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Texas Instruments ALM2402QDRRRQ1
- Part No.:
- ALM2402QDRRRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
ALM2402QDRRRQ1.pdf
- Description:
- IC POWER 2 CIRCUIT 12WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ALM2402QDRRRQ1 from Texas Instruments is a dual high-voltage, high-current operational amplifier optimized for driving low-impedance and high-ESR capacitive loads in automotive systems. It delivers 400 mA continuous output current per channel, operates from 5.0 V to 16 V supply, features over-temperature shutdown with flag output, and supports rail-to-rail output swing with separate output-stage supplies (VCC_O1/VCC_O2). It is used in resolver excitation, IGBT gate driving, and tracking LDOs.
For engineers reviewing the ALM2402QDRRRQ1 datasheet, ALM2402QDRRRQ1 pinout, ALM2402QDRRRQ1 application, or ALM2402QDRRRQ1 equivalent, key selection considerations include its 400 mA per-channel drive capability, dual independent output supply pins for VOH control, thermal shutdown flag functionality, stability with up to 3 µF capacitive loads, and AEC-Q100 Grade 1 qualification for –40°C to 125°C ambient operation.
Technical Context
The ALM2402QDRRRQ1 integrates two independent high-current op-amps with discrete PMOS/NMOS power boost buffers per channel, enabling rail-to-rail output swing and robust short-circuit protection. Each channel includes dedicated output-stage supply pins (VCC_O1/VCC_O2), allowing independent voltage setting to limit VOH and manage on-die power dissipation.
It implements bidirectional OTF/SH_DN logic for over-temperature flagging and shutdown control, with internal thermal detection that forces the pin low at ~165°C junction temperature. Input common-mode range spans 0.2 V to VCC–1.2 V, and built-in EMI rejection filtering improves immunity across 10 MHz–1 GHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current (per channel) | 400 mA continuous sourcing/sinking - enables direct drive of power-FET gates, solenoids, and resolver windings without external buffers. |
| Supply Range (VCC) | 4.5 V to 16 V - supports wide automotive battery voltage transients and 12 V system integration. |
| Output Supply Range (VCC_OX) | 3 V to 16 V - allows independent scaling of output stage voltage to constrain VOH, reduce die heating, and match load requirements. |
| Thermal Shutdown Threshold | 157–175°C junction temperature - triggers OTF/SH_DN low and disables both outputs to prevent permanent damage. |
| Capacitive Load Stability | Stable with up to 3 µF - eliminates need for isolation resistors when driving cable shields, supercaps, or reference buffers. |
| Input Offset Voltage (typ) | 1 mV - ensures accurate DC gain and minimal error in precision sensing and feedback loops. |
| Gain Bandwidth Product | 600 kHz - sufficient for closed-loop control in motor drives, tracking LDOs, and analog signal conditioning. |
| AEC-Q100 Grade | Grade 1 (–40°C to 125°C ambient) - qualified for under-hood and powertrain applications requiring extended temperature reliability. |
Pinout & Package
The ALM2402QDRRRQ1 is housed in a 3.00 mm × 3.00 mm 12-pin SON (DRR) package with an exposed thermal pad that must be connected to PCB ground for optimal thermal performance (θJA = 39.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1+, IN2+ | Non-inverting input | Differential input terminals for each op-amp; support common-mode range of 0.2 V to VCC–1.2 V. |
| IN1–, IN2– | Inverting input | Feedback and signal inversion inputs; internally clamped to ±7 V for fault tolerance. |
| OUT1, OUT2 | Amplifier output | Rail-to-rail capable outputs with integrated PMOS/NMOS drivers and reverse diodes for inductive flyback. |
| VCC_O1, VCC_O2 | Output stage supply | Independent power rails for each output driver - enable VOH limiting and programmable current limit via external series resistance. |
| VCC | Gain stage supply | Powers internal OTA, protection circuitry, and bias networks; must be ≥ VCC_OX and ≤ 16 V. |
| GND (Pins 6 & 12) | Ground reference | Two dedicated ground pins - must be tied together on PCB to minimize ground bounce and ensure thermal pad conduction. |
