Texas Instruments LM2904BAIDDFR

Overview

LM2904BAIDDFR from Texas Instruments is a dual operational amplifier in SOT-23-8 package, designed for cost-sensitive industrial and automotive applications requiring rail-to-rail input (including ground), 3V–36V supply operation, 1.2MHz unity-gain bandwidth, and ≤2mV input offset voltage at 25°C. It serves as a precision signal conditioning and feedback amplification stage in power supply monitoring circuits.

For engineers reviewing the LM2904BAIDDFR datasheet, LM2904BAIDDFR pinout, LM2904BAIDDFR application, or LM2904BAIDDFR equivalent, this page delivers verified electrical specifications, validated pin functions, thermal performance data, and real-world implementation context for embedded control, motor drive sensing, and DC-DC converter feedback loops.

Technical Context

The LM2904BAIDDFR implements a bipolar-input, internally compensated two-stage op amp architecture with rail-to-rail common-mode input range down to V−, enabling direct low-side current sensing. Its 1.2MHz gain-bandwidth product supports stable closed-loop operation at unity gain without external compensation.

It features integrated RF/EMI filtering on inputs and outputs, 2kV HBM ESD rating, and guaranteed operation across −40°C to +125°C ambient temperature-making it suitable for under-hood automotive modules and industrial motor controllers where environmental robustness is critical.

Key Specifications

Pinout & Package

LM2904BAIDDFR uses the DDF (SOT-23-8) package: 2.9 mm × 2.8 mm, 0.95 mm height, surface-mount, moisture-sensitive level 1 (MSL-1). Pin 1 is marked by a dot; device orientation follows JEDEC MO-178AB standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2904BIDDFR and TLV2372IDGKR, LM2904BAIDDFR provides the lowest input offset in the LM2904 family while maintaining full 3–36 V operation and automotive-grade temperature range-making it optimal for precision analog front-ends in harsh environments.

Availability

LM2904BAIDDFR is available at Aetrix Electronics and suitable for industrial motor control, automotive HVAC inverters, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.

Supply support for LM2904BAIDDFR 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 amps and industrial-grade ICs.

The LM2904BA series belongs to TI's industry-standard dual op amp product line, engineered for ruggedized signal conditioning in automotive, industrial, and power management systems where reliability across extended temperature ranges is essential.

FAQ

What is the maximum supply voltage for LM2904BAIDDFR?

The LM2904BAIDDFR supports a maximum supply voltage of 36 V across V+ to V−. This is confirmed in Section 5.1 Absolute Maximum Ratings and Section 5.3 Recommended Operating Conditions of the official datasheet (SLOS068AB, October 2024 revision). Operation beyond 36 V risks permanent damage. The device maintains specified performance from 3 V to 36 V, making it compatible with 5 V, 12 V, 24 V, and 32 V systems. LM2904BAIDDFR does not require derating below 36 V for continuous operation.

Does LM2904BAIDDFR support single-supply operation with input referenced to ground?

Yes, LM2904BAIDDFR supports true single-supply operation with common-mode input voltage range extending to V− (ground). Per Section 5.3 and Figure 4-1 of the datasheet, its input stage operates down to the negative rail, enabling direct connection of sensors or shunt resistors to ground without external biasing. This capability is explicitly called out in the "Features" section and validated in Electrical Characteristics tables for LM2904BA. LM2904BAIDDFR is routinely used in low-side current sensing and 0–5 V signal conditioning applications.

What is the typical quiescent current per channel for LM2904BAIDDFR at 5 V supply?

The typical quiescent current per channel for LM2904BAIDDFR is 300 µA at 5 V supply and 25°C, as specified in Section 5.6 Electrical Characteristics: LM2904B and LM2904BA. This value holds across the full operating temperature range (−40°C to +125°C), with a maximum of 460 µA. At 36 V supply, quiescent current rises to 800 µA (typical). These values are measured with zero output load and are consistent across all LM2904BA variants in DDF, SOIC, TSSOP, and VSSOP packages.

Is LM2904BAIDDFR pin-compatible with LM2904IDDFR?

Yes, LM2904BAIDDFR is pin-compatible with LM2904IDDFR and all other LM2904x variants in the DDF (SOT-23-8) package. Pin configuration is identical per Figure 4-1 and Table 4-1 of the datasheet: OUT1, IN1−, IN1+, V−, IN2+, IN2−, OUT2, V+. No PCB layout changes are required when upgrading from LM2904IDDFR or LM2904BIDDFR to LM2904BAIDDFR. The only functional difference is the tighter input offset voltage specification (±2 mV vs. ±3 mV or ±7 mV), with identical electrical behavior otherwise.

What thermal metrics apply to LM2904BAIDDFR in the DDF package?

For LM2904BAIDDFR in the DDF (SOT-23-8) package, the key thermal metrics are: RθJA = 164.3°C/W (junction-to-ambient), RθJC(bot) = 10.6°C/W (junction-to-case bottom), and ψJB = 81.7°C/W (junction-to-board). These values are listed in Section 5.4 Thermal Information of the datasheet and assume standard JEDEC 2-layer board conditions. The low RθJC(bottom) confirms efficient heat transfer through the exposed pad (if present) or package bottom to the PCB, critical for sustained operation at elevated ambient temperatures.