Analog Devices Inc./Maxim Integrated MAX1202ACAP+

Overview

MAX1202ACAP+ from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) designed for mixed 5V analog / 3V digital systems. It features an integrated track/hold, internal 4.096V reference, SPI/MICROWIRE-compatible 4-wire interface, 133ksps sampling rate, and operates from single +5V or dual ±5V supplies. It enables high-accuracy data acquisition in battery-powered medical instruments and industrial process control.

For engineers reviewing the MAX1202ACAP+ datasheet, MAX1202ACAP+ pinout, MAX1202ACAP+ application, or MAX1202ACAP+ equivalent, key selection considerations include its 20-pin SSOP package, ±0.5 LSB INL (A-grade), software-configurable unipolar/bipolar inputs, VL-adjustable 3V/3.3V/5V digital output levels, and shutdown current below 10 µA - critical for low-power embedded sensing and portable instrumentation.

Technical Context

The MAX1202ACAP+ uses successive-approximation architecture with an on-chip track/hold circuit that acquires input signals in ≤1.5 µs. Its analog front-end supports both 8-channel single-ended and 4-channel pseudo-differential configurations, with channel selection controlled via a programmable 8-bit serial command word.

It implements dual clocking modes: internal clock (1.7 MHz typical) or external serial clock up to 2 MHz, where SCLK directly governs conversion timing. The internal reference buffer (enabled by default) delivers 4.096 V ±30 ppm/°C (A-grade) and is adjustable via REFADJ; the VL pin independently sets digital output swing between 2.7 V and 5.25 V.

Key Specifications

Pinout & Package

MAX1202ACAP+ is housed in a 20-pin shrink small-outline package (SSOP), 0.65 mm pitch, with exposed pad not electrically connected. Package dimensions: 7.2 mm × 5.3 mm × 1.75 mm (max height).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit serial ADC applications.

Compared with ADS7822U and MAX11126ETE+, the MAX1202ACAP+ uniquely combines internal 4.096V reference, true bipolar input support (via VSS = –5V), and VL-independent 3V/5V digital I/O - making it optimal for mixed-supply industrial and medical platforms requiring minimal external components and flexible power architecture.

Availability

MAX1202ACAP+ is available at Aetrix Electronics and suitable for medical instrumentation, industrial process monitoring, and battery-powered test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX1202ACAP+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX1202ACAP+ belongs to Maxim's precision data-acquisition ADC family, engineered for low-power, mixed-voltage embedded systems where accuracy, integration, and supply flexibility are critical design constraints.

FAQ

What is the reference voltage source for MAX1202ACAP+?

The MAX1202ACAP+ integrates a precision 4.096 V internal reference with ±30 ppm/°C temperature coefficient (A-grade). This reference is buffered and accessible at the REF pin; it can be adjusted ±1.5% via the REFADJ pin. No external reference is required unless higher initial accuracy or custom full-scale is needed - unlike the MAX1203, which mandates external reference. The internal reference simplifies layout and reduces BOM cost in the MAX1202ACAP+.

Does MAX1202ACAP+ support both unipolar and bipolar input ranges?

Yes, the MAX1202ACAP+ supports both unipolar (0 V to VREF) and bipolar (–VREF/2 to +VREF/2) input ranges. Selection is made via the UNI/BIP bit (bit 3) in the 8-bit serial control word. When VSS = 0 V, unipolar mode applies; when VSS = –5 V, bipolar mode becomes active. The internal reference and track/hold maintain specified INL and THD performance across both modes, as verified in the datasheet's electrical characteristics tables.

What package type and lead finish does MAX1202ACAP+ use?

The MAX1202ACAP+ is supplied in a 20-pin shrink small-outline package (SSOP) with 0.65 mm lead pitch and Pb-free/RoHS-compliant matte tin plating (+ suffix denotes compliance). Its dimensions are 7.2 mm × 5.3 mm × 1.75 mm (max height), and it features a non-connected exposed pad. This SSOP variant (MAX1202ACAP+) differs from the PDIP version (MAX1202ACPP+) and is optimized for automated assembly and compact PCB layouts.

How does the VL pin affect digital interface operation of MAX1202ACAP+?

VL sets the high-level output voltage for DOUT and SSTRB pins, accepting 2.7 V to 5.25 V. This allows the MAX1202ACAP+ to drive 3V, 3.3V, or 5V logic directly - eliminating level shifters in mixed-voltage systems. When VL = 3.3 V, VOH ≥ 2.8 V and VOL ≤ 0.4 V at 3 mA sink, meeting standard 3.3V CMOS thresholds. The VL supply is independent of VDD and VSS, preventing digital noise from modulating analog performance.

Can MAX1202ACAP+ operate with only a +5V supply, or is dual ±5V required?

The MAX1202ACAP+ operates fully from a single +5 V analog supply (VDD = +5 V, VSS = GND), supporting unipolar input ranges. Dual ±5 V supplies (VDD = +5 V, VSS = –5 V) are optional and enable bipolar input operation (±2.048 V full-scale). Both configurations are supported without hardware changes - only VSS connection and control-word configuration differ. The device's absolute maximum ratings and electrical specs are validated across both supply schemes.