 | V− | Negative supply rail (typically ground in single-supply use) - serves as reference for input common-mode and output swing. |
| 12 | +IN D | Noninverting input of channel D - enables fourth independent channel for reference buffering or calibration path. |
| 13 | −IN D | Inverting input of channel D - used in active filtering or precision summing applications with matched resistor networks. |
| 14 | OUT D | Amplified output of channel D - fully specified for rail-to-rail swing and 100 kΩ load drive per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives to within 30 mV of V+ and V− at 100 kΩ load - eliminates need for negative supply or external pulldown resistors in single-supply designs. |
| Ultra-low input bias current | 2 fA typical - ensures <0.1 mV error from 1 GΩ source impedance, critical for pH probes and piezoelectric charge amplifiers. |
| Single-supply operation | 4.5 V to 15 V range with input common-mode including ground - simplifies power architecture in portable medical and environmental sensors. |
| Quad-channel integration | Four fully independent op-amps in one PDIP-14 package - reduces board space and component count in multi-sensor data loggers. |
| High input impedance | >10 TΩ input resistance - minimizes loading of high-Z sources such as glass electrodes and electrochemical cells. |
| Low quiescent power | 65 µA total supply current (typical) - extends battery life in always-on smoke detectors and handheld diagnostic tools. |
Applications
| Battery-Powered pH Probe Buffer | Photodiode Pre-amplifier |
|---|---|
|
Use Scenario: Signal conditioning for glass pH electrodes in portable water quality meters, where electrode output is high-impedance (≥1 GΩ) and microamp-level currents must be preserved. IC Role / Device Role / Timing Role: Noninverting buffer amplifier with unity gain, providing high-impedance input and rail-to-rail output to drive 12-bit SAR ADC reference range. Use Value: 2 fA input bias current prevents >10 mV offset drift over time; rail-to-rail swing maximizes usable ADC code range from 0–5 V supply. |
Use Scenario: Converting nanoamp photocurrent from silicon photodiodes in portable spectrophotometers or pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 10 MΩ feedback resistor, configured for DC–10 kHz bandwidth. Use Value: Ultra-low input current avoids signal corruption; 100 kHz GBW supports fast settling for LED-pulsed measurement cycles. |
| Piezoelectric Charge Amplifier | Fire/Smoke Detector Sensor Interface |
|
Use Scenario: Conditioning charge output from accelerometers or impact sensors in structural health monitoring units powered by energy harvesting. IC Role / Device Role / Timing Role: Inverting charge amplifier with high-value feedback capacitor (1 nF) and guarded input traces. Use Value: Input bias current <2 fA prevents capacitor discharge drift; quad configuration allows simultaneous triaxial vibration sensing. |
Use Scenario: Amplifying weak ionization current from smoke chamber electrodes in UL-listed residential fire alarms. IC Role / Device Role / Timing Role: Low-power, high-stability DC amplifier with guarded inputs and 100 kΩ feedback for current-to-voltage conversion. Use Value: 65 µA total supply current enables 10-year battery life; 75 dB CMRR rejects EMI from AC mains and switching regulators. |
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 |
|---|---|---|---|
| LMC6064IN/NOPB | Higher supply current (125 µA vs 65 µA), 1.5 MHz GBW, same 2 fA input bias and rail-to-rail output. | Better suited for higher-speed sensor interfaces (e.g., fast-response gas detectors) but increases battery load. | Select when bandwidth >100 kHz is required and power budget allows +60 µA per device. |
| TLC27L4CN | 10 pA input bias (vs 2 fA), 17 µA/amp supply current, 880 kHz GBW, same PDIP-14 package. | Acceptable for less sensitive applications (e.g., basic temperature sensing) but introduces ~100× more input error than LMC6044IN/NOPB. | Choose only if cost sensitivity outweighs leakage-critical performance; not recommended for pH or photodiode use. |
Compared with LMC6064IN/NOPB and TLC27L4CN, the LMC6044IN/NOPB uniquely balances femtoamp input bias, sub-100 µA total quiescent current, and quad-channel integration - making it the only option among the three qualified for long-life, high-impedance, single-supply portable instrumentation.
Availability
LMC6044IN/NOPB is available at Aetrix Electronics and suitable for battery monitoring and power conditioning, photodiode preamplification, and portable analytic instruments requiring stable component supply across extended production lifecycles.
Supply support for LMC6044IN/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-amp design and low-power signal conditioning ICs.
The LMC6044IN/NOPB belongs to TI's LMC604x family of micropower CMOS op-amps, engineered specifically for ultra-low-leakage, single-supply applications in portable instrumentation, environmental sensors, and safety-critical detection systems.
FAQ
What is the maximum operating temperature range for the LMC6044IN/NOPB?
The LMC6044IN/NOPB is specified for operation from −40°C to +85°C ambient temperature. This range is validated across all electrical parameters including input bias current, offset voltage drift, and output swing. The device uses TI's double-poly CMOS process to ensure stable performance across this full industrial temperature span without derating.
Does the LMC6044IN/NOPB require external pull-down resistors for rail-to-rail output operation?
No, the LMC6044IN/NOPB does not require external pull-down resistors. Its output stage is designed to swing to within 30 mV of V− (ground) under 100 kΩ load, even with no external components. This eliminates added leakage paths and simplifies PCB layout in high-impedance applications like pH probe buffers.
Can the LMC6044IN/NOPB drive a 10 nF capacitive load directly?
The LMC6044IN/NOPB is not characterized for direct 10 nF capacitive load driving. At that capacitance, phase margin degradation may cause oscillation. TI recommends using isolation resistors (e.g., 20 Ω in series with output) or a pull-up resistor to V+ (≥100 kΩ) to maintain stability - as detailed in Section 6.1.3 of the SNOS611F datasheet.
Is the LMC6044IN/NOPB pin-compatible with other LMC604x variants like LMC6042 or LMC6041?
No, the LMC6044IN/NOPB is not pin-compatible with LMC6041 or LMC6042. It uses a 14-pin PDIP package with four independent amplifier channels, whereas LMC6041 (8-pin) and LMC6042 (8-pin) contain one and two channels respectively. Pin functions and counts differ fundamentally - see Tables 4-1 through 4-3 in SNOS611F.
What is the typical input offset voltage for the LMC6044IN/NOPB at room temperature?
The typical input offset voltage for the LMC6044IN/NOPB is ±1 mV at TA = 25°C, with a maximum of ±3 mV across the full −40°C to +85°C range. This value applies to the "AI" grade (LMC6044AI), which corresponds to the LMC6044IN/NOPB part number per TI's ordering information in Section 9 of SNOS611F.
LMC6044IN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LMC6044IN/NOPB FAQ
1.How can I place an order for LMC6044IN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6044IN/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 LMC6044IN/NOPB reliable?
The price and inventory of LMC6044IN/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6044IN/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6044IN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6044IN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6044IN/NOPB?
LMC6044IN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6044IN/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 LMC6044IN/NOPB?
For technical support, including LMC6044IN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6044IN/NOPB requirements.
6.How does Aetrix verify that LMC6044IN/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6044IN/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 LMC6044IN/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6044IN/NOPB?
All LMC6044IN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6044IN/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 LMC6044IN/NOPB part is unused and in its original packaging.
Return procedure for LMC6044IN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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