Analog Devices Inc. LTC2960IDC-3

Overview

LTC2960IDC-3 from Analog Devices (formerly Linear Technology) is a nano-current, high-voltage two-input voltage supervisor IC designed for multicell battery monitoring and power-rail supervision in space-constrained systems. It features 850nA quiescent current, 2.5V–36V VCC operating range, ±2mV ADJ/IN+ threshold matching, fixed 200ms reset timeout, and active pull-up RST/OUT outputs referenced to DVCC. It is used in battery-powered equipment to trigger controlled shutdown or microprocessor reset upon undervoltage detection.

For engineers reviewing the LTC2960IDC-3 datasheet, LTC2960IDC-3 pinout, LTC2960IDC-3 application, or LTC2960IDC-3 equivalent, key selection criteria include its 200ms fixed reset timeout, DVCC-referenced active pull-up outputs, IN+ input configuration, –40°C to 85°C industrial temperature grade, and compatibility with 1.6V–5.5V logic supplies via the DVCC pin.

Technical Context

The LTC2960IDC-3 implements dual-comparator architecture: one precision 400mV internal reference comparator monitors the ADJ input for reset generation, while a second comparator monitors IN+ for configurable status signaling. Its 200ms reset timeout is hardwired (no RT pin), distinguishing it from -1/-2 variants. The DVCC pin replaces RT and sets output logic swing - enabling active pull-up operation when supplied 1.6V–5.5V, or open-drain behavior when grounded.

It operates across 2.5V–36V VCC with only 850nA supply current at 36V, supports 1.5% max threshold accuracy over temperature, and delivers 20mV IN+ hysteresis (5% of 400mV). Input leakage is ±0.1nA at 420mV, enabling high-impedance resistor divider designs up to 8MΩ without significant error.

Key Specifications

Pinout & Package

Package: 8-lead (2mm × 2mm) plastic DFN (DC8), exposed pad (Pin 9) optional GND connection. Industrial temperature grade (–40°C to 85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326US29D3+ and TPS3808G33DBVR, the LTC2960IDC-3 uniquely combines adjustable dual-threshold monitoring, 850nA quiescent current, and DVCC-referenced active pull-up outputs - making it the only viable option for long-life, multi-rail, and logic-voltage-flexible industrial battery supervision.

Availability

LTC2960IDC-3 is available at Aetrix Electronics and suitable for battery-powered security sensors, automotive cabin controllers, portable medical monitors, and industrial IoT edge nodes requiring stable component supply across extended temperature ranges and ultra-low power consumption.

Supply support for LTC2960IDC-3 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 and maintains its precision analog and power management portfolio. Linear pioneered high-performance voltage supervisors and remains a leader in ultra-low-power monitoring ICs.

The LTC2960 product line was designed specifically for multicell battery and wide-input-voltage supervision in space- and power-constrained applications - emphasizing nano-current operation, flexible threshold configuration, and robust industrial temperature performance.

FAQ

What is the function of the DVCC pin on the LTC2960IDC-3?

The DVCC pin on the LTC2960IDC-3 serves as the logic supply reference for the RST and OUT outputs. When supplied 1.6V–5.5V, it enables active pull-up operation - driving outputs high to DVCC voltage level. Grounding DVCC reconfigures both outputs as open-drain, requiring external pull-up resistors. This dual-mode capability eliminates static current draw in active pull-up mode and supports mixed-voltage system interfacing - a key differentiator of the LTC2960IDC-3 versus earlier variants.

Does the LTC2960IDC-3 support adjustable reset timeout periods?

No, the LTC2960IDC-3 has a fixed 200ms reset timeout period. Unlike the LTC2960-1/LTC2960-2 variants that use the RT pin to select between 15ms and 200ms, the LTC2960IDC-3 replaces the RT pin with DVCC and permanently configures the timeout to 200ms. This is confirmed in the Option Table and Electrical Characteristics table (tRST = 140ms to 280ms, typical 200ms) - making it ideal for applications requiring deterministic, capacitor-free reset timing without pin routing complexity.

Can the LTC2960IDC-3 monitor both overvoltage and undervoltage conditions?

The LTC2960IDC-3 is configured with IN+ input and supports only undervoltage detection on that channel - pulling OUT low when IN+ falls below its threshold plus hysteresis. It does not provide overvoltage monitoring capability on IN+, as that function is reserved for the IN– variants (LTC2960-2/LTC2960-4). However, using external circuitry such as an inverting amplifier or resistor network, the IN+ input can be repurposed to detect rising thresholds - but this requires additional components and is not a native feature of the LTC2960IDC-3.

What is the maximum input voltage allowed at the ADJ, IN+, and IN– pins of the LTC2960IDC-3?

The absolute maximum rating for ADJ, IN+, and IN– pins on the LTC2960IDC-3 is –0.3V to 3.5V. This limit is independent of VCC and must be strictly observed. To monitor voltages above 3.5V (e.g., 12V or 24V rails), external resistor dividers must scale the signal down to ≤3.5V at the pin. For example, a 6V threshold requires a 15:1 divider (6V × 400mV/6V = 400mV), ensuring the pin never exceeds 3.5V even at maximum monitored voltage - a critical design constraint explicitly stated in the Absolute Maximum Ratings table.

How does the manual reset (MR) input behave when released on the LTC2960IDC-3?

When the MR input on the LTC2960IDC-3 is pulled low and then released (returned high), the RST output remains low for the full 200ms reset timeout period before transitioning high - regardless of whether the ADJ input has already risen above threshold. This behavior is confirmed in the Pin Functions description and Timing Diagram: "RST is released after monitored voltage exceeds the reset threshold plus 2.5% hysteresis and after reset timeout period has expired." Thus, MR assertion enforces a minimum 200ms reset hold time, ensuring reliable processor initialization even during fast supply recovery.