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Texas Instruments LMC6042AIN/NOPB
- Part No.:
- LMC6042AIN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC6042AIN/NOPB.pdf
- Description:
- IC CMOS 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,528
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Product details
Overview
LMC6042AIN/NOPB from Texas Instruments is a dual CMOS micropower operational amplifier optimized for ultra-low-power, high-impedance signal conditioning. It delivers 2 fA typical input bias current, 10 μA/amp supply current, rail-to-rail output swing (to within 13 mV of V+ and 60 mV of V− at 5 V), and operates from 4.5 V to 15 V single supply - enabling use in battery-powered pH probe buffers and photodiode preamplifiers.
For engineers reviewing the LMC6042AIN/NOPB datasheet, LMC6042AIN/NOPB pinout, LMC6042AIN/NOPB application, or LMC6042AIN/NOPB equivalent, key selection criteria include verified 2 fA input bias current, guaranteed −40°C to +85°C operation, PDIP-8 package compatibility with legacy through-hole layouts, and confirmed suitability for transducer front-ends requiring >10 TΩ input resistance and sub-μA quiescent draw.
Technical Context
The LMC6042AIN/NOPB employs a direct-integrator output stage-bypassing conventional push-pull buffers-to achieve rail-to-rail swing while maintaining low output impedance and high open-loop gain (>300 V/mV). Its architecture eliminates need for external pull-down resistors in single-supply ground-swing applications.
It features feed-forward compensation for stability across wide load and supply conditions, supports capacitive load driving via external R/C networks (e.g., pull-up resistor ≥10 μA), and integrates guard-ring compatible input topology validated for <2 fA leakage in high-humidity PCB environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 2 fA typical - enables accurate measurement of picoamp-level currents from photodiodes or ion-selective electrodes without significant error. |
| Supply Current per Amplifier | 10 μA typical - allows two-channel operation under 20 μA total, supporting multi-year battery life in portable gas detectors or handheld analyzers. |
| Rail-to-Rail Output Swing | Swings to within 13 mV of V+ and 60 mV of V− at 5 V - preserves full dynamic range when interfacing with 5 V ADCs without level-shifting circuitry. |
| Input Common-Mode Range | Includes ground (−0.1 V min) and extends to V+−2.3 V - permits direct sensing of 0–5 V sensor outputs in single-supply systems. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC-coupled instrumentation amplifiers, pH probe buffering, and slow-varying transducer signals (e.g., pressure, temperature). |
| Input Resistance | >10 TΩ - prevents loading of high-impedance sources such as glass pH electrodes or piezoelectric charge sensors. |
| CMRR | 75 dB minimum (0–12 V common-mode) - ensures stable rejection of power supply ripple and shared-noise coupling in battery-monitoring circuits. |
Pinout & Package
LMC6042AIN/NOPB uses an 8-pin plastic dual in-line package (PDIP) with standard DIP footprint and 0.3-inch body width. Pin 1 is marked by a notch or dot; leads are tin-lead free (RoHS-compliant SN finish) and rated for 260°C soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential input; requires guarding to maintain <2 fA leakage in humid environments. |
| 2 | Non-Inverting Input (Amplifier A) | Ground-referenced or biased input for unity-gain buffer or inverting amplifier configurations. |
| 3 | Output (Amplifier A) | Rail-to-rail capable output; drives 100 kΩ loads to within 13 mV of rails at 5 V supply. |
| 4 | V− (Ground / Negative Supply) | Reference for single-supply operation; must be connected directly to system ground plane with low-inductance path. |
| 5 | Non-Inverting Input (Amplifier B) | Independent second channel input; identical electrical specs to Pin 2. |
| 6 | Inverting Input (Amplifier B) | Second channel inverting input; supports independent feedback network for dual-channel signal conditioning. |
| 7 | Output (Amplifier B) | Second rail-to-rail output; usable for differential output stages or independent sensor channels. |
| 8 | V+ (Positive Supply) | Accepts 4.5–15 V; internal ESD protection rated to 500 V HBM; decoupling capacitor (0.1 μF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical - enables femtoamp-level current measurement in electrometer-grade pH and ion-selective electrode interfaces. |
| Rail-to-rail output without pull-down resistors | Swings to within 60 mV of ground on single supply - eliminates need for external ground-referenced sinking components in battery-powered systems. |
| Input common-mode range including ground | Valid down to −0.1 V - supports direct connection of grounded transducers (e.g., thermocouples, RTDs) without level-shifting circuitry. |
| Stability with capacitive loads | Compensatable via external pull-up resistor (≥10 μA) or R/C feedback network - maintains phase margin when driving ADC input capacitance or long cables. |
| Guard-ring compatible layout support | Validated for foil guard rings held within 5 mV of inputs - reduces surface leakage to <0.05 pA even with 10¹¹ Ω board contamination. |
Applications
| pH Probe Buffer Amplifier | Photodiode Preamplifier |
|---|---|
Use Scenario: High-impedance glass electrode (≥1 GΩ) in portable water quality meters measures hydrogen ion activity with mV-level output. IC Role / Device Role / Timing Role: Unity-gain buffer isolating electrode from ADC input; rejects cable noise and preserves signal integrity over 1–10 m cable runs. Use Value: 2 fA input bias prevents >10 mV offset drift from electrode polarization; rail-to-rail swing maximizes 5 V ADC utilization without level shifters. |
Use Scenario: Reverse-biased silicon photodiode in smoke detector generates 1–100 pA photocurrent proportional to IR absorption. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage; operates continuously from coin cell for >5-year service life. Use Value: 10 μA/amp supply current enables dual-channel detection with <20 μA total draw; >10 TΩ input resistance avoids signal attenuation. |
| Battery Monitoring System | Silicon Transducer Interface |
