●Description
●The MAX1220/MAX1257/MAX1258 integrate a 12-bit, multichannel, analog-to-digital converter (ADC), and a 12-
●bit, octal, digital-to-analog converter (DAC) in a single IC. These 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 8 and 16 input-channel versions. The octal 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)
● 16 Single-Ended Channels or 8 Differential Channels (Unipolar or Bipolar) (MAX1257/MAX1258)
● Eight Single-Ended Channels or Four Differential Channels (Unipolar or Bipolar) (MAX1220)
● Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
●♦12-Bit, Octal, 2µs Settling DAC
● 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 or 4.096V
●♦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 +3.6V or +4.75V to +5.25V
●♦Digital Supply: +2.7V to AVDD
●♦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)General
●Applications
●Controls for Optical Components
●Base-Station Control Loops
●System Supervision and Control
●Data-Acquisition Systems
