My Inquiry
My Account
Texas Instruments LMC6442IM/NOPB
- Part No.:
- LMC6442IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6442IM/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMC6442IM/NOPB from Texas Instruments is a dual micropower rail-to-rail output operational amplifier optimized for single-supply battery-powered systems. It delivers 0.95 µA/amplifier supply current, 9.5 kHz gain-bandwidth product, and output swing within 30 mV of both rails at 2.2 V supply-enabling precision signal conditioning in smoke detectors and portable instrumentation.
For engineers reviewing the LMC6442IM/NOPB datasheet, LMC6442IM/NOPB pinout, LMC6442IM/NOPB application, or LMC6442IM/NOPB equivalent, key selection criteria include ultra-low quiescent current, guaranteed operation down to 1.8 V, rail-to-rail output capability, and stability at closed-loop gains ≥+2 or ≤−1 without external compensation.
Technical Context
The LMC6442IM/NOPB employs CMOS input stage architecture delivering 5 fA typical input bias current and −0.3 V to (V+ − 0.9 V) input voltage range-supporting ground-sensing configurations in single-supply systems. Its internal compensation ensures stability for AV ≥ +2 or AV ≤ −1 across 1.8 V to 11 V supply range.
At 2.2 V, it achieves 2.1 µW/amplifier power consumption and maintains 103 dB open-loop voltage gain with 63° phase margin. Output drive capability scales with supply voltage: short-circuit current reaches 2100 µA sourcing at 10 V, while maintaining rail-to-rail swing within 22 mV of V− and 22 mV of V+ under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 0.95 µA per amplifier at 2.2 V - enables >10-year battery life in CO detectors with coin-cell power |
| Output Swing | Within 30 mV of V+ and V− at 2.2 V - preserves dynamic range in low-voltage sensor front-ends |
| Gain Bandwidth Product | 9.5 kHz at 2.2 V - supports DC–1 kHz signal conditioning in thermostats and occupancy sensors |
| Input Bias Current | 5 fA typical - minimizes voltage error in high-impedance pH or gas sensor interfaces |
| Common-Mode Range | −0.3 V to V+ − 0.9 V - allows direct ground-referenced input in single-supply smoke alarm circuits |
| Operating Supply Range | 1.8 V to 11 V - compatible with single Li-ion (3.0–4.2 V), two alkaline (2.4–3.2 V), or three NiMH cells |
| Input Offset Voltage | ±3 mV max (LMC6442AI grade) - enables <0.1% accuracy in 12-bit ADC front-end applications |
Pinout & Package
LMC6442IM/NOPB uses an 8-pin SOIC (D0008A) package with 1.27 mm pitch, 3.91 mm width, and 1.75 mm max height. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts differential input signal; supports common-mode down to −0.3 V for ground-referenced sensing |
| 2 | Non-Inverting Input (Amplifier A) | High-impedance node (5 fA bias) for precision sensor interface without loading |
| 3 | Output (Amplifier A) | Rail-to-rail output capable of sourcing/sinking up to 2100 µA at 10 V supply |
| 4 | V− (Ground/Reference) | Single-supply reference node; must be connected to system ground or negative rail |
| 5 | Non-Inverting Input (Amplifier B) | Independent high-Z input for dual-channel signal conditioning (e.g., sensor + reference) |
| 6 | Inverting Input (Amplifier B) | Configurable for feedback or differential input; shares same CMRR and offset specs as Pin 1 |
| 7 | Output (Amplifier B) | Second rail-to-rail output; electrically isolated from Amp A except via shared V+ and V− |
| 8 | V+ | Positive supply rail (1.8–11 V); powers both amplifiers; low PSRR (75 dB) requires clean supply |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 0.95 µA/amplifier at 2.2 V enables decade-long operation on CR2032 coin cells in wireless sensors |
| Rail-to-Rail Output | Swings within 22 mV of V+ and V− at 10 V - maximizes usable ADC input range in 10-bit systems |
| Wide Supply Range | 1.8 V to 11 V operation supports legacy 5 V, modern 3.3 V, and ultra-low-power 1.8 V microcontroller interfaces |
| Ultra-Low Input Bias | 5 fA typical bias current prevents voltage error in >100 MΩ sensor bridges (e.g., thermistors, photodiodes) |
| Stable at AV ≥ +2 | No external compensation required for gain-of-2 instrumentation amps - reduces BOM count and board area |
Applications
| Smoke/Gas Detectors | Portable Instrumentation |
|---|---|
|
Use Scenario: Amplifying low-level current from electrochemical CO sensor in battery-powered detector. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier converting pA-level sensor current to measurable voltage. Use Value: 5 fA input bias avoids signal corruption; 0.95 µA quiescent current extends CR123A battery life beyond 5 years. |
Use Scenario: Signal conditioning for handheld multimeter front-end measuring mV-range thermocouple outputs. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with rail-to-rail output driving 12-bit SAR ADC reference buffer. Use Value: ±3 mV max VOS ensures <0.05% measurement accuracy; 103 dB gain enables 1000× amplification without drift. |
| Thermostats | Occupancy Sensors |
|
Use Scenario: Conditioning NTC thermistor voltage divider output in HVAC wall thermostat with 2xAA power. IC Role / Device Role / Timing Role: Low-drift buffer amplifier feeding microcontroller ADC input with minimal self-heating error. Use Value: 0.4 µV/°C TCVOS limits temperature reading drift to <0.1°C over 0–50°C range. |
