Analog Devices Inc./Maxim Integrated DG408DY+T

Overview

DG408DY+T from Maxim Integrated is a precision 1-of-8 CMOS analog multiplexer/demultiplexer designed for bidirectional signal routing in high-fidelity data-acquisition and test systems. It delivers guaranteed 100Ω max on-resistance, 8Ω max channel-to-channel matching, 15pC max charge injection, and operates across ±5V to ±20V dual supplies or +5V to +30V single supply - enabling rail-to-rail analog signal handling up to ±15V in industrial instrumentation.

For engineers reviewing the DG408DY+T datasheet, DG408DY+T pinout, DG408DY+T application, or DG408DY+T equivalent, key selection criteria include on-resistance flatness (9Ω max), input off-leakage (<5nA at +85°C), enable-controlled break-before-make switching, TTL/CMOS-compatible digital inputs, and ESD robustness (>2000V per MIL-STD-883 Method 3015.7).

Technical Context

The DG408DY+T implements a fully decoded 3-bit address logic (A0–A2) with active-low enable (EN) to select one of eight bidirectional analog channels (S1–S8) to a common drain (D). Its CMOS transmission-gate architecture ensures symmetrical conduction and low distortion across the full analog signal range (±15V typical with ±15V supplies).

It features integrated overvoltage protection diodes clamping digital/analog pins to V+ and V−, supports unbalanced supplies (e.g., +24V/−5V), and maintains guaranteed performance over −40°C to +85°C - validated by 100% hot-temperature leakage testing and design-guaranteed charge injection and timing parameters.

Key Specifications

Pinout & Package

DG408DY+T is housed in a 16-pin narrow SO (Small Outline) package, 3.9mm body width, with standard 1.27mm pitch and gull-wing leads - compatible with IPC-7351B SOIC-N-16 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A23157DGSR, DG408DY+T uniquely combines wide supply flexibility (±5V to ±20V), guaranteed low charge injection (15pC), and industrial temperature rating - making it the only option supporting precision ±15V data acquisition without external level-shifting or buffering.

Availability

DG408DY+T is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and avionics guidance systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG408DY+T 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, automotive, and communications markets.

The DG408DY+T belongs to Maxim's precision analog switch family, engineered specifically for low-distortion, low-leakage signal routing in demanding data-acquisition and test environments where parameter guarantees - not just typicals - are mandatory.

FAQ

What is the maximum analog signal voltage range supported by DG408DY+T?

DG408DY+T supports an analog signal range from V− to V+, enabling rail-to-rail operation. With ±15V dual supplies, it handles ±15V signals; with +12V/0V single supply, it supports 0V to +12V. The absolute maximum analog voltage is limited by the supply rails - never exceeding V− − 0.3V or V+ + 0.3V per absolute maximum ratings.

Is DG408DY+T pin-compatible with the original DG408?

Yes, DG408DY+T is explicitly specified as a pin-compatible plug-in upgrade for the industry-standard DG408. Its pinout, package outline (16-pin narrow SO), and logic interface (A0/A1/A2/EN) match exactly - allowing direct replacement without PCB modification or firmware changes.

Does DG408DY+T require external pull-up resistors on address or enable pins?

No, DG408DY+T does not require external pull-ups. Its digital inputs (A0, A1, A2, EN) are TTL/CMOS compatible with defined thresholds (VAL ≤ 0.8V for logic low, VAH ≥ 2.4V for logic high) and exhibit low input current (±1.0µA max), allowing direct connection to microcontroller GPIO or FPGA outputs.

How does DG408DY+T perform at elevated temperatures?

DG408DY+T is rated for −40°C to +85°C operation. Input off-leakage is guaranteed <5nA at +85°C, on-resistance increases predictably with temperature (see Figure TOC-02), and all key parameters - including charge injection and channel matching - are design-guaranteed across the full range, not just tested at +25°C.

Can DG408DY+T operate with unbalanced supplies like +24V and −5V?

Yes, DG408DY+T supports unbalanced supplies. The datasheet explicitly states operation with configurations such as +24V/−5V, provided the difference between V+ and V− does not exceed +44V and both remain within absolute maximum ratings (V+ ≤ V− + 44V, V− ≥ −0.3V). This enables flexible integration into mixed-rail industrial power domains.