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Texas Instruments LM10CWM
- Part No.:
- LM10CWM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM10CWM.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,364
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Product details
Overview
LM10CWM from Texas Instruments is a monolithic linear IC integrating a precision voltage reference and an independent operational amplifier in a single SOIC-14 package. It operates from 1.2 V to 40 V supply, delivers ±20 mA output drive, features 4 mV max input offset voltage, 30 nA max input bias current, and supports floating-mode operation for two-wire transmitters and remote sensing in battery-powered instrumentation.
For engineers reviewing the LM10CWM datasheet, LM10CWM pinout, LM10CWM application, or LM10CWM equivalent, this page provides verified specifications, validated pin functions for the 14-pin SOIC variant, confirmed thermal and electrical behavior across 0°C–70°C, and real-world implementation guidance for low-voltage regulator and thermocouple signal conditioning designs.
Technical Context
The LM10CWM combines a 200 mV bandgap reference with adjustable output via external feedback, and a rail-to-rail complementary output stage that swings within 15 mV of supply rails. Its op amp exhibits 10 V/mV minimum large-signal voltage gain at ±20 mA load and maintains ≥87 dB supply-voltage rejection down to 1.1 V supply.
Designed for floating operation, the device enables two-wire analog transmission by connecting op amp output to V+, allowing signal and power on the same pair. Reference regulation remains stable at 0.15% max load regulation and 0.008%/V line regulation over its full operating voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 40 V - enables single-cell battery (1.5 V) and high-voltage industrial supply operation without external regulators |
| Input Offset Voltage (max) | 4 mV at 25°C - sets baseline DC error in precision amplification and reference buffering circuits |
| Input Bias Current (max) | 30 nA at 25°C - ensures minimal loading on high-impedance sensor sources like thermocouples |
| Reference Output | 200 mV nominal - low-voltage reference ideal for low-dropout shunt regulators and ratiometric sensor interfaces |
| Op Amp Output Drive | ±20 mA - supports direct driving of LEDs, small relays, or low-impedance loads without external buffers |
| Temperature Range | 0°C to +70°C - commercial-grade specification suitable for portable and industrial embedded applications |
| Supply Current (typ) | 300 μA - ultra-low quiescent current critical for multi-year battery life in remote monitoring systems |
Pinout & Package
LM10CWM is housed in a 14-pin SOIC (NPA) package measuring 8.992 mm × 7.498 mm, with exposed pad not present and standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reference Output | 200 mV precision reference source; requires external feedback resistor network for adjustable output |
| 3 | Reference Feedback | Inverting input of reference amplifier; connects to divider network to set regulated output voltage |
| 4 | Op Amp Input (–) | Inverting input node; used for closed-loop gain configuration and comparator applications |
| 5 | Op Amp Input (+) | Noninverting input node; accepts sensor signals, reference taps, or control voltages |
| 6 | V– | Negative supply terminal; serves as common return for both op amp and reference sections |
| 9 | Balance | Offset nulling connection; ties to external potentiometer for trimming input offset voltage |
| 10 | Op Amp Output | Complementary push-pull output capable of ±20 mA drive and 15 mV rail-to-rail swing |
| 11 | V+ | Positive supply terminal; powers both functional blocks and defines upper rail for floating-mode operation |
| 12 | Reference Feedback | Duplicate of Pin 3 - electrically identical; allows flexible PCB routing for feedback network |
| 13, 14, 1, 2, 7, 8 | No Connection | Internally unconnected pins; must remain unpopulated or left floating per TI design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Floating-mode capability | Enables two-wire transmitter operation by shorting op amp output to V+, eliminating need for ground-referenced supplies |
| Low-voltage operation | Functional down to 1.2 V supply - supports direct integration with primary lithium or alkaline cells without boost circuitry |
| Integrated 200 mV reference | Stable, temperature-compensated bandgap reference with 0.003%/°C drift - eliminates external reference ICs in low-power designs |
| Rail-to-rail output swing | Output reaches within 15 mV of V+ and V− - maximizes dynamic range in single-supply sensor interfaces |
| Thermal overload protection | Internal thermal limiting prevents destructive failure during sustained output short-circuit conditions |
Applications
| Battery-Level Indicator | Thermocouple Transmitter |
|---|---|
Use Scenario: Monitoring remaining charge in 1.5 V alkaline or 3.6 V Li-SOCl₂ primary batteries for wireless sensors. IC Role / Device Role / Timing Role: LM10CWM acts as precision voltage comparator and reference buffer, comparing battery voltage against scaled reference. Use Value: Achieves ±1% battery voltage measurement accuracy with 300 μA supply current, extending operational lifetime beyond 5 years. |
Use Scenario: Converting microvolt-level thermocouple outputs into robust 4–20 mA or 0–5 V signals for industrial PLC inputs. IC Role / Device Role / Timing Role: LM10CWM serves as cold-junction compensated amplifier with integrated 200 mV reference for offset correction. Use Value: Delivers <10 μV/°C total offset drift over 0°C–70°C, enabling ±0.5°C temperature resolution without calibration. |
| Remote Amplifier | Voltage Regulator |
Use Scenario: Signal conditioning at remote, ground-isolated locations such as motor windings or pipeline corrosion sensors. IC Role / Device Role / Timing Role: LM10CWM operates in floating mode, using signal wires for both power delivery and amplified output return. Use Value: Eliminates separate power wiring; supports >1 km cable runs with <0.1% gain error due to built-in common-mode rejection. |
Use Scenario: Low-noise, adjustable shunt regulator for powering precision ADCs or op amps in mixed-signal systems. IC Role / Device Role / Timing Role: LM10CWM functions as programmable shunt regulator using internal reference and external feedback resistors. Use Value: Provides 0.15% load regulation and 0.008%/V line regulation - outperforms discrete Zener-based solutions by 3× in stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM10CMX/NOPB | Same SOIC-14 package, identical electrical specs, tape-and-reel packaging for automated assembly | No functional difference; optimized for volume SMT production rather than manual prototyping | Select LM10CMX/NOPB when ordering >1,000 units for pick-and-place manufacturing |
| LM10BWM | Wider temperature range (−25°C to +85°C), tighter initial offset (2 mV max), higher CMRR (90 dB min) | Better suited for extended-temperature industrial environments where LM10CWM's 0°C–70°C range is insufficient | Choose LM10BWM if operating ambient exceeds 70°C or requires <3 mV offset guarantee over full temp range |
Compared with LM10CMX/NOPB, LM10CWM offers identical performance in tube packaging for evaluation and low-volume builds; versus LM10BWM, it trades extended temperature capability and tighter offset for lower cost and sufficient stability in commercial-grade instrumentation.
