14-Bit, 4-Channel, Software-Programmable, Multiranging, Simultaneous-Sampling ADC

The MAX1338 14-bit, analog-to-digital converter (ADC) offers four simultaneously sampled, fully differential input channels, with independent track-and-hold (T/H) circuitry for each channel. The input channels are individually software programmable for input ranges of ±10V, ±5V, ±2.5V, and ±1.25V. The input channels feature fault tolerance to ±17V. The internal T/H circuits have a 16ns aperture delay and 100ps aperture-delay matching.

A 14-bit parallel bus provides the conversion result with a maximum per-channel output rate of 150ksps (600ksps for all four channels). The MAX1338 has an on-board oscillator and 2.5V internal reference. An external clock and/or reference can also be used.

The MAX1338 operates from a +5V supply for analog inputs and digital core. The device operates from a +2.7V to +5.25V supply for the digital I/O lines. The MAX1338 features two power-saving modes: standby mode and shutdown mode. Standby mode allows rapid wake-up and reduces quiescent current to 4mA (typ), and shut-down mode reduces sleep current to less than 10µA (typ).

The MAX1338 is available in an 8mm x 8mm x 0.8mm, 56-pin, thin QFN package. The device operates over the extended -40°C to +85°C temperature range.

Applications

* Motor Control: 3-Phase Voltage, Current, and Power Measurement * Multiple-Channel Data Recorders * Optical Communication Equipment * Vibration Analysis

* 150ksps Sample Rate per Channel

* All Four Input Channels Simultaneously Sampled

* 16ns Aperture Delay

* 100ps Aperture-Delay Matching

* Channel-Independent Software-Selectable Input Range: ±10V, ±5V, ±2.5V, ±1.25V

* ±17V Fault-Tolerant Inputs

* Dynamic Performance at 10kHz Input

* SNR: 77dB

* SINAD: 76dB

* SFDR: 98dBc

* THD: -83dBc

* DC Performance

* INL: ±2 LSB

* DNL: ±1 LSB

* Offset Error: ±4 LSB

* Gain Error: ±0.1% FSR

* 14-Bit Parallel Interface

* Internal Clock and Reference Voltage

* +5V Analog and Digital Supplies

* +2.7V to +5.25V Digital I/O Supply

* 56-Pin Thin QFN Package (8mm x 8mm x 0.8mm)