Analog Devices Inc./Maxim Integrated MAX1204AEAP

Overview

MAX1204AEAP from Maxim Integrated is a 10-bit, 8-channel serial analog-to-digital converter optimized for mixed +5V analog / +3V digital supply systems. It integrates an internal track/hold, 4.096V reference with buffer, SPI/MICROWIRE/TMS320-compatible 4-wire serial interface, and supports unipolar/bipolar input modes. It delivers 133ksps sampling rate with ±0.5 LSB INL and operates from single +5V or dual ±5V analog supplies.

For engineers reviewing the MAX1204AEAP datasheet, MAX1204AEAP pinout, MAX1204AEAP application, or MAX1204AEAP equivalent, key selection considerations include its 3V-tolerant digital I/O (via VL pin), software-configurable power-down modes (<2µA shutdown current), internal reference accuracy (±0.8 ppm/°C gain TC), and compatibility with low-voltage microcontrollers in battery-powered instrumentation and process control.

Technical Context

The MAX1204AEAP employs successive-approximation architecture with integrated track/hold and capacitive DAC. Its analog front-end supports both single-ended (8-channel) and pseudo-differential (4-channel) inputs, with common-mode range from VSS to VDD and input protection diodes rated for (VSS − 0.3V) to (VDD + 0.3V).

It features dual clock operation: external SCLK up to 2MHz drives both data transfer and conversion timing, while internal clock mode decouples conversion timing from host interface-enabling flexible readout at any SCLK rate ≤2MHz after SSTRB asserts high. The VL pin independently sets digital output voltage levels (2.7V–5.25V), enabling direct interfacing with 3V, 3.3V, or 5V logic without level shifters.

Key Specifications

Pinout & Package

MAX1204AEAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, RoHS-compliant and lead-free. Thermal resistance θ_JA = 125°C/W; package dimensions: 7.2mm × 5.3mm × 1.95mm (max height).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit serial ADC applications.

Compared with MAX1204AEAP, MAX1202AEAP+ offers higher resolution in identical packaging for seamless upgrade, while ADS7822U trades internal reference and strobe flexibility for lower unit cost and higher speed-but demands layout changes and external reference management.

Availability

MAX1204AEAP is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, and battery-powered test equipment requiring stable component supply with long-term lifecycle assurance.

Supply support for MAX1204AEAP 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 MAX1204 belongs to Maxim's precision data-acquisition product line, designed specifically for mixed-voltage systems where 3V digital logic must interface reliably with 5V analog signal chains without level-shifting overhead.

FAQ

What is the maximum sampling rate of the MAX1204AEAP?

The MAX1204AEAP achieves a maximum sampling rate of 133ksps when using a 2MHz external serial clock and 15 clock cycles per conversion. This rate is maintained across the full commercial temperature range (0°C to +70°C) and supports accurate acquisition of signals with up to 800kHz full-power bandwidth. The internal clock mode maintains this performance without host timing constraints.

How does the VL pin affect digital interface compatibility for MAX1204AEAP?

The VL pin on the MAX1204AEAP directly sets the high-level output voltage of DOUT and SSTRB, supporting 2.7V to 5.25V logic levels. This allows the MAX1204AEAP to interface natively with 3V, 3.3V, or 5V microcontrollers without external level shifters-critical for preserving signal integrity and reducing BOM count in mixed-supply systems.

Can the MAX1204AEAP operate with only a +5V supply, or does it require dual ±5V?

The MAX1204AEAP operates with either a single +5V analog supply (VDD = +5V, VSS = GND) for unipolar input ranges or dual ±5V supplies (VDD = +5V, VSS = −5V) for bipolar operation. Both configurations are fully supported per datasheet specifications, and the device automatically adapts input range and reference behavior based on VSS connection and control-byte settings.

What is the purpose of the SHDN pin's three-level functionality on the MAX1204AEAP?

The SHDN pin on the MAX1204AEAP provides three distinct operating states: pulled low enables full shutdown (<2µA supply current); left floating configures external REFADJ compensation; pulled high selects internal compensation mode. This eliminates need for additional control lines and simplifies power sequencing in systems requiring dynamic power management.

Does the MAX1204AEAP include an internal reference, and can it be bypassed?

Yes, the MAX1204AEAP includes a precision 4.096V internal reference with buffer amplifier. It can be disabled by tying REFADJ to VDD, allowing use of an external reference applied to the REF pin-providing design flexibility for applications requiring tighter initial accuracy, lower noise, or custom full-scale voltage.