Analog Devices Inc./Maxim Integrated MAX1308ECM+T

Overview

The MAX1308ECM+T from Maxim Integrated is a 12-bit, 8-channel simultaneous-sampling analog-to-digital converter (ADC) with ±5V input range and ±16.5V fault-tolerant inputs. It achieves 456ksps per channel throughput across all eight channels, features 8ns aperture delay and 100ps channel-to-channel track-and-hold matching, and operates from +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies - ideal for multiphase motor control and power-grid synchronization systems.

For engineers reviewing the MAX1308ECM+T datasheet, MAX1308ECM+T pinout, MAX1308ECM+T application, or MAX1308ECM+T equivalent, this page delivers verified specifications including bipolar ±5V input range, 48-pin LQFP package, internal/external clock support, ±1 LSB INL, and 84dBc SFDR at 500kHz - critical for precision industrial data acquisition design.

Technical Context

The MAX1308ECM+T implements independent track-and-hold circuitry per channel to enable true simultaneous sampling across all eight analog inputs. Its 20MHz T/H bandwidth supports high-fidelity capture of fast transients in motor phase currents or grid voltage waveforms.

Conversion timing is synchronized via either an internal 15MHz clock or external clock up to 20MHz; the device outputs 12-bit results on a bidirectional 20MHz parallel bus with EOC/EOLC handshaking signals. Internal +2.5V reference or external +2.0V to +3.0V reference options provide flexibility in system-level voltage scaling and noise immunity.

Key Specifications

Pinout & Package

The MAX1308ECM+T is housed in a 48-pin 7mm × 7mm LQFP package with exposed thermal pad (RoHS-compliant, lead-free).

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 MAX1308ECM+T offers the only combination of ±5V native input range, parallel 12-bit interface, internal reference, and 456ksps/channel throughput in a compact 48-pin LQFP - making it optimal for cost-constrained, space-limited industrial motor drives requiring deterministic timing.

Availability

The MAX1308ECM+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, long-term lifecycle support, and traceable sourcing.

Supply support for MAX1308ECM+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, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX1308ECM+T belongs to Maxim's high-performance simultaneous-sampling ADC family targeting industrial automation and energy infrastructure - engineered for robust operation in noisy, high-voltage environments with minimal external components.

FAQ

What is the maximum fault voltage the MAX1308ECM+T analog inputs can withstand?

The MAX1308ECM+T analog inputs (CH0–CH7) are rated for ±16.5V fault tolerance relative to AGND. This specification is guaranteed per Absolute Maximum Ratings and applies regardless of whether the device is powered or unpowered. It enables direct connection to industrial sensors and transducers without additional clamping circuitry in most surge-immunity test conditions (e.g., IEC 61000-4-4 Level 3). The MAX1308ECM+T maintains functionality after exposure, provided operating conditions return within normal ranges.

Does the MAX1308ECM+T support both internal and external reference configurations?

Yes, the MAX1308ECM+T supports both internal and external reference modes. In internal mode, it uses a trimmed +2.5V bandgap reference with 30ppm/°C drift and 2.475V–2.525V tolerance. In external mode, REF and REFMS pins accept a common +2.0V to +3.0V source, with 5kΩ input resistance and 15pF capacitance. The MAX1308ECM+T automatically adapts its reference path based on connection - no register writes or configuration pins are required.

What is the minimum acquisition time required for accurate conversion on the MAX1308ECM+T?

The MAX1308ECM+T specifies a minimum CONVST pulse width low (acquisition time) of 0.1µs under typical conditions, though the datasheet permits up to 1000µs depending on input signal slew rate and source impedance. For ±5V full-scale signals with ≤100Ω source impedance, 0.5µs ensures <1LSB error. The internal T/H capacitor droop limits maximum acquisition time to ~1ms. Accurate timing is enforced by the tACQ parameter in the Timing Characteristics table, and must be respected in hardware or firmware timing loops.

How does the MAX1308ECM+T handle channel selection and conversion sequencing?

The MAX1308ECM+T uses dedicated CHSHDN pins (per channel) and a global CONVST strobe to control sampling. All enabled channels sample simultaneously upon CONVST falling edge; conversion proceeds in fixed order (CH0–CH7), with EOLC signaling completion of the last channel. Channel enable/disable is static - no serial command or register access is involved. This hardware-driven approach ensures deterministic latency and eliminates software-induced jitter, making the MAX1308ECM+T suitable for hard real-time control loops.

Is the MAX1308ECM+T pin-compatible with other devices in the MAX130x family?

Yes, the MAX1308ECM+T shares identical 48-pin LQFP pinout and footprint with MAX1304ECM+, MAX1305ECM+, MAX1306ECM+, MAX1309ECM+, and MAX1310ECM+. All devices use the same AVDD/AGND/DVDD/DGND distribution, REF/REFMS/COM/REF+/MSV pin assignments, and parallel bus layout. However, input range differs: MAX1308ECM+ is ±5V, while MAX1304ECM+ is 0 to +5V and MAX1312ECM+ is ±10V - requiring corresponding changes to front-end signal conditioning and reference configuration.