Analog Devices Inc./Maxim Integrated DG201ADJ

Overview

DG201ADJ from Maxim Integrated is a quad SPST normally closed analog switch designed for high-voltage bipolar signal routing in precision instrumentation and military-grade systems. It operates across ±4.5V to ±18V supplies, delivers 115Ω typical R_DS(ON) at ±15V, achieves 450ns max turn-off time, and supports analog signal ranges from –15V to +15V - enabling use in guidance control and head-up display video switching.

For engineers reviewing the DG201ADJ datasheet, DG201ADJ pinout, DG201ADJ application, or DG201ADJ equivalent, key selection criteria include guaranteed break-before-make timing, no VL supply requirement, nonlatching behavior under powered-down conditions with live inputs, and compatibility with CMOS/TTL logic levels in harsh-temperature environments.

Technical Context

The DG201ADJ implements monolithic CMOS architecture with four independent SPST switches, each featuring internal protection diodes that clamp input signals exceeding V+ or V– by up to 2V (with 25mA current limit). Its logic inputs accept standard TTL/CMOS voltage thresholds and drive low-leakage switches without requiring a third VL supply - unlike legacy DG211 variants.

Switching performance is characterized by 450ns maximum turn-off and 600ns maximum turn-on times under ±15V operation with 1kΩ load and 35pF capacitance. Analog channel isolation exceeds 70dB, crosstalk remains below –90dB, and charge injection is limited to 20pC - critical for sample-and-hold and multiplexer applications demanding minimal signal disturbance.

Key Specifications

Pinout & Package

DG201ADJ is housed in a 16-pin plastic DIP package (0.300" wide), rated for –40°C to +85°C operation, with through-hole mounting and industry-standard lead pitch (0.100").

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4617CSE and ADG1412BRUZ, the DG201ADJ uniquely balances bipolar supply operation, no-VL simplicity, military-grade temperature range, and proven reliability in guidance and radio systems - without requiring PCB rework or additional power conditioning.

Availability

DG201ADJ is available at Aetrix Electronics and suitable for Winchester disk drives, test equipment, guidance and control systems, and military radios requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG201ADJ 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 demanding industrial, automotive, and defense applications.

The DG201ADJ belongs to Maxim's precision analog switch product line, engineered specifically for robust signal routing in high-voltage, wide-temperature, and mission-critical systems where reliability outweighs raw speed or ultra-low resistance.

FAQ

What is the operating temperature range for DG201ADJ?

The DG201ADJ is rated for –40°C to +85°C operation, making it suitable for industrial and military environments. This rating is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The "DJ" suffix explicitly denotes the –40°C to +85°C grade, distinct from commercial (C), extended (E), or military (AA/AK) variants. DG201ADJ maintains full electrical specifications across this full range without derating.

Does DG201ADJ require a VL supply voltage?

No, DG201ADJ does not require a VL supply voltage. Unlike the original manufacturer's DG211, Maxim eliminated the need for a third logic supply rail. The DG201ADJ accepts standard CMOS/TTL logic levels directly at its IN1–IN4 pins while operating from only V+ and V– supplies. This simplifies power architecture and reduces component count in portable and embedded systems using the DG201ADJ.

What is the maximum analog signal voltage supported by DG201ADJ?

The DG201ADJ supports analog signals from –15V to +15V when operated at ±15V supplies, as specified in the VANALOG parameter. Its absolute maximum ratings allow V_S or V_D to swing from V– to V+, meaning the full analog range tracks the supply rails. For example, at ±12V supplies, the usable analog range is –12V to +12V. This rail-to-rail capability is intrinsic to the DG201ADJ's CMOS process and internal protection structure.

Is DG201ADJ pin-compatible with DG211DJ?

No, DG201ADJ is not pin-compatible with DG211DJ. Although both are 16-pin plastic DIP quad SPST switches, their pin functions differ: DG201ADJ assigns IN1–IN4 to pins 1, 8, 9, 16, whereas DG211DJ places IN1–IN4 on pins 1, 2, 3, 4. Additionally, DG201ADJ has a N.C. on pin 12, while DG211DJ uses pin 12 for S3. Interchanging them would cause logic misrouting and signal path failure - the DG201ADJ requires dedicated layout.

What is the typical R_DS(ON) of DG201ADJ at ±15V supplies?

The typical R_DS(ON) of DG201ADJ at ±15V supplies is 135Ω to 155Ω, as shown in the "R_DS(ON) AT ANALOG SIGNAL LEVEL" graph on page 6 of the datasheet. The Electrical Characteristics table specifies a maximum of 175Ω under V_D = ±10V, V_IN = 0.8V, I_S = 1mA conditions. This low on-resistance ensures minimal voltage drop and thermal drift in precision analog signal paths using the DG201ADJ.