Analog Devices Inc./Maxim Integrated DG445ETE+

Overview

DG445ETE+ from Maxim Integrated is a quad, normally open (NO), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in bipolar or single-supply systems. It features 85Ω max on-resistance, <5nA off-leakage at +85°C, 10pC max charge injection, 250ns max tON, and operates from ±4.5V to ±20V or +10V to +30V supplies - ideal for test equipment and audio signal routing.

For engineers reviewing the DG445ETE+ datasheet, DG445ETE+ pinout, DG445ETE+ application, or DG445ETE+ equivalent, key selection criteria include guaranteed R_ON matching (4Ω max), rail-to-rail analog signal handling (±15V), TTL/CMOS logic compatibility, ESD tolerance (2000V min), and thin QFN thermal performance for high-density PCB layouts.

Technical Context

The DG445ETE+ uses a 44V silicon-gate process to support wide supply ranges and robust signal integrity. Its four independent SPST switches are controlled by active-high logic inputs (IN1–IN4), with separate V+, V−, GND, and VL pins enabling flexible logic-level interfacing (TTL or CMOS).

Switching behavior is bidirectional with symmetrical on-resistance and flatness (9Ω max over full signal range). Charge injection (10pC max) and off-isolation rejection (60dB) are specified under bipolar ±15V operation, ensuring low distortion in sample-and-hold and communication systems.

Key Specifications

Pinout & Package

Package: 16-pin Thin QFN (5mm × 5mm, 0.8mm height) with exposed pad connected to V+ for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with ADG1414BRUZ and TS5A3157DCKR, the DG445ETE+ uniquely delivers guaranteed R_ON matching (4Ω), bipolar ±20V operation, and -40°C to +85°C qualification - making it the sole option among the three for thermally demanding, high-voltage, multi-channel precision routing.

Availability

DG445ETE+ is available at Aetrix Electronics and suitable for test equipment, audio signal routing, sample-and-hold circuits, and military radio systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for DG445ETE+ 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

Maxim Integrated (now part of Analog Devices) designs high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DG445ETE+ belongs to Maxim's precision analog switch product line, engineered for low distortion, high reliability, and wide supply flexibility in mission-critical signal routing applications.

FAQ

What is the maximum analog signal voltage range supported by the DG445ETE+?

The DG445ETE+ supports an analog signal range of ±15V when operated with bipolar ±15V supplies. This rail-to-rail capability is guaranteed per the datasheet's Electrical Characteristics table and applies across the full operating temperature range (-40°C to +85°C). The device maintains this range only when V+ and V− are within their absolute maximum ratings (V+ ≤ 44V referenced to V−), and signal voltages remain between V− and V+.

Does the DG445ETE+ require a separate logic supply voltage, and how is it configured?

Yes, the DG445ETE+ requires a dedicated logic supply (VL) pin to set input threshold levels. VL can be connected to either +5V for TTL-compatible operation (VINH = 2.4V, VINL = 0.8V) or directly to V+ for CMOS-compatible thresholds. This flexibility allows seamless interfacing with both legacy 5V microcontrollers and modern low-voltage logic families without external level shifters.

How does the DG445ETE+ handle power-off conditions, and what precautions apply?

The DG445ETE+ switches are in the open (off) state when unpowered. However, analog terminals (D/S) must never exceed V+ or V−, even with power off - internal ESD diodes will conduct if violated, risking latch-up or damage. Proper supply sequencing (V+ first, then VL and V−) is recommended; if not feasible, external series diodes on supply lines provide overvoltage protection while reducing usable analog range by ~1V.

Is the DG445ETE+ pin-compatible with older DG445 variants like DG445DY or DG445DJ?

No - the DG445ETE+ uses a 16-pin Thin QFN package (5mm × 5mm), whereas DG445DY and DG445DJ use 16-pin narrow SO and plastic DIP packages respectively. Pin functions are identical (per Pin Description table), but physical layout, thermal pad connection (QFN EP → V+), and solder-reflow profiles differ significantly. PCB redesign is required for replacement; no drop-in substitution is possible.

What is the guaranteed on-resistance matching specification for the DG445ETE+, and under what conditions does it apply?

The DG445ETE+ guarantees on-resistance matching of 4Ω maximum between its four channels. This specification is valid only under bipolar-supply operation (e.g., V+ = +15V, V− = −15V) at TA = +25°C, with VD = ±10V and IS = −10mA, as explicitly stated in Note 4 of the datasheet. It is not guaranteed under single-supply conditions or across the full temperature range.