Texas Instruments LM2902KDBRE4

Overview

LM2902KDBRE4 from Texas Instruments is a quad operational amplifier optimized for single-supply operation, featuring rail-to-rail input (V– to V+ − 2 V), ±3 mV max input offset voltage at 25°C, 1.2 MHz gain-bandwidth product, and 240 µA per amplifier quiescent current. It operates across 3 V to 36 V supply range and supports industrial temperature range (−40°C to +125°C), commonly used in power supply feedback loops, sensor signal conditioning, and motor control interfaces.

For engineers reviewing the LM2902KDBRE4 datasheet, LM2902KDBRE4 pinout, LM2902KDBRE4 application, or LM2902KDBRE4 equivalent, key selection criteria include its guaranteed input common-mode range down to V–, output swing within 20 mV of V– at 1 mA load, ESD robustness (2 kV HBM), integrated EMI/RF filtering, and drop-in compatibility with legacy LM2902 variants in SOIC-14 packages.

Technical Context

The LM2902KDBRE4 implements a standard voltage-feedback op-amp topology with high open-loop gain (≥25 V/mV over −40°C to +125°C), unity-gain stable design, and internal compensation. Its input stage uses PNP differential pairs enabling rail-to-rail common-mode input down to the negative rail - critical for single-supply transducer interfacing.

It delivers 1.2 MHz GBW and 0.5 V/µs slew rate under 1 MΩ load and 30 pF capacitance, supporting moderate-speed closed-loop configurations such as active filters, comparators with hysteresis, and precision current sensing amplifiers without external compensation.

Key Specifications

Pinout & Package

LM2902KDBRE4 is housed in a 14-pin SOIC (D package), 8.65 mm × 6 mm body size, with exposed pad not present. Pin numbering follows standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2902DR and LM2902BDR, LM2902KDBRE4 provides tighter offset specification, higher ESD robustness, and verified EMI filtering - making it preferable for new designs targeting long-term field reliability in electrically harsh environments.

Availability

LM2902KDBRE4 is available at Aetrix Electronics and suitable for industrial power supplies, motor control interfaces, and sensor signal conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LM2902KDBRE4 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The LM2902 family is designed for cost-sensitive, general-purpose analog signal conditioning in single-supply systems - emphasizing robustness, ease of use, and broad interoperability across decades of legacy designs.

FAQ

What is the maximum operating temperature range for LM2902KDBRE4?

The LM2902KDBRE4 is rated for operation from −40°C to +125°C ambient temperature. This extended range is confirmed in Section 6.3 of the official TI datasheet (SLOS066AE) and applies across the full supply voltage range (3 V to 36 V). The device maintains specified electrical performance - including input offset voltage, common-mode range, and output swing - throughout this interval, making LM2902KDBRE4 suitable for under-hood automotive modules and industrial motor drives where thermal stress is significant.

Does LM2902KDBRE4 support rail-to-rail output swing?

No, LM2902KDBRE4 does not provide rail-to-rail output swing. Its output can swing to within approximately 1.5 V of VCC+ (positive rail) and as close as 5 mV to 20 mV above VCC− (negative rail or ground) depending on load current. At 1 mA sink current, the low-side output reaches within 20 mV of VCC−; at 5 mA, it remains within 1.75 V of VCC+. This asymmetric swing is typical of standard bipolar-output op-amps and is explicitly documented in Section 6.6 of the LM2902B/LM2902BA electrical characteristics table.

Is LM2902KDBRE4 pin-compatible with older LM2902 variants in SOIC-14?

Yes, LM2902KDBRE4 uses the standard 14-pin SOIC (D package) footprint and shares identical pin configuration with all legacy LM2902 variants in that package - including LM2902N, LM2902DR, and LM2902K. Pin functions (e.g., Pin 4 = VCC+, Pin 11 = VCC−, Pin 3/7/8/14 = amplifier outputs) match exactly per Figure 5-1 and Table 5-1 in the TI datasheet. No PCB redesign is needed when upgrading from earlier versions.

What is the input bias current specification for LM2902KDBRE4?

The input bias current for LM2902KDBRE4 is specified as −10 nA to −35 nA (typical to maximum) at 25°C, and up to −60 nA maximum across the full −40°C to +125°C operating range. This value reflects the PNP input stage architecture and is measured per test condition IB in Section 6.6 of the TI datasheet. Low bias current enables high-accuracy operation with high-impedance sources such as thermistors, photodiodes, and RC timing networks without significant error injection.

Can LM2902KDBRE4 drive capacitive loads directly?

Yes, LM2902KDBRE4 is characterized to drive capacitive loads up to 100 pF while maintaining stability, as stated in the "CLOAD" parameter (Section 6.6). This capability eliminates the need for series isolation resistors when interfacing with ADC sample-and-hold inputs, long PCB traces, or piezoelectric sensors. For loads exceeding 100 pF, external compensation (e.g., a small series resistor at the output) is recommended to prevent peaking or oscillation.