265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

 

Part Number	Replacement	Explanation

Description

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The MAX1265/MAX1267 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 +2.7V to +3.6V analog supply.

Power consumption is only 5.4mW at the maximum sampling rate of 265ksps. Two software-selectable power-down modes enable the MAX1265/MAX1267 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can reduce supply current 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 MAX1265 has six input channels and the MAX1267 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 MAX1265 is offered in a 28-pin QSOP package, while the MAX1267 comes in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1266/MAX1268 data sheet.

MAX1265, MAX1267: Typical Operating Circuits Enlarge+

Key Features

• 12-Bit Resolution, ±0.5 LSB Linearity
• +3V Single-Supply Operation
• Internal +2.5V Reference
• Software-Configurable Analog Input Multiplexer
  • 6-Channel Single Ended/3-Channel Pseudo Differential (MAX1265)
  • 2-Channel Single Ended/1-Channel Pseudo Differential (MAX1267)
• Software-Configurable Unipolar/Bipolar Analog Inputs
• Low Current
  • 1.9mA (265ksps)
  • 1.0mA (100ksps)
  • 400µA (10ksps)
  • 2µA (Shutdown)
• Internal 3MHz Full-Power Bandwidth Track/Hold
• Parallel 12-Bit Interface
• Small Footprint
  • 28-Pin QSOP (MAX1265)
  • 24-Pin QSOP (MAX1267)

Applications/Uses

• Data Acquisition Systems
• Data Logging
• Energy Management
• Industrial Controls Systems
• Patient Monitoring
• Touch Screens