Analog Devices Inc./Maxim Integrated MAX40080ANC+T

Overview

The MAX40080ANC+T from Analog Devices is a high-precision, bidirectional digital current-sense amplifier with integrated 12-bit ADC, I²C/SMBus interface, programmable ±10mV/±50mV input range, 5µV input offset voltage, and -0.1V to +36V input common-mode range. It enables accurate low-power current monitoring in server backplanes and telecom PA control.

For engineers reviewing the MAX40080ANC+T datasheet, MAX40080ANC+T pinout, MAX40080ANC+T application, or MAX40080ANC+T equivalent, key selection criteria include its programmable sample rate (15ksps–1Msps), wake-up current threshold, 64-cell FIFO, alert output with configurable response time, and dual sensing of current and bus voltage up to 36V.

Technical Context

The MAX40080ANC+T integrates a precision current-sense amplifier (CSA) and a 12-bit signed ADC (13-bit including sign) into a single die, supporting simultaneous current and voltage measurement via shared I²C interface. Its CSA features ultra-low 5µV offset and 0.2% gain error, enabling use of sub-1mΩ sense resistors without sacrificing accuracy at low currents.

It implements smart power management: auto-shutdown when I²C is inactive, programmable low-power sampling (as low as 0.0625 conversions/s), and wake-up on current threshold violation. The device supports standard-mode (1MHz) and high-speed-mode (3.4MHz) I²C, with PEC support and configurable alert response timing.

Key Specifications

Pinout & Package

MAX40080ANC+T is packaged in a 12-bump Wafer-Level Package (WLP) with 0.4mm pitch, footprint code N121D1+1S, and specified for -40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA238IRGER and MAX40081ANC+T, the MAX40080ANC+T uniquely supports true ground-sensing (-0.1V), dual current/voltage telemetry, and programmable ±10mV/±50mV ranges-making it optimal for compact, battery-aware, and safety-critical power monitoring where flexibility and low-offset accuracy are essential.

Availability

MAX40080ANC+T is available at Aetrix Electronics and suitable for server backplanes, telecom equipment, and industrial control systems requiring stable component supply, extended temperature operation (-40°C to +125°C), and long-term production continuity.

Supply support for MAX40080ANC+T 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX40080ANC+T belongs to the MAX4008x family of digital current-sense amplifiers, designed specifically for high-accuracy, low-power, and space-constrained power telemetry in next-generation infrastructure and edge devices.

FAQ

What is the minimum input common-mode voltage supported by the MAX40080ANC+T?

The MAX40080ANC+T supports an input common-mode voltage as low as -0.1V, enabling true ground-sensing configurations where the shunt resistor is placed on the low side of the load. This capability is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, and distinguishes it from alternatives like the MAX40081ANC+T, which requires ≥0.1V. The -0.1V rating allows direct measurement of return-path currents without level-shifting circuitry.

Does the MAX40080ANC+T support both current and voltage measurement simultaneously?

Yes, the MAX40080ANC+T performs concurrent current and voltage measurement using dedicated input channels: RS+/RS- for differential current sensing and VS for single-ended bus voltage sensing (attenuated 30:1). Both measurements are digitized by the same 12-bit ADC and accessible via separate I²C registers. The block diagram and Pin Description confirm independent VS and RS+/- terminals, and the Electrical Characteristics table specifies distinct parameters for current-sense gain error and voltage-buffer gain error.

What is the maximum I²C clock frequency supported by the MAX40080ANC+T?

The MAX40080ANC+T supports I²C standard mode up to 1MHz and high-speed mode up to 3.4MHz. This is explicitly stated in the "I2C TIMING" sections of the datasheet, with separate timing tables for each mode. The device implements HS-mode engagement per I²C specification, including required timing parameters (tHD:STA = 160ns, tLOW = 160ns, etc.), and supports PEC for enhanced data integrity in noisy environments.

How does the FIFO function in the MAX40080ANC+T, and what is its depth?

The MAX40080ANC+T includes a 64-entry FIFO that stores sequential current and voltage conversion results. Each entry holds both current and voltage data, and the FIFO operates autonomously-filling without host intervention. The FIFO Alarm flag asserts when ≥60 entries are filled, and the FIFO Overflow flag triggers on overflow. These functions are documented in the Status Register description and Table 7 (Thresholds and Wake-Up Current registers), enabling efficient burst reads and eliminating data loss during host latency.

Can the MAX40080ANC+T operate from a 1.8V supply, and what is its typical active current draw?

Yes, the MAX40080ANC+T is fully specified for operation from 1.71V to 1.98V, with typical active supply current of 2700–3500µA across -40°C to +125°C. This is verified in the "POWER SUPPLY" section of the Electrical Characteristics table. The device's low-voltage compatibility aligns with modern FPGA and microcontroller I/O domains, and its active current is optimized for integration into power-sensitive infrastructure systems without requiring level-shifting or auxiliary regulators.