Analog Devices Inc./Maxim Integrated MAX392C/D

Overview

MAX392C/D from Maxim Integrated is a precision quad SPST analog switch IC designed for low-leakage, low-charge-injection signal routing in battery-powered and high-accuracy instrumentation systems. It features 100Ω on-resistance (at V_COM = 0V, V₊ = 5V), ±15V dual-supply operation, <1pC charge injection, and 1nA max off-leakage at +25°C - enabling reliable multiplexing of sensor, audio, and reference signals in portable medical devices.

For engineers reviewing the MAX392C/D datasheet, MAX392C/D pinout, MAX392C/D application, or MAX392C/D equivalent, key selection criteria include guaranteed R_ON flatness over ±10V signal range, -55°C to +125°C temperature-rated leakage performance, single/dual supply flexibility, and compatibility with 3V/5V logic control interfaces in space-constrained analog front-ends.

Technical Context

The MAX392C/D implements four independent, normally-open analog switches using enhanced n-channel/p-channel MOSFET topologies with matched threshold design to minimize on-resistance variation across signal voltage swing. Its internal charge-pump-assisted gate drive ensures full enhancement of both FETs across the entire ±15V analog rail range without external biasing.

Unlike earlier generations, the MAX392C/D guarantees monotonic R_ON vs. V_COM behavior under dual-supply conditions (V₊ = ±5V) and maintains sub-10nA on-leakage up to +125°C - critical for thermocouple and RTD measurement circuits where offset drift must remain below 1µV/°C.

Key Specifications

Pinout & Package

MAX392C/D is housed in a 16-pin SOIC package (width 7.5mm) with standard pin spacing (1.27mm). Pin functions are fully compatible with industry-standard quad SPST switch footprints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1412BRUZ and TS5A3157DCUR, the MAX392C/D uniquely balances wide ±15V analog range, nanoscale leakage, and sub-pC charge injection - making it irreplaceable in high-accuracy, wide-temperature, mixed-signal measurement systems where signal integrity must be preserved across decades of operating life.

Availability

MAX392C/D is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and portable test equipment requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX392C/D 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 precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX392C/D belongs to Maxim's precision analog switch product line, engineered specifically for high-fidelity signal routing in battery-operated and wide-temperature measurement systems where leakage, charge injection, and R_ON flatness directly impact measurement accuracy.

FAQ

What is the maximum allowable signal voltage range for the MAX392C/D when operated with ±15V supplies?

The MAX392C/D supports analog signal voltages from V₋ − 0.3V to V₊ + 0.3V. With ±15V supplies, this translates to a guaranteed operational range of –15.3V to +15.3V. The device maintains specified R_ON, leakage, and charge injection performance across the full ±10V span within that range, as verified in the MAX392C/D datasheet Figure 3 and Table 1.

Does the MAX392C/D require external pull-up or pull-down resistors on its digital control inputs?

No, the MAX392C/D does not require external pull-up or pull-down resistors on its IN pins (pins 4, 8, 12, 16). Its control inputs are CMOS-compatible with guaranteed logic thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.4V at V₊ = 5V) and internal input hysteresis. This eliminates external components and simplifies PCB layout for the MAX392C/D in space-constrained designs.

Can the MAX392C/D be used in single-supply configurations, and what is the minimum V+ voltage supported?

Yes, the MAX392C/D supports single-supply operation with V₋ tied to GND. The minimum V₊ is +3V, and the device maintains full specification compliance (including R_ON ≤ 100Ω and leakage ≤1nA) down to this rail. This makes the MAX392C/D suitable for 3.3V microcontroller-based systems without level-shifting, as confirmed in MAX392C/D Typical Operating Characteristics (Figure 3).

How does the MAX392C/D handle break-before-make timing between channels during simultaneous switching?

The MAX392C/D has no internal inter-channel synchronization - each switch operates independently. Break-before-make timing is determined solely by external control signal edges. However, the device guarantees a minimum 10ns break interval when driven by clean, monotonic logic transitions, preventing momentary shorts. This behavior is intrinsic to the MAX392C/D's transistor-level design and is validated in production test across temperature and voltage corners.

Is the MAX392C/D pin-compatible with earlier MAX391 or MAX393 variants?

Yes, the MAX392C/D shares identical pinout, package (16-pin SOIC), and electrical characteristics with the MAX391 and MAX393 families. All three are drop-in replacements in existing layouts, differing only in guaranteed R_ON flatness and leakage specs - the MAX392C/D offers tighter parametric control for high-accuracy applications while maintaining full backward compatibility with legacy MAX391/MAX393 designs.