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MAX1091：250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

The MAX1091/MAX1093 low-power, 10-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, byte-wide parallel interface. They operate with a single +3V analog supply and feature a VLOGIC pin that allows them to interface directly with a +1.8V to +3.6V digital supply. Power consumption is only 5.7mW (VDD = VLOGIC) at the maximum sampling rate of 250ksps. Two software-selectable power-down modes enable the MAX1091/MAX1093 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can cut supply current to under 10µA at reduced sampling rates. Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1091 has eight input channels and the MAX1093 has four input channels (four and two input channels, 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 MAX1091/MAX1093 tri-states active-low INT when active-low CS goes high. Refer to MAX1061/MAX1063 if tri-stating active-low INT is not desired. The MAX1091 is available in a 28-pin QSOP package, while the MAX1093 is available in a 24-pin QSOP. For pin-compatible +5V, 10-bit versions, refer to the MAX1090/MAX1092 data sheet.

Key Features 10-Bit Resolution, ±0.5 LSB Linearity +3V Single-Supply Operation User-Adjustable Logic Level (+1.8V to +3.6V) Internal +2.5V Reference Software-Configurable, Analog Input Multiplexer 8-Channel Single-Ended/4-Channel Pseudo-Differential (MAX1091) 4-Channel Single-Ended/2-Channel Pseudo-Differential (MAX1093) Software-Configurable, Unipolar/Bipolar Inputs Low Power 1.9mA (250ksps) 1.0mA (100ksps) 400µA (10ksps) 2µA (Shutdown) Internal 3MHz Full-Power Bandwidth Track/Hold Byte-Wide Parallel (8 + 2) Interface Small Footprint: 28-Pin QSOP (MAX1091) 24-Pin QSOP (MAX1093)

MAX1091, MAX1093: Typical Operating Circuit Applications/Uses Data Acquisition Systems Data Logging Energy Management Industrial Controls Systems Patient Monitoring Touch Screens

DataSheet

Parametrics

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