Texas Instruments LMP8602QMA/NOPB

Overview

LMP8602QMA/NOPB from Texas Instruments is a precision bidirectional current-sense amplifier with fixed 50× gain, –22V to +60V input common-mode voltage range at 5V supply, 90dB minimum CMRR, ±1mV max input offset voltage, and in-line filter capability via A1/A2 pins for signal conditioning in high-noise industrial power systems.

For engineers reviewing the LMP8602QMA/NOPB datasheet, LMP8602QMA/NOPB pinout, LMP8602QMA/NOPB application, or LMP8602QMA/NOPB equivalent, key selection criteria include its wide common-mode range enabling direct shunt monitoring in 48V DC/DC converters, precise 50× gain eliminating external gain stages for 16-bit ADC interfacing, and dual-stage architecture supporting configurable filtering between preamplifier (A1) and buffer (A2) outputs.

Technical Context

The LMP8602QMA/NOPB implements a two-stage architecture: a chopping-based level-shift preamplifier (gain = 10×, output on A1 pin) followed by a buffered output stage (gain = 5×, total gain = 50×). Its proprietary input stage withstands large differential fault voltages using internal level-shift resistors, unlike conventional current-sense amplifiers.

It supports single-supply bidirectional operation via the OFFSET pin, enabling zero-current reference adjustment for symmetric positive/negative current measurement. The A1–A2 path allows insertion of RC filters or gain-modifying networks without affecting the preamplifier's stability or accuracy.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 4.90mm × 6.00mm body, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA240A1IDR and MAX40056ASA+T, the LMP8602QMA/NOPB uniquely combines 50× gain, –22V to +60V common-mode, and accessible A1/A2 nodes-enabling analog noise suppression in space-constrained industrial power modules where digital filtering adds latency.

Availability

LMP8602QMA/NOPB is available at Aetrix Electronics and suitable for DC/DC converter monitoring, Intel Server VRM telemetry, and off-highway vehicle inverter applications requiring stable component supply, long-term industrial lifecycle support, and automotive-grade reliability validation.

Supply support for LMP8602QMA/NOPB 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 expertise in precision signal conditioning and power management ICs.

The LMP860x family was designed specifically for high-accuracy, high-common-mode current sensing in industrial power conversion, server infrastructure, and ruggedized mobile equipment-emphasizing fault resilience, low drift, and analog programmability.

FAQ

What is the maximum common-mode voltage the LMP8602QMA/NOPB supports at 5V supply?

The LMP8602QMA/NOPB supports a guaranteed common-mode input range of –22V to +60V when operated from a 5V single supply, as specified in Section 5.6 of the TI datasheet. This enables direct high-side shunt sensing in 48V systems without level-shifting circuitry. The LMP8602QMA/NOPB achieves this via its proprietary chopping-level-shift input architecture, which actively manages common-mode voltage translation across internal resistors.

How does the A1 and A2 pin interface function in the LMP8602QMA/NOPB?

The A1 pin outputs the 10×-gained preamplifier signal, and the A2 pin serves as the buffered input to the 5× output stage-creating an accessible node between gain stages. This allows designers to insert passive RC filters or gain-adjusting networks directly into the signal path, enabling analog noise suppression before final amplification. The LMP8602QMA/NOPB's trimmed 100kΩ A1 output impedance ensures predictable filter behavior without requiring additional buffering.

Can the LMP8602QMA/NOPB measure bidirectional current with a single 5V supply?

Yes, the LMP8602QMA/NOPB supports true bidirectional current measurement using only a single 5V supply, enabled by its dedicated OFFSET pin. When the OFFSET pin is biased to 2.5V (VS/2), the output centers at 2.5V for zero shunt voltage, producing positive output for forward current and negative output for reverse current relative to that midpoint. This eliminates the need for dual supplies or external level-shifting in H-bridge or regenerative braking applications.

What is the typical supply current consumption of the LMP8602QMA/NOPB?

The LMP8602QMA/NOPB draws 1.1mA typical supply current at 5V operation (Section 5.6), with a guaranteed range of 0.45mA to 1.5mA over –40°C to +125°C ambient. This low quiescent current supports energy-efficient designs in battery-backed instrumentation and thermally constrained server VRMs, where thermal dissipation and standby power budgets are tightly controlled.

Does the LMP8602QMA/NOPB require external components for basic operation?

No, the LMP8602QMA/NOPB operates fully functional with only V_S, GND, +IN, –IN, OFFSET (tied to VS/2 for bidirectional use), and a load on OUT. External components are optional: decoupling capacitors (0.1μF ceramic near VS/GND) are recommended for stability, and RC networks between A1 and A2 are used only when in-line filtering is required. The LMP8602QMA/NOPB integrates all precision resistors and trimming internally.