| OTF/SH_DN | Bidirectional flag/shutdown | Drives low during over-temperature events; pulled low to force shutdown (<500 µA IQ); requires external pull-up for normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| High-current buffer architecture | Discrete PMOS/NMOS output stage delivers 400 mA per channel while maintaining rail-to-rail swing and low thermal impedance. |
| Separate output supply pins | VCC_O1/VCC_O2 allow independent voltage setting to cap VOH, reduce die self-heating, and tailor current limit for specific loads. |
| Over-temperature flag with auto-recovery | OTF/SH_DN asserts low at ~165°C junction temp and releases automatically upon cooling - enables system-level thermal monitoring and graceful fault response. |
| EMI rejection filtering | Integrated RF/EMI filter provides >40 dB EMIRR across 10 MHz–1 GHz - reduces offset shift in noisy automotive environments. |
| Stability with large capacitive loads | Guaranteed stable with up to 3 µF - eliminates need for series isolation resistors in cable shield, supercap, and reference buffer applications. |
| AEC-Q100 qualification | Grade 1 ambient (–40°C to 125°C), HBM ±2 kV, CDM ±750 V - validated for safety-critical automotive subsystems including ADAS and powertrain controls. |
Applications
| Resolver Excitation | IGBT Gate Driving |
|---|---|
|
Use Scenario: Generating precise, low-distortion sine/cosine excitation signals for resolver position sensors in electric power steering and traction inverters. IC Role / Device Role / Timing Role: Dual-channel voltage-controlled current source - one channel drives sine winding, the other cosine, with matched gain and phase. Use Value: 400 mA drive capability and <0.1% THD+N at 1 kHz eliminate external amplification stages; rail-to-rail swing ensures full-scale excitation across 12 V supply variations. |
Use Scenario: Directly driving high-side and low-side IGBT gates in motor control inverters where fast turn-on/turn-off and fault robustness are critical. IC Role / Device Role / Timing Role: High-current buffer amplifier - converts PWM controller output to high-slew-rate gate voltage with active short-circuit protection. Use Value: Internal 750 mA high-side and 550 mA low-side current limits prevent destructive shoot-through; OTF flag alerts MCU before thermal shutdown occurs. |
| Tracking LDO Reference Buffer | Solenoid & Valve Control |
|
Use Scenario: Buffering and amplifying precision voltage references in tracking LDOs for automotive infotainment and ADAS domain controllers. IC Role / Device Role / Timing Role: Unity-gain stable reference follower - maintains accuracy while sourcing transient load currents up to 400 mA. Use Value: 1 mV typical offset and 0.01%/°C drift preserve reference integrity; stability with 1 µF ceramic output caps simplifies layout and reduces BOM count. |
Use Scenario: Driving 12 V solenoids and proportional valves in transmission control modules and brake-by-wire actuators. IC Role / Device Role / Timing Role: High-current linear driver - replaces discrete transistor stages with integrated thermal protection and diagnostic flag. Use Value: Bidirectional OTF/SH_DN pin provides real-time fault indication; internal reverse diodes absorb inductive kickback without external flyback components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSC2002QDGNRQ1 | Single-channel, 300 mA output, no separate VCC_OX pins, lower PSRR (55 dB) | Limited to single-output systems; lacks independent output supply control for VOH tuning | Choose when space or cost constraints favor single-channel operation and lower current suffices. |
| LM7332QMA/NOPB | Dual-channel, 60 mA output, rail-to-rail I/O, no thermal flag or current limiting | Not suitable for direct solenoid/IGBT drive; requires external protection circuitry | Choose only for low-power signal buffering where thermal and overload protection are handled externally. |
Compared with TSC2002QDGNRQ1 and LM7332QMA/NOPB, the ALM2402QDRRRQ1 uniquely combines dual 400 mA channels, independent output supply control, integrated thermal flagging, and AEC-Q100 Grade 1 qualification - making it the only option capable of replacing discrete power buffers in safety-critical automotive actuation systems without design compromise.
Availability
ALM2402QDRRRQ1 is available at Aetrix Electronics and suitable for resolver excitation, IGBT gate driving, and solenoid control applications requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for ALM2402QDRRRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.
