General Description

The MAX1221/MAX1223/MAX1343 integrate a multichannel, 12-bit, analog-to-digital converter (ADC) and a 12-bit, digital-to-analog converter (DAC) in a single IC. The devices also include a temperature sensor and configurable general-purpose I/O ports (GPIOs) with a 25MHz SPI?-/QSPI?-/MICROWIRE?-compatible serial interface. The ADC is available in a 12 or an eight input-channel version. The DAC outputs settle within 2.0μs, and the ADC has a 225ksps conversion rate.

Features

? 12-Bit, 225ksps ADC

??? Analog Multiplexer with True-Differential Track/Hold (T/H)

??? 12 Single-Ended Channels or Six Differential

??? Channels (Unipolar or Bipolar) (MAX1223)

??? Eight Single-Ended Channels or Four Differential Channels (Unipolar or Bipolar) (MAX1221/MAX1343)

??? Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL

? 12-Bit, Octal, 2μs Settling DAC (MAX1221/MAX1223)

??? Ultra-Low Glitch Energy (4nV?s)

??? Power-Up Options from Zero Scale or Full Scale

??? Excellent Accuracy: ±0.5 LSB INL

? Internal Reference or External Single-Ended/ Differential Reference Internal Reference Voltage 2.5V

? Internal ±1°C Accurate Temperature Sensor

? On-Chip FIFO Capable of Storing 16 ADC Conversion Results and One Temperature Result

? On-Chip Channel-Scan Mode and Internal Data-Averaging Features

? Analog Single-Supply Operation +2.7V to +5.25V

? 2.7V to AVDD Digital Supply

? 25MHz, SPI/QSPI/MICROWIRE Serial Interface

? AutoShutdown Between Conversions

? Low-Power ADC 2.5mA at 225ksps 22μA at 1ksps 0.2μA at Shutdown

? Low-Power DAC: 1.5mA

? Evaluation Kit Available (Order MAX1258EVKIT)

Applications

??? Closed-Loop Controls for Optical Components and Base Stations

??? System Supervision and Control

??? Data-Acquisition Systems