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STMicroelectronics L272M
- Part No.:
- L272M
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
L272M.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8MINI DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,414
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Product details
Overview
L272M from STMicroelectronics is a dual monolithic power operational amplifier in MiniDIP-16 package, delivering up to 1 A DC output current per channel, operating from single (4–28 V) or split supplies, with ground-compatible inputs and low saturation voltage-used in bidirectional DC motor control, CD servo amplifiers, and VCR capstan motor drivers.
For engineers reviewing the L272M datasheet, L272M pinout, L272M application, or L272M equivalent, key selection criteria include output current capability (1 A), thermal shutdown threshold (145 °C), slew rate (1 V/µs), gain-bandwidth product (350 kHz), and common-mode rejection (60–75 dB) under real-world load and supply conditions.
Technical Context
The L272M integrates two independent high-output-power op-amps on a single die, each featuring internal thermal shutdown and optimized for linear power stage operation. Its input stage supports rail-to-rail common-mode range down to ground, enabling direct interfacing with microcontroller-compatible logic-level signals.
It employs a Class AB output stage with low saturation voltage (≤2.5 V at 0.5 A), enabling efficient drive into low-impedance loads like motors and solenoids. The device maintains stability with capacitive loads up to 100 nF when properly decoupled using Boucherot cells and supply bypassing per application note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A DC per channel - drives motors, solenoids, and power transistors without external boost stages. |
| Slew Rate | 1 V/µs - supports audio-frequency and servo-loop bandwidths up to ~100 kHz with minimal distortion. |
| Gain-Bandwidth | 350 kHz - enables stable closed-loop gain ≥10 at 30 kHz for precision speed/position control loops. |
| Input Offset Voltage | 15–60 mV - sets minimum resolvable differential signal; requires offset nulling in precision integrators. |
| Thermal Shutdown | 145 °C junction - protects against latch-up during sustained overload or poor heatsinking in MiniDIP package. |
| Supply Voltage Range | ±6 V to ±12 V or 4–28 V single - compatible with 12 V/24 V industrial rails and legacy consumer electronics supplies. |
| Common-Mode Rejection | 60–75 dB at 1 kHz - rejects noise from shared ground paths in motor-drive feedback networks. |
Pinout & Package
Package: MiniDIP-16 (10.92 mm × 7.95 mm, 0.430″ × 0.313″), through-hole mounting, JEDEC MS-012 compliant, thermal resistance Rth j-amb = 100 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | Output A / Output B | High-current push-pull outputs capable of sourcing/sinking 1 A; require local 100 nF bypass to ground. |
| 2, 15 | Inverting Input A / B | Differential inputs with 500 kΩ input resistance; accept ground-referenced signals in single-supply mode. |
| 3, 14 | Non-inverting Input A / B | Matched to inverting inputs; used for unity-gain buffers or non-inverting configurations with >10 kΩ feedback. |
| 4, 13 | V− Supply | Negative rail connection; must be decoupled with 100 nF ceramic capacitor near pin. |
| 8, 9 | V+ Supply | Positive rail connection; shared across both amplifiers; requires low-ESR bulk + ceramic decoupling. |
| 5, 12 | Offset Null A / B | Adjustment pins for trimming input offset voltage using 10 kΩ potentiometer between pins 5–12 and V−. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-Compatible Inputs | Operates with common-mode voltage down to 0 V - eliminates level-shifting circuitry in 0–5 V MCU interface designs. |
| Thermal Shutdown Protection | Auto-recovery after junction cools below 135 °C - prevents permanent damage during transient overloads in motor stall conditions. |
| Low Saturation Voltage | ≤2.5 V at 0.5 A load - maximizes usable voltage swing across motor windings in 12 V systems (e.g., 9.5 V effective drive). |
| Large Differential Input Range | ±28 V - allows direct sensing of full-rail supply voltages without external attenuators in current-sense applications. |
| Channel Separation | 60 dB at 1 kHz - ensures crosstalk <0.1% between dual motor channels in bidirectional drive circuits. |
Applications
| Bidirectional DC Motor Control | CD Player Servo Amplifier |
|---|---|
Use Scenario: Microcontroller-driven H-bridge interface where L272M drives gate/base of external power transistors with µP-compatible logic-level inputs. IC Role / Device Role / Timing Role: Dual-channel power op-amp providing current gain and voltage buffering between digital controller and power stage. Use Value: Enables precise torque/speed regulation with 1 A peak drive per channel and thermal fault protection during motor stall. | Use Scenario: Focus and tracking actuator driver in compact disc players, requiring low-noise, stable closed-loop response. IC Role / Device Role / Timing Role: High-gain, low-distortion servo amplifier compensating optical pickup position errors at 1–5 kHz bandwidth. Use Value: 350 kHz GBW and 1 V/µs slew rate support fast settling (<100 µs) for sub-micron lens positioning accuracy. |
| VCR Capstan Motor Control | Industrial Solenoid Driver |
