Texas Instruments LMP8602MMX/NOPB

Overview

LMP8602MMX/NOPB from Texas Instruments is a fixed-gain, bidirectional current-sense amplifier with –22V to +60V input common-mode range at 5V supply, 50× total gain, ±1mV max input offset voltage, and in-line filter capability via A1/A2 pins. It enables precision shunt-based current monitoring in high-voltage DC/DC converters and server power stages.

For engineers reviewing the LMP8602MMX/NOPB datasheet, LMP8602MMX/NOPB pinout, LMP8602MMX/NOPB application, or LMP8602MMX/NOPB equivalent, key selection criteria include common-mode voltage tolerance, gain accuracy over temperature, CMRR performance at 1kHz, and support for single-supply bidirectional sensing with external offset control.

Technical Context

The LMP8602MMX/NOPB implements a two-stage architecture: a chopping-level-shift preamplifier (gain = 10×, ±1mV V_OS, ±10μV/°C TCV_OS) followed by an output buffer (gain = 5×), with the inter-stage node accessible at A1 and A2 for external filtering or gain adjustment. Its input resistors enable fault-tolerant operation under large differential transients.

It operates from a single 3.3V or 5V supply, supports unidirectional and bidirectional sensing via the OFFSET pin, and achieves ≥90dB CMRR (min) across –20V to +60V V_CM at 5V supply - critical for accurate measurement in noisy, high-side motor or server rail monitoring.

Key Specifications

Pinout & Package

Package: DGK (8-pin VSSOP, 3.00 mm × 4.90 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and MAX40056ATA+T, the LMP8602MMX/NOPB uniquely combines 50× gain, –22 V to +60 V V_CM, built-in OFFSET control for true bidirectional operation, and accessible A1/A2 nodes - making it optimal for space-constrained, thermally demanding server and industrial power systems requiring calibrated zero-current output.

Availability

LMP8602MMX/NOPB is available at Aetrix Electronics and suitable for server power monitoring, industrial DC/DC converters, linear motor control, and field transmitter designs requiring stable component supply and long-term production continuity.

Supply support for LMP8602MMX/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 for industrial, automotive, and communications markets.

The LMP860x family was designed specifically for high-accuracy, high-common-mode current sensing in power conversion and motor control systems - emphasizing low offset drift, robust fault tolerance, and flexible signal conditioning.

FAQ

What is the maximum common-mode voltage supported by the LMP8602MMX/NOPB?

The LMP8602MMX/NOPB supports a maximum input common-mode voltage of +60 V and a minimum of –22 V when operating from a 5 V supply, as specified in the Absolute Maximum Ratings and Recommended Operating Conditions tables. This range enables direct high-side sensing on 48 V and 54 V power rails without external level-shifting circuitry. Operation outside this range may cause permanent device damage or degraded performance.

How does the OFFSET pin function in the LMP8602MMX/NOPB?

The OFFSET pin in the LMP8602MMX/NOPB sets the DC output level to enable bidirectional current sensing with a single positive supply. When tied to VS/2 (e.g., 2.5 V at 5 V supply), it centers the output at mid-scale, allowing positive and negative current flow through the shunt to produce corresponding above- and below-mid-scale output voltages. This eliminates the need for a negative supply rail while maintaining full measurement resolution for both charge and discharge directions.

Can the LMP8602MMX/NOPB be used with a 3.3 V supply?

Yes, the LMP8602MMX/NOPB operates with a 3.3 V supply, supporting a reduced common-mode input range of –4 V to +27 V and maintaining its 50× gain, ±1 mV input offset voltage, and 60 kHz bandwidth. Supply current drops to 1 mA typical, making it suitable for low-power applications. However, the full –22 V to +60 V V_CM range is only guaranteed at 5 V supply per the datasheet's Recommended Operating Conditions.

What is the purpose of the A1 and A2 pins on the LMP8602MMX/NOPB?

The A1 and A2 pins on the LMP8602MMX/NOPB provide access to the internal preamplifier output (A1) and output buffer input (A2), enabling external signal conditioning. Designers can insert RC filters between these pins to suppress high-frequency noise or adjust gain using passive networks - all while preserving the device's high CMRR and low offset performance. This in-line filter capability is unique to the LMP860x family and not available in most competing current-sense amplifiers.

Does the LMP8602MMX/NOPB require external compensation for stability?

No, the LMP8602MMX/NOPB is internally compensated and remains stable driving capacitive loads up to 100 pF without external compensation components. The datasheet specifies "no sustained oscillations" under this condition with no isolation resistor required. For heavier loads (>100 pF), a series isolation resistor (e.g., 10 Ω–50 Ω) is recommended at the OUT pin to maintain phase margin and prevent peaking or ringing in the step response.