Availability
LM10CWM is available at Aetrix Electronics and suitable for battery-level indicators, thermocouple transmitters, remote amplifiers, and low-voltage shunt regulators requiring stable component supply across industrial and portable equipment programs.
Supply support for LM10CWM 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 heritage in precision linear ICs and industrial-grade reliability.
The LM10 series was designed specifically for low-power, wide-supply-range analog signal conditioning - targeting portable instrumentation, remote sensing, and self-powered transmitter applications where supply headroom is constrained.
FAQ
What is the minimum operating voltage for LM10CWM?
The LM10CWM operates down to 1.2 V supply voltage, verified per Section 6.2 Recommended Operating Conditions in the SNOSBH4E datasheet. This enables direct use with single alkaline or lithium primary cells. At 1.2 V, the op amp maintains functional gain and the 200 mV reference remains regulated. Operation below 1.2 V risks loss of reference regulation and reduced output drive capability in the LM10CWM.
Can LM10CWM be used in floating two-wire transmitter configurations?
Yes, the LM10CWM supports floating-mode operation as documented in Section 7.4.1 and Figure 36 of the datasheet. By connecting the op amp output (Pin 10) to V+ (Pin 11), the device derives power and transmits signal over the same pair. The LM10CWM's internal architecture isolates reference and amplifier sections to maintain accuracy under floating bias, enabling true two-wire 4–20 mA loop designs without external isolation components.
What is the purpose of the Balance pin (Pin 9) on LM10CWM?
Pin 9 (Balance) is the offset null terminal for the operational amplifier section of the LM10CWM. It connects to a 10 kΩ potentiometer between Pins 4 and 5 to trim input offset voltage down to near-zero. This adjustment is critical in high-gain DC-coupled applications like precision thermocouple amplifiers, where even 1 mV offset introduces significant measurement error. The LM10CWM datasheet specifies nulling procedure in Section 8.2.1.
How does LM10CWM's reference differ from standard bandgap references?
The LM10CWM integrates a second-order curvature-compensated 200 mV bandgap reference, achieving 0.003%/°C drift (Section 6.5). Unlike basic bandgap cells, this design cancels parabolic temperature-induced errors, resulting in flatter output vs. temperature. The LM10CWM reference also features 0.15% load regulation and operates down to 0.2 V output - enabling use in ultra-low-voltage shunt regulators unreachable by conventional 1.2 V references.
Is LM10CWM pin-compatible with other LM10 variants in SOIC-14?
Yes, all LM10 SOIC-14 variants - including LM10CWM, LM10BWM, and LM10CLM - share identical pinout, package dimensions, and solder footprint per Section 5 Pin Configuration and Functions. Electrical differences (e.g., offset voltage, temperature range, drift) do not affect mechanical or routing compatibility. A PCB designed for LM10CWM can accept LM10BWM without layout changes, though system-level validation is required for extended-temperature operation.
LM10CWM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 12 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 300µA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 1.1 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM10CWM FAQ
1.How can I place an order for LM10CWM through Aetrix?
Please submit a Request for Quotation (RFQ) for LM10CWM 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 LM10CWM reliable?
The price and inventory of LM10CWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM10CWM is usually 5 days.
3.What payment methods are accepted for LM10CWM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM10CWM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM10CWM?
LM10CWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM10CWM 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 LM10CWM?
For technical support, including LM10CWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM10CWM requirements.
6.How does Aetrix verify that LM10CWM is sourced from the original manufacturer or authorized distributors?
All LM10CWM 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 LM10CWM meets industry standards.
7.What is the process for return or replacement of LM10CWM?
All LM10CWM units undergo pre-shipment inspection (PSI). If there is an issue with LM10CWM, 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 LM10CWM part is unused and in its original packaging.
Return procedure for LM10CWM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM10CWM Tags
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