Analog Devices Inc./Maxim Integrated DG212CY-T

Overview

DG212CY-T from Maxim Integrated is a quad SPST normally open CMOS analog switch designed for precision signal routing in bipolar supply systems. It operates across ±4.5V to ±18V supplies, delivers 115Ω typical on-resistance at ±15V, guarantees break-before-make switching, and supports bidirectional analog signal flow with no added offset-used in programmable gain amplifiers and automatic test equipment.

For engineers reviewing the DG212CY-T datasheet, DG212CY-T pinout, DG212CY-T application, or DG212CY-T equivalent, this page provides verified electrical parameters, SOIC-16 package mapping, real-world timing behavior (tON = 460ns), leakage performance (IS(OFF) < ±5nA), and functionally comparable alternatives for industrial signal-path redesigns.

Technical Context

The DG212CY-T implements four independent CMOS transmission gates with inverted logic control inputs-distinguishing it from the DG202/DG211 family. Each switch features guaranteed break-before-make operation and maintains constant RDS(ON) over its full ±15V analog signal range, enabling accurate signal routing without gain distortion.

It eliminates the need for a third logic supply (VL), unlike legacy equivalents, while maintaining TTL/CMOS logic compatibility and nonlatching behavior-even when power supplies are disconnected with input signals present. Its monolithic low-power design targets portable and space-constrained instrumentation.

Key Specifications

Pinout & Package

DG212CY-T is packaged in a 16-pin SOIC (SO) with 0.150" body width, RoHS-compliant lead finish, and operating temperature range of –40°C to +85°C. Pin 1 is IN1; pins 2, 15, 10, 7 are D1–D4; pins 3, 14, 11, 6 are S1–S4; pin 4 is V−; pin 5 is GND; pin 12 is N.C.; pin 13 is V+.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG212A and MAX4612, DG212CY-T offers the optimal balance of ultra-low leakage (<±0.02nA), no-VL simplicity, and proven fault tolerance-making it preferred for industrial ATE and precision programmable gain stages where reliability and minimal BOM overhead are prioritized.

Availability

DG212CY-T is available at Aetrix Electronics and suitable for programmable gain amplifiers, automatic test equipment, and communications systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG212CY-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, communications, and computing applications.

The DG212CY-T belongs to Maxim's precision analog switch product line, engineered specifically for robust, low-leakage signal routing in bipolar-supply test and measurement systems where reliability under fault conditions is mandatory.

FAQ

What is the maximum analog signal voltage supported by DG212CY-T?

DG212CY-T supports an analog signal range of ±15V when operated at ±15V supplies. Its absolute maximum ratings allow VS or VD to swing from V− to V+, meaning the full signal swing is bounded by the applied V+ and V− rails-up to ±18V continuous operation. This enables direct interfacing with industrial ±10V or ±15V sensor and DAC outputs without level shifting.

Does DG212CY-T require a separate logic supply voltage (VL)?

No, DG212CY-T does not require a VL supply. Unlike earlier analog switches such as the ADG212A, DG212CY-T integrates logic-level translation internally and operates directly from standard CMOS/TTL input voltages (0V/5V) while powered only by V+ and V−. This eliminates the need for a third supply rail, simplifying power architecture and reducing board space in compact instrumentation designs.

What is the logic polarity of DG212CY-T control inputs?

DG212CY-T features inverted logic control: a logic low (≤0.8V) turns the corresponding switch ON, and a logic high (≥2.4V) turns it OFF. This distinguishes it from the DG202/DG211 family and must be accounted for in firmware or logic design. The pinout labels IN1–IN4 reflect this inversion, and no external inverters are needed if the controller supports active-low enable signaling.

Can DG212CY-T be used in a single-supply configuration?

DG212CY-T is specified for dual-supply operation (±4.5V to ±18V) and is not characterized for true single-supply use. While it may function with V− grounded and V+ = +9V to +36V, the analog signal range becomes asymmetric (0V to V+ − 1V), RDS(ON) increases significantly, and key specs like leakage and isolation are not guaranteed. For single-supply applications, consider purpose-built alternatives like the MAX4617 or ADG1412.

How does DG212CY-T behave when power supplies are removed but analog signals remain present?

DG212CY-T is guaranteed nonlatching under this condition: even with V+ and V− disconnected while analog signals are applied to S or D pins, the device will not enter a destructive latch-up state. Internal protection structures limit current to safe levels (<25mA), preserving functionality after power restoration-making it suitable for hot-swap and modular ATE systems where signal integrity must survive supply sequencing faults.