Use Scenario: Amplifying weak pyroelectric sensor signal in PIR-based motion detector with coin-cell backup. IC Role / Device Role / Timing Role: High-input-impedance AC-coupled amplifier with adjustable gain for analog signal chain. Use Value: −0.3 V to V+−0.9 V input range allows direct connection to sensor's floating output; 9.5 kHz GBWP supports 1–10 Hz motion detection bandwidth. |
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 |
|---|---|---|---|
| TLV2462IDR | Higher supply current (42 µA/amplifier), wider GBWP (6.4 MHz), but no rail-to-rail output swing below 100 mV of rails | Better for higher-speed sensor interfaces (>10 kHz), unsuitable for sub-100 mV headroom designs like 2.2 V smoke alarms | Select TLV2462IDR only when bandwidth >100 kHz is required and supply current >40× higher is acceptable |
| LPV521MG/NOPB | Lower supply current (322 nA), smaller SC70-5 package, single-channel only, 155 kHz GBWP | Optimized for space-constrained single-sensor nodes; lacks second amplifier for reference buffering or differential pair use | Choose LPV521MG/NOPB for ultra-low-power single-channel apps where dual amplification is unnecessary |
Compared with TLV2462IDR and LPV521MG/NOPB, the LMC6442IM/NOPB uniquely balances sub-1 µA quiescent current, dual-channel integration, rail-to-rail output, and guaranteed 2.2 V operation-making it the only option for dual-amplifier, coin-cell-powered safety-critical sensors requiring full-rail swing and decade-long runtime.
Availability
LMC6442IM/NOPB is available at Aetrix Electronics and suitable for smoke/gas detectors, portable instrumentation, thermostats, and occupancy sensors requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for LMC6442IM/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 LMC6442IM/NOPB belongs to TI's micropower precision op-amp family, designed specifically for battery-operated safety and environmental monitoring systems demanding ultra-low IQ, rail-to-rail output, and long-term reliability.
FAQ
What is the minimum operating supply voltage for LMC6442IM/NOPB?
The LMC6442IM/NOPB is specified to operate down to 1.8 V per the Absolute Maximum Ratings and Operating Ratings tables. At 1.8 V, it maintains rail-to-rail output swing and 0.95 µA/amplifier supply current-enabling compatibility with partially discharged alkaline or NiMH batteries in portable devices.
Can LMC6442IM/NOPB drive capacitive loads without oscillation?
Yes, the LMC6442IM/NOPB can drive up to 300 pF capacitive loads when configured in unity-gain mode with external RC compensation (CC and RC per Figure 35). Without compensation, stability is ensured only for closed-loop gains ≥+2 or ≤−1, as stated in the Applications Information section.
Does LMC6442IM/NOPB support true rail-to-rail input?
No, the LMC6442IM/NOPB features rail-to-rail *output* but not rail-to-rail *input*. Its input common-mode voltage range extends from −0.3 V to V+ − 0.9 V, meaning it accepts inputs down to ground (enabling ground-sensing) but cannot handle signals within 0.9 V of V+.
What is the thermal resistance θJA for LMC6442IM/NOPB in SOIC package?
The LMC6442IM/NOPB in SOIC (D0008A) package has a thermal resistance θJA of 193°C/W, as specified in the Operating Ratings table. This value assumes standard JEDEC 2-layer board conditions and determines maximum allowable power dissipation at ambient temperature.
Is LMC6442IM/NOPB suitable for automotive applications?
The LMC6442IM/NOPB is rated for −40°C to +85°C junction temperature and meets industrial-grade specifications. While not AEC-Q200 qualified, its performance and reliability data support use in non-safety-critical automotive cabin sensors (e.g., occupancy detection, climate control) when validated per system requirements.
LMC6442IM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0041V/µs
- Gain Bandwidth Product:
- 10.5 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.005 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1.9µA (x2 Channels)
- Current - Output / Channel:
- 2.1 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMC6442IM/NOPB FAQ
1.How can I place an order for LMC6442IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6442IM/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 LMC6442IM/NOPB reliable?
The price and inventory of LMC6442IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6442IM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6442IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6442IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6442IM/NOPB?
LMC6442IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6442IM/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 LMC6442IM/NOPB?
For technical support, including LMC6442IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6442IM/NOPB requirements.
6.How does Aetrix verify that LMC6442IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6442IM/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 LMC6442IM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6442IM/NOPB?
All LMC6442IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6442IM/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 LMC6442IM/NOPB part is unused and in its original packaging.
Return procedure for LMC6442IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6442IM/NOPB 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…
