Texas Instruments LMP8602QMAX/NOPB

Overview

LMP8602QMAX/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 for signal conditioning in high-noise industrial power systems.

For engineers reviewing the LMP8602QMAX/NOPB datasheet, LMP8602QMAX/NOPB pinout, LMP8602QMAX/NOPB application, or LMP8602QMAX/NOPB equivalent, key selection criteria include its wide common-mode range for shunt monitoring in DC/DC converters and motor drives, precise gain accuracy (±0.5%), low TCVOS (±10μV/°C), and dual-stage architecture enabling external filtering between A1 and A2 pins.

Technical Context

The LMP8602QMAX/NOPB implements a two-stage architecture: a chopping-based preamplifier with 10× gain and trimmed 100kΩ output impedance resistor (A1), followed by a buffer stage with 5× gain (K2 = 5). This enables configurable signal conditioning via external components between A1 and A2 pins.

It supports single-supply bidirectional operation using the OFFSET pin to set midscale reference, achieves 60kHz bandwidth and 0.83V/μs slew rate at 5V supply, and maintains ≥90dB CMRR across –20V to +60V VCM at 1kHz - critical for accurate current sensing in noisy high-side configurations.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 4.90mm × 6.00mm body size, 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 INA240A1QDRQ1 and MAX40016ATA+T, the LMP8602QMAX/NOPB uniquely combines 50× gain, dedicated A1/A2 filter interface, and integrated OFFSET pin - enabling simpler, more robust bidirectional current sensing in industrial 48V systems without added components or layout overhead.

Availability

LMP8602QMAX/NOPB is available at Aetrix Electronics and suitable for DC/DC converter monitoring, linear motor power stages, Intel server VRMs, and field transmitter & sensor applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for LMP8602QMAX/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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain and power management technologies.

The LMP860x product line was designed specifically for high-accuracy, high-common-mode current sensing in industrial motor drives, server power supplies, and battery management systems - emphasizing robustness, low drift, and flexible signal conditioning.

FAQ

What is the maximum common-mode voltage supported by the LMP8602QMAX/NOPB?

The LMP8602QMAX/NOPB supports a maximum input common-mode voltage range of –22V to +60V when operated from a 5V supply, and –4V to +27V at 3.3V supply. This enables direct high-side shunt monitoring in 48V industrial systems without external level-shifting circuitry. The device maintains ≥90dB CMRR across this full range at 1kHz, ensuring reliable noise rejection in noisy switching environments.

How does the LMP8602QMAX/NOPB achieve bidirectional current sensing?

The LMP8602QMAX/NOPB achieves bidirectional current sensing via its dedicated OFFSET pin, which sets the output midscale reference (e.g., 2.5V at 5V supply). When the shunt current reverses direction, the output swings symmetrically above and below this reference - enabling accurate measurement of both sourcing and sinking current with a single-supply system. No external op-amps or level shifters are required.

Can external filtering be added to the LMP8602QMAX/NOPB, and how?

Yes - the LMP8602QMAX/NOPB provides direct access to its internal signal path via A1 (preamplifier output) and A2 (buffer input) pins. An external RC low-pass filter can be inserted between these pins to attenuate high-frequency PWM noise before final 5× amplification. The trimmed 100kΩ A1 output impedance ensures predictable filter cutoff frequency without calibration, supporting robust EMI mitigation in motor drive and converter applications.

What is the gain accuracy and temperature stability of the LMP8602QMAX/NOPB?

The LMP8602QMAX/NOPB has a total gain of 50× with ±0.5% initial error and ±2.8ppm/°C gain drift over –40°C to +125°C. Its preamplifier contributes 10× gain (±0.05% error) and the buffer adds 5× (±0.25% error), ensuring consistent scaling across temperature. This stability enables direct interfacing with 12-bit ADCs without software gain compensation in most industrial applications.

Is the LMP8602QMAX/NOPB pin-compatible with other members of the LMP860x family?

Yes - the LMP8602QMAX/NOPB shares identical SOIC-8 pinout and electrical interface with LMP8601 and LMP8603, differing only in internal buffer gain (5× vs 2× or 10×). This allows hardware reuse across designs requiring different gain ranges, with only minor firmware or ADC scaling adjustments needed. All variants support the same common-mode range, OFFSET functionality, and A1/A2 filter interface.