Use Scenario: Constant-speed tape transport system in video cassette recorders, demanding low-distortion analog drive and thermal robustness. IC Role / Device Role / Timing Role: Linear power amplifier converting DAC output to proportional motor winding current with ripple suppression. Use Value: 60 dB channel separation prevents sync pulse interference between capstan and pinch roller control loops. | Use Scenario: High-duty-cycle solenoid activation in factory automation valves, requiring sustained 1 A drive and thermal margin. IC Role / Device Role / Timing Role: Power buffer stage translating TTL/CMOS logic levels to high-current coil drive with fast turn-on/turn-off. Use Value: Low saturation voltage (≤2.5 V) delivers >9 V across 12 V solenoid coils, ensuring reliable mechanical actuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-current op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA0372D | Lower output current (1.2 A peak, 0.5 A continuous); no thermal shutdown; SO-16 only. | Not suitable for sustained 1 A loads; lacks fault protection in motor stall scenarios. | Select only for intermittent duty-cycle applications with active thermal management. |
| LM12CL | Higher output current (1.5 A continuous); TO-100 metal can package; higher quiescent current (12 mA). | Requires heatsink and through-hole mounting; less space-efficient than MiniDIP-16. | Prefer for high-reliability industrial systems where thermal derating and long-term stability outweigh board-space constraints. |
Compared with TCA0372D and LM12CL, the L272M uniquely balances 1 A continuous output, integrated thermal shutdown, MiniDIP-16 footprint, and ground-referenced inputs-making it optimal for cost-sensitive, space-constrained consumer and industrial motion-control PCBs.
Availability
L272M is available at Aetrix Electronics and suitable for bidirectional DC motor control, CD/DVD servo systems, VCR capstan drivers, and industrial solenoid interfaces requiring stable component supply across extended production lifecycles.
Supply support for L272M 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, and microcontroller solutions for automotive, industrial, and consumer markets.
The L272M belongs to ST's legacy power op-amp product line, engineered specifically for linear power-stage amplification in electromechanical control systems where reliability, thermal resilience, and interface simplicity are critical.
FAQ
What is the maximum safe continuous output current for L272M in MiniDIP package?
The L272M supports 1 A DC output current per channel continuously under specified thermal conditions: ambient temperature ≤50 °C with adequate PCB copper area (≥25 cm² per side) and no forced airflow. Exceeding this without heatsinking risks triggering thermal shutdown at 145 °C junction temperature.
Can L272M operate from a single 5 V supply in microcontroller-based designs?
Yes - the L272M operates from single supplies as low as 4 V. With ground-compatible inputs and output swing within 2.5 V of rails at 0.5 A, it delivers ~2.5 V across a 10 Ω load from 5 V supply, making it viable for low-voltage logic-interfaced actuators, though output headroom is limited.
Does L272M require external compensation for unity-gain stability?
No - the L272M is internally compensated for unity-gain stability. Application circuits in Figures 9–13 confirm stable operation with resistive feedback networks and typical capacitive loads (<100 nF), provided supply bypassing (100 nF ceramic + 10 µF electrolytic) and Boucherot cells are implemented per datasheet guidance.
How does L272M's channel separation affect dual-motor control performance?
L272M provides 60 dB channel separation at 1 kHz, meaning crosstalk is ≤0.1% between channels. In dual-motor systems (e.g., pan/tilt cameras), this prevents unintended speed modulation in one motor due to PWM or commutation noise coupling through shared supply or ground paths.
L272M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 300 nA
- Voltage - Input Offset:
- 15 mV
- Current - Supply:
- 8mA
- Current - Output / Channel:
- 700 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-Mini DIP
L272M FAQ
1.How can I place an order for L272M through Aetrix?
Please submit a Request for Quotation (RFQ) for L272M 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 L272M reliable?
The price and inventory of L272M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L272M is usually 5 days.
3.What payment methods are accepted for L272M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L272M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L272M?
L272M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L272M 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 L272M?
For technical support, including L272M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L272M requirements.
6.How does Aetrix verify that L272M is sourced from the original manufacturer or authorized distributors?
All L272M 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 L272M meets industry standards.
7.What is the process for return or replacement of L272M?
All L272M units undergo pre-shipment inspection (PSI). If there is an issue with L272M, 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 L272M part is unused and in its original packaging.
Return procedure for L272M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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