Analog Devices Inc. LTC2965IMS#TRPBF

Overview

LTC2965IMS#TRPBF from Analog Devices is a micropower, high-voltage single-channel voltage monitor IC designed for precision undervoltage/overvoltage supervision in systems with 3.5V–100V supply rails. It features internal 10×/40× scalable resistive dividers, ±1.4% max threshold accuracy over temperature, 7µA quiescent current, and a 100V-rated open-drain output with integrated 500kΩ pull-up. It is used in telecom power supplies to detect 24V rail collapse before system reset.

For engineers reviewing the LTC2965IMS#TRPBF datasheet, LTC2965IMS#TRPBF pinout, LTC2965IMS#TRPBF application, or LTC2965IMS#TRPBF equivalent, key selection criteria include VIN monitor range (3.5–98V), built-in hysteresis configuration (INH/INL grounding), polarity inversion via PS pin, and MSOP-16 package compatibility with industrial PCB layouts requiring >0.79mm creepage.

Technical Context

The LTC2965IMS#TRPBF implements a high-impedance voltage sensing path using internal 70MΩ/200kΩ resistive dividers scaled by RS pin selection (10× or 40×), enabling direct monitoring of up to 98V at VIN with sub-µA input bias current. Its dual comparator reference inputs (INH, INL) operate within 0.35V–2.45V common-mode range and set rising/falling thresholds independently via external resistive dividers biased from the 2.402V on-chip REF.

Output logic polarity is configurable via PS pin (GND = noninverting; ≥1.4V = inverting), and built-in hysteresis (14–30mV at INH/INL, scaled to 220mV/880mV at VIN) is enabled by grounding either INH or INL. The 100V-tolerant OUT pin integrates active pull-down and gated 500kΩ pull-up to an internal 3.5–5V supply, eliminating need for external level-shifting transistors.

Key Specifications

Pinout & Package

Package: 16-Lead Plastic MSOP (16-lead, 3mm × 4.9mm body, 0.65mm pitch, exposed pad optional). Pin 1 marked; pin 9 = GND; pins 2–4 and 10–13 = NC; pins 5–8 and 14–16 assigned per function below.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage voltage monitor applications.

Compared with MAX6326US29D3+T and TLV809E29DBZR, the LTC2965IMS#TRPBF uniquely combines 100V tolerance, user-programmable thresholds via INH/INL, internal scaling (10×/40×), and a buffered 2.4V reference-making it the only option supporting accurate, low-power supervision of 24V–48V industrial rails without external components.

Availability

LTC2965IMS#TRPBF is available at Aetrix Electronics and suitable for telecom power systems, industrial PLCs, automotive body controllers, and battery-powered data loggers requiring stable component supply with guaranteed long-term availability.

Supply support for LTC2965IMS#TRPBF 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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2965IMS#TRPBF belongs to Linear's precision voltage supervisor product line, engineered specifically for high-reliability, low-power monitoring of wide-range DC supplies in harsh environments where accuracy, voltage tolerance, and minimal quiescent current are critical.

FAQ

What is the operating temperature range for the LTC2965IMS#TRPBF?

The LTC2965IMS#TRPBF is rated for –40°C to +85°C ambient operation (I-grade). This matches industrial and extended-temperature automotive applications. Its ±1.4% threshold accuracy is guaranteed across this full range, unlike commercial-grade alternatives limited to 0°C–70°C. The MSOP package's θJA of 120°C/W supports reliable thermal performance in enclosed enclosures.

How does the RS pin configure the LTC2965IMS#TRPBF's voltage monitoring range?

The RS pin selects between two internal resistive divider scaling factors: GND sets 10× (monitoring 3.5V–24.5V at VIN), while connecting to REF sets 40× (monitoring 14V–98V at VIN). This choice determines the valid INH/INL voltage window (0.35V–2.45V) and directly impacts threshold accuracy-using the smallest appropriate range (e.g., 10× for 24V rail) maximizes precision by minimizing range error contribution.

Can the LTC2965IMS#TRPBF monitor negative voltages?

Yes-the LTC2965IMS#TRPBF can supervise negative rails using external level-shifting circuitry. Figure 9 in the datasheet shows a validated configuration with an NPN transistor (Q1) that shifts the –15V supply to the VIN pin while protecting the IC from reverse voltage. The OUT signal is then level-shifted to a 5V logic domain, preserving the device's 7µA quiescent current and 100V tolerance in bipolar applications.

What is the purpose of the PS pin on the LTC2965IMS#TRPBF?

The PS (Polarity Select) pin configures the logical relationship between VIN and the OUT signal: grounding PS makes the output noninverting (OUT goes low when VIN falls below INL), while connecting PS to REF or ≥1.4V makes it inverting (OUT goes low when VIN rises above INH). This flexibility allows one device to serve both undervoltage lockout and overvoltage protection roles without redesigning the external circuit.

Does the LTC2965IMS#TRPBF require external components to function?

The LTC2965IMS#TRPBF operates autonomously with only VIN, GND, and a load on OUT-but full functionality requires external resistors to set INH/INL thresholds. A minimal configuration uses three resistors (R1–R3) from REF to INH/INL/GND. For highest accuracy, a precision external reference like LT6656-2.048 can replace the internal REF, reducing total threshold error from ±1.2% to ±0.44% as documented in the datasheet.