Analog Devices Inc./Maxim Integrated MAX196ACAI

Overview

The MAX196ACAI from Maxim Integrated is a multirange, 12-bit data-acquisition system (DAS) with six software-programmable analog input channels, single +5V supply operation, ±10V input range capability, and 100ksps throughput rate. It integrates a 5MHz track/hold, internal 4.096V reference, fault-protected multiplexer, and 12-bit parallel µP interface - designed for industrial control and automated test systems requiring high dynamic range and sensor interfacing without dual supplies.

For engineers reviewing the MAX196ACAI datasheet, MAX196ACAI pinout, MAX196ACAI application, or MAX196ACAI equivalent, this page delivers verified specifications, SSOP-28 package mapping, real-world use scenarios in medical instrumentation and robotics, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The MAX196ACAI employs successive approximation architecture with integrated track/hold circuitry, supporting both internal and external clock modes (100kHz–2.0MHz) and internal/external acquisition control. Its programmable input ranges (±10V, ±5V, 0V to +10V, 0V to +5V) are selected via D3/D4 bits in the 8-bit control byte, enabling direct interfacing with ±12V/±15V and 4mA–20mA sensors while maintaining 12-bit resolution and 1/2 LSB linearity.

It features two power-down modes: STBYPD retains reference buffer operation for fast wake-up, while FULLPD reduces supply current to 6µA; both preserve fault protection up to ±16.5V on all six analog inputs even with VDD = 0V. The device uses TTL/CMOS-compatible digital I/O and supports three-state 12-bit parallel output (D11–D0) synchronized by INT, WR, RD, and CS signals.

Key Specifications

Pinout & Package

MAX196ACAI is housed in a 28-pin SSOP (Shrink Small Outline Package), 55% smaller in area than wide SO, with 0.65mm lead pitch and exposed pad not present. Pin functions are electrically identical across DIP/SO/SSOP/Ceramic SB variants per Maxim's pin compatibility guarantee.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multirange, 12-bit data-acquisition applications.

Compared with ADS7816U and MAX1166EAP+, the MAX196ACAI uniquely combines ±10V input capability, internal 4.096V reference, fault protection, and parallel µP interface in a single +5V system - making it irreplaceable in legacy industrial DAQ upgrades requiring minimal hardware changes.

Availability

MAX196ACAI is available at Aetrix Electronics and suitable for industrial-control systems, robotics, and medical instrumentation requiring stable component supply across extended product lifecycles and obsolescence-sensitive programs.

Supply support for MAX196ACAI 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) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.

The MAX196ACAI belongs to Maxim's precision data-acquisition product line, engineered for single-supply, multirange analog-to-digital conversion in harsh environments - targeting applications where sensor interfacing, fault resilience, and µP compatibility are primary design constraints.

FAQ

What is the operating temperature range for the MAX196ACAI?

The MAX196ACAI is specified for 0°C to +70°C ambient operation, matching the 'C' grade designation in Maxim's ordering nomenclature. This range is validated across all electrical parameters including INL (±1/2 LSB), throughput (100ksps), and reference stability (±15ppm/°C). The device remains functional outside this range but without guaranteed performance compliance per its datasheet specifications.

Does the MAX196ACAI require an external clock to operate?

No - the MAX196ACAI supports both internal and external clock modes. In internal mode, a capacitor (CCLK) from CLK pin to ground sets the SAR conversion frequency (e.g., 100pF yields ~1.56MHz). External clock mode accepts 100kHz–2.0MHz TTL/CMOS signals. Clock mode is selected via D6/D7 bits in the control byte, and the device powers up in external clock mode by default.

How does the MAX196ACAI handle overvoltage conditions on its analog inputs?

The MAX196ACAI provides ±16.5V overvoltage protection on all six analog input channels (CH0–CH5), active even during power-down or when VDD = 0V. This protection is implemented via internal resistive networks that limit current without damaging the input multiplexer or track/hold circuitry. A fault on one channel does not affect conversion accuracy of the selected channel.

Can the MAX196ACAI interface directly with a 3.3V microprocessor?

Yes - all digital inputs (WR, RD, CS, CLK, D7–D0) are TTL/CMOS compatible with VIH = 2.4V min and VIL = 0.8V max, allowing direct connection to 3.3V µPs when VDD = 5V. However, digital outputs (D11–D0, INT) swing rail-to-rail (0V to VDD), so level-shifting is required if the µP cannot tolerate 5V inputs. The three-state outputs prevent bus contention during idle states.

What is the purpose of the REFADJ pin on the MAX196ACAI?

The REFADJ pin serves two roles: (1) as an input for external reference adjustment - applying 2.4V–4.18V here generates a buffered 4.096V output at REF via 1.6384× gain; (2) as a disable control - tying REFADJ to VDD disables the internal reference buffer, allowing direct use of an external reference applied to the REF pin. A 0.01µF capacitor to AGND is mandatory for stability in either configuration.