MAX1297:265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

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

The MAX1295/MAX1297 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 MAX1295/MAX1297 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 MAX1295 has six input channels and the MAX1297 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 MAX1295/MAX1297 tri-states active-low INT when active-low CS goes high. Refer to MAX1265/MAX1267 if tri-stating active-low INT is not desired. The MAX1295 is offered in a 28-pin QSOP package, while the MAX1297 comes in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1294/MAX1296 data sheet.

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 (MAX1295)
    • 2-Channel Single-Ended/1-Channel Pseudo-Differential (MAX1297)
  • 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 (MAX1295)
    • 24-Pin QSOP (MAX1297)
Applications/Uses
  • Data Acquisition Systems
  • Data Logging
  • Energy Management
  • Industrial Controls Systems
  • Patient Monitoring
  • Touch Screens
DataSheet
titleDownload file
MAX1295-MAX1297 Data SheetMAX1295-MAX1297.pdf
Parametrics
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1295126265SARµP/12Both2.513.62.51.25-781QSOP/28$8.86 @1k
MAX12972QSOP/24$8.89 @1k
Related Products
  • MAX1267:265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1268:420ksps, +5V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1264:400ksps, +5V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1293:250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1291:250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1296:420ksps, +5V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1294:420ksps, +5V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX1292:400ksps, +5V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
  • MAX196:6-Channel, Multirange, 5V, 12-Bit DAS with 12-Bit Bus Interface and Fault Protection
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1297ACEGNo Longer AvailableMAX1297ACEG+QSOP,;24 pin;54.2 mm²0°C to +70°CNo
MAX1297ACEG+ActiveQSOP,;24 pin;54.2 mm²0°C to +70°CLead Free
MAX1297ACEG+TActiveQSOP,;24 pin;54.2 mm²0°C to +70°CLead Free
MAX1297ACEG-TNo Longer AvailableMAX1297ACEG+TQSOP;24 pin0°C to +70°CSee data sheet
MAX1297AEEGNo Longer AvailableMAX1297AEEG+QSOP,;24 pin;54.2 mm²-40°C to +85°CNo
MAX1297AEEG+ActiveQSOP,;24 pin;54.2 mm²-40°C to +85°CLead Free
MAX1297AEEG+TActiveQSOP,;24 pin;54.2 mm²-40°C to +85°CLead Free
MAX1297AEEG-TNo Longer AvailableMAX1297AEEG+TQSOP;24 pin-40°C to +85°CSee data sheet
MAX1297BCEGNo Longer AvailableMAX1297BCEG+QSOP,;24 pin;54.2 mm²0°C to +70°CNo
MAX1297BCEG+ActiveQSOP,;24 pin;54.2 mm²0°C to +70°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1297BCEG+TActiveQSOP;24 pin0°C to +70°CSee data sheet
MAX1297BCEG-TNo Longer AvailableMAX1297BCEG+TQSOP,;24 pin;54.2 mm²0°C to +70°CNo
MAX1297BEEGNo Longer AvailableMAX1297BEEG+QSOP,;24 pin;54.2 mm²-40°C to +85°CNo
MAX1297BEEG+ActiveQSOP,;24 pin;54.2 mm²-40°C to +85°CLead Free
MAX1297BEEG+TActiveQSOP,;24 pin;54.2 mm²-40°C to +85°CLead Free
MAX1297BEEG-TNo Longer AvailableMAX1297BEEG+TQSOP;24 pin-40°C to +85°CSee data sheet
MAX1295-MAX1297.pdf MAX1297