Texas Instruments LM2904BIDDFR

Overview

LM2904BIDDFR from Texas Instruments is a dual operational amplifier optimized for cost-sensitive industrial and automotive applications, featuring 3V–36V supply range, 300µA/ch quiescent current, 1.2MHz unity-gain bandwidth, rail-to-rail input (including ground), and ±3mV max input offset voltage at 25°C. It serves as a precision signal conditioning and feedback amplification stage in motor control, power supply monitoring, and sensor interface circuits.

For engineers reviewing the LM2904BIDDFR datasheet, LM2904BIDDFR pinout, LM2904BIDDFR application, or LM2904BIDDFR equivalent, this page delivers verified electrical specifications, SOT-23-8 package details, thermal performance data, EMI-filtered operation, and validated alternatives for design-in and BOM optimization.

Technical Context

The LM2904BIDDFR implements two independent high-voltage op amps with internal RF/EMI filtering, enabling robust operation in electrically noisy environments such as motor drives and power converters. Its common-mode input range extends to V– (ground in single-supply use), supporting direct low-side current sensing without level-shifting circuitry.

Designed for extended temperature operation (–40°C to +125°C), it maintains 1.2MHz gain-bandwidth product and 0.5V/µs slew rate across its full supply and temperature range, with open-loop gain ≥35 V/mV at –40°C to +125°C and output drive capability of ±20mA per channel.

Key Specifications

Pinout & Package

LM2904BIDDFR is housed in an 8-pin SOT-23 package (DDF), measuring 2.9mm × 2.8mm, with exposed pad for thermal enhancement and surface-mount compatibility in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual operational amplifier applications.

Compared with LM2904DR and LM2904BQDRQ1, the LM2904BIDDFR offers identical core performance in the smallest industry-standard SOT-23-8 footprint, making it optimal for space-constrained industrial modules where AEC-Q100 certification is not required but extended temperature and EMI resilience are critical.

Availability

LM2904BIDDFR is available at Aetrix Electronics and suitable for motor control feedback, power supply monitoring, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LM2904BIDDFR 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 op amp design and high-volume manufacturing reliability.

The LM2904B series belongs to TI's industry-standard dual op amp product line, engineered specifically for ruggedized industrial and automotive signal conditioning where wide supply range, ground-sensing capability, and EMI resilience are non-negotiable.

FAQ

What is the maximum supply voltage rating for LM2904BIDDFR?

The LM2904BIDDFR has an absolute maximum supply voltage (V+ to V–) of ±20 V or 40 V total, as specified in Section 5.1 of the official datasheet. However, its recommended operating range is 3 V to 36 V, and all electrical characteristics-including gain bandwidth, offset voltage, and output swing-are guaranteed only within that 3–36 V window. Exceeding 36 V risks parametric degradation or permanent damage even if below the absolute maximum.

Does LM2904BIDDFR support true rail-to-rail output swing?

No, the LM2904BIDDFR does not provide rail-to-rail output swing. Its output can swing to within approximately 1.4 V of V+ and 20 mV of V– (at 1 mA load, TA = –40°C to +125°C), as documented in Section 5.6. This limited output swing is typical of standard bipolar-input op amps and must be accounted for in feedback network design-especially in single-supply 3.3 V or 5 V systems where headroom is constrained.

Can LM2904BIDDFR replace LM2904 in existing designs?

Yes, LM2904BIDDFR is a direct functional upgrade to LM2904, offering improved specifications including lower input offset voltage (±3 mV vs. ±7 mV), higher ESD rating (2 kV HBM vs. 500 V), and integrated RF/EMI filtering. The pinout, package (DDF), and basic electrical behavior are identical, enabling drop-in replacement in most cases-though designers should verify layout compatibility with the smaller SOT-23-8 footprint and confirm thermal performance under worst-case ambient conditions.

What is the thermal resistance (RθJA) of LM2904BIDDFR in its SOT-23-8 package?

The junction-to-ambient thermal resistance (RθJA) for LM2904BIDDFR in the DDF (SOT-23-8) package is 164.3°C/W, as published in Table 5.4 of the datasheet. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad). Actual thermal performance improves significantly with PCB-level thermal vias to internal ground planes or exposed-pad soldering-critical for sustained 300 µA/ch operation at +125°C ambient.

Is LM2904BIDDFR suitable for automotive applications?

LM2904BIDDFR is qualified for operation from –40°C to +125°C and features 2 kV HBM ESD protection and integrated EMI filtering-making it suitable for many automotive body electronics and under-hood auxiliary functions. However, it is not AEC-Q100 certified. For safety-critical or production automotive ECUs requiring PPAP documentation and zero-defect traceability, TI's LM2904BQDRQ1 (AEC-Q100 Grade 1) is the designated qualified alternative.