General Description

The MAX1226/MAX1228/MAX1230 are serial 12-bit analog-to-digital converters (ADCs) with an internal reference and an internal temperature sensor. These devices feature on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown?. The maximum sampling rate is 300ksps using an external clock. The MAX1230 has 16 input channels, the MAX1228 has 12 input channels, and the MAX1226 has 8 input channels. All input channels are configurable for single-ended or differential inputs in unipolar or bipolar mode. All three devices operate from a +5V supply and contain a 10MHz SPI?/QSPI?/MICROWIRE?-compatible serial port.

The MAX1230 is available in 28-pin 5mm x 5mm thin QFN with exposed pad and 24-pin QSOP packages. The MAX1226/MAX1228 are only available in QSOP packages. All three devices are specified over the extended -40°C to +85°C temperature range.

Features

? Internal Temperature Sensor (±0.7°C Accuracy)

? 16-Entry First-In/First-Out (FIFO)

? Analog Multiplexer with True Differential Track/Hold

16-, 12-, 8-Channel Single Ended

8-, 6-, 4-Channel True Differential

(Unipolar or Bipolar)

? Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing

Codes Over Temperature

? Scan Mode, Internal Averaging, and Internal Clock

? Low-Power Single +5V Operation

2.3mA at 300ksps

? Internal 4.096V Reference or External Differential Reference

? 10MHz 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface

? Space-Saving 28-Pin 5mm x 5mm Thin QFN Package

Applications

System Supervision

Data-Acquisition Systems

Industrial Control Systems

Patient Monitoring

Data Logging

Instrumentation