Texas Instruments TMP513AIDR

Overview

TMP513AIDR from Texas Instruments is a triple-channel temperature and high-side current/power monitor IC integrating local die sensing, three remote diode junction sensors, and a 12-bit ADC-based shunt voltage monitor. It delivers ±1°C remote accuracy (–40°C to +125°C), supports bus voltages up to +26V, reports current in amps and power in watts, and operates from a single +3V to +26V supply. It is used in server power rail monitoring and thermal management of multi-core processors with discrete remote sensing transistors.

For engineers reviewing the TMP513AIDR datasheet, TMP513AIDR pinout, TMP513AIDR application, or TMP513AIDR equivalent, key selection criteria include its triple remote channel support, series resistance cancellation for PCB trace compensation, SMBus-compatible two-wire interface, programmable n-factor correction per channel, and integrated watchdog limits for over/under-temperature and over-current events.

Technical Context

The TMP513AIDR implements a dedicated 12-bit successive-approximation ADC with selectable PGA gains (÷1 to ÷8) and dual-range bus voltage scaling (0–16V or 0–32V). Its remote sensing architecture uses sequential current excitation across three independent DXP/DXN pairs to measure ΔV_BE, enabling temperature calculation with built-in series resistance cancellation up to 3 kΩ and n-factor correction registers at addresses 16h–18h.

It integrates a configurable subregulator supporting three operating modes: Configuration 1 (V+ = 4.5–26V, Filter C = 3.3V, bus range 4.5–26V), Configuration 2 (V+ = 4.5–26V, bus range 0–26V), and Configuration 3 (V+ = 3–5.5V, Filter C = V+, bus range 0–26V). The ALERT pin provides open-drain SMBus alert output controlled via the Alert Mask Register.

Key Specifications

Pinout & Package

Package: SOIC-16 (D package), body size 10.3 mm × 7.5 mm, 1.27 mm pitch, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature and power monitoring applications.

Compared with TMP512AIDR, TMP513AIDR adds a third remote channel for expanded thermal mapping, while compared with INA226AIDR, it trades pure power accuracy for integrated thermal awareness and SMBus-alert-triggered thermal response-making it optimal for compact, thermally constrained systems requiring co-located power and temperature intelligence.

Availability

TMP513AIDR is available at Aetrix Electronics and suitable for server thermal management, industrial power supply monitoring, and telecom rectifier control requiring stable component supply and long-term lifecycle support.

Supply support for TMP513AIDR 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 company specializing in analog and embedded processing technologies, with leadership in precision sensing, power management, and interface solutions.

The TMP513AIDR belongs to TI's temperature and power system monitor product line, designed specifically for simultaneous, high-accuracy thermal and electrical parameter measurement in space-constrained computing and infrastructure equipment.

FAQ

What is the remote temperature accuracy specification for TMP513AIDR over its full operating range?

The TMP513AIDR specifies ±1°C remote temperature accuracy over –40°C to +125°C ambient temperature when used with standard diode-connected transistors (e.g., 2N3906) and ≤3 kΩ series resistance. This accuracy holds without calibration and is confirmed across multiple IC manufacturers' transistors per the SBOS491A datasheet.

How does TMP513AIDR handle series resistance in remote temperature sensing lines?

TMP513AIDR implements automatic series resistance cancellation up to 3 kΩ per remote channel using dual-current excitation and internal computation. This eliminates offset errors caused by PCB trace resistance between the IC and remote transistor, ensuring ±1°C accuracy without external compensation circuits or calibration routines in the TMP513AIDR firmware.

Can TMP513AIDR measure both current and power simultaneously with temperature?

Yes, TMP513AIDR concurrently measures shunt voltage (for current in amps), bus voltage (for volts), and performs real-time multiplication to report instantaneous power in watts-all synchronized with local and three remote temperature readings. All values are accessible via SMBus registers without host CPU intervention beyond read commands.

What are the supported supply configurations for TMP513AIDR's internal subregulator?

TMP513AIDR supports three subregulator configurations: Config 1 (V+ = 4.5–26V, Filter C = 3.3V, bus range 4.5–26V), Config 2 (V+ = 4.5–26V, bus range 0–26V), and Config 3 (V+ = 3–5.5V, Filter C = V+, bus range 0–26V). Minimum capacitor values are 470 nF (Configs 1/2) or 100 nF (Config 3) on the Filter C pin.

Does TMP513AIDR support SMBus Alert Response Protocol (ARP)?

No, TMP513AIDR does not support SMBus ARP. It implements a standard open-drain ALERT output that asserts low when any programmed limit (temperature, current, or voltage) is exceeded. Host software must poll the Alert Status Register or use the ALERT pin as a hardware interrupt trigger-no automatic device addressing or identification via ARP is provided in the TMP513AIDR design.