Microchip Technology EMC1704-2-AP-TR

Overview

EMC1704-2-AP-TR from Microchip Technology is a high-side current-sense IC with integrated 1°C-accurate temperature monitoring for up to three external diodes and an internal sensor. It delivers bi-directional current measurement (±1% accuracy), real-time power calculation via source voltage sensing (3V–24V bus range), and hardware-based instantaneous current peak detection. It serves in notebook/desktop power management systems where precise thermal and load monitoring is required for CPU/GPU rail supervision.

For engineers reviewing the EMC1704-2-AP-TR datasheet, EMC1704-2-AP-TR pinout, EMC1704-2-AP-TR application, or EMC1704-2-AP-TR equivalent, this page provides verified specifications, QFN-16 package details, SMBus 2.0 interface behavior, peak detection configuration, and validated alternative parts for thermal-current co-monitoring designs.

Technical Context

The EMC1704-2-AP-TR implements dual-path analog front-end architecture: one 11-bit ADC for current sense voltage (SENSE+/-) with programmable integration time (82ms–2.6s), and separate 13–15-bit ADCs for temperature channels. Its hardware peak detector (exclusive to EMC1704-2 variants) uses DUR_SEL/TH_SEL resistor inputs to set duration (1–128ms) and threshold (±12.5mV to ±200mV) without firmware intervention.

Temperature measurement employs Resistance Error Correction (REC), Beta Compensation for 45nm/65nm CPU diodes, and automatic diode-type detection-including anti-parallel diode support. SMBus 2.0 communication includes block read/write, pin-selectable address, and ALERT/THERM dual-fault outputs with maskable and non-maskable thresholds.

Key Specifications

Pinout & Package

EMC1704-2-AP-TR is housed in a RoHS-compliant 16-pin QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per DS20005239A Figure 1.2 and Table 1.1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current and multi-channel temperature monitoring applications.

Compared with INA233AIRGTT and MAX31785AETL+, the EMC1704-2-AP-TR uniquely integrates hardware-based peak detection, REC, and Beta Compensation-making it the only option capable of autonomous, high-fidelity thermal-current co-monitoring for advanced computing platforms without external support circuitry.

Availability

EMC1704-2-AP-TR is available at Aetrix Electronics and suitable for notebook computers, industrial motor drives, and embedded edge AI accelerators requiring stable component supply and long-term production continuity.

Supply support for EMC1704-2-AP-TR 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

Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and interface ICs, with ISO/TS 16949-certified manufacturing and design facilities.

The EMC1704 product line was designed specifically for high-accuracy, co-located current and temperature monitoring in computing and industrial power systems-emphasizing hardware autonomy, diode-model fidelity, and SMBus interoperability.

FAQ

What distinguishes EMC1704-2-AP-TR from the EMC1704-1 variant?

The EMC1704-2-AP-TR features a 16-pin QFN package and includes hardware-based peak detection controlled by DUR_SEL and TH_SEL resistor inputs-functionality absent in the 14-pin SOIC EMC1704-1. It also supports all EMC1704-2-specific registers (e.g., Product Features Register) and offers identical current accuracy (±1%), temperature performance (±1°C), and SMBus 2.0 compliance. The EMC1704-2-AP-TR is the only variant with true autonomous peak flagging independent of host firmware.

Does EMC1704-2-AP-TR support anti-parallel diode configurations?

Yes, EMC1704-2-AP-TR explicitly supports anti-parallel diode connections across all three external diode channels (DP1/DN1, DP2/DN2, DP3/DN3), as documented in Section 4.7.1 of DS20005239A. This allows use of low-cost dual-diode packages and improves layout flexibility in tight spaces-particularly valuable in laptop motherboard designs where trace routing is constrained.

How does Resistance Error Correction (REC) improve temperature accuracy in EMC1704-2-AP-TR?

Resistance Error Correction (REC) in EMC1704-2-AP-TR measures and subtracts the voltage drop across PCB trace resistance between the IC and remote diode, preventing systematic temperature offset. As specified in Section 4.6.1, REC improves effective accuracy by up to 2.5°C in layouts with >50mΩ trace resistance-critical for maintaining ±1°C diode measurement integrity in high-density computing boards.

Can EMC1704-2-AP-TR operate from the monitored bus voltage?

Yes, EMC1704-2-AP-TR supports bus-powered operation across its full 3V–24V input range, as confirmed in Section 4.2 ("VDD Biasing Options") of DS20005239A. When VDD is tied to the monitored bus, the device draws supply current directly-eliminating need for auxiliary LDOs in simple implementations. Internal regulation maintains stable core voltage regardless of bus fluctuations.

What is the function of the THERM pin on EMC1704-2-AP-TR?

The THERM pin on EMC1704-2-AP-TR is a dedicated, non-maskable open-drain output that asserts low during critical overtemperature, overvoltage, or overcurrent events-bypassing software-configurable limits. As defined in Section 4.5, it provides hardware-level safety interlock capability, enabling immediate system shutdown or power-gating without MCU involvement, which is essential for protecting CPUs, FPGAs, and power stages from thermal runaway.