Texas Instruments LMP8602MA/NOPB

Overview

LMP8602MA/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 LMP8602MA/NOPB datasheet, LMP8602MA/NOPB pinout, LMP8602MA/NOPB application, or LMP8602MA/NOPB equivalent, key selection criteria include common-mode voltage tolerance, gain accuracy over temperature, CMRR ≥90dB, and support for single-supply bidirectional sensing with external offset control.

Technical Context

The LMP8602MA/NOPB employs a proprietary chopping level-shift input stage that translates high common-mode voltages within supply rails before amplification. Its two-stage architecture separates preamplification (gain = 10×, A1 output) from buffered output gain (5×), enabling external RC filtering between A1 and A2 terminals.

This architecture delivers precise differential signal amplification while maintaining robust fault tolerance: input resistors limit current during large differential transients, and the OFFSET pin allows DC biasing for true bidirectional operation without dual supplies.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 4.90mm × 6.00mm body, gull-wing leads, RoHS-compliant lead finish.

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 LMP8602MA/NOPB uniquely combines ultra-wide common-mode range, dedicated OFFSET pin for single-supply bidirectional operation, and accessible A1/A2 nodes for custom signal conditioning-making it optimal for high-reliability 48V server and industrial power systems where design flexibility and fault resilience are essential.

Availability

LMP8602MA/NOPB is available at Aetrix Electronics and suitable for server power monitoring, industrial DC/DC converters, and linear motor control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LMP8602MA/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 amplifiers and power management ICs.

The LMP860x family was designed specifically for high-accuracy, high-common-mode current sensing in server, telecom, and industrial power systems-emphasizing fault tolerance, low drift, and flexible signal conditioning.

FAQ

What is the maximum common-mode voltage the LMP8602MA/NOPB supports?

The LMP8602MA/NOPB supports a common-mode input voltage range of –22V to +60V when operated from a 5V supply. This specification is validated across the full industrial temperature range (–40°C to +125°C) and enables direct sensing in 48V systems with negative rail fault conditions. Operation at 3.3V supply reduces the range to –4V to +27V.

How does the OFFSET pin enable bidirectional current sensing in the LMP8602MA/NOPB?

The OFFSET pin on the LMP8602MA/NOPB accepts a DC voltage (0V to VS) to set the output's zero-current reference level. When biased at VS/2 (e.g., 2.5V with 5V supply), the OUT pin outputs mid-rail (2.5V) at zero shunt current, allowing positive and negative current flow to produce proportional above/below-mid-rail output voltages-enabling true bidirectional measurement with a single supply.

Can the LMP8602MA/NOPB drive an ADC directly without external buffering?

Yes, the LMP8602MA/NOPB can drive most SAR and sigma-delta ADCs directly. Its output is rail-to-rail capable (0–4.98V at 5V supply), stable with up to 100pF capacitive load, and features low output impedance. For high-resolution ADCs (>16-bit), adding a small series resistor (10–50Ω) is recommended to isolate trace capacitance and prevent peaking.

What is the purpose of the A1 and A2 pins on the LMP8602MA/NOPB?

The A1 pin provides the 10× preamplified signal with a built-in 100kΩ series resistor; the A2 pin feeds this signal into the 5× output buffer. Connecting an RC network between A1 and A2 implements in-line filtering-allowing designers to suppress high-frequency noise or limit bandwidth without affecting gain accuracy or common-mode rejection.

Does the LMP8602MA/NOPB require external components for basic operation?

No external components are required for basic unidirectional operation: only VS, GND, +IN/–IN, OFFSET (tied to GND or VS/2), and OUT connections are needed. However, for bidirectional sensing, OFFSET must be actively biased; for EMI suppression or bandwidth control, an RC network between A1 and A2 is recommended; and for driving long traces or heavy capacitive loads, a small series resistor at OUT improves stability.