ADC Single SAR 94.4ksps 12-bit Serial 16-Pin QSOP

The MAX1236–MAX1239 low-power, 12-bit, multichannel analog-to-digital converters (ADCs) feature internal track/hold (T/H), voltage reference, clock, and an I²C-compatible 2-wire serial interface. These devices operate from a single supply of 2.7V to 3.6V (MAX1237/MAX1239) or 4.5V to 5.5V (MAX1236/MAX1238) and require only 670µA at the maximum sampling rate of 94.4ksps. Supply current falls below 230µA for sampling rates under 46ksps. AutoShutdown powers down the devices between conversions, reducing supply current to less than 1µA at low throughput rates. The MAX1236/MAX1237 have four analog input channels each, while the MAX1238/MAX1239 have 12 analog input channels each. The fully differential analog inputs are software configurable for unipolar or bipolar, and single-ended or differential operation. The full-scale analog input range is determined by the internal reference or by an externally applied reference voltage ranging from 1V to VDD. The MAX1237/MAX1239 feature a 2.048V internal reference and the MAX1236/MAX1238 feature a 4.096V internal reference. The MAX1236/MAX1237 are available in an 8-pin µMAX package. The MAX1238/MAX1239 are available in a 16-pin QSOP package. The MAX1236–MAX1239 are guaranteed over the extended temperature range (-40°C to +85°C). For pin-compatible 10-bit parts, refer to the MAX1136–MAX1139 data sheet. For pin-compatible 8-bit parts, refer to the MAX1036–MAX1039 data sheet.

• High-Speed I²C-Compatible Serial Interface
  • 400kHz Fast Mode
  • 1.7MHz High-Speed Mode

Single-Supply

• 2.7V to 3.6V (MAX1237/MAX1239)
• 4.5V to 5.5V (MAX1236/MAX1238)

Internal Reference

• 2.048V (MAX1237/MAX1239)
• 4.096V (MAX1236/MAX1238)

External Reference: 1V to V_DD

Internal Clock

4-Channel Single-Ended or 2-Channel Fully Differential (MAX1236/MAX1237)

12-Channel Single-Ended or 6-Channel Fully Differential (MAX1238/MAX1239)

Internal FIFO with Channel-Scan Mode

Low Power

• 670µA at 94.4ksps
• 230µA at 40ksps
• 60µA at 10ksps
• 6µA at 1ksps
• 0.5µA in Power-Down Mode

Software-Configurable Unipolar/Bipolar

Small Packages

• 8-Pin µMAX (MAX1236/MAX1237)
• 16-Pin QSOP (MAX1238/MAX1239)