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MAX1294：420ksps, +5V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

Smallest, Low-Power, Parallel-Output 12-Bit ADCs

The MAX1294/MAX1296 low-power, 12-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed 12-bit parallel interface. They operate with a single +5V analog supply. Power consumption is only 10mW at the maximum sampling rate of 420ksps. Two software-selectable power-down modes enable the MAX1294/MAX1296 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can reduce supply below 10µA at lower sampling rates. Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1294 has six input channels and the MAX1296 has two (three input channels and one input channel, respectively, when in pseudo-differential mode). Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications or for other circuits with demanding power-consumption and space requirements. The MAX1294/MAX1296 tri-states active-low INT when active-low CS goes high. Refer to MAX1266/MAX1268 if tri-stating active-low INT is not desired. The MAX1294 is offered in a 28-pin QSOP package, while the MAX1296 is available in a 24-pin QSOP. For pin-compatible +3V, 12-bit versions, see the MAX1295/MAX1297.

Key Features 12-Bit Resolution, ±0.5 LSB Linearity Single +5V Operation Internal +2.5V Reference Software-Configurable Analog Input Multiplexer 6-Channel Single-Ended/3-Channel Pseudo-Differential (MAX1294) 2-Channel Single-Ended/1-Channel Pseudo-Differential (MAX1296) Software-Configurable Unipolar/Bipolar Analog Inputs Low Current 2.8mA (420ksps) 1.0mA (100ksps) 400µA (10ksps) 2µA (Shutdown) Internal 6MHz Full-Power Bandwidth Track/Hold Parallel 12-Bit Interface Small Footprint 28-Pin QSOP (MAX1294) 24-Pin QSOP (MAX1296)

MAX1294, MAX1296: Typical Operating Circuits Applications/Uses Data Acquisition Systems Data Logging Energy Management Industrial Controls Systems Patient Monitoring Touch Screens

DataSheet

Parametrics

Design kits & evaluation modules

• MAX1294EVKIT

Quality and Environmental Data

• MAX1294.pdf

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