Analog Devices Inc. LTC2965IDD#TRPBF

Overview

LTC2965IDD#TRPBF from Analog Devices is a micropower, high-voltage single-channel voltage monitor IC designed for precise undervoltage/overvoltage supervision in systems with 3.5V–100V supply rails. It features internal 10×/40× resistive dividers, ±1.4% 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 LTC2965IDD#TRPBF datasheet, LTC2965IDD#TRPBF pinout, LTC2965IDD#TRPBF application, or LTC2965IDD#TRPBF equivalent, key selection criteria include input voltage range (3.5V–100V), threshold accuracy (±1.4% max), hysteresis configurability (14–30mV), polarity select capability, and DFN-8 package thermal performance (θJA = 43°C/W).

Technical Context

The LTC2965IDD#TRPBF implements a high-impedance voltage sensing path via internal 70MΩ/200kΩ resistive dividers scaled by RS pin selection (10× or 40×), enabling direct monitoring of up to 98V at VIN while drawing only 3–15µA across its operating range. Its dual comparator reference inputs (INH/INL) accept 0.35V–2.45V common-mode voltages and support external resistor-based threshold programming or built-in hysteresis activation via grounding either INH or INL.

Output logic polarity is controlled by PS pin: grounded for noninverting behavior (OUT low on VIN < INL×range), tied to REF for inverting behavior (OUT low on VIN > INH×range). The 100V-tolerant OUT pin integrates blocking circuitry to prevent back-conduction when pulled up to external voltages ≤100V, and guarantees low state down to VIN ≥ 1.25V regardless of PS configuration.

Key Specifications

Pinout & Package

Package: 8-Lead (3mm × 3mm) Plastic DFN with exposed pad (optional GND connection). Thermal resistance θJA = 43°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2965IDD#TRPBF, MAX6326UT29D3+T offers lower cost and smaller size but sacrifices adjustability and high-voltage operation; TLV809E29DBZR delivers lower quiescent current but cannot directly monitor >6V rails, requiring additional components and layout area.

Availability

LTC2965IDD#TRPBF is available at Aetrix Electronics and suitable for telecom power supervision, automotive battery monitoring, and industrial 24V PLC I/O modules requiring stable component supply across extended temperature ranges.

Supply support for LTC2965IDD#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2965 belongs to Analog Devices' precision voltage supervisor product line, engineered for high-voltage, low-power monitoring in harsh environments where reliability and accuracy across temperature are critical.

FAQ

What is the maximum input voltage the LTC2965IDD#TRPBF can monitor?

The LTC2965IDD#TRPBF supports a VIN monitor range of 3.5V to 98V, selectable via the RS pin: 10× scaling covers 3.5V–24.5V, and 40× scaling covers 14V–98V. Absolute maximum VIN is 140V per Absolute Maximum Ratings, but functional monitoring is limited to 98V to maintain specified accuracy and avoid exceeding internal divider stress limits.

How does the built-in hysteresis work on the LTC2965IDD#TRPBF?

The LTC2965IDD#TRPBF enables built-in hysteresis by grounding either INH (for rising-edge hysteresis) or INL (for falling-edge hysteresis). When INL is grounded, VIN(FALL) = RANGE × (INH – VHYS), where VHYS is 220mV (10×) or 880mV (40×). This eliminates external hysteresis resistors while maintaining precise threshold separation.

Can the LTC2965IDD#TRPBF operate from a 3.5V supply?

Yes, the LTC2965IDD#TRPBF has a minimum operating supply voltage of 3.5V. At this voltage, the internal reference remains stable at 2.402V ±24mV, and the OUT pin delivers VOH ≥ 2.375V (I = –1µA) and VOL ≤ 400mV (I = 500µA), ensuring compatibility with 3.3V logic interfaces.

What is the purpose of the PS pin on the LTC2965IDD#TRPBF?

The PS (Polarity Select) pin configures the logical relationship between VIN and OUT. When PS = GND, the output is noninverting: OUT goes low when VIN falls below the INL×range threshold. When PS = REF (or >1.4V), the output is inverting: OUT goes low when VIN rises above the INH×range threshold - enabling flexible overvoltage or undervoltage detection.

Is the exposed pad on the LTC2965IDD#TRPBF DFN package required to be grounded?

No, the exposed pad on the LTC2965IDD#TRPBF's 8-lead DFN package is optional for grounding. It may be left floating or connected to PCB GND to improve thermal dissipation (reducing θJA from 43°C/W). No electrical connection to internal circuitry exists; grounding solely enhances thermal performance in high-power-density layouts.