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MAX1238

Maxim
Part Number MAX1238
Manufacturer Maxim
Description 12-Bit ADCs
Published May 6, 2005
Detailed Description 19-2333; Rev 7; 5/10 MAX1236–MAX1239 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit AD...
Datasheet PDF File MAX1238 PDF File

MAX1238
MAX1238

Overview
19-2333; Rev 7; 5/10 MAX1236–MAX1239 2.
7V to 3.
6V and 4.
5V to 5.
5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs General Description 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 16pin 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.
Applications Handheld Portable Applications Medical Instruments Battery-Powered Test Equipment Solar-Powered Remote Systems Received-Signal-Strength Indicators System Supervision Selector Guide PART INPUT CHANNELS INTERNAL REFERENCE (V) SUPPLY VOLTAGE (V) INL (LSB) MAX1236 MAX1237 MAX1238 MAX1239 4 4 12 12 4.
096 2.
048 4.
096 2.
048 4.
5 to 5.
5 2.
7 to 3.
6 4.
5 to 5.
5 2.
7 to 3.
6 ±1 ±1 ±1 ±1 Features ♦ High-Spe...


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