ADC Single SAR 400ksps 12-bit Parallel 24-Pin QSOP

The MAX1290/MAX1292 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, byte-wide parallel interface. The devices operate with a single +5V analog supply and feature a VLOGIC pin that allows them to interface directly with a +2.7V to +5.5V digital supply. Power consumption is only 10mW (VDD = VLOGIC) at a 400ksps max sampling rate. Two software-selectable power-down modes enable the MAX1290/MAX1292 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 MAX1290 has eight input channels and the MAX1292 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 MAX1290/MAX1292 tri-states active-low INT when active-low CS goes high. Refer to MAX1262/MAX1264 if tri-stating active-low INT is not desired. The MAX1290 is available in a 28-pin QSOP package, while the MAX1292 comes in a 24-pin QSOP. For pin-compatible +3V, 12-bit versions, refer to the MAX1291/MAX1293 data sheet.

• 12-Bit Resolution, ±0.5 LSB Linearity
• +5V Single-Supply Operation
• User-Adjustable Logic Level (+2.7V to +5.5V)
• Internal +2.5V Reference
• Software-Configurable Analog Input Multiplexer
  • 8-Channel Single-Ended/4-Channel Pseudo-Differential (MAX1290)
  • 4-Channel Single-Ended/2-Channel Pseudo-Differential (MAX1292)

Software-Configurable Unipolar/Bipolar Analog Inputs

Low Current:

• 2.5mA (400ksps)
• 1.0mA (100ksps)
• 400µA (10ksps)
• 2µA (Shutdown)

Internal 6MHz Full-Power Bandwidth Track/Hold

Byte-Wide Parallel (8 + 4) Interface

Small Footprint:

• 28-Pin QSOP (MAX1290)
• 24-Pin QSOP (MAX1292)