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MAX1138, MAX1138K, MAX1138L, MAX1138M：2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs

The MAX1136–MAX1139 low-power, 10-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 (MAX1137/MAX1139) or 4.5V to 5.5V (MAX1136/MAX1138) 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 MAX1136/MAX1137 have four analog input channels each, while the MAX1138/MAX1139 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 MAX1137/MAX1139 feature a 2.048V internal reference and the MAX1136/MAX1138 feature a 4.096V internal reference. The MAX1136/MAX1137 are available in an 8-pin µMAX® package. The MAX1138/MAX1139 are available in a 16-pin QSOP package. The MAX1136–MAX1139 are guaranteed over the extended temperature range (-40°C to +85°C). For pin-compatible 12-bit parts, refer to the MAX1236–MAX1239 data sheet. For pin-compatible 8-bit parts, refer to the MAX1036–MAX1039 data sheet.

Key Features High-Speed I²C-Compatible Serial Interface 400kHz Fast Mode 1.7MHz High-Speed Mode Single-Supply 2.7V to 3.6V (MAX1137/MAX1139) 4.5V to 5.5V (MAX1136/MAX1138) Internal Reference 2.048V (MAX1137/MAX1139) 4.096V (MAX1136/MAX1138) External Reference: 1V to VDD Internal Clock 4-Channel Single-Ended or 2-Channel Fully Differential (MAX1136/MAX1137) 12-Channel Single-Ended or 6-Channel Fully Differential (MAX1138/MAX1139) 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 (MAX1136/MAX1137) 16-Pin QSOP (MAX1138/MAX1139)

MAX1136, MAX1137, MAX1138, MAX1139: Typical Operating Circuit Applications/Uses Battery-Powered Test Equipment Handheld Portable Applications Medical Instruments Receive Signal Strength Indicators Solar-Powered Remote Systems System Supervision

DataSheet

Parametrics

Quality and Environmental Data

• MAX1138.pdf

Related Products

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• MAX11606：2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/8-/12-Channel, 2-Wire Serial 10-Bit ADCs
• MAX1086：150ksps, 10-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs in SOT23 and TDFN

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