Use Scenario: Precision voltage monitoring of Li-ion cell stacks in medical wearables, where leakage must not accelerate self-discharge. IC Role / Device Role / Timing Role: High-side voltage divider buffer feeding ADC; samples every 10 seconds during sleep mode. Use Value: Sub-μA quiescent draw extends battery life; input common-mode range including ground allows direct sensing of bottom-cell voltage relative to system ground. |
Use Scenario: Piezoresistive pressure sensor (1–5 kΩ span) in industrial process control outputs mV/V signal requiring amplification before 12-bit ADC. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (two-op-amp topology) providing gain of 100 with <20 μA total supply current. Use Value: Verified CMRR ≥68 dB at 12 V common-mode rejects supply noise; rail-to-rail output ensures full-scale digitization without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6042AIM/NOPB | SOIC-8 package; 165°C/W thermal resistance vs. PDIP's 101°C/W; identical electrical specs and pinout. | Suitable for space-constrained PCBs; requires reflow-compatible layout and stencil design. | Select when surface-mount assembly is preferred and thermal derating at >70°C ambient is acceptable. |
| TLV2462IDR | Higher supply current (550 μA/amp); 1 pA input bias; 2.5 V to 6 V supply range only; no ground-swing capability below 50 mV. | Not suitable for ultra-low-power or true ground-referenced inputs; better for higher-speed, moderate-power applications. | Choose only if bandwidth >1 MHz is required and battery life is secondary to response time. |
Compared with LMC6042AIM/NOPB, the LMC6042AIN/NOPB offers superior thermal performance in through-hole designs and legacy-compatible mounting, while TLV2462IDR trades femtoamp precision and rail-to-rail ground swing for speed - making it unsuitable for pH or photodiode use cases requiring sub-picoamp accuracy.
Availability
LMC6042AIN/NOPB is available at Aetrix Electronics and suitable for battery monitoring, photodiode preamplification, and pH probe buffering requiring stable component supply across industrial, medical, and environmental instrumentation programs.
Supply support for LMC6042AIN/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 chains.
The LMC6042AIN/NOPB belongs to TI's micropower precision op-amp family, designed specifically for ultra-low-current, high-impedance sensor interfaces in portable and energy-constrained systems.
FAQ
What is the maximum operating supply voltage for the LMC6042AIN/NOPB?
The LMC6042AIN/NOPB has an absolute maximum supply voltage of 16 V, but its recommended operating range is 4.5 V to 15.5 V. Operation above 13 V requires limiting output short-circuit duration to avoid reliability degradation, as specified in the Absolute Maximum Ratings table of the SNOS611E datasheet. The LMC6042AIN/NOPB delivers optimal rail-to-rail swing and stability within this 4.5–15.5 V window.
Does the LMC6042AIN/NOPB support true rail-to-rail input common-mode range?
No - the LMC6042AIN/NOPB supports rail-to-rail *output* swing and an input common-mode range that *includes ground*, extending from −0.1 V (min) to V+−2.3 V (max) at room temperature. It does not accept inputs at the positive rail. This design enables direct interfacing with grounded sensors while maintaining CMRR ≥50 dB across the valid range, as confirmed in the Electrical Characteristics table.
Can the LMC6042AIN/NOPB drive capacitive loads directly?
The LMC6042AIN/NOPB is not inherently stable with direct capacitive loads >100 pF. However, its datasheet provides validated compensation methods: adding a pull-up resistor conducting ≥10 μA to V+, or using an R/C network in the feedback path (e.g., Cf across Rf per Figure 29). These techniques restore phase margin for loads up to several nF, as demonstrated in Figures 27–28 of SNOS611E.
Is the LMC6042AIN/NOPB RoHS compliant and lead-free?
Yes - the LMC6042AIN/NOPB carries the "/NOPB" suffix, indicating TI's Green (RoHS & no Sb/Br) compliance with EU RoHS Directive 2011/65/EU. Its lead finish is matte tin (SN), and it meets JEDEC MSL Level-1 rating with unlimited floor life. Full compliance documentation is available in TI's PACKAGE OPTION ADDENDUM dated 6-Feb-2020.
How does the LMC6042AIN/NOPB compare to the single-channel LMC6041?
The LMC6042AIN/NOPB shares identical per-amplifier specifications with the LMC6041 (2 fA IB, 10 μA/amp IS, rail-to-rail output), but integrates two independent amplifiers in one PDIP-8 package. This enables compact dual-channel designs - such as two-op-amp instrumentation amplifiers or differential sensor pairs - without doubling board area or supply routing, as confirmed in TI's device family description on page 1 of SNOS611E.
LMC6042AIN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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:
- 26µA (x2 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:
- 8-PDIP
LMC6042AIN/NOPB FAQ
1.How can I place an order for LMC6042AIN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6042AIN/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 LMC6042AIN/NOPB reliable?
The price and inventory of LMC6042AIN/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6042AIN/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6042AIN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6042AIN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6042AIN/NOPB?
LMC6042AIN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6042AIN/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 LMC6042AIN/NOPB?
For technical support, including LMC6042AIN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6042AIN/NOPB requirements.
6.How does Aetrix verify that LMC6042AIN/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6042AIN/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 LMC6042AIN/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6042AIN/NOPB?
All LMC6042AIN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6042AIN/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 LMC6042AIN/NOPB part is unused and in its original packaging.
Return procedure for LMC6042AIN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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