The ALM2402QDRRRQ1 belongs to TI's automotive-qualified high-current op-amp product line, designed specifically for robust analog signal conditioning and power interface tasks in harsh-temperature, high-reliability vehicle subsystems.
FAQ
What is the maximum continuous output current per channel for the ALM2402QDRRRQ1?
The ALM2402QDRRRQ1 delivers 400 mA continuous sourcing and sinking current per channel under recommended operating conditions. This rating applies across the full ambient temperature range (–40°C to 125°C) and is enabled by its discrete PMOS/NMOS output stage and low-thermal-resistance DRR package. The device also features internal current limiting - 750 mA for high-side (short-to-supply) and 550 mA for low-side (short-to-ground) faults - which activates dynamically to protect the die.
How does the OTF/SH_DN pin function in the ALM2402QDRRRQ1?
The OTF/SH_DN pin on the ALM2402QDRRRQ1 is a bidirectional terminal that serves dual roles: it acts as an over-temperature flag (driven low when junction temperature exceeds ~165°C) and as a shutdown enable (pulled low to place both op-amps into a <500 µA quiescent state). An external pull-up resistor is required for normal operation. When asserted low - whether by thermal event or user command - the outputs enter high-impedance mode and internal biasing is disabled, breaking closed-loop functionality until the pin is released.
Can the ALM2402QDRRRQ1 drive a 3 µF capacitive load without oscillation?
Yes, the ALM2402QDRRRQ1 is explicitly characterized and guaranteed stable with capacitive loads up to 3 µF, as confirmed in the datasheet's Typical Characteristics and Applications sections. This stability is achieved through internal compensation optimized for heavy capacitive loading, eliminating the need for external isolation resistors in applications such as cable shield drivers, supercapacitor chargers, and reference buffers - unlike standard op-amps that typically require series resistance or complex compensation networks.
What is the purpose of the separate VCC_O1 and VCC_O2 pins on the ALM2402QDRRRQ1?
The VCC_O1 and VCC_O2 pins on the ALM2402QDRRRQ1 supply power exclusively to the output-stage PMOS/NMOS drivers - independent of the main VCC rail that powers the input OTA and protection circuitry. This separation allows designers to set a lower voltage on VCC_OX to cap the maximum output high voltage (VOH), thereby reducing on-die power dissipation and enabling programmable current limiting via series resistance between VCC_OX and the supply. It is a key enabler for thermal management in high-current automotive applications.
Is the ALM2402QDRRRQ1 qualified for automotive use, and what standards does it meet?
Yes, the ALM2402QDRRRQ1 is AEC-Q100 qualified for automotive applications. It meets Grade 1 requirements (–40°C to 125°C ambient operating temperature), HBM ESD classification Level H2 (±2 kV), and CDM Level C5 (±750 V). These qualifications were verified per JEDEC standards and are documented in the SLOS912D datasheet. The device is intended for use in safety-critical systems including powertrain, chassis, and ADAS subsystems where reliability under extended temperature and electrical stress is mandatory.
ALM2402QDRRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Power
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.17V/µs
- Gain Bandwidth Product:
- 600 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.5 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 5mA (x2 Channels)
- Current - Output / Channel:
- 400 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WSON (3x3)
ALM2402QDRRRQ1 FAQ
1.How can I place an order for ALM2402QDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ALM2402QDRRRQ1 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 ALM2402QDRRRQ1 reliable?
The price and inventory of ALM2402QDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALM2402QDRRRQ1 is usually 5 days.
3.What payment methods are accepted for ALM2402QDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALM2402QDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALM2402QDRRRQ1?
ALM2402QDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALM2402QDRRRQ1 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 ALM2402QDRRRQ1?
For technical support, including ALM2402QDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALM2402QDRRRQ1 requirements.
6.How does Aetrix verify that ALM2402QDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All ALM2402QDRRRQ1 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 ALM2402QDRRRQ1 meets industry standards.
7.What is the process for return or replacement of ALM2402QDRRRQ1?
All ALM2402QDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ALM2402QDRRRQ1, 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 ALM2402QDRRRQ1 part is unused and in its original packaging.
Return procedure for ALM2402QDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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