Analog Devices Inc./Maxim Integrated MAX1304ECM+T

Overview

MAX1304ECM+T from Maxim Integrated is a 12-bit, 8-channel simultaneous-sampling analog-to-digital converter with 0 to +5V input range, ±6V fault-tolerant inputs, 456ksps per channel throughput at full 8-channel operation, and internal +2.5V reference. It features independent track-and-hold circuitry, 20MHz input bandwidth, and operates from +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies - used in multiphase motor control and power-grid synchronization systems.

For engineers reviewing the MAX1304ECM+T datasheet, MAX1304ECM+T pinout, MAX1304ECM+T application, or MAX1304ECM+T equivalent, this page delivers verified specifications including simultaneous sampling performance, fault-tolerant input voltage limits, parallel interface timing, internal reference accuracy, and LQFP-48 package compatibility for industrial data acquisition designs.

Technical Context

The MAX1304ECM+T implements eight independent track-and-hold amplifiers enabling true simultaneous sampling across all channels, with 8ns aperture delay and 100ps channel-to-channel T/H matching. Its architecture supports both internal (15MHz) and external (up to 20MHz) clocking, delivering 456ksps/channel throughput when all eight channels are active.

It uses a 12-bit bidirectional parallel interface (D0–D11) with asynchronous control signals (CONVST, RD, WR, CS), and integrates dual reference paths: REF/REFMS accept external 2.0V–3.0V references or enable internal +2.5V buffered reference with dedicated REF+, COM, and REF− terminals for precision unipolar conversion.

Key Specifications

Pinout & Package

MAX1304ECM+T is housed in a 48-pin 7mm × 7mm lead(Pb)-free RoHS-compliant LQFP package with exposed thermal pad (EP). Pin assignments are validated per Maxim's official datasheet Rev 6 (19-3052).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606BSTZ and ADS8588SIPM, the MAX1304ECM+T offers optimal balance of 12-bit precision, 456ksps/channel throughput, 0–5V native input compatibility, and low 57mA power consumption - making it uniquely suited for cost-sensitive, space-constrained industrial motor drives and power analyzers.

Availability

MAX1304ECM+T is available at Aetrix Electronics and suitable for multiphase motor control, power-grid synchronization, and SIN/COS position encoder applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for MAX1304ECM+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 precision analog and mixed-signal ICs for industrial, automotive, and communications markets with emphasis on reliability and integration.

The MAX1304ECM+T belongs to Maxim's high-speed simultaneous-sampling ADC product line, engineered specifically for real-time industrial control and power quality monitoring where channel correlation and timing determinism are critical.

FAQ

What is the maximum fault voltage tolerance on the analog inputs of the MAX1304ECM+T?

The MAX1304ECM+T analog inputs (CH0–CH7) tolerate voltages from -6V to +6V relative to AGND, independent of the 0 to +5V operating input range. This ±6V fault tolerance protects against transient overvoltages in industrial environments without requiring external clamping components. The specification is guaranteed across the full -40°C to +85°C temperature range and applies to all eight channels of the MAX1304ECM+T.

Does the MAX1304ECM+T support external reference voltage, and what is the acceptable range?

Yes, the MAX1304ECM+T supports external reference voltage applied to the REF and REFMS pins. The valid range is +2.0V to +3.0V, with typical operation at +2.5V. When using an external reference, both REF and REFMS must be driven to the same voltage, and the internal reference buffer is disabled. This allows system-level calibration and improved temperature stability when paired with a precision external reference IC. The MAX1304ECM+T maintains ±1 LSB INL across this full external reference range.

What is the minimum acquisition time required for accurate conversions with the MAX1304ECM+T?

The MAX1304ECM+T requires a minimum CONVST pulse width (acquisition time) of 100ns, though the datasheet specifies a maximum of 1000µs to accommodate slow input settling. For optimal performance with 0–5V signals, acquisition time should be set to ≥200ns to ensure full settling of the internal track-and-hold amplifier. This value is independent of clock source (internal or external) and applies uniformly across all eight channels of the MAX1304ECM+T.

Can the MAX1304ECM+T operate with a 3.3V digital supply while using a 5V analog supply?

Yes, the MAX1304ECM+T supports independent digital and analog supplies: DVDD may be set to +3.3V while AVDD remains at +5V. The digital I/Os (D0–D11, RD, WR, CS) are fully compatible with 3.3V logic levels, with VIH = 0.7 × DVDD and VIL = 0.3 × DVDD. This dual-supply flexibility simplifies interface design with modern 3.3V microcontrollers while preserving analog performance - a key capability confirmed for the MAX1304ECM+T in its Absolute Maximum Ratings and Electrical Characteristics tables.

What is the channel-to-channel isolation performance of the MAX1304ECM+T at 500kHz?

The MAX1304ECM+T provides 80dB to 86dB channel-to-channel isolation at fIN = 500kHz, measured under standard conditions (VAVDD = +5V, VDVDD = +3V, internal reference, TA = +25°C). This isolation level prevents crosstalk between simultaneously sampled channels - critical for accurate differential measurements in power monitoring. The specification is guaranteed across the full operating temperature range and applies directly to the MAX1304ECM+T device